component

SN74HCS21PWR

Public Made by Adom

by adom

Texas Instruments Logic Gates, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogicsn74hcs21pwrfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 5d ago
viewers sn74hcs21pwr: viewers · Ray 5d ago
package.json Publish 0.1.0 · Ray 5d ago
page.json Set visibility: public · Ray 5d ago
README.md Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr-etched.glb Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr-etched.step sn74hcs21pwr: factory component page (tier=mfr) · Ray 5d ago
sn74hcs21pwr-hero.glb sn74hcs21pwr: hero GLB from the etched model (keeps the MPN mark) · Ray 5d ago
sn74hcs21pwr-hero.overlay.json Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr.glb Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr.kicad_mod Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr.kicad_sym Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr.lbr Publish 0.1.0 · Ray 5d ago
sn74hcs21pwr.step Publish 0.1.0 · Ray 5d ago

SN74HCS21PWR

Texas Instruments · Logic Gates · TSSOP-14

SN74HCS21PWR from Texas Instruments, in a TSSOP-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 Channel 1 input A of the first 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
2 1B input Channel 1 input B of the first 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
3 NC unconnected Not internally connected.
4 1C input Channel 1 input C of the first 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
5 1D input Channel 1 input D of the first 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
6 1Y output Channel 1 output Y, a balanced CMOS push-pull output rated for ±7.8mA output drive at 5V.
7 GND power_in Ground reference for the device; the ground voltage produces the output LOW level.
8 2Y output Channel 2 output Y, a balanced CMOS push-pull output rated for ±7.8mA output drive at 5V.
9 2A input Channel 2 input A of the second 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
10 2B input Channel 2 input B of the second 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
11 NC unconnected Not internally connected.
12 2C input Channel 2 input C of the second 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
13 2D input Channel 2 input D of the second 4-input AND gate; Schmitt-trigger input that must not be left floating and must be tied to VCC or GND if unused.
14 VCC power_in Positive supply; recommended operating range is 2V to 6V with an absolute maximum of 7V.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VCC -0.5 7 V 4
Input clamp current IIK -20 20 mA VI < -0.5 or VI > VCC + 0.5 4
Output clamp current IOK -20 20 mA VO < -0.5 or VO > VCC + 0.5 4
Continuous output current IO -35 35 mA VO = 0 to VCC 4
Continuous current through VCC or GND -70 70 mA 4
Junction temperature TJ 150 °C 4
Storage temperature Tstg -65 150 °C 4
Supply voltage VCC 2 6 V 4
Input voltage VI 0 V VI = 0 to VCC 4
Output voltage VO 0 V VO = 0 to VCC 4
Ambient temperature TA -40 125 °C 4
Junction-to-ambient thermal resistance RθJA 151.7 °C/W PW (TSSOP) 14 pins 4
Junction-to-case (top) thermal resistance RθJC(top) 79.4 °C/W PW (TSSOP) 14 pins 4
Junction-to-board thermal resistance RθJB 94.7 °C/W PW (TSSOP) 14 pins 4
Junction-to-top characterization parameter ΨJT 25.2 °C/W PW (TSSOP) 14 pins 4
Junction-to-board characterization parameter ΨJB 94.1 °C/W PW (TSSOP) 14 pins 4
Positive switching threshold VT+ 1.13 1.26 1.37 V VCC = 2V 5
Positive switching threshold VT+ 2.31 2.47 2.66 V VCC = 4.5V 5
Positive switching threshold VT+ 2.99 3.18 3.44 V VCC = 6V 5
Negative switching threshold VT- 0.55 0.62 0.71 V VCC = 2V 5
Negative switching threshold VT- 1.21 1.36 1.5 V VCC = 4.5V 5
Negative switching threshold VT- 1.56 1.79 1.99 V VCC = 6V 5
Hysteresis voltage ΔVT 0.54 0.64 0.71 V VCC = 2V 5
Hysteresis voltage ΔVT 0.94 1.11 1.27 V VCC = 4.5V 5
Hysteresis voltage ΔVT 1.2 1.38 1.57 V VCC = 6V 5
High-level output voltage VOH 4 4.3 V IOH = -6mA, VCC = 4.5V 5
High-level output voltage VOH 5.4 5.75 V IOH = -7.8mA, VCC = 6V 5
Low-level output voltage VOL 0.002 0.1 V IOL = 20µA, VCC = 2V to 6V 5
Low-level output voltage VOL 0.18 0.3 V IOL = 4mA, VCC = 4.5V 5
Low-level output voltage VOL 0.22 0.33 V IOL = 7.8mA, VCC = 6V 5
Input leakage current II -1000 1000 nA VI = VCC or 0, VCC = 6V 5
Supply current ICC 0.1 2 µA VI = VCC or 0, IO = 0, VCC = 6V 5
Propagation delay A or B to Y tpd 22 52 ns VCC = 2V 5
Propagation delay A or B to Y tpd 9 22 ns VCC = 4.5V 5
Propagation delay A or B to Y tpd 8 16 ns VCC = 6V 5
Transition time Y tt 9 17 ns VCC = 2V 5
Transition time Y tt 5 8 ns VCC = 4.5V 5
Transition time Y tt 4 7 ns VCC = 6V 5
Input capacitance Ci 5 pF VCC = 2V to 6V 5

CAD (KiCad official)

  • Symbol: SN74HCS21PWR
  • Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
  • 3D model: TSSOP-14 (KiCad packages3D, STEP)
  • 3D model files: sn74hcs21pwr-etched.step / sn74hcs21pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hcs21pwr.step / sn74hcs21pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 74192b7ecb6dcbd6, retrieved 2026-10-17, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), 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