MAX3246E MAX3237E MAX3222E MAX3232E MAX242 MAX232 MAX3241E MAX3246E
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19-1298; 10/07
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
MAX3246E +3.0V-powered EIA/TIA-232 V.28/V.24 communications interface devices feature power consumption, high data-rate capabilities, enhanced electrostatic-discharge (ESD) protection. enhanced structure protects transmitter outputs receiver inputs ±15kV using 1000-4-2 Air-Gap Discharge, ±8kV using 1000-4-2 Contact Discharge (±9kV MAX3246E), ±15kV using Human Body Model. logic receiver pins MAX3237E protected above standards, while transmitter output pins protected ±15kV using Human Body Model. proprietary low-dropout transmitter output stage delivers true RS-232 performance from +3.0V +5.5V power supply, using internal dual charge pump. charge pump requires only four small 0.1µF capacitors operation from +3.3V supply. Each device guarantees operation data rates 250kbps while maintaining RS-232 output levels. MAX3237E guarantees operation 250kbps normal operating mode 1Mbps MegaBaudoperating mode, while maintaining RS-232compliant output levels. MAX3222E/MAX3232E have receivers transmitters. MAX3222E features shutdown mode that reduces power consumption battery-powered portable systems. MAX3222E receivers remain active shutdown mode, allowing monitoring external devices while consuming only supply current. MAX3222E MAX3232E pin, package, functionally compatible with industry-standard MAX242 MAX232, respectively. MAX3241E/MAX3246E complete serial ports (three drivers/five receivers) designed notebook subnotebook computers. MAX3237E (five drivers/ three receivers) ideal peripheral applications that require fast data transfer. These devices feature shutdown mode which receivers remain active, while consuming only (MAX3241E/MAX3246E) 10nA (MAX3237E). MAX3222E, MAX3232E, MAX3241E available space-saving SSOP, TQFN TSSOP packages. MAX3237E offered SSOP package. MAX3246E offered ultra-small UCSPpackage.
Next-Generation Device Features
Space-Constrained Applications MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V +5.5V, RS-232 Transceivers UCSP Low-Voltage Data Cable Applications MAX3380E/MAX3381E: +2.35V +5.5V, 2Tx/2Rx, RS-232 Transceivers with ±15kV ESD-Protected Logic Pins
/MAX3246E
_Ordering Information
PART PINTEMP RANGE PACKAGE +70°C +70°C +70°C +70°C +70°C +70°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C +70°C +70°C +70°C Thin QFNEP** (5mm 5mm) TSSOP SSOP Wide Plastic Dice* Thin QFNEP** (5mm 5mm) TSSOP SSOP Wide Plastic SSOP Wide Plastic CODE T2055-5 T2055-5
MAX3222ECTP MAX3222ECUP MAX3222ECAP MAX3222ECWN MAX3222ECPN MAX3222EC/D MAX3222EETP MAX3222EEUP MAX3222EEAP MAX3222EEWN MAX3222EEPN MAX3232ECAE MAX3232ECWE MAX3232ECPE
*Dice tested +25°C, parameters only. **EP Exposed paddle.
Ordering Information continued data sheet. Configurations, Selector Guide, Typical Operating Circuits appear data sheet. MegaBaud UCSP trademarks Maxim Integrated Products, Inc.
Covered U.S. Patent numbers 4,636,930; 4,679,134;
Applications
Battery-Powered Equipment Cell Phones Cell-Phone Data Cables Notebook, Subnotebook, Palmtop Computers Printers Smart Phones xDSL Modems
4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; other patents pending.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim Direct 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
ABSOLUTE MAXIMUM RATINGS
.-0.3V 18-Pin PDIP (derate 11.11mW/°C above +70°C).889mW (Note .-0.3V 20-Pin TQFN (derate 21.3mW/°C above +70°C) .1702mW (Note .+0.3V 20-Pin TSSOP (derate 10.9mW/°C above +70°C) .879mW |V-| (Note 1).+13V 20-Pin SSOP (derate 8.00mW/°C above +70°C) .640mW Input Voltages 28-Pin SSOP (derate 9.52mW/°C above +70°C) .762mW T_IN, SHDN, MBAUD .-0.3V 28-Pin Wide (derate 12.50mW/°C above +70°C) R_IN .±25V 28-Pin TSSOP (derate 12.8mW/°C above +70°C) .1026mW Output Voltages 32-Lead Thin (derate 33.3mW/°C above +70°C).2666mW T_OUT GND.±13.2V UCSP (derate 12.6mW/°C above +70°C) .1010mW R_OUT, R_OUTB (MAX3241E).-0.3V (VCC 0.3V) Operating Temperature Ranges Short-Circuit Duration, T_OUT GND.Continuous MAX32_ _EC_ .0°C +70°C Continuous Power Dissipation +70°C) MAX32_ _EE_ _.-40°C +85°C 16-Pin SSOP (derate 7.14mW/°C above +70°C) .571mW Storage Temperature Range .-65°C +150°C 16-Pin TSSOP (derate 9.4mW/°C above +70°C) .754.7mW Lead Temperature (soldering, 10s) .+300°C 16-Pin TQFN (derate 20.8mW/°C above +70°C) .1666.7mW Bump Reflow Temperature (Note 16-Pin Wide (derate 9.52mW/°C above +70°C) .762mW Infrared, 15s.+200°C 18-Pin Wide (derate 9.52mW/°C above +70°C) .762mW Vapor Phase, 20s.+215°C Note have maximum magnitudes their absolute difference cannot exceed 13V. Note This device constructed using unique packaging techniques that impose limit thermal profile device exposed during board-level solder attach rework. This limit permits only solder profiles recommended industry-standard specification, JEDEC 020A, paragraph 7.6, Table IR/VPR convection reflow. Preheating required. Hand wave soldering allowed.
