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SN74LS148DR

Public Made by Adom

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

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Contents

README

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SN74LS148DR

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

SN74LS148DR 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 4 input Active-low data input 4 of the eight priority-encoded data lines.
2 5 input Active-low data input 5 of the eight priority-encoded data lines.
3 6 input Active-low data input 6 of the eight priority-encoded data lines.
4 7 input Active-low data input 7, the highest-priority data line.
5 EI input Enable input for cascading; a high level forces all outputs high and a low level enables encoding.
6 A2 output Active-low address output A2 of the three-line (4-2-1) binary code.
7 A1 output Active-low address output A1 of the three-line (4-2-1) binary code.
8 GND power_in Ground.
9 A0 output Active-low address output A0 of the three-line (4-2-1) binary code.
10 0 input Active-low data input 0, the lowest-priority data line.
11 1 input Active-low data input 1 of the eight priority-encoded data lines.
12 2 input Active-low data input 2 of the eight priority-encoded data lines.
13 3 input Active-low data input 3 of the eight priority-encoded data lines.
14 GS output Active-low group select output that goes low when EI is low and any data input is low.
15 EO output Active-low enable output for cascading that goes low only when EI is low and all data inputs are high.
16 VCC power_in Positive supply voltage.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74LS148DR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: sn74ls148dr-etched.step / sn74ls148dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls148dr.step / sn74ls148dr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 51a9a41a1e0caacc, retrieved 2026-10-07, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (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