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SN74LS156DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74LS156DR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOP-16
SN74LS156DR from Texas Instruments, in a SOP-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 | 1C | input | Data input of section 1, which is inverted at the 1Y0-1Y3 outputs. |
| 2 | 1G | input | Active-low strobe (enable) input of section 1. |
| 3 | B | input | Common binary-address input B shared by both sections. |
| 4 | 1Y3 | output | Open-collector output 3 of section 1. |
| 5 | 1Y2 | output | Open-collector output 2 of section 1. |
| 6 | 1Y1 | output | Open-collector output 1 of section 1. |
| 7 | 1Y0 | output | Open-collector output 0 of section 1. |
| 8 | GND | power_in | Ground. |
| 9 | 2Y0 | output | Open-collector output 0 of section 2. |
| 10 | 2Y1 | output | Open-collector output 1 of section 2. |
| 11 | 2Y2 | output | Open-collector output 2 of section 2. |
| 12 | 2Y3 | output | Open-collector output 3 of section 2. |
| 13 | A | input | Common binary-address input A shared by both sections. |
| 14 | 2G | input | Active-low strobe (enable) input of section 2. |
| 15 | 2C | input | Active-low data input of section 2, which is not inverted through its outputs. |
| 16 | VCC | power_in | Positive supply voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74LS156DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ls156dr-etched.step/sn74ls156dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls156dr.step/sn74ls156dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (22 pp, sha256
893a930eaec60d8f, retrieved 2026-10-11, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).