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SN74HC244QPWRG4Q1
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74HC244QPWRG4Q1
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
SN74HC244QPWRG4Q1 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 | Active-low output enable for the first 4-bit buffer/driver (1Y1-1Y4); when low the outputs pass the A data, and when high the outputs go to the high-impedance state. |
| 2 | 1A1 | input | Data input to the first buffer/driver; passes noninverted to output 1Y1 while 1OE is low. |
| 3 | 2Y4 | tri_state | Three-state noninverting buffer output of channel 4 in the second 4-bit group; high impedance while 2OE is high. |
| 4 | 1A2 | input | Data input to the first buffer/driver; passes noninverted to output 1Y2 while 1OE is low. |
| 5 | 2Y3 | tri_state | Three-state noninverting buffer output of channel 3 in the second 4-bit group; high impedance while 2OE is high. |
| 6 | 1A3 | input | Data input to the first buffer/driver; passes noninverted to output 1Y3 while 1OE is low. |
| 7 | 2Y2 | tri_state | Three-state noninverting buffer output of channel 2 in the second 4-bit group; high impedance while 2OE is high. |
| 8 | 1A4 | input | Data input to the first buffer/driver; passes noninverted to output 1Y4 while 1OE is low. |
| 9 | 2Y1 | tri_state | Three-state noninverting buffer output of channel 1 in the second 4-bit group; high impedance while 2OE is high. |
| 10 | GND | power_in | Ground reference pin for the device. |
| 11 | 2A1 | input | Data input to the second buffer/driver; passes noninverted to output 2Y1 while 2OE is low. |
| 12 | 1Y4 | tri_state | Three-state noninverting buffer output of channel 4 in the first 4-bit group; high impedance while 1OE is high. |
| 13 | 2A2 | input | Data input to the second buffer/driver; passes noninverted to output 2Y2 while 2OE is low. |
| 14 | 1Y3 | tri_state | Three-state noninverting buffer output of channel 3 in the first 4-bit group; high impedance while 1OE is high. |
| 15 | 2A3 | input | Data input to the second buffer/driver; passes noninverted to output 2Y3 while 2OE is low. |
| 16 | 1Y2 | tri_state | Three-state noninverting buffer output of channel 2 in the first 4-bit group; high impedance while 1OE is high. |
| 17 | 2A4 | input | Data input to the second buffer/driver; passes noninverted to output 2Y4 while 2OE is low. |
| 18 | 1Y1 | tri_state | Three-state noninverting buffer output of channel 1 in the first 4-bit group; high impedance while 1OE is high. |
| 19 | 2OE | input | Active-low output enable for the second 4-bit buffer/driver (2Y1-2Y4); when high the outputs go to the high-impedance state. |
| 20 | VCC | power_in | Supply voltage pin; recommended operating range is 2 V to 6 V, with a 0.1-µF bypass capacitor placed as close to the pin as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC244QPWRG4Q1 - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74hc244qpwrg4q1-etched.step/sn74hc244qpwrg4q1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc244qpwrg4q1.step/sn74hc244qpwrg4q1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (20 pp, sha256
8d5ec541e9e948ca, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).