component
SN74LS244NSR
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-20-208mil. Datasheet-verified pinout, 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
markdownSN74LS244NSR
Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SOIC-20-208mil
SN74LS244NSR from Texas Instruments, in a SOIC-20-208mil. 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 | 1G | input | Channel 1 output enable input, active-low; when low, data from 1A1-1A4 inputs passes to 1Y1-1Y4 outputs; when high, 1Y outputs are in high impedance state. |
| 2 | 1A1 | input | Channel 1 data input, bit 1 (A side); connects to 1Y1 when 1G is low. |
| 3 | 2Y4 | tri_state | Channel 2 data output, bit 4 (Y side); tri-state output controlled by 2G; passes data from 2A4 when 2G is low. |
| 4 | 1A2 | input | Channel 1 data input, bit 2 (A side); connects to 1Y2 when 1G is low. |
| 5 | 2Y3 | tri_state | Channel 2 data output, bit 3 (Y side); tri-state output controlled by 2G; passes data from 2A3 when 2G is low. |
| 6 | 1A3 | input | Channel 1 data input, bit 3 (A side); connects to 1Y3 when 1G is low. |
| 7 | 2Y2 | tri_state | Channel 2 data output, bit 2 (Y side); tri-state output controlled by 2G; passes data from 2A2 when 2G is low. |
| 8 | 1A4 | input | Channel 1 data input, bit 4 (A side); connects to 1Y4 when 1G is low. |
| 9 | 2Y1 | tri_state | Channel 2 data output, bit 1 (Y side); tri-state output controlled by 2G; passes data from 2A1 when 2G is low. |
| 10 | GND | power_in | Ground; negative power supply and circuit common reference. |
| 11 | 2A1 | input | Channel 2 data input, bit 1 (A side); connects to 2Y1 when 2G is low. |
| 12 | 1Y4 | tri_state | Channel 1 data output, bit 4 (Y side); tri-state output controlled by 1G; passes data from 1A4 when 1G is low. |
| 13 | 2A2 | input | Channel 2 data input, bit 2 (A side); connects to 2Y2 when 2G is low. |
| 14 | 1Y3 | tri_state | Channel 1 data output, bit 3 (Y side); tri-state output controlled by 1G; passes data from 1A3 when 1G is low. |
| 15 | 2A3 | input | Channel 2 data input, bit 3 (A side); connects to 2Y3 when 2G is low. |
| 16 | 1Y2 | tri_state | Channel 1 data output, bit 2 (Y side); tri-state output controlled by 1G; passes data from 1A2 when 1G is low. |
| 17 | 2A4 | input | Channel 2 data input, bit 4 (A side); connects to 2Y4 when 2G is low. |
| 18 | 1Y1 | tri_state | Channel 1 data output, bit 1 (Y side); tri-state output controlled by 1G; passes data from 1A1 when 1G is low. |
| 19 | 2G | input | Channel 2 output enable input, active-low; when low, data from 2A1-2A4 inputs passes to 2Y1-2Y4 outputs; when high, 2Y outputs are in high impedance state. |
| 20 | VCC | power_in | Positive power supply; connect to 4.75V to 5.25V for SN74LS244. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-208mil |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74LS244NSR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-208mil (KiCad packages3D, STEP)
- 3D model files:
sn74ls244nsr-etched.step/sn74ls244nsr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls244nsr.step/sn74ls244nsr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
05f3258985319fe3, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).