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Generated by kicad-footprint-generator · KiCad file format 20260206

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SN74HC21QDRQ1

Texas Instruments · Logic Gates · SOIC-14

SN74HC21QDRQ1 from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1A	input	Data input A of AND gate 1; unused inputs must be held at VCC or GND, and input current is 1 µA max.
2	1B	input	Data input B of AND gate 1; unused inputs must be held at VCC or GND, and input current is 1 µA max.
3	NC	unconnected	Not connected; the datasheet labels this pin NC and gives no further function.
4	1C	input	Data input C of AND gate 1; unused inputs must be held at VCC or GND, and input current is 1 µA max.
5	1D	input	Data input D of AND gate 1; unused inputs must be held at VCC or GND, and input current is 1 µA max.
6	1Y	output	Output of gate 1 (Y = A·B·C·D); can drive up to ten LSTTL loads with ±4 mA drive at 5 V.
7	GND	power_in	Ground reference pin for the device.
8	2Y	output	Output of gate 2 (Y = A·B·C·D); can drive up to ten LSTTL loads with ±4 mA drive at 5 V.
9	2A	input	Data input A of AND gate 2; unused inputs must be held at VCC or GND, and input current is 1 µA max.
10	2B	input	Data input B of AND gate 2; unused inputs must be held at VCC or GND, and input current is 1 µA max.
11	NC	unconnected	Not connected; the datasheet labels this pin NC and gives no further function.
12	2C	input	Data input C of AND gate 2; unused inputs must be held at VCC or GND, and input current is 1 µA max.
13	2D	input	Data input D of AND gate 2; unused inputs must be held at VCC or GND, and input current is 1 µA max.
14	VCC	power_in	Supply voltage, 2 V to 6 V recommended operating range (absolute maximum 7 V).

Key specifications

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

CAD (KiCad official)

Symbol: SN74HC21QDRQ1
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)
3D model files: sn74hc21qdrq1-etched.step / sn74hc21qdrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc21qdrq1.step / sn74hc21qdrq1.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (15 pp, sha256 f6de9b707f217039, retrieved 2026-10-08, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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).

Datasheet PDF