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC +5.5V, C1-C4 0.1µF, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Notes
PARAMETER CONDITIONS UNITS
CHARACTERISTICS (VCC +3.3V +5V, +25°C) Supply Current SHDN VCC, load SHDN SHDN R_IN GND, T_IN (MAX3237E) T_IN, SHDN, MBAUD T_IN, SHDN, MBAUD +3.3V +5.0V Transmitter Input Hysteresis Input Leakage Current RECEIVER OUTPUTS Output Leakage Current Output-Voltage R_OUT (MAX3222E/MAX3237E/MAX3241E/ MAX3246E), VCC, receivers disabled IOUT 1.6mA (MAX3222E/MAX3232E/MAX3241E/ MAX3246E), IOUT 1.0mA (MAX3237E) ±0.05 T_IN, SHDN T_IN, SHDN, MBAUD MAX3222E, MAX3232E, MAX3241E, MAX3246E MAX3237E (Note ±0.01 MAX3222E, MAX3232E, MAX3241E, MAX3246E MAX3237E Shutdown Supply Current LOGIC INPUTS Input Logic Input Logic High
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
ELECTRICAL CHARACTERISTICS (continued)
(VCC +5.5V, C1-C4 0.1µF, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Notes
PARAMETER Output-Voltage High RECEIVER INPUTS Input Voltage Range Input Threshold Input Threshold High Input Hysteresis Input Resistance TRANSMITTER OUTPUTS Output Voltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current +3.0V +5.5V, VOUT ±12V, transmitters disabled transmitter outputs loaded with ground (Note transmitter output ±5.4 +25°C +25°C +25°C +3.3V +5.0V +3.3V +5.0V IOUT -1.0mA CONDITIONS UNITS
MOUSE DRIVABILITY (MAX3241E) T1IN T2IN GND, T3IN VCC, T3OUT loaded with Transmitter Output Voltage GND, T1OUT T2OUT loaded with 2.5mA each PROTECTION Human Body Model R_IN, T_OUT 1000-4-2 Air-Gap Discharge (except MAX3237E) 1000-4-2 Contact Discharge (except MAX3237E) 1000-4-2 Contact Discharge (MAX3246E only) T_IN, R_IN, R_OUT, SHDN, MBAUD Human Body Model MAX3237E 1000-4-2 Air-Gap Discharge 1000-4-2 Contact Discharge
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
TIMING
(VCC +5.5V, C1-C4 0.1µF, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Notes
PARAMETER SYMBOL CONDITIONS 1000pF, transmitter switching tPHL tPLH TMIN TMAX (MAX3222E/MAX3232E/ MAX3241E) (Note +25°C (MAX3246E) 0.15 0.15 +3.3V, +25°C, measured from +3.0V -3.0V -3.0V +3.0V, transmitter switching 150pF 1000pF UNITS
Maximum Data Rate
kbps
Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Transmitter Skew Receiver Skew
Receiver input receiver output, 150pF Normal operation (except MAX3232E) Normal operation (except MAX3232E)
|tPHL tPLH| |tPHL tPLH|
(Note
Transition-Region Slew Rate
V/µs
TIMING CHARACTERISTICS-MAX3237E
(VCC +5.5V, C1-C4 0.1µF, TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER CONDITIONS 1000pF, transmitter switching, MBAUD Maximum Data Rate +3.0V +4.5V, 250pF, transmitter switching, MBAUD +4.5V +5.5V, 1000pF, transmitter switching, MBAUD Receiver Propagation Delay Receiver Output Enable Time Receiver Output Disable Time Transmitter Skew (Note Receiver Skew R_IN R_OUT, 150pF Normal operation Normal operation tPHL tPLH MBAUD tPHL tPLH MBAUD tPHL tPLH +3.3V, +3.0V -3.0V -3.0V +3.0V, +25°C 150pF 1000pF MBAUD MBAUD tPHL tPLH 1000 1000 0.15 0.15 V/µs kbps UNITS
Transition-Region Slew Rate
150pF 2500pF, MBAUD Note MAX3222E/MAX3232E/MAX3241E: C1-C4 0.1µF tested +3.3V ±10%; 0.047µF, 0.33µF tested +5.0V ±10%. MAX3237E: C1-C4 0.1µF tested +3.3V ±5%, C1-C4 0.22µF tested +3.3V ±10%; 0.047µF, 0.33µF tested +5.0V ±10%. MAX3246E; C1-C4 0.22µF tested +3.3V ±10%; 0.22µF, 0.54µF tested 5.0V ±10%. Note MAX3246E devices production tested +25°C. limits guaranteed design over operating temperature range. Note MAX3237E logic inputs have active positive feedback resistor. input current goes zero when inputs supply rails. Note MAX3241EEUI specified +25°C. Note Transmitter skew measured transmitter zero crosspoints.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
_Typical Operating Characteristics
(VCC +3.3V, 250kbps data rate, 0.1µF capacitors, transmitters loaded with +25°C, unless otherwise noted.)
