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SN74LS145N

Public Made by Adom

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

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SN74LS145N

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

SN74LS145N 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 0 output Active-low open-collector output 0, low (on) for BCD input 0000, sinks up to 80 mA.
2 1 output Active-low open-collector output 1, low (on) for BCD input 0001, sinks up to 80 mA.
3 2 output Active-low open-collector output 2, low (on) for BCD input 0010, sinks up to 80 mA.
4 3 output Active-low open-collector output 3, low (on) for BCD input 0011, sinks up to 80 mA.
5 4 output Active-low open-collector output 4, low (on) for BCD input 0100, sinks up to 80 mA.
6 5 output Active-low open-collector output 5, low (on) for BCD input 0101, sinks up to 80 mA.
7 6 output Active-low open-collector output 6, low (on) for BCD input 0110, sinks up to 80 mA.
8 GND power_in Ground terminal, reference for all voltage values.
9 7 output Active-low open-collector output 7, low (on) for BCD input 0111, sinks up to 80 mA.
10 8 output Active-low open-collector output 8, low (on) for BCD input 1000, sinks up to 80 mA.
11 9 output Active-low open-collector output 9, low (on) for BCD input 1001, sinks up to 80 mA.
12 D input BCD input D (most significant bit), one standard LS load.
13 C input BCD input C, one standard LS load.
14 B input BCD input B, one standard LS load.
15 A input BCD input A (least significant bit), one standard LS load.
16 VCC power_in Supply voltage pin, 4.75 V to 5.25 V recommended for SN74 parts, 7 V absolute maximum.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74LS145N
  • Footprint: Package_DIP:DIP-16_W7.62mm
  • 3D model: PDIP-16 (KiCad packages3D, STEP)
  • 3D model files: sn74ls145n-etched.step / sn74ls145n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls145n.step / sn74ls145n.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (18 pp, sha256 a973c320238235be, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+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