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MC74AC157DR2G

Public Made by Adom

by adom

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

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MC74AC157DR2G

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

MC74AC157DR2G from onsemi, in a SOIC-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 S input Common Select input that chooses between the I0 sources (S LOW) and the I1 sources (S HIGH) for all four outputs.
2 I0a input Source 0 data input for multiplexer channel a, passed to Za when E is LOW and S is LOW.
3 I1a input Source 1 data input for multiplexer channel a, passed to Za when E is LOW and S is HIGH.
4 Za output Channel a output presenting the selected data in true (non-inverted) form, forced LOW when E is HIGH, with 24 mA source/sink capability.
5 I0b input Source 0 data input for multiplexer channel b, passed to Zb when E is LOW and S is LOW.
6 I1b input Source 1 data input for multiplexer channel b, passed to Zb when E is LOW and S is HIGH.
7 Zb output Channel b output presenting the selected data in true (non-inverted) form, forced LOW when E is HIGH, with 24 mA source/sink capability.
8 GND power_in Ground reference (0 V) for the device.
9 Zd output Channel d output presenting the selected data in true (non-inverted) form, forced LOW when E is HIGH, with 24 mA source/sink capability.
10 I1d input Source 1 data input for multiplexer channel d, passed to Zd when E is LOW and S is HIGH.
11 I0d input Source 0 data input for multiplexer channel d, passed to Zd when E is LOW and S is LOW.
12 Zc output Channel c output presenting the selected data in true (non-inverted) form, forced LOW when E is HIGH, with 24 mA source/sink capability.
13 I1c input Source 1 data input for multiplexer channel c, passed to Zc when E is LOW and S is HIGH.
14 I0c input Source 0 data input for multiplexer channel c, passed to Zc when E is LOW and S is LOW.
15 E input Active-LOW Enable input; when E is HIGH all four outputs Z are forced LOW regardless of the other inputs.
16 VCC power_in Positive supply voltage, 2.0 V to 6.0 V recommended for AC and 4.5 V to 5.5 V for ACT, with an absolute maximum of -0.5 V to +7.0 V.

Key specifications

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

CAD (KiCad official)

  • Symbol: MC74AC157DR2G
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: mc74ac157dr2g-etched.step / mc74ac157dr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc74ac157dr2g.step / mc74ac157dr2g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (9 pp, sha256 f7e74d0c50731c2e, retrieved 2026-10-21, 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