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SN74LS244N

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · DIP-20

SN74LS244N from Texas Instruments, in a DIP-20. 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 1G input Channel 1 output enable
2 1A1 input Channel 1, A side 1
3 2Y4 tri_state Channel 2, Y side 4
4 1A2 input Channel 1, A side 2
5 2Y3 tri_state Channel 2, Y side 3
6 1A3 input Channel 1, A side 3
7 2Y2 tri_state Channel 2, Y side 2
8 1A4 input Channel 1, A side 4
9 2Y1 tri_state Channel 2, Y side 1
10 GND power_in Ground
11 2A1 input Channel 2, A side 1
12 1Y4 tri_state Channel 1, Y side 4
13 2A2 input Channel 2, A side 2
14 1Y3 tri_state Channel 1, Y side 3
15 2A3 input Channel 2, A side 3
16 1Y2 tri_state Channel 1, Y side 2
17 2A4 input Channel 2, A side 4
18 1Y1 tri_state Channel 1, Y side 1
19 2G/2G input Channel 2 output enable
20 VCC power_in Power supply

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package DIP-20
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74LS244N
  • Footprint: Package_DIP:DIP-20_W7.62mm
  • 3D model: DIP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74ls244n-etched.step / sn74ls244n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls244n.step / sn74ls244n.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (42 pp, sha256 05f3258985319fe3, retrieved 2026-10-05, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF