AT28BV64B
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AT28BV64B-20TU - AT28BV64B-20TU
AT28BV64B - AT28BV64B
Single 2.7V 3.6V Supply Hardware Software Data Protection Power Dissipation
Active Current CMOS Standby Current Fast Read Access Time Automatic Page Write Operation Internal Address Data Latches Bytes Internal Control Timer Fast Write Cycle Times Page Write Cycle Time: Maximum Byte Page Write Operation DATA Polling Write Detection High-reliability CMOS Technology Endurance: 100,000 Cycles Data Retention: Years JEDEC Approved Byte-wide Pinout Industrial Temperature Ranges Green (Pb/Halide-free) Packaging Option
Battery-Voltage Parallel EEPROM with Page Write Software Data Protection AT28BV64B
Description
AT28BV64B high-performance electrically erasable programmable read onlymemory (EEPROM). memory organized 8,192 words bits. Manufactured with Atmel's advanced nonvolatile CMOS technology, device offers access times with power dissipation just When device deselected, CMOS standby current less than AT28BV64B accessed like static read write cycle without need external components. device contains byte page register allow writing bytes simultaneously. During write cycle, addresses bytes data internally latched, freeing address data other operations. Following initiation write cycle, device will automatically write latched data using internal control timer. write cycle detected DATA polling I/O7. Once write cycle been detected access read write begin. Atmel's AT28BV64B additional features ensure high quality manufacturability. software data protection mechanism guards against inadvertent writes. device also includes extra bytes EEPROM device identification tracking.
0299H-PEEPR-10/06
Configurations
Name I/O0 I/O7 Function Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs Connect Don't Connect
32-lead PLCC View
Note:
PLCC package pins Don't Connect.
28-lead PDIP/SOIC View
I/O0 I/O1 I/O2 I/O7 I/O6 I/O5 I/O4 I/O3
28-lead TSOP View
I/O7 I/O6 I/O5 I/O4 I/O3 I/O2 I/O1 I/O0
AT28BV64B
0299H-PEEPR-10/06
I/O1 I/O2 I/O3 I/O4 I/O5
I/O0
I/O7 I/O6
AT28BV64B
Block Diagram
Device Operation
Read
AT28BV64B accessed like static RAM. When high, data stored memory location determined address pins asserted outputs. outputs high impedance state when either high. This dual-line control gives designers flexibility preventing contention their systems.
Byte Write
pulse input with (respectively) high initiates write cycle. address latched falling edge whichever occurs last. data latched first rising edge Once byte write been started, will automatically time itself completion. Once programming operation been initiated duration tWC, read operation will effectively polling operation.
Page Write
page write operation AT28BV64B allows bytes data written into device during single internal programming period. page write operation initiated same manner byte write; first byte written then followed additional bytes. Each successive byte must written within (tBLC) previous byte. tBLC limit exceeded, AT28BV64B will cease accepting data commence internal programming operation. bytes during page write operation must reside same page defined state inputs. each high transition during page write operation, must same. inputs specify which bytes within page written. bytes loaded order altered within same load period. Only bytes which specified writing will written; unnecessary cycling other bytes within page does occur.
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DATA Polling
AT28BV64B features DATA Polling indicate write cycle. During byte page write cycle attempted read last byte written will result complement written data presented I/O7. Once write cycle been completed, true data valid outputs, next write cycle begin. DATA Polling begin anytime during write cycle.
Toggle
addition DATA Polling, AT28BV64B provides another method determining write cycle. During write operation, successive attempts read data from device will result I/O6 toggling between zero. Once write completed, I/O6 will stop toggling valid data will read. Reading toggle begin time during write cycle.
Data Protection
precautions taken, inadvertent writes occur during transitions host system power supply. Atmel® incorporated both hardware software features that will protect memory against inadvertent writes.
4.6.1
Hardware Protection Hardware features protect against inadvertent writes AT28BV64B following ways: power-on delay once reached 1.8V (typical) device will automatically time (typical) before allowing write; write inhibit holding low, high high inhibits write cycles; noise filter pulses less than (typical) inputs will initiate write cycle. Software Data Protection software-controlled data protection feature been implemented AT28BV64B. Software data protection (SDP) helps prevent inadvertent writes from corrupting data device. prevent inadvertent writes during power-up power-down well other potential periods system instability. AT28BV64B only written using software data protection feature. series three write commands specific addresses with specific data must presented device before writing byte page mode. same three write commands must begin each write operation. software write commands must obey page mode write timing specifications. data 3-byte command sequence written device; addresses command sequence utilized just like other location device. attempt write device without 3-byte sequence will start internal write timers. data will written device; however, duration tWC, read operations will effectively polling operations.
