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SN74HC244NSR

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by Ray

Texas Instruments Buffer/Driver/Transceiver, SOIC-20-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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SN74HC244NSR

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.

  • SN74HC244NSR
  • SN74HC244NSRE4
  • SN74HC244NSRG4
  • SN74HC244NSRNSG4
  • SN74HC244NSRDW
  • SN74HC244NSRDWR
  • SN74HC244NSRDWE4
  • SN74HC244NSRDWG4
  • SN74HC244NSRDWRE4
  • SN74HC244NSRDWRG4
  • SN74HC244NSRN
  • SN74HC244NSRNE4
  • SN74HC244NSRDBR
  • SN74HC244NSRDBRE4
  • SN74HC244NSRPW
  • SN74HC244NSRPWR
  • SN74HC244NSRPWT
  • SN74HC244NSRPWE4
  • SN74HC244NSRPWRE4
  • SN74HC244NSRPWTE4
  • SN74HC244NSRJ
  • SN74HC244NSRW
  • SN74HC244NSRFK

CAD (KiCad official)

  • Symbol: SN74HC244NSR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-208mil (KiCad packages3D, STEP)

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).

Datasheet PDF