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SN74AHCT244PWR

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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SN74AHCT244PWR

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

SN74AHCT244PWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1OE input Output Enable for buffer 1; when low, A inputs pass to Y outputs; when high, outputs are high-impedance.
2 1A1 input Input A1 to buffer 1; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
3 2Y4 tri_state 3-state output Y4 from buffer 2; high-impedance when 2OE is high.
4 1A2 input Input A2 to buffer 1; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
5 2Y3 tri_state 3-state output Y3 from buffer 2; high-impedance when 2OE is high.
6 1A3 input Input A3 to buffer 1; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
7 2Y2 tri_state 3-state output Y2 from buffer 2; high-impedance when 2OE is high.
8 1A4 input Input A4 to buffer 1; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
9 2Y1 tri_state 3-state output Y1 from buffer 2; high-impedance when 2OE is high.
10 GND power_in Ground reference pin.
11 2A1 input Input A1 to buffer 2; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
12 1Y4 tri_state 3-state output Y4 from buffer 1; high-impedance when 1OE is high.
13 2A2 input Input A2 to buffer 2; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
14 1Y3 tri_state 3-state output Y3 from buffer 1; high-impedance when 1OE is high.
15 2A3 input Input A3 to buffer 2; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
16 1Y2 tri_state 3-state output Y2 from buffer 1; high-impedance when 1OE is high.
17 2A4 input Input A4 to buffer 2; accepts TTL inputs with VIH ≥ 2 V and VIL ≤ 0.8 V.
18 1Y1 tri_state 3-state output Y1 from buffer 1; high-impedance when 1OE is high.
19 2OE input Output Enable for buffer 2; when low, A inputs pass to Y outputs; when high, outputs are high-impedance.
20 VCC power_out Power supply pin; supply voltage 4.5 V to 5.5 V nominal.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74AHCT244PWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74ahct244pwr-etched.step / sn74ahct244pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahct244pwr.step / sn74ahct244pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (42 pp, sha256 23be049aaa49559a, retrieved 2026-09-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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