4.6.2
Device Identification
extra bytes EEPROM memory available user device identification. raising 0.5V using address locations 7FC0H 7FFFH, additional bytes written read from same manner regular memory array.
AT28BV64B
0299H-PEEPR-10/06
AT28BV64B
Operating Range
AT28BV64B-20 Operating Temperature (Case) Power Supply -40° 2.7V 3.6V
Operating Modes
Mode Read Write
DOUT High
Standby/Write Inhibit Write Inhibit Write Inhibit Output Disable Chip Erase Notes: VIH. Refer Programming Waveforms. 12.0V 0.5V.
High High
Absolute Maximum Ratings*
Temperature Under Bias. -55° +125° Storage Temperature -65° +150° Input Voltages (including Pins) with Respect Ground .-0.6V +6.25V Output Voltages with Respect Ground .-0.6V 0.6V Voltage with Respect Ground .-0.6V +13.5V *NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability
Characteristics
Symbol Parameter Input Load Current Output Leakage Current Standby Current CMOS Active Current Input Voltage Input High Voltage Output Voltage Output High Voltage -100 0.45 Condition VI/O 0.3V MHz; IOUT Units
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Read Characteristics
AT28BV64B-20 Symbol tACC
Parameter Address Output Delay Output Delay Output Delay Output Float Output Hold from Address, Whichever Occurred First
Units
tOE(2) tDF(3)(4)
Read Waveforms(1)(2)(3)(4)
Notes:
delayed tACC after address transition without impact tACC. delayed after falling edge without impact tACC after address change without impact tACC. specified from whichever occurs first pF). This parameter characterized 100% tested.
AT28BV64B
0299H-PEEPR-10/06
AT28BV64B
Input Test Waveforms Measurement Level
Output Test Load
Capacitance
MHz, 25°C(1)
Symbol COUT Note: Units Conditions VOUT
This parameter characterized 100% tested.
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Write Characteristics
Symbol tAS, tOES tDH, tOEH tWPH Notes: Parameter Address, Set-up Time Address Hold Time Chip Select Set-up Time Chip Select Hold Time Write Pulse Width Data Set-up Time Data, Hold Time Time Data Valid Write Pulse Width High Restriction byte write operations must preceded command sequence. NR(1) Units
Write Waveforms
15.1 Controlled
15.2
Controlled
AT28BV64B
0299H-PEEPR-10/06
AT28BV64B
Page Mode Characteristics
Symbol tBLC tWPH Parameter Write Cycle Time Address Set-up Time Address Hold Time Data Set-up Time Data Hold Time Write Pulse Width Byte Load Cycle Time Write Pulse Width High Units
Write Algorithm(1)
LOAD DATA ADDRESS 1555
LOAD DATA ADDRESS 0AAA
LOAD DATA ADDRESS 1555
WRITES ENABLED(2)
LOAD DATA ADDRESS(3)
LOAD LAST BYTE LAST ADDRESS
ENTER DATA PROTECT STATE
Notes:
Data Format: I/O7 I/O0 (Hex); Address Format: (Hex). Data protect state will re-activated write cycle. bytes data loaded.
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Software Data Protection Write Cycle Waveforms(1)(2)(3)
Notes:
must conform addressing sequence first three bytes shown above. through must specify same page address during each high transition after software code been entered. must high only when both low.
Data Polling Characteristics(1)
Symbol tOEH Notes: Parameter Data Hold Time Hold Time Output Delay
Units
Write Recovery Time These parameters characterized 100% tested. Read Characteristics.
Data Polling Waveforms
AT28BV64B
0299H-PEEPR-10/06
AT28BV64B
Toggle Characteristics(1)
Symbol tOEH tOEHP Notes: Parameter Data Hold Time Hold Time Output Delay High Pulse Write Recovery Time These parameters characterized 100% tested. Read Characteristics.
Units
Toggle Waveforms
Notes:
Toggling either both will operate toggle bit. Beginning ending state I/O6 will vary. address location used, address should vary.