MAX3222E/MAX3232E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
MAX3237E toc01
/MAX3246E
MAX3222E/MAX3232E SLEW RATE LOAD CAPACITANCE
MAX3237E toc02
MAX3222E/MAX3232E OPERATING SUPPLY CURRENT LOAD CAPACITANCE
SUPPLY CURRENT (mA) 250kbps 20kbps 120kbps TRANSMITTING 250kbps TRANSMITTING 15.6kbps
MAX3237E toc03
TRANSMITTER OUTPUT VOLTAGE
SLEW RATE (V/s) +SLEW -SLEW
VOUT+ TRANSMITTING 250kbps TRANSMITTING 15.6kbps
VOUT-
DATA RATES 250kbps
4000 5000 1000 2000 3000 4000 5000
1000
2000
3000
4000
5000
1000
2000
3000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3241E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
MAX3237E to04
MAX3241E SLEW RATE LOAD CAPACITANCE
MAX3237E toc05
MAX3241E OPERATING SUPPLY CURRENT LOAD CAPACITANCE
TRANSMITTER 250kbps TRANSMITTERS 15.6kbps 250kbps 20kbps 120kbps
MAX3237E toc06
TRANSMITTER OUTPUT VOLTAGE 1000 2000 3000 VOUT+ TRANSMITTER 250kbps TRANSMITTERS 15.6kbps
SLEW RATE (V/s)
SUPPLY CURRENT (mA)
VOUT4000 5000
1000 2000 3000 4000 5000
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE (MBAUD GND)
TRANSMITTER OUTPUT VOLTAGE TRANSMITTER OUTPUT VOLTAGE 1000 1500 2000 2500 3000 LOAD CAPACITANCE (pF) VOUT+ DATA RATES 250kbps TRANSMITTER 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH
MAX3237E toc07
MAX3237E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
MAX3246E toc07A
MAX3237E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE (MBAUD VCC)
1Mbps TRANSMITTER OUTPUT VOLTAGE -2.5 -5.0 -7.5 2Mbps 1.5Mbps 1Mbps 3000 1000 1500 2000 TRANSMITTER FULL DATA RATE TRANSMITTERS 1/16 DATA RATE LOAD, EACH OUTPUT 2Mbps 1.5Mbps
MAX3237E toc08
VOUT+
DATA RATES 250kbps TRANSMITTER 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH
VOUT-
VOUT500 1000 1500 2000 2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Typical Operating Characteristics (continued)
(VCC +3.3V, 250kbps data rate, 0.1µF capacitors, transmitters loaded with +25°C, unless otherwise noted.)
