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SN74HC32 Quad OR Gate

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by Ray

Quad 2-input OR gate in the 74HC CMOS family.

logicor-gate74hccmostisoic-14
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SN74HC32

Texas Instruments · Logic Gate · SOIC-14

The SN74HC32 contains four independent 2-input OR gates in the 74HC CMOS logic family. Each output goes high when either input is high, useful for combining interrupt or status lines and general glue logic.

Pinout

Pin Name Type Function
1 1A input Channel 1, Input A. Logic input for the first 2-input OR gate. VIH >= 4.2 V and VIL <= 1.8 V at VCC = 6 V.
2 1B input Channel 1, Input B. Second logic input for OR gate 1. Buffered CMOS input; VIH/VIL scale with VCC per Recommended Operating Conditions.
3 1Y output Channel 1, Output Y. 1Y = 1A + 1B. Drives up to 10 LSTTL loads; VOH >= 5.48 V and VOL <= 0.33 V at VCC = 6 V.
4 2A input Channel 2, Input A. Logic input for the second 2-input OR gate.
5 2B input Channel 2, Input B. Second logic input for OR gate 2.
6 2Y output Channel 2, Output Y. 2Y = 2A + 2B.
7 GND power_in Ground reference (0 V) for the device. Connect to system ground with a low-inductance return.
8 3Y output Channel 3, Output Y. 3Y = 3A + 3B.
9 3A input Channel 3, Input A. Logic input for the third 2-input OR gate.
10 3B input Channel 3, Input B. Second logic input for OR gate 3.
11 4Y output Channel 4, Output Y. 4Y = 4A + 4B.
12 4A input Channel 4, Input A. Logic input for the fourth 2-input OR gate.
13 4B input Channel 4, Input B. Second logic input for OR gate 4.
14 VCC power_in Positive supply. Operating range 2 V to 6 V (5 V nominal); absolute maximum 7 V. Bypass with a 0.1 uF ceramic capacitor to GND close to the pin.

Key specifications

Parameter Value
Type Quad 2-input OR gate
Logic family 74HC (CMOS)
Supply voltage 2 V to 6 V
Output current +-5.2 mA at VCC = 4.5 V
Propagation delay 9 ns typ at 5 V
Operating temperature -40 C to 85 C

Ordering variants

Same part, different packaging or reel option.

  • SN74HC32D
  • SN74HC32DB
  • SN74HC32N
  • SN74HC32NS
  • SN74HC32PW
  • SN74HC32J
  • SN74HC32W
  • SN74HC32FK

CAD (KiCad official)

  • Symbol: sn74hc32.kicad_sym
  • Footprint: sn74hc32.kicad_mod
  • 3D model: SOIC-14 body from KiCad Package_SO/SOIC-14_3.9x8.7mm_P1.27mm.

Provenance

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

  • Datasheet: Texas Instruments datasheet (38 pp, sha256 f64e03a2a4c72baf, 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