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MM74HCT245MTCX

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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MM74HCT245MTCX

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

MM74HCT245MTCX 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 for all voltages.
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; HIGH isolates the A and B buses.
20 VCC power_in Supply voltage, 4.5 V to 5.5 V recommended operating range.

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
Supply Voltage (VCC) VCC -0.5 7 V 4
DC Input Voltage (VIN) VIN -1.5 V upper limit printed as VCC + 1.5 V 4
DC Output Voltage (VOUT) VOUT -0.5 V upper limit printed as VCC + 0.5 V 4
Clamp Diode Current IIK, IOK -20 20 mA 4
DC Output Current -35 35 mA 4
DC VCC or GND Current, per pin ICC -70 70 mA 4
Storage Temperature Range TSTG -65 150 °C 4
Power Dissipation PD 600 mW Note 3: plastic N package; derate 12 mW/°C from 65°C to 85°C 4
Lead Temperature (soldering 10 s) TL 260 °C soldering 10 seconds 4
Supply Voltage (VCC) VCC 4.5 5.5 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 or Fall Times tr, tf 500 ns 4
Minimum HIGH Level Input Voltage VIH 2 V 4
Maximum LOW Level Input Voltage VIL 0.8 V 4
Minimum HIGH Level Output Voltage VOH 3.98 4.2 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA 25°C 4
Minimum HIGH Level Output Voltage VOH 3.84 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA −40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 3.7 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA −55 to 125°C 4
Minimum HIGH Level Output Voltage VOH 4.98 5.2 V VIN VIH or VIL; /IOUT/ 7.2 mA, VCC 5.5 V; TA 25°C 4
Minimum HIGH Level Output Voltage VOH 4.84 V VIN VIH or VIL; /IOUT/ 7.2 mA, VCC 5.5 V; TA −40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 4.7 V VIN VIH or VIL; /IOUT/ 7.2 mA, VCC 5.5 V; TA −55 to 125°C 4
Maximum LOW Level Output Voltage VOL 0 0.1 V VIN VIH or VIL; /IOUT/ 20 µA, VCC 4
Maximum LOW Level Output Voltage VOL 0.2 0.26 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA 25°C 4
Maximum LOW Level Output Voltage VOL 0.33 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA −40 to 85°C 4
Maximum LOW Level Output Voltage VOL 0.4 V VIN VIH or VIL; /IOUT/ 6.0 mA, VCC 4.5 V; TA −55 to 125°C 4
Maximum Input Current IIN -1 0.1 1 µA VIN VCC or GND, VIH or VIL, Pin 1 or 19 4
Maximum 3-STATE Output Leakage Current IOZ -5 0.5 5 µA VOUT VCC or GND; G VIH 4
Maximum 3-STATE Output Leakage Current IOZ -10 10 µA VOUT VCC or GND; G VIH 4
Maximum Quiescent Supply Current ICC 8 80 µA VIN VCC or GND; IOUT 0 µA 4
Maximum Quiescent Supply Current ICC 160 µA VIN VCC or GND; IOUT 0 µA 4
Maximum Quiescent Supply Current ICC 0.6 1 mA IOUT 0 µA; VIN 2.4 V or 0.5 V (Note 4); TA 25°C 4
Maximum Quiescent Supply Current ICC 1.3 mA IOUT 0 µA; VIN 2.4 V or 0.5 V (Note 4); TA −40 to 85°C 4
Maximum Quiescent Supply Current ICC 1.5 mA IOUT 0 µA; VIN 2.4 V or 0.5 V (Note 4); TA −55 to 125°C 4
Maximum Propagation Delay tPHL, tPLH 16 20 ns VCC 5.0 V; tr, tf 6 ns; CL 45 pF; TA 25°C 5
Maximum Output Enable Time tPZL, tPZH 29 40 ns VCC 5.0 V; tr, tf 6 ns; CL 45 pF; RL 1 kΩ; TA 25°C 5
Maximum Output Disable Time tPLZ, tPHZ 20 25 ns VCC 5.0 V; tr, tf 6 ns; CL 5 pF; RL 1 kΩ; TA 25°C 5
Maximum Propagation Delay tPHL, tPLH 17 23 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA 25°C 5
Maximum Propagation Delay tPHL, tPLH 29 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA −40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 34 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA −55 to 125°C 5
Maximum Propagation Delay tPHL, tPLH 24 30 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 150 pF; TA 25°C 5
Maximum Propagation Delay tPHL, tPLH 38 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 150 pF; TA −40 to 85°C 5
Maximum Propagation Delay tPHL, tPLH 45 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 150 pF; TA −55 to 125°C 5
Maximum Output Enable Time tPZL 31 42 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA 25°C 5
Maximum Output Enable Time tPZL 53 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −40 to 85°C 5
Maximum Output Enable Time tPZL 63 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −55 to 125°C 5
Maximum Output Enable Time tPZH 23 33 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA 25°C 5
Maximum Output Enable Time tPZH 41 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −40 to 85°C 5
Maximum Output Enable Time tPZH 49 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −55 to 125°C 5
Maximum Output Disable Time tPHZ, tPLZ 21 30 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA 25°C 5
Maximum Output Disable Time tPHZ, tPLZ 38 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −40 to 85°C 5
Maximum Output Disable Time tPHZ, tPLZ 45 ns VCC 5.0 V ±10%; tr, tf 6 ns; RL 1 kΩ; CL 50 pF; TA −55 to 125°C 5
Maximum Rise and Fall Time tTHL, tTLH 8 12 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA 25°C 5
Maximum Rise and Fall Time tTHL, tTLH 15 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA −40 to 85°C 5
Maximum Rise and Fall Time tTHL, tTLH 18 ns VCC 5.0 V ±10%; tr, tf 6 ns; CL 50 pF; TA −55 to 125°C 5
Maximum Input Capacitance CIN 10 15 pF 5
Maximum Output/Input Capacitance COUT 20 25 pF 5

CAD (KiCad official)

  • Symbol: MM74HCT245MTCX
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: mm74hct245mtcx-etched.step / mm74hct245mtcx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm74hct245mtcx.step / mm74hct245mtcx.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (10 pp, sha256 fea6b34a9c3d4daa, retrieved 2026-10-22, tier: manufacturer)
  • 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