MAX3237E SLEW RATE LOAD CAPACITANCE (MBAUD GND)
MAX3237E toc09
MAX3237E SLEW RATE LOAD CAPACITANCE (MBAUD VCC)
MAX3237E toc10
MAX3237E SUPPLY CURRENT LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD GND)
250kbps SUPPLY CURRENT (mA) 120kbps 20kbps
MAX3237E toc11
SRSLEW RATE (V/s) 1000 1500 2000 2500 TRANSMITTER 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH
SLEW RATE (V/s) -SLEW, 1Mbps +SLEW, 1Mbps -SLEW, 2Mbps +SLEW, 2Mbps
TRANSMITTER 20kbps, 120kbps, 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH 1000 1500 2000 2500 3000
TRANSMITTER FULL DATA RATE TRANSMITTERS 1/16 DATA RATE LOAD EACH OUTPUT 1000 1500 2000
LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF)
3000
LOAD CAPACITANCE (pF)
MAX3237E TRANSMITTER SKEW LOAD CAPACITANCE (MBAUD VCC)
MAX3237E toc12
MAX3237E TRANSMITTER OUTPUT VOLTAGE SUPPLY VOLTAGE (MBAUD GND)
TRANSMITTER OUTPUT VOLTAGE VOUT+
MAX3237E toc13
MAX3237E SUPPLY CURRENT SUPPLY VOLTAGE (MBAUD GND)
MAX3237E toc14
TRANSMITTER SKEW (ns)
SUPPLY CURRENT (mA)
|tPLH tPHL| TRANSMITTER 500kbps TRANSMITTERS 1/16 DATA RATE TRANSMITTERS LOADED WITH 1000 1500 2000 LOAD CAPACITANCE (pF)
TRANSMITTER 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH 1000pF
TRANSMITTER 250kbps TRANSMITTERS 15.6kbps TRANSMITTERS LOADED WITH 1000pF
VOUT-
SUPPLY VOLTAGE
SUPPLY VOLTAGE
MAX3246E TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
MAX3237E toc15
MAX3246E SLEW RATE LOAD CAPACITANCE
MAX3237E toc16
MAX3246E OPERATING SUPPLY CURRENT LOAD CAPACITANCE
20kbps TRANSMITTER 250kbps TRANSMITTERS 15.6kbps
MAX3237E toc17
SLEW RATE (V/s)
TRANSMITTER OUTPUT VOLTAGE
VOUT+ TRANSMITTER 250kbps TRANSMITTERS 15.6kbps
SUPPLY CURRENT (mA)
250kbps 120kbps
VOUT4 1000 2000 3000 4000 5000 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF)
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Description
MAX3222E TQFN TSSOP/ TQFN SSOP MAX3232E MAX3241E FUNCTION SO/DIP/ NAME MAX3237E MAX3246E SSOP/ SSOP/ 20-PIN TQFN 16-PIN TSSOP TSSOP
/MAX3246E
Receiver Enable. Active low. Positive Terminal Voltage-Doubler ChargePump Capacitor +5.5V Generated Charge Pump Negative Terminal Voltage-Doubler ChargePump Capacitor Positive Terminal Inverting Charge-Pump Capacitor Negative Terminal Inverting Charge-Pump Capacitor -5.5V Generated Charge Pump RS-232 Transmitter Outputs
T_OUT
R_IN
RS-232 Receiver Inputs
17*, 19*, 22*, 23*,
15-19
R_OUT
TTL/CMOS Receiver Outputs
T_IN
TTL/CMOS Transmitter Inputs
*These pins have active positive feedback resistor internal MAX3237E, allowing unused inputs left unconnected.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Description (continued)
MAX3222E TQFN MAX3232E MAX3241E FUNCTION SO/DIP/ NAME MAX3237E SSOP/ MAX3246E TSSOP/ SSOP/ 20-PIN TQFN TQFN SSOP 16-PIN TSSOP TSSOP TSSOP SHDN
Ground +3.0V +5.5V Supply Voltage Shutdown Control. Active low. Connection. MAX3246E, these locations populated with solder bumps. MegaBaud Control Input. Connect normal operation; connect 1Mbps transmission rates. Noninverting Complementary Receiver Outputs. Always active. Exposed Paddle. Solder exposed paddle ground plane leave unconnected.
N.C.
MBAUD
R_OUTB
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
0.1F
0.1F
C1C2+ C2T_
MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E
C2T_
MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E
1000pF (2500pF, MAX3237E only)
150pF
MINIMUM SLEW-RATE TEST CIRCUIT
MAXIMUM SLEW-RATE TEST CIRCUIT
Figure Slew-Rate Test Circuits
Detailed Description
Dual Charge-Pump Voltage Converter
MAX3246Es' internal power supply consists regulated dual charge pump that provides output voltages +5.5V (doubling charge pump) -5.5V (inverting charge pump) over +3.0V +5.5V range. charge pump operates discontinuous mode; output voltages less than 5.5V, charge pump enabled, output voltages exceed 5.5V, charge pump disabled. Each charge pump requires flying capacitor (C1, reservoir capacitor (C3, generate supplies (Figure
into high-impedance state when device shutdown mode (SHDN GND). MAX3222E/ permit outputs driven ±12V shutdown. transmitter inputs have pullup resistors. Connect unused inputs VCC. MAX3237E's transmitter inputs have 400k active positive-feedback resistor, allowing unused inputs left unconnected.
MAX3237E MegaBaud Operation
higher-speed serial communications, MAX3237E features MegaBaud operation. MegaBaud operating mode (MBAUD MAX3237E transmitters guarantee 1Mbps data rate with worst-case loads parallel with 250pF +3.0V +4.5V. ±10% operation, MAX3237E transmitters guarantee 1Mbps data rate into worst-case loads parallel with 1000pF.
RS-232 Transmitters
transmitters inverting level translators that convert TTL/CMOS-logic levels EIA/TIA-232-compliant levels. MAX3246E transmitters guarantee 250kbps data rate with worst-case loads parallel with 1000pF, providing compatibility with PC-to-PC communication software (such LapLinkTM). Transmitters paralleled drive multiple receivers mice. transmitters disabled outputs forced
LapLink trademark Traveling Software.
