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SN74HCS27DR

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by Ray

Texas Instruments Logic Gates, SOIC-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SN74HCS27DR

Texas Instruments · Logic Gates · SOIC-14

SN74HCS27DR from Texas Instruments, in a SOIC-14. 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 1A input Channel 1, Input A. Schmitt-trigger CMOS logic input to gate 1 of the NOR array. Recommended input voltage 0 V to VCC; typical positive switching threshold ~3.15 V and negative threshold ~2.2 V at VCC = 4.5 V.
2 1B input Channel 1, Input B. Schmitt-trigger CMOS logic input to gate 1. Input leakage typical ±100 nA (±1000 nA max) at VCC = 6 V.
3 2A input Channel 2, Input A. Schmitt-trigger CMOS logic input to gate 2 of the NOR array. Accepts 0 V to VCC.
4 2B input Channel 2, Input B. Schmitt-trigger CMOS logic input to gate 2.
5 2C input Channel 2, Input C. Schmitt-trigger CMOS logic input to gate 2.
6 2Y output Channel 2 output. CMOS push-pull output driving Y = NOR(2A, 2B, 2C). Typical drive ±7.8 mA at VCC = 5 V; VOH ≥ VCC - 0.1 V at IOH = -20 µA.
7 GND power_in Ground reference (0 V) for the device. Return path for supply current; continuous current through VCC or GND rated ±70 mA absolute maximum.
8 3Y output Channel 3 output. CMOS push-pull output driving Y = NOR(3A, 3B, 3C). Typical drive ±7.8 mA at VCC = 5 V.
9 3A input Channel 3, Input A. Schmitt-trigger CMOS logic input to gate 3.
10 3B input Channel 3, Input B. Schmitt-trigger CMOS logic input to gate 3.
11 3C input Channel 3, Input C. Schmitt-trigger CMOS logic input to gate 3.
12 1Y output Channel 1 output. CMOS push-pull output driving Y = NOR(1A, 1B, 1C). Typical drive ±7.8 mA at VCC = 5 V.
13 1C input Channel 1, Input C. Schmitt-trigger CMOS logic input to gate 1.
14 VCC power_in Positive supply voltage. Recommended operating range 2 V to 6 V (absolute max 7 V). Decouple with a local 100 nF ceramic close to the pin. Typical quiescent ICC of 100 nA (2 µA max at VCC = 6 V).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-14
Category Logic
Pins 14

Ordering variants

Same part, different packaging or reel option.

  • SN74HCS27DR
  • SN74HCS27DRD
  • SN74HCS27DRPWR
  • SN74HCS27DRPW

CAD (KiCad official)

  • Symbol: SN74HCS27DR
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (None pp, sha256 b01d988783bf2ba0, 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