component

SN74AHCT244QPWR

Public Made by Adom

by adom

Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogicsn74ahct244qpwrfactory-2.0.0extractor-text

Verified SN74AHCT244QPWR

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SN74AHCT244QPWR · TSSOP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 19-page datasheet
  • ✓distributor: lcsc C2862331, digikey 296-13865-2-ND, mouser 595-SN74AHCT244QPWR
  • ✓family: TSSOP-20_4.4x6.5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-9pwzu4t7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ sn74ahct244qpwr.kicad_sym✓ sn74ahct244qpwr.kicad_mod✓ sn74ahct244qpwr.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
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 2h ago
viewers sn74ahct244qpwr: viewers · Ray 2h ago
package.json Publish 0.1.0 · Ray 2h ago
page.json Set visibility: public · Ray 2h ago
README.md Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr-etched.glb Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr-etched.step sn74ahct244qpwr: factory component page (tier=mfr) · Ray 2h ago
sn74ahct244qpwr-hero.glb sn74ahct244qpwr: hero GLB from the etched model (keeps the MPN mark) · Ray 2h ago
sn74ahct244qpwr-hero.overlay.json Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr.glb Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr.kicad_mod Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr.kicad_sym Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr.lbr Publish 0.1.0 · Ray 2h ago
sn74ahct244qpwr.step Publish 0.1.0 · Ray 2h ago
verification.json Verified: Published by the parts factory: tier mfr, 20 pins · Ray 2h ago

SN74AHCT244QPWR

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74AHCT244QPWR from Texas Instruments, in a TSSOP-20. 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 1OE input Bank 1 output enable, active low; when OE is high the Bank 1 outputs are in the high-impedance state.
2 1A1 input Bank 1 channel 1 data input, passed to output 1Y1 when 1OE is low.
3 2Y4 output Bank 2 channel 4 3-state output, active when 2OE is low.
4 1A2 input Bank 1 channel 2 data input, passed to output 1Y2 when 1OE is low.
5 2Y3 output Bank 2 channel 3 3-state output, active when 2OE is low.
6 1A3 input Bank 1 channel 3 data input, passed to output 1Y3 when 1OE is low.
7 2Y2 output Bank 2 channel 2 3-state output, active when 2OE is low.
8 1A4 input Bank 1 channel 4 data input, passed to output 1Y4 when 1OE is low.
9 2Y1 output Bank 2 channel 1 3-state output, active when 2OE is low.
10 GND power_in Ground reference for the device.
11 2A1 input Bank 2 channel 1 data input, passed to output 2Y1 when 2OE is low.
12 1Y4 output Bank 1 channel 4 3-state output, active when 1OE is low.
13 2A2 input Bank 2 channel 2 data input, passed to output 2Y2 when 2OE is low.
14 1Y3 output Bank 1 channel 3 3-state output, active when 1OE is low.
15 2A3 input Bank 2 channel 3 data input, passed to output 2Y3 when 2OE is low.
16 1Y2 output Bank 1 channel 2 3-state output, active when 1OE is low.
17 2A4 input Bank 2 channel 4 data input, passed to output 2Y4 when 2OE is low.
18 1Y1 output Bank 1 channel 1 3-state output, active when 1OE is low.
19 2OE input Bank 2 output enable, active low; when OE is high the Bank 2 outputs are in the high-impedance state.
20 VCC power_in Positive supply; recommended range 4.5 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Logic
Pins 20

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
High-level output voltage VOH 4.4 V IOH = -50 μA, VCC 4.5 V 5
High-level output voltage VOH 3.8 V IOH = -8 mA, VCC 4.5 V 5
Low-level output voltage VOL 0.1 V IOL = 50 μA, VCC 4.5 V 5
Low-level output voltage VOL 0.44 V IOL = 8 mA, VCC 4.5 V 5
Off-state output current IOZ -2.5 2.5 μA VO = VCC or GND, VCC 5.5 V 5
Input current II -1 1 μA VI = 5.5 V or GND, 0 V to 5.5 V 5
Quiescent supply current ICC 4 40 μA VI = VCC or GND, IO = 0, VCC 5.5 V 5
Additional supply current per input ΔICC 1.35 1.5 mA One input at 3.4 V, other inputs at VCC or GND, VCC 5.5 V 5
Input capacitance Ci 2.5 10 pF VI = VCC or GND, 5 V 5
Supply voltage VCC 4.5 5.5 V 4
High-level input voltage VIH 2 V 4
Low-level input voltage VIL 0.8 V 4
Input voltage VI 0 5.5 V 4
Output voltage VO 0 V Maximum VCC 4
High-level output current IOH -8 mA 4
Low-level output current IOL 8 mA 4
Operating free-air temperature TA -40 125 °C 4
Supply voltage range VCC -0.5 7 V 4
Input voltage range VI -0.5 7 V 4
Output voltage range VO -0.5 V VCC + 0.5 V maximum 4
Input clamp current IIK -20 mA VI < 0 4
Output clamp current IOK -20 20 mA VO < 0 or VO > VCC 4
Continuous output current IO -25 25 mA VO = 0 to VCC 4
Continuous current through VCC or GND -75 75 mA 4
Storage temperature range Tstg -65 150 °C 4
Junction-to-ambient thermal resistance RθJA 83 °C/W PW (TSSOP) 20 pins 4

CAD (KiCad official)

  • Symbol: SN74AHCT244QPWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: sn74ahct244qpwr-etched.step / sn74ahct244qpwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahct244qpwr.step / sn74ahct244qpwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (19 pp, sha256 5e8b9d71866b4d20, retrieved 2026-11-05, tier: manufacturer)
  • 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