component
SN74HC244NSR
Public Made by Adomby adom
Texas Instruments Buffer/Driver/Transceiver, SOIC-20-208mil. Pinout extracted from 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
markdownSN74HC244NSR
Texas Instruments · Buffer/Driver/Transceiver · SOIC-20-208mil
SN74HC244NSR 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 | 1OE | input | Active-low output-enable for group 1 (Y1..Y4). When 1OE = L, 1Y outputs follow 1A inputs; when 1OE = H, 1Y outputs are high-impedance. |
| 2 | 1A1 | input | Group-1 buffer input, channel 1. CMOS input, VIH = 3.15 V at VCC = 4.5 V, II = ±1 µA max. |
| 3 | 2Y4 | tri_state | Group-2 buffer output, channel 4. 3-state, non-inverted copy of 2A4 when 2OE = L; Hi-Z when 2OE = H. Drive ±6 mA at VCC = 5 V. |
| 4 | 1A2 | input | Group-1 buffer input, channel 2. |
| 5 | 2Y3 | tri_state | Group-2 buffer output, channel 3. 3-state, non-inverted copy of 2A3 when 2OE = L. |
| 6 | 1A3 | input | Group-1 buffer input, channel 3. |
| 7 | 2Y2 | tri_state | Group-2 buffer output, channel 2. 3-state, non-inverted copy of 2A2 when 2OE = L. |
| 8 | 1A4 | input | Group-1 buffer input, channel 4. |
| 9 | 2Y1 | tri_state | Group-2 buffer output, channel 1. 3-state, non-inverted copy of 2A1 when 2OE = L. |
| 10 | GND | power_in | Ground reference (0 V). |
| 11 | 2A1 | input | Group-2 buffer input, channel 1. |
| 12 | 1Y4 | tri_state | Group-1 buffer output, channel 4. 3-state, non-inverted copy of 1A4 when 1OE = L. |
| 13 | 2A2 | input | Group-2 buffer input, channel 2. |
| 14 | 1Y3 | tri_state | Group-1 buffer output, channel 3. 3-state, non-inverted copy of 1A3 when 1OE = L. |
| 15 | 2A3 | input | Group-2 buffer input, channel 3. |
| 16 | 1Y2 | tri_state | Group-1 buffer output, channel 2. 3-state, non-inverted copy of 1A2 when 1OE = L. |
| 17 | 2A4 | input | Group-2 buffer input, channel 4. |
| 18 | 1Y1 | tri_state | Group-1 buffer output, channel 1. 3-state, non-inverted copy of 1A1 when 1OE = L. |
| 19 | 2OE | input | Active-low output-enable for group 2 (Y1..Y4). When 2OE = L, 2Y outputs follow 2A inputs; when 2OE = H, 2Y outputs are high-impedance. |
| 20 | VCC | power_in | Supply voltage, 2 V to 6 V recommended. ICC = 80 µA max at 25 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-208mil |
| Category | Logic |
| Pins | 20 |
Ordering variants
Same part, different packaging or reel option.
SN74HC244NSRSN74HC244NSRE4SN74HC244NSRG4SN74HC244NSRNSG4SN74HC244NSRDWSN74HC244NSRDWRSN74HC244NSRDWE4SN74HC244NSRDWG4SN74HC244NSRDWRE4SN74HC244NSRDWRG4SN74HC244NSRNSN74HC244NSRNE4SN74HC244NSRDBRSN74HC244NSRDBRE4SN74HC244NSRPWSN74HC244NSRPWRSN74HC244NSRPWTSN74HC244NSRPWE4SN74HC244NSRPWRE4SN74HC244NSRPWTE4SN74HC244NSRJSN74HC244NSRWSN74HC244NSRFK
CAD (KiCad official)
- Symbol:
SN74HC244NSR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-208mil (KiCad packages3D, STEP)
- 3D model files:
sn74hc244nsr-etched.step/sn74hc244nsr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc244nsr.step/sn74hc244nsr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (16 pp, sha256
b671bc5179b50206, retrieved 2026-08-17, tier: manufacturer) - 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).