Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

Generated by kicad-footprint-generator · KiCad file format 20260206

Name	Last commit message	Last updated
docs	Publish 0.1.0 · Ray	1d ago
viewers	sn74als139dr: viewers · Ray	1d ago
package.json	Publish 0.1.0 · Ray	1d ago
page.json	Set visibility: public · Ray	1d ago
README.md	Initial commit: component/sn74als139dr · Ray	1d ago
sn74als139dr-etched.glb	sn74als139dr: factory component page (tier=mfr) · Ray	1d ago
sn74als139dr-etched.step	sn74als139dr: factory component page (tier=mfr) · Ray	1d ago
sn74als139dr-hero.glb	sn74als139dr: hero GLB from the etched model (keeps the MPN mark) · Ray	1d ago
sn74als139dr-hero.overlay.json	Publish 0.1.0 · Ray	1d ago
sn74als139dr.glb	Publish 0.1.0 · Ray	1d ago
sn74als139dr.kicad_mod	Publish 0.1.0 · Ray	1d ago
sn74als139dr.kicad_sym	Publish 0.1.0 · Ray	1d ago
sn74als139dr.lbr	Publish 0.1.0 · Ray	1d ago
sn74als139dr.step	Publish 0.1.0 · Ray	1d ago

SN74ALS139DR

Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16

SN74ALS139DR from Texas Instruments, 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	1G	input	Active-low enable for decoder 1; when it is high, all outputs 1Y0 to 1Y3 are high regardless of the select inputs.
2	1A	input	Select input A (least significant bit) for decoder 1; fully buffered, presenting one normalized load to its driver and Schottky-clamped.
3	1B	input	Select input B (most significant bit) for decoder 1; fully buffered, presenting one normalized load to its driver and Schottky-clamped.
4	1Y0	output	Active-low output 0 of decoder 1; goes low when 1G is low and B, A are both low.
5	1Y1	output	Active-low output 1 of decoder 1; goes low when 1G is low and A is high with B low.
6	1Y2	output	Active-low output 2 of decoder 1; goes low when 1G is low and B is high with A low.
7	1Y3	output	Active-low output 3 of decoder 1; goes low when 1G is low and B, A are both high.
8	GND	power_in	Ground reference for the device.
9	2Y3	output	Active-low output 3 of decoder 2; goes low when 2G is low and B, A are both high.
10	2Y2	output	Active-low output 2 of decoder 2; goes low when 2G is low and B is high with A low.
11	2Y1	output	Active-low output 1 of decoder 2; goes low when 2G is low and A is high with B low.
12	2Y0	output	Active-low output 0 of decoder 2; goes low when 2G is low and B, A are both low.
13	2B	input	Select input B (most significant bit) for decoder 2; fully buffered, presenting one normalized load to its driver and Schottky-clamped.
14	2A	input	Select input A (least significant bit) for decoder 2; fully buffered, presenting one normalized load to its driver and Schottky-clamped.
15	2G	input	Active-low enable for decoder 2; when it is high, all outputs 2Y0 to 2Y3 are high regardless of the select inputs.
16	VCC	power_in	Supply voltage, 4.5 V to 5.5 V recommended (5 V nominal); absolute maximum rating is 7 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Logic
Pins	16

CAD (KiCad official)

Symbol: SN74ALS139DR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)
3D model files: sn74als139dr-etched.step / sn74als139dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74als139dr.step / sn74als139dr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (17 pp, sha256 60dc2c1d0468b164, retrieved 2026-10-08, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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