component
SN74HCT157N
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, PDIP-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
markdownSN74HCT157N
Texas Instruments · Signal Switches, Multiplexers, Decoders · PDIP-16
SN74HCT157N from Texas Instruments, in a PDIP-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 | A/B | input | Common select input that chooses the A or B data source for all four output channels (L selects A, H selects B, per the function table). |
| 2 | 1A | input | Channel 1 data input from source A, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 3 | 1B | input | Channel 1 data input from source B, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 4 | 1Y | output | Channel 1 buffered output that follows the selected 1A or 1B input when G is low, and is forced low when G is high. |
| 5 | 2A | input | Channel 2 data input from source A, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 6 | 2B | input | Channel 2 data input from source B, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 7 | 2Y | output | Channel 2 buffered output that follows the selected 2A or 2B input when G is low, and is forced low when G is high. |
| 8 | GND | power_in | Ground reference for the device. |
| 9 | 3Y | output | Channel 3 buffered output that follows the selected 3A or 3B input when G is low, and is forced low when G is high. |
| 10 | 3B | input | Channel 3 data input from source B, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 11 | 3A | input | Channel 3 data input from source A, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 12 | 4Y | output | Channel 4 buffered output that follows the selected 4A or 4B input when G is low, and is forced low when G is high. |
| 13 | 4B | input | Channel 4 data input from source B, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 14 | 4A | input | Channel 4 data input from source A, a TTL-voltage-compatible buffered input with a maximum input current of 1 µA. |
| 15 | G | input | Active-high strobe: when G is high, all outputs are forced low regardless of the select and data inputs. |
| 16 | VCC | power_in | Supply voltage, recommended operating range 4.5 V to 5.5 V (5 V nominal). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74HCT157N - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: PDIP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74hct157n-etched.step/sn74hct157n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hct157n.step/sn74hct157n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (13 pp, sha256
d0065a7dd3156de9, retrieved 2026-10-13, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).