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TC74AC245 TC74AC245P TC74AC245F TC74AC245FT TC74AC640P TC74AC640F TC74AC640FT TC74AC245P F FT TC74AC640P F FT
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Octal Transceiver TC74AC245P/F/FT 3-State, Non-Inverting TC74AC640P/F/FT 3-State, Inverting
TC74AC245, advanced high speed CMOS OCTAL TRANSCEIVERs fabricated with silicon gate double-layer metal wiring C2MOS technology. They achieve high speed operation similar equivalent Bipolar Schottky while maintaining CMOS power dissipation. They intended two-way asynchronous communication between data busses. direction data transmission determined level input. enable input used disable device that busses effectively isolated. inputs equipped with protection circuits against static discharge transient excess voltage.
Features (Note 1)(Note
High speed: (typ.) power dissipation: (max) 25°C High noise immunity: VNIH VNIL (min) Symmetrical output impedance: |IOH| (min) Capability driving transmission lines. Balanced propagation delays: tpLH tpHL Wide operating voltage range: (opr) function compatible with 74F245/640 Note apply signal terminal when output mode. Damage result.
Weight DIP20-P-300-2.54A SOP20-P-300-1.27A TSSOP20-P-0044-0.65A
1.30 (typ.) 0.22 (typ.) 0.08 (typ.)
Note floating (high impedance) terminals must have their input levels fixed means pull pull down resistors.
TC74AC640 (top view)
TC74AC245 (19) [BA] [AB] (17) (16) (15) (14) (13) (12) (11) (18) (19) TC74AC640 [BA] [AB] (18) (17) (16) (15) (14) (13) (12) (11)
Inputs Function Output
Don't care High impedance
Absolute Maximum Ratings (Note
Characteristics Supply voltage range input voltage output voltage Input diode current Output diode current output current VCC/ground current Power dissipation Storage temperature Symbol VOUT IOUT Tstg Rating -0.5 -0.5 -0.5 ±200 (DIP) (Note 2)/180 (SOP/TSSOP) Unit
Note Exceeding absolute maximum ratings, even briefly, lead deterioration performance even destruction. Using continuously under heavy loads (e.g. application high temperature/current/voltage significant change temperature, etc.) cause this product decrease reliability significantly even operating conditions (i.e. operating temperature/current/voltage, etc.) within absolute maximum ratings operating ranges. Please design appropriate reliability upon reviewing Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/Derating Concept Methods) individual reliability data (i.e. reliability test report estimated failure rate, etc). Note range -40°C 65°C. From 65°C 85°C derating factor mW/°C should applied
Operating Ranges (Note)
Characteristics Supply voltage Input voltage Output voltage Operating temperature Input rise fall time Symbol VOUT Topr dt/dV Rating (VCC (VCC Unit ns/V
operating ranges required ensure normal operation device. Unused inputs inputs must tied either GND. Please connect both inputs outputs with when terminal changes function. this case, please note that output short-circuited.
Test Condition Characteristics Symbol High-level input voltage Low-level input voltage High-level output voltage (Note) Low-level output voltage 3-state output off-state current Input leakage current Quiescent supply current VOUT (Note) 1.50 2.10 3.85 2.58 3.94 25°C Typ. 0.50 0.90 1.65 0.36 0.36 ±0.5 ±0.1 85°C 1.50 2.10 3.85 2.48 3.80 3.85 0.50 0.90 1.65 0.44 0.44 1.65 ±5.0 ±1.0 80.0 Unit
This spec indicates capability driving transmission lines. output should tested time maximum duration.
Characteristics Symbol tpLH tpHL tpLH tpHL tpZL tpZH tpLZ tpHZ CI/O DIR, TC74AC245 Test Condition Propagation delay time (Note Propagation delay time (Note Output enable time 25°C Typ. 10.9 10.0 15.3 10.5 11.4 85°C 12.4 11.4 17.4 12.0 13.0 10.0 Unit
Output disable time Input capacitance input capacitance Power dissipation capacitance
Note defined value internal equivalent capacitance which calculated from operating current consumption without load. Average operating current obtained equation: (opr) (per bit) Note TC74AC245 only Note TC74AC640 only
Weight: 1.30 (typ.)
Weight: 0.22 (typ.)
Weight: 0.08 (typ.)
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