RS-232 Receivers
receivers convert RS-232 signals CMOS-logic output levels. MAX3222E/MAX3237E/MAX3241E/ MAX3246E receivers have inverting three-state outputs. Drive high place receiver(s) into highimpedance state. Receivers either active inactive shutdown (Table
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
5V/div SHDN T2OUT
PROTECTION DIODE
PREVIOUS RS-232
2V/div
UART SHDN
3.3V C1-C4 0.1F 40s/div T1OUT
OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM ACTIVE RECEIVER OUTPUT SHUTDOWN. LOGIC TRANSITION DETECTOR
Figure Transmitter Outputs Recovering from Shutdown Powering
MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown Mode
MAX3237E/MAX3241E
R1OUTB
PROTECTION DIODE
R1OUT THREE-STATED
R1IN
UART T1IN SHDN
T1OUT
Supply current falls less than shutdown mode (SHDN low). MAX3237E's supply current falls to10nA (typ) when receiver inputs invalid range (-0.3V R_IN +0.3). When shut down, device's charge pumps shut off, pulled down VCC, pulled ground, transmitter outputs disabled (high impedance). time required recover from shutdown typically 100µs, shown Figure Connect SHDN shutdown mode used. SHDN effect R_OUT R_OUTB (MAX3237E/MAX3241E).
±15kV Protection
with Maxim devices, ESD-protection structures incorporated protect against electrostatic discharges encountered during handling assembly. driver outputs receiver inputs have extra protection against static electricity. Maxim's engineers have developed state-of-the-art structures protect these pins against ±15kV without damage. structures withstand high states: normal operation, shutdown, powered down. After event, Maxim's versions keep working without latchup, whereas competing RS-232 products latch must powered down remove latchup. Furthermore, MAX3237E logic pins also have ±15kV protection. Protecting logic pins ±15kV makes MAX3237E ideal data cable applications.
MAX3237E/MAX3241E: SHUTS DOWN RECEIVER OUTPUTS (EXCEPT OUTPUTS), CURRENT FLOWS UART SHUTDOWN. OUTPUTS INDICATE RECEIVER ACTIVITY DURING SHUTDOWN WITH HIGH.
Figure Detection RS-232 Activity when UART Interface Shut Down; Comparison MAX3237E/MAX3241E with Previous Transceivers
complementary outputs MAX3237E/ MAX3241E (R_OUTB) always active, regardless state SHDN. This allows device used ring indicator applications without forward biasing other devices connected receiver outputs. This ideal systems where drops zero shutdown accommodate peripherals such UARTs (Figure
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Table MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown Enable Control Truth Table
SHDN T_OUT High impedance High impedance Active Active R_OUT R_OUTB (MAX3237E/ MAX3241E) Active Active Active Active
protection tested various ways; transmitter outputs receiver inputs characterized protection following limits: ±15kV using Human Body Model ±8kV using Contact Discharge method specified 1000-4-2 ±9kV (MAX3246E only) using Contact Discharge method specified 1000-4-2 ±15kV using Air-Gap Discharge method specified 1000-4-2
/MAX3246E
Active High impedance Active High impedance
CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE SOURCE
1500 DISCHARGE RESISTANCE DEVICEUNDERTEST
100% AMPERES 36.8% TIME
PEAK-TO-PEAK RINGING (NOT DRAWN SCALE)
100pF
STORAGE CAPACITOR
CURRENT WAVEFORM
Figure Human Body Test Model
Figure Human Body Model Current Waveform
100% 100M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE SOURCE DISCHARGE RESISTANCE DEVICEUNDERTEST
150pF
STORAGE CAPACITOR
PEAK
0.7ns 30ns 60ns
Figure 1000-4-2 Test Model
Figure 1000-4-2 Generator Current Waveform
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
MAX3237E/MAX3246E 3.15
(µF) 0.047 0.22 0.047 0.22
(µF) 0.33 0.47 0.22 0.33
TRANSMITTER OUTPUT VOLTAGE
3.0V VOUT+
VOUT+
MAX3222E/MAX3232E/MAX3241E
VOUTVOUT-
LOAD CURRENT TRANSMITTER (mA)
Table Logic-Family Compatibility with Various Supply Voltages
SYSTEM POWER-SUPPLY VOLTAGE SUPPLY VOLTAGE COMPATIBILITY
Figure MAX3241E Transmitter Output Voltage Load Current Transmitter
1000-4-2
1000-4-2 standard covers testing performance finished equipment; does specifically refer integrated circuits. MAX3222E/ help design equipment that meets level (the highest level) 1000-4-2, without need additional ESDprotection components. major difference between tests done using Human Body Model 1000-4-2 higher peak current 1000-4-2, because series resistance lower 1000-4-2 model. Hence, withstand voltage measured 1000-4-2 generally lower than that measured using Human Body Model. Figure shows 1000-4-2 model, Figure shows current waveform ±8kV 1000-4-2 level Contact Discharge test. AirGap Discharge test involves approaching device with charged probe. Contact Discharge method connects probe device before probe energized.
