component

SN74AHC257PWR

Public Made by Adom

by adom

Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogicsn74ahc257pwrfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
sn74ahc257pwr / README.md
History Download
Ray Publish 0.1.0 643b0a5 5d ago

SN74AHC257PWR

Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-16

SN74AHC257PWR from Texas Instruments, in a TSSOP-16. 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 A/B input Data select input shared by all four channels.
2 1A input Channel 1 data input A.
3 1B input Channel 1 data input B.
4 1Y tri_state Channel 1 three-state output Y.
5 2A input Channel 2 data input A.
6 2B input Channel 2 data input B.
7 2Y tri_state Channel 2 three-state output Y.
8 GND power_in Ground reference.
9 3Y tri_state Channel 3 three-state output Y.
10 3B input Channel 3 data input B.
11 3A input Channel 3 data input A.
12 4Y tri_state Channel 4 three-state output Y.
13 4B input Channel 4 data input B.
14 4A input Channel 4 data input A.
15 OE input Output enable input shared by all channels; active low.
16 VCC power_in Positive supply, recommended operating range 2 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-16
Category Logic
Pins 16

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 range VCC -0.5 7 V 4
Input voltage range VI -0.5 7 V 4
Voltage range applied to any output in high-impedance or power-off state VO -0.5 7 V 4
Output voltage range VO -0.5 V 4
Input clamp current IIK -20 mA VI < -0.5V 4
Output clamp current IOK -20 20 mA VO < -0.5V or VO > VCC + 0.5V 4
Continuous output current IO -25 25 mA VO = 0 to VCC 4
Continuous output current through VCC or GND -75 75 mA 4
Junction temperature TJ 150 °C 4
Storage temperature Tstg -65 150 °C 4
Electrostatic discharge, human-body model (HBM) V(ESD) -2000 2000 V per ANSI/ESDA/JEDEC JS-001 4
Electrostatic discharge, charged-device model (CDM) V(ESD) -1000 1000 V per ANSI/ESDA/JEDEC JS-002 4
Supply voltage VCC 2 5.5 V 4
High-level input voltage VIH 1.5 V VCC = 2V 4
High-level input voltage VIH 2.1 V VCC = 3V 4
High-level input voltage VIH 3.85 V VCC = 5.5V 4
Low-level input voltage VIL 0.5 V VCC = 2V 4
Low-level input voltage VIL 0.9 V VCC = 3V 4
Low-level input voltage VIL 1.65 V VCC = 5.5V 4
Input voltage VI 0 5.5 V 4
Output voltage VO 0 V 4
High-level output current IOH -50 µA VCC = 2V 4
High-level output current IOH -4 mA VCC = 3.3V ± 0.3V 4
High-level output current IOH -8 mA VCC = 5V ± 0.5V 4
Low-level output current IOL 50 µA VCC = 2V 4
Low-level output current IOL 4 mA VCC = 3.3V ± 0.3V 4
Low-level output current IOL 8 mA VCC = 5V ± 0.5V 4
Input transition rise or fall rate ∆t/∆v 100 ns/V VCC = 3.3V ± 0.3V 4
Input transition rise or fall rate ∆t/∆v 20 ns/V VCC = 5V ± 0.5V 4
Operating free-air temperature TA -40 125 °C 5
High-level output voltage VOH 2.58 V IOH = −4mA, VCC = 3V, TA = 25°C 5
High-level output voltage VOH 2.48 V IOH = −4mA, VCC = 3V, TA = -40°C to 125°C 5
High-level output voltage VOH 3.94 V IOH = −8mA, VCC = 4.5V, TA = 25°C 5
High-level output voltage VOH 3.8 V IOH = −8mA, VCC = 4.5V, TA = -40°C to 125°C 5
Low-level output voltage VOL 0.1 V IOL = 50μA, VCC = 2V to 5.5V, TA = 25°C 5
Low-level output voltage VOL 0.36 V IOL = 4mA, VCC = 3V, TA = 25°C 5
Low-level output voltage VOL 0.44 V IOL = 4mA, VCC = 3V, TA = -40°C to 125°C 5
Input leakage current II -0.1 0.1 µA VI = 5.5V or GND, VCC = 0V to 5.5V, TA = 25°C 5
Input leakage current II -1 1 µA VI = 5.5V or GND, VCC = 0V to 5.5V, TA = -40°C to 125°C 5
High-impedance output leakage current IOZ -0.25 0.25 µA VO = VCC or GND, VCC = 5.5V, TA = 25°C 5
High-impedance output leakage current IOZ -5 5 µA VO = VCC or GND, VCC = 5.5V, TA = -40°C to 125°C 5
Supply current ICC 4 µA VI = VCC or GND, IO = 0, VCC = 5.5V, TA = 25°C 5
Supply current ICC 40 µA VI = VCC or GND, IO = 0, VCC = 5.5V, TA = -40°C to 125°C 5
Input capacitance CI 2 10 pF VI = VCC or GND, VCC = 5V, TA = 25°C 5
Input capacitance CI 10 pF VI = VCC or GND, VCC = 5V, TA = -40°C to 125°C 5
Output capacitance CO 5 6 pF VO = VCC or GND, VCC = 5V 5
Junction-to-ambient thermal resistance (PW, TSSOP 16) RθJA 135.9 °C/W 5
Junction-to-case (top) thermal resistance (PW, TSSOP 16) RθJC(top) 70.3 °C/W 5
Junction-to-board thermal resistance (PW, TSSOP 16) RθJB 81.3 °C/W 5
Junction-to-top characterization parameter (PW, TSSOP 16) ΨJT 22.5 °C/W 5
Junction-to-board characterization parameter (PW, TSSOP 16) ΨJB 80.8 °C/W 5

CAD (KiCad official)

  • Symbol: SN74AHC257PWR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: sn74ahc257pwr-etched.step / sn74ahc257pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ahc257pwr.step / sn74ahc257pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 4a9e174f43beed03, retrieved 2026-10-19, 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