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SN74LVC244AQPWRQ1

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by Ray

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

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Contents

README

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SN74LVC244AQPWRQ1

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

SN74LVC244AQPWRQ1 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 Active-low output enable for the first 4-bit buffer (1Y1-1Y4). Drive low to enable outputs; drive high to place them in the high-impedance (Hi-Z) state.
2 1A1 input Data input for channel 1 of the first 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC, enabling mixed-voltage operation.
3 2Y4 tri_state 3-state buffered output for channel 4 of the second 4-bit buffer. Follows 2A4 when 2OE is low; Hi-Z when 2OE is high. Drive strength up to ±24 mA at VCC = 3 V.
4 1A2 input Data input for channel 2 of the first 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
5 2Y3 tri_state 3-state buffered output for channel 3 of the second 4-bit buffer. Follows 2A3 when 2OE is low; Hi-Z when 2OE is high.
6 1A3 input Data input for channel 3 of the first 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
7 2Y2 tri_state 3-state buffered output for channel 2 of the second 4-bit buffer. Follows 2A2 when 2OE is low; Hi-Z when 2OE is high.
8 1A4 input Data input for channel 4 of the first 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
9 2Y1 tri_state 3-state buffered output for channel 1 of the second 4-bit buffer. Follows 2A1 when 2OE is low; Hi-Z when 2OE is high.
10 GND power_in Ground return. Connect to system 0 V reference.
11 2A1 input Data input for channel 1 of the second 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
12 1Y4 tri_state 3-state buffered output for channel 4 of the first 4-bit buffer. Follows 1A4 when 1OE is low; Hi-Z when 1OE is high.
13 2A2 input Data input for channel 2 of the second 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
14 1Y3 tri_state 3-state buffered output for channel 3 of the first 4-bit buffer. Follows 1A3 when 1OE is low; Hi-Z when 1OE is high.
15 2A3 input Data input for channel 3 of the second 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
16 1Y2 tri_state 3-state buffered output for channel 2 of the first 4-bit buffer. Follows 1A2 when 1OE is low; Hi-Z when 1OE is high.
17 2A4 input Data input for channel 4 of the second 4-bit buffer. Input tolerates up to 5.5 V regardless of VCC.
18 1Y1 tri_state 3-state buffered output for channel 1 of the first 4-bit buffer. Follows 1A1 when 1OE is low; Hi-Z when 1OE is high.
19 2OE input Active-low output enable for the second 4-bit buffer (2Y1-2Y4). Drive low to enable outputs; drive high to place them in the Hi-Z state.
20 VCC power_in Supply voltage, 1.65 V to 3.6 V recommended operating range (absolute max 6.5 V). Bypass with a local decoupling capacitor to GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SN74LVC244AQPWRQ1
  • SN74LVC244AQPWRQ1DW
  • SN74LVC244AQPWRQ1DWR
  • SN74LVC244AQPWRQ1DGS
  • SN74LVC244AQPWRQ1DGSR
  • SN74LVC244AQPWRQ1RKS
  • SN74LVC244AQPWRQ1RKSR

CAD (KiCad official)

  • Symbol: SN74LVC244AQPWRQ1
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (30 pp, sha256 5f9fbcc213abb015, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF