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SN74AHC257PWR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74AHC257PWR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ahc257pwr.step/sn74ahc257pwr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).