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Ordering Information(1)
23.1 Standard Package
(mA) Active Standby 0.05 Ordering Code AT28BV64B-20JI AT28BV64B-20PI AT28BV64B-20SI AT28BV64B-20TI Package 28P6 Operation Range Industrial (-40°
tACC (ns)
Note:
"Valid Part Numbers" below.
23.2
Green Package Option (Pb/Halide-free)
(mA) Active Standby 0.05 Ordering Code AT28BV64B-20JU AT28BV64B-20TU AT28BV64B-20SU Package Operation Range Industrial (-40°
tACC (ns)
Package Type 28P6 32-lead, Plastic J-leaded Chip Carrier (PLCC) 28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC) 28-lead, Plastic Thin Small Outline Package (TSOP)
Valid Part Numbers
following table lists standard Atmel products that ordered.
Device Numbers AT28BV64B Speed Package Temperature Combinations
AT28BV64B
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AT28BV64B
Packaging Information
25.1 PLCC
1.14(0.045)
IDENTIFIER
1.14(0.045) 0.318(0.0125) 0.191(0.0075)
0.51(0.020)MAX (3X)
COMMON DIMENSIONS (Unit Measure SYMBOL
3.175 1.524 0.381 12.319 11.354 9.906 14.859 13.894 12.471 0.660 0.330
1.270
3.556 2.413 12.573 11.506 10.922 15.113 14.046 13.487 0.813 0.533
NOTE
Note
Notes:
This package conforms JEDEC reference MS-016, Variation Dimensions include mold protrusion. Allowable protrusion .010"(0.254 side. Dimension include mold mismatch measured extreme material condition upper lower parting line. Lead coplanarity 0.004" (0.102 maximum.
Note
10/04/01 2325 Orchard Parkway Jose, 95131 TITLE 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) DRAWING REV.
0299H-PEEPR-10/06
25.2
28P6 PDIP
SEATING PLANE
SYMBOL
COMMON DIMENSIONS (Unit Measure 0.381 36.703 15.240 13.462 0.356 1.041 3.048 0.203 15.494 2.540 4.826 37.338 15.875 13.970 0.559 1.651 3.556 0.381 17.526 Note Note NOTE
Notes:
This package conforms JEDEC reference MS-011, Variation Dimensions include mold Flash Protrusion. Mold Flash Protrusion shall exceed 0.25 (0.010").
09/28/01 2325 Orchard Parkway Jose, 95131 TITLE 28P6, 28-lead (0.600"/15.24 Wide) Plastic Dual Inline Package (PDIP) DRAWING 28P6 REV.
AT28BV64B
0299H-PEEPR-10/06
AT28BV64B
25.3 SOIC
Dimensions Millimeters (Inches). Controlling dimension: Millimeters.
0.51(0.020) 0.33(0.013)
7.60(0.2992) 10.65(0.419) 7.40(0.2914) 10.00(0.394)
1.27(0.50)
VIEW
18.10(0.7125) 17.70(0.6969)
2.65(0.1043) 2.35(0.0926)
0.30(0.0118) 0.10(0.0040)
SIDE VIEWS
0.32(0.0125) 0.23(0.0091) 1.27(0.050) 0.40(0.016)
8/4/03 2325 Orchard Parkway Jose, 95131 TITLE 28S, 28-lead, 0.300" Body, Plastic Gull Wing Small Outline (SOIC) JEDEC Standard MS-013 DRAWING REV.
0299H-PEEPR-10/06
25.4
TSOP
Identifier Area
SEATING PLANE
GAGE PLANE
SYMBOL Notes: This package conforms JEDEC reference MO-183. Dimensions include mold protrusion. Allowable protrusion 0.15 side 0.25 side. Lead coplanarity 0.10 maximum.
COMMON DIMENSIONS (Unit Measure 0.05 0.90 13.20 11.70 7.90 0.50 1.00 13.40 11.80 8.00 0.60 0.25 BASIC 0.17 0.10 0.22 0.55 BASIC 0.27 0.21 1.20 0.15 1.05 13.60 11.90 8.10 0.70 Note Note NOTE
12/06/02 2325 Orchard Parkway Jose, 95131 TITLE 28T, 28-lead 13.4 Plastic Thin Small Outline Package, Type (TSOP) DRAWING REV.
AT28BV64B
0299H-PEEPR-10/06
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0299H-PEEPR-10/06
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