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MM74HC245AMTC

Public Made by Adom

by adom

onsemi Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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MM74HC245AMTC

onsemi · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

MM74HC245AMTC from onsemi, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 DIR input Direction control input: HIGH sends data from A to B, LOW sends data from B to A.
2 A1 bidirectional A-bus data input/output 1, 3-STATE.
3 A2 bidirectional A-bus data input/output 2, 3-STATE.
4 A3 bidirectional A-bus data input/output 3, 3-STATE.
5 A4 bidirectional A-bus data input/output 4, 3-STATE.
6 A5 bidirectional A-bus data input/output 5, 3-STATE.
7 A6 bidirectional A-bus data input/output 6, 3-STATE.
8 A7 bidirectional A-bus data input/output 7, 3-STATE.
9 A8 bidirectional A-bus data input/output 8, 3-STATE.
10 GND power_in Ground, 0 V reference.
11 B8 bidirectional B-bus data input/output 8, 3-STATE.
12 B7 bidirectional B-bus data input/output 7, 3-STATE.
13 B6 bidirectional B-bus data input/output 6, 3-STATE.
14 B5 bidirectional B-bus data input/output 5, 3-STATE.
15 B4 bidirectional B-bus data input/output 4, 3-STATE.
16 B3 bidirectional B-bus data input/output 3, 3-STATE.
17 B2 bidirectional B-bus data input/output 2, 3-STATE.
18 B1 bidirectional B-bus data input/output 1, 3-STATE.
19 G input Active-LOW enable input; when HIGH the A and B buses are isolated.
20 VCC power_in Positive supply voltage, recommended 2 to 6 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package TSSOP-20
Category Logic
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Minimum HIGH Level Input Voltage VIH 1.5 V VCC 2.0V; guaranteed limit at TA -40 to 85°C 4
Minimum HIGH Level Input Voltage VIH 3.15 V VCC 4.5V; guaranteed limit at TA -40 to 85°C 4
Minimum HIGH Level Input Voltage VIH 4.2 V VCC 6.0V; guaranteed limit at TA -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 0.5 V VCC 2.0V; guaranteed limit at TA -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 1.35 V VCC 4.5V; guaranteed limit at TA -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 1.8 V VCC 6.0V; guaranteed limit at TA -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 1.9 2 V VIN VIH or VIL; /IOUT/ ≤ 20 µA; VCC 2.0V 4
Minimum HIGH Level Output Voltage VOH 4.4 4.5 V VIN VIH or VIL; /IOUT/ ≤ 20 µA; VCC 4.5V 4
Minimum HIGH Level Output Voltage VOH 5.9 6 V VIN VIH or VIL; /IOUT/ ≤ 20 µA; VCC 6.0V 4
Minimum HIGH Level Output Voltage VOH 3.84 4.2 V VIN VIH or VIL; /IOUT/ ≤ 6.0 mA; VCC 4.5V 4
Minimum HIGH Level Output Voltage VOH 5.34 5.7 V VIN VIH or VIL; /IOUT/ ≤ 7.8 mA; VCC 6.0V 4
Maximum LOW Level Output Voltage VOL 0 0.1 V VIN VIH or VIL; /IOUT/ ≤ 20 µA; VCC 2.0V 4
Maximum LOW Level Output Voltage VOL 0.2 0.33 V VIN VIH or VIL; /IOUT/ ≤ 6.0 mA; VCC 4.5V 4
Input Leakage Current (G and DIR) IIN -1 1 µA VIN VCC to GND; VCC 6.0V; guaranteed limit at TA -40 to 85°C 4
Maximum 3-STATE Output Leakage Current IOZ -5 5 µA VOUT VCC or GND; enable G VIH; VCC 6.0V; guaranteed limit at TA -40 to 85°C 4
Maximum Quiescent Supply Current ICC 80 µA VIN VCC or GND; IOUT 0 µA; VCC 6.0V; guaranteed limit at TA -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 12 17 ns VCC 5 V; TA 25°C; CL 45 pF; tr tf 6 ns 5
Maximum Output Enable Time tPZH, tPZL 24 35 ns VCC 5 V; TA 25°C; RL 1 kΩ; CL 45 pF 5
Maximum Output Disable Time tPHZ, tPLZ 18 25 ns VCC 5 V; TA 25°C; RL 1 kΩ; CL 5 pF 5
Maximum Propagation Delay tPHL, tPLH 31 113 ns VCC 2.0V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 41 116 ns VCC 2.0V; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 13 23 ns VCC 4.5V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 17 28 ns VCC 4.5V; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 11 19 ns VCC 6.0V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 14 23 ns VCC 6.0V; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 71 240 ns VCC 2.0V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 81 300 ns VCC 2.0V; RL 1 kΩ; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 26 48 ns VCC 4.5V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 31 60 ns VCC 4.5V; RL 1 kΩ; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 21 41 ns VCC 6.0V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Enable Time tPZH, tPZL 25 51 ns VCC 6.0V; RL 1 kΩ; CL 150 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Disable Time tPHZ, tPLZ 39 169 ns VCC 2.0V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Disable Time tPHZ, tPLZ 20 34 ns VCC 4.5V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Output Disable Time tPHZ, tPLZ 18 29 ns VCC 6.0V; RL 1 kΩ; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Output Rise and Fall Time tTLH, tTHL 20 75 ns VCC 2.0V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Output Rise and Fall Time tTLH, tTHL 6 15 ns VCC 4.5V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Output Rise and Fall Time tTLH, tTHL 5 13 ns VCC 6.0V; CL 50 pF; guaranteed limit at TA -40 to 85°C 5
Maximum Input Capacitance CIN 5 10 pF guaranteed limit at TA -40 to 85°C 5
Maximum Input/Output Capacitance, A or B CIN/OUT 15 20 pF guaranteed limit at TA -40 to 85°C 5
Supply Voltage VCC -0.5 7 V Voltages referenced to ground 4
DC Input Voltage DIR and G pins VIN -1.5 V upper limit printed as VCC + 1.5 V 4
DC Input/Output Voltage VIN, VOUT -0.5 V upper limit printed as VCC + 0.5 V 4
Clamp Diode Current ICD -20 20 mA 4
DC Output Current, per pin IOUT -35 35 mA per pin 4
DC VCC or GND Current, per pin ICC -70 70 mA per pin 4
Storage Temperature Range TSTG -65 150 °C 4
Power Dissipation PD 600 mW Note 3 4
Lead Temperature TL 260 °C soldering 10 seconds 4
Supply Voltage VCC 2 6 V 4
DC Input or Output Voltage VIN, VOUT 0 V upper limit printed as VCC 4
Operating Temperature Range TA -40 85 °C 4
Input Rise/Fall Time tr, tf 1000 ns VCC 2.0V 4
Input Rise/Fall Time tr, tf 500 ns VCC 4.5V 4
Input Rise/Fall Time tr, tf 400 ns VCC 6.0V 4

CAD (KiCad official)

  • Symbol: MM74HC245AMTC
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: mm74hc245amtc-etched.step / mm74hc245amtc-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm74hc245amtc.step / mm74hc245amtc.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (10 pp, sha256 fb8809e7c4582fe9, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF