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SN74ACT244IPWRG4Q1

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74ACT244IPWRG4Q1

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

SN74ACT244IPWRG4Q1 from Texas Instruments, in a TSSOP-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 1OE input Output Enable 1 (active low): when low, buffer 1 passes noninverted 1A data to the 1Y outputs, and when high the 1Y outputs go to high impedance.
2 1A1 input Data input 1A1 of buffer 1, which must stay between GND and VCC and must not be left floating when unused.
3 2Y4 output Three-state output 2Y4 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
4 1A2 input Data input 1A2 of buffer 1, which must stay between GND and VCC and must not be left floating when unused.
5 2Y3 output Three-state output 2Y3 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
6 1A3 input Data input 1A3 of buffer 1, which must stay between GND and VCC and must not be left floating when unused.
7 2Y2 output Three-state output 2Y2 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
8 1A4 input Data input 1A4 of buffer 1, which must stay between GND and VCC and must not be left floating when unused.
9 2Y1 output Three-state output 2Y1 of buffer 2, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
10 GND power_in Ground pin for the device.
11 2A1 input Data input 2A1 of buffer 2, which must stay between GND and VCC and must not be left floating when unused.
12 1Y4 output Three-state output 1Y4 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
13 2A2 input Data input 2A2 of buffer 2, which must stay between GND and VCC and must not be left floating when unused.
14 1Y3 output Three-state output 1Y3 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
15 2A3 input Data input 2A3 of buffer 2, which must stay between GND and VCC and must not be left floating when unused.
16 1Y2 output Three-state output 1Y2 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
17 2A4 input Data input 2A4 of buffer 2, which must stay between GND and VCC and must not be left floating when unused.
18 1Y1 output Three-state output 1Y1 of buffer 1, rated for IOH of -24 mA and IOL of 24 mA under the recommended operating conditions.
19 2OE input Output Enable 2 (active low): when low, buffer 2 passes noninverted 2A data to the 2Y outputs, and when high the 2Y outputs go to high impedance.
20 VCC power_in Supply pin; the device operates from 4.5 V to 5.5 V VCC per the recommended operating conditions.

Key specifications

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

CAD (KiCad official)

  • Symbol: SN74ACT244IPWRG4Q1
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74act244ipwrg4q1-etched.step / sn74act244ipwrg4q1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74act244ipwrg4q1.step / sn74act244ipwrg4q1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (22 pp, sha256 d751609ed06763df, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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