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MC74ACT138DTR2G

Public Made by Adom

by adom

onsemi Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MC74ACT138DTR2G

onsemi · Signal Switches, Multiplexers, Decoders · TSSOP-16

MC74ACT138DTR2G from onsemi, in a TSSOP-16. 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 A0 input Address input (LSB) of the three binary-weighted address inputs A0-A2 that select one of eight active-LOW outputs.
2 A1 input Address input of the three binary-weighted address inputs A0-A2 that select one of eight active-LOW outputs.
3 A2 input Address input (MSB) of the three binary-weighted address inputs A0-A2 that select one of eight active-LOW outputs.
4 E1 input Active-LOW enable input; outputs are all HIGH unless E1 and E2 are LOW and E3 is HIGH, and unused enables must be tied permanently to their active state.
5 E2 input Active-LOW enable input; outputs are all HIGH unless E1 and E2 are LOW and E3 is HIGH, and unused enables must be tied permanently to their active state.
6 E3 input Active-HIGH enable input; outputs are all HIGH unless E1 and E2 are LOW and E3 is HIGH, and unused enables must be tied permanently to their active state.
7 O7 output Active-LOW output 7, which sources or sinks 24 mA and is HIGH unless the device is enabled and address 111 is selected.
8 GND power_in Ground pin, the 0 V reference for the device.
9 O6 output Active-LOW output 6, which sources or sinks 24 mA and is LOW only when the device is enabled and address 110 is selected.
10 O5 output Active-LOW output 5, which sources or sinks 24 mA and is LOW only when the device is enabled and address 101 is selected.
11 O4 output Active-LOW output 4, which sources or sinks 24 mA and is LOW only when the device is enabled and address 100 is selected.
12 O3 output Active-LOW output 3, which sources or sinks 24 mA and is LOW only when the device is enabled and address 011 is selected.
13 O2 output Active-LOW output 2, which sources or sinks 24 mA and is LOW only when the device is enabled and address 010 is selected.
14 O1 output Active-LOW output 1, which sources or sinks 24 mA and is LOW only when the device is enabled and address 001 is selected.
15 O0 output Active-LOW output 0, which sources or sinks 24 mA and is LOW only when the device is enabled and address 000 is selected.
16 VCC power_in Positive supply pin; the recommended ACT supply range is 4.5 V to 5.5 V and the absolute maximum is -0.5 V to +7.0 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package TSSOP-16
Category Logic
Pins 16

CAD (KiCad official)

  • Symbol: MC74ACT138DTR2G
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: mc74act138dtr2g-etched.step / mc74act138dtr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc74act138dtr2g.step / mc74act138dtr2g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (10 pp, sha256 4f262d32e351cc56, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (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