Compatible with CMOS families Compatible with CMOS families Compatible with CMOS, with CD4000 CMOS
MAX3237E, logic RS-232 pins characterized protection ±15kV Human Body Model.
Test Conditions
performance depends variety conditions. Contact Maxim reliability report that documents test setup, test methodology, test results.
Machine Model
Machine Model tests pins using 200pF storage capacitor zero discharge resistance. objective emulate stress caused contact that occurs with handling assembly during manufacturing. pins require this protection during manufacturing, just RS-232 inputs outputs. Therefore, after board assembly, Machine Model less relevant ports.
Human Body Model
Figure shows Human Body Model, Figure shows current waveform generates when discharged into impedance. This model consists 100pF capacitor charged voltage interest, which then discharged into test device through 1.5k resistor.
MAX3222E-fig06a
Table Required Minimum Capacitor Values
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
+3.0V +5.5V
CBYPASS COMPUTER SERIAL PORT R1IN SHDN R2IN R3IN R4IN R5IN MOUSE
C1C2+ C2T1IN T2IN T3IN R1OUTB R2OUTB R1OUT R2OUT R3OUT R4OUT R5OUT
MAX3241E
VT1OUT T2OUT T3OUT
Figure Mouse Driver Test Circuit
Applications Information
Capacitor Selection
capacitor type used C1-C4 critical proper operation; polarized nonpolarized capacitors used. charge pump requires 0.1µF capacitors 3.3V operation. other supply voltages, Table required capacitor values. values smaller than those listed Table Increasing capacitor values (e.g., factor reduces ripple transmitter outputs slightly reduces power consumption. increased without changing C1's value. However, increase without also increasing values CBYPASS maintain proper ratios other capacitors). When using minimum required capacitor values, make sure capacitor value does degrade
excessively with temperature. doubt, capacitors with larger nominal value. capacitor's equivalent series resistance (ESR), which usually rises temperatures, influences amount ripple
Power-Supply Decoupling
most circumstances, 0.1µF bypass capacitor adequate. applications sensitive power-supply noise, capacitor same value chargepump capacitor Connect bypass capacitors close possible.
Operation Down 2.7V
Transmitter outputs meet EIA/TIA-562 levels ±3.7V with supply voltages 2.7V.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Transmitter Outputs Recovering from Shutdown
Figure shows transmitter outputs recovering from shutdown mode. they become active, transmitter outputs shown going opposite RS-232 levels (one transmitter input high; other low). Each transmitter loaded with parallel with 2500pF. transmitter outputs display ringing undesirable transients they come shutdown. Note that
transmitters enabled only when magnitude exceeds approximately -3.0V.
Mouse Drivability
MAX3241E designed power serial mice while operating from low-voltage power supplies. been tested with leading mouse brands from manufacturers such Microsoft Logitech. MAX3241E successfully drove serial mice tested their current voltage requirements.
0.1F
T1IN
C1C2+ C2V+
5V/div
T1OUT
5V/div
MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E
R1OUT
5V/div 3.3V, C1-C4 0.1F 2s/div
Figure MAX3241E Loopback Test Result 250kbps
1000pF
T_IN
Figure Loopback Test Circuit
3.3V C1-C4 0.1F T_OUT 250pF
T1IN
5V/div
R_OUT
5V/div T1OUT
400ns/div
Figure MAX3237E Loopback Test Result 1000kbps (MBAUD VCC)
3.3V C1-C4 0.1F 2s/div 5V/div
R1OUT
Figure MAX3241E Loopback Test Result 120kbps
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Figure shows transmitter output voltages under increasing load current +3.0V. Figure shows typical mouse connection using MAX3241E.
UCSP Reliability
UCSP represents unique packaging form factor that perform equally packaged product through traditional mechanical reliability tests. UCSP reliability integrally linked user's assembly methods, circuit board material, usage environment. user should closely review these areas when considering UCSP package. Performance through Operating Life Test Moisture Resistance remains uncompromised wafer-fabrication process primarily determines Mechanical stress performance greater consideration UCSP package. UCSPs attached through direct solder contact user's board, foregoing inherent stress relief packaged product lead frame. Solder joint contact integrity must considered. Table shows testing done characterize UCSP reliability performance. conclusion, UCSP capable performing reliably through environmental stresses indicated results table. Additional usage data recommendations detailed Application Note 1891: Wafer-Level Packaging (WLP) Applications.
/MAX3246E
High Data Rates
MAX3246E maintain RS-232 minimum transmitter output voltage even high data rates. Figure shows transmitter loopback test circuit. Figure shows loopback test result 120kbps, Figure shows same test 250kbps. Figure transmitters were driven simultaneously 120kbps into RS232 loads parallel with 1000pF. Figure single transmitter driven 250kbps, transmitters were loaded with RS-232 receiver parallel with 1000pF. MAX3237E maintains RS-232 ±5.0V minimum transmitter output voltage data rates 1Mbps. Figure shows loopback test result 1Mbps with MBAUD VCC. Figure transmitters were loaded with RS-232 receiver parallel with 250pF.
