component
SN74LVC257ADR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-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
markdownSN74LVC257ADR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16
SN74LVC257ADR 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 | A/B | input | Select pin: low selects A inputs, high selects B inputs |
| 2 | 1A | input | Multiplexer channel 1 signal input A |
| 3 | 1B | input | Multiplexer channel 1 signal input B |
| 4 | 1Y | tri_state | Multiplexer channel 1 output with 3-state control, high impedance when OE is high |
| 5 | 2A | input | Multiplexer channel 2 signal input A |
| 6 | 2B | input | Multiplexer channel 2 signal input B |
| 7 | 2Y | tri_state | Multiplexer channel 2 output with 3-state control, high impedance when OE is high |
| 8 | GND | power_in | Ground reference (0V) |
| 9 | 3Y | tri_state | Multiplexer channel 3 output with 3-state control, high impedance when OE is high |
| 10 | 3B | input | Multiplexer channel 3 signal input B |
| 11 | 3A | input | Multiplexer channel 3 signal input A |
| 12 | 4Y | tri_state | Multiplexer channel 4 output with 3-state control, high impedance when OE is high |
| 13 | 4B | input | Multiplexer channel 4 signal input B |
| 14 | 4A | input | Multiplexer channel 4 signal input A |
| 15 | OE | input | Active-low output enable: low enables outputs, high forces outputs to high impedance |
| 16 | VCC | power_in | Positive power supply pin, operating range 1.65V to 3.6V |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74LVC257ADR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74lvc257adr-etched.step/sn74lvc257adr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74lvc257adr.step/sn74lvc257adr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (39 pp, sha256
d18bc716bc335870, retrieved 2026-10-03, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).