Interconnection with Logic
MAX3246E directly interface with various logic families, including CMOS. Table more information possible combinations interconnections.
Table Reliability Test Data
TEST Temperature Cycle Operating Life Moisture Resistance Low-Temperature Storage Low-Temperature Operational Solderability High-Temperature Operating Life CONDITIONS -35°C +85°C, -40°C +100°C +70°C +20°C +60°C, -20°C -10°C 8-hour steam ±15kV, Human Body Model +150°C DURATION cycles, cycles hours hours hours hours hours FAILURES SAMPLE SIZE 0/10, 0/200 0/10 0/10 0/10 0/10 0/15 0/45
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
_Pin Configurations
VIEW
C2VT2OUT R2IN
SHDN T1OUT
T2OUT R2IN R2OUT
SHDN T1OUT
N.C. T2OUT R2IN N.C.
N.C. T1OUT
T2OUT R2IN
T1OUT
MAX3232E
R1IN R1OUT T1IN T2IN R2OUT
MAX3222E
R1IN R1OUT T1IN T2IN R2OUT
MAX3222E
R1IN R1OUT N.C. T1IN T2IN N.C.
MAX3232E
R1IN R1OUT T1IN T2IN R2OUT N.C.
SO/DIP/SSOP/TSSOP
SO/DIP TSSOP/SSOP TSSOP VIEW
C2VT1OUT T2OUT T3OUT R1IN R2IN C124 T1IN C2VR1IN R2IN R3IN R4IN R5IN T1OUT
N.C.
N.C.
R1IN R2IN R3IN R4IN R5IN T1OUT T2OUT T3OUT
C1EN SHDN R1OUTB R2OUTB R1OUT R2OUT
MAX3237E
T2IN T3IN R1OUT R2OUT T4IN R3OUT T5IN R1OUTB MBAUD
MAX3241E
SHDN R1OUTB R2OUTB R1OUT R2OUT R3OUT R4OUT R5OUT
MAX3241E
T4OUT R3IN T5OUT SHDN
T2OUT T3OUT T3IN T2IN T1IN
T3IN
T2IN
T1IN
N.C.
R5OUT
R4OUT
R3OUT
SSOP
SSOP/SO/TSSOP
N.C.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Configurations (continued)
R1OUT T1OUT R1IN R1IN
/MAX3246E
T1IN
SHDN
T2IN N.C.
T1IN
N.C.
VIEW
VIEW
T1OUT
R1OUT
T2IN R2OUT R2IN T2OUT
MAX3222E
EXPOSED PADDLE
R2OUT R2IN T2OUT
MAX3232E
EXPOSED PADDLE
TQFN
TQFN
VIEW (BUMPS BOTTOM) SHDN R1OUT T3IN T2IN T1IN BUMPS POPULATED
R4OUT R3OUT
R5OUT
R1IN
R2IN R3IN
R2OUT
R4IN
R5IN
MAX3246E
T3OUT
T2OUT
T1OUT
UCSP
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
_Typical Operating Circuits
+3.3V CBYPASS 0.1F 0.1F C1C2+ C2T1OUT RS-232 OUTPUTS T2IN T2OUT TTL/CMOS INPUTS T2IN T2OUT 0.1F 0.1F 0.1F 0.1F +3.3V CBYPASS C1C2+ C2T1OUT RS-232 OUTPUTS 0.1F 0.1F
MAX3222E
MAX3232E
T1IN TTL/CMOS INPUTS
T1IN
R1OUT TTL/CMOS OUTPUTS R2OUT
R1IN R2IN SHDN RS-232 INPUTS TTL/CMOS OUTPUTS
R1OUT
R1IN RS-232 INPUTS
R2OUT
R2IN
RETURNED EITHER GROUND.
NOTE: NUMBERS REFER SO/DIP PACKAGES. MAX3222E PINOUT REFERS SO/DIP PACKAGES. MAX3232E PINOUT REFERS TSSOP/SSOP/SO/DIP/ PACKAGES TABLE CAPACITOR SELECTION.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
_Typical Operating Circuits (continued)
/MAX3246E
+3.3V CBYPASS 0.1F 0.1F C1C2+ C2T1 T1OUT T2OUT T3OUT RS-232 OUTPUTS 0.1F 0.1F
+3.3V CBYPASS 0.1F C1C2+ C2T1OUT T2OUT T3OUT 0.1F 0.1F
0.1F
MAX3237E
MAX3241E
T1IN T2IN LOGIC INPUTS T3IN T4IN T5IN R1OUTB
T1IN T2IN T3IN R1OUTB R2OUTB
TTL/CMOS INPUTS
RS-232 OUTPUTS
T4OUT T5OUT R1OUT R1IN R2OUT R2IN R3OUT R3IN R4OUT R4IN R5OUT MBAUD SHDN R5IN RS-232 INPUTS R1IN TTL/CMOS OUTPUTS RS-232 INPUTS
R1OUT
LOGIC OUTPUTS
R2OUT
R2IN
R3OUT
R3IN
SHDN
RETURNED EITHER GROUND.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
_Typical Operating Circuits (continued)
+3.3V CBYPASS 0.1F C1C2+ C2T1OUT T2OUT T3OUT RS-232 OUTPUTS 0.1F 0.1F
0.1F
MAX3246E
T1IN TTL/CMOS INPUTS T2IN T3IN
R1OUT
R1IN
R2OUT
R2IN
TTL/CMOS OUTPUTS
R3OUT
R3IN
RS-232 INPUTS
R4OUT
R4IN
R5OUT
R5IN
SHDN
RETURNED EITHER GROUND.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Selector Guide
PART MAX3222E MAX3232E MAX3237E (Normal) MAX3237E (MegaBaud) MAX3241E MAX3246E GUARANTEED LOW-POWER DRIVERS/ DATA RATE SHUTDOWN RECEIVERS (bps) 250k 250k
MAX3232ECUE +70°C +70°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C +70°C -40°C +85°C +70°C +70°C +70°C +70°C -40°C +85°C -40°C +85°C -40°C +85°C +70°C
Ordering Information (continued)
PART PINTEMP RANGE PACKAGE +70°C Thin QFNEP** (5mm 5mm) TSSOP TSSOP SSOP Wide Plastic Thin QFNEP** (5mm 5mm) TSSOP TSSOP SSOP SSOP SSOP Wide TSSOP Thin SSOP Wide TSSOP UCSP UCSP CODE T1655-2 T1655-2
/MAX3246E
MAX3232ECTE
250k 250k 250k
MAX3232ECUP MAX3232EEAE MAX3232EEWE MAX3232EEPE MAX3232EETE MAX3232EEUE MAX3232EEUP MAX3237ECAI MAX3237EEAI MAX3241ECAI MAX3241ECWI MAX3241ECUI MAX3241ECTJ MAX3241EEAI MAX3241EEWI MAX3241EEUI MAX3246ECBX-T
Chip Information
TRANSISTOR COUNT: MAX3222E/MAX3232E: 1129 MAX3237E: 2110 MAX3241E: 1335 MAX3246E: PROCESS: BICMOS
MAX3246EEBX-T -40°C +85°C
Requires solder temperature profile described Absolute Maximum Ratings section. UCSP Reliability integrally linked user's assembly methods, circuit board material, environment. Refer UCSP Reliability Notice UCSP Reliability section this datasheet more information. **EP Exposed paddle.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Package Information
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
THIN.EPS
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
/MAX3246E
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
TSSOP4.40mm.EPS
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
36L,UCSP.EPS
/MAX3246E
PACKAGE OUTLINE, UCSP
21-0082
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
SOICW.EPS
INCHES
MILLIMETERS 2.35 0.10 0.35 0.23 2.65 0.30 0.49 0.32
0.093 0.104 0.004 0.012 0.014 0.019 0.013 0.009 0.050 0.299 0.291 0.394 0.419 0.050 0.016
1.27 7.40 7.60 10.00 10.65 0.40 1.27
VARIATIONS: INCHES MILLIMETERS 10.10 11.35 12.60 15.20 17.70 10.50 11.75 13.00 15.60 18.10 MS013
VIEW
0.398 0.447 0.496 0.598 0.697
0.413 0.463 0.512 0.614 0.713
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .300" SOIC
APPROVAL DOCUMENT CONTROL
21-0042
REV.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
SSOP.EPS
/MAX3246E
INCHES 0.068 0.002 0.010 0.078 0.008 0.015
MILLIMETERS 1.73 0.05 0.25 1.99 0.21 0.38 INCHES 0.239 0.239 0.278 0.317 0.397 0.249 0.249 0.289 0.328 0.407 MILLIMETERS 6.07 6.07 7.07 8.07 10.07 6.33 6.33 7.33 8.33 10.33
0.09 0.20 0.004 0.008 VARIATIONS 0.205 0.301 0.025 0.212 0.311 0.037 5.20 7.65 0.63 5.38 7.90 0.95 0.0256 0.65
NOTES: INCLUDE MOLD FLASH. MOLD FLASH PROTRUSIONS EXCEED (.006"). CONTROLLING DIMENSION: MILLIMETERS. MEETS JEDEC MO150. LEADS COPLANAR WITHIN 0.10
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, SSOP,
APPROVAL DOCUMENT CONTROL
21-0056
REV.
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
/MAX3246E
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
PDIPN.EPS
±15kV ESD-Protected, Down 10nA, 3.0V 5.5V, 1Mbps, True RS-232 Transceivers
Revision History
REVISION NUMBER REVISION DATE 10/07 Corrected Package Information DESCRIPTION PAGES CHANGED 22-28
/MAX3246E
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2007 Maxim Integrated Products registered trademark Maxim Integrated Products, Inc.
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