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Texas Instruments PCA9555PWR — Interface & Transceivers

PCA9555PWR I²C GPIO Expander, 16 I/O, 400 kHz, 24-TSSOP

MPNPCA9555PWR
NRND

Texas Instruments PCA9555PWR, 16-bit I²C/SMBus GPIO expander, 400 kHz, 2.3 V~5.5 V, 10 mA source / 25 mA sink, POR, interrupt output, -40°C~85°C, 24-TSSOP, Tape & Reel.

$3.0200Ref. price · indicative, final on quote
Texas Instruments PCA9555PWR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

PCA9555PWR specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Voltage2.3V ~ 5.5V
Current - output source (Sink)10mA, 25mA
Frequency400 kHz
InterfaceI²C, SMBus
Operating temperature-40°C~85°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesPOR
Number of i (O)16
Case24-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

The PCA9555PWR: It provides 16 I/O lines configurable as inputs or outputs with push-pull drive, each capable of sourcing 10 mA or sinking 25 mA — enough to drive LEDs or small relays directly. A built-in Power-On Reset (POR) ensures the outputs start in a known state. Typical applications include server/telecom backplane GPIO expansion, industrial sensor monitoring, and automotive body-control modules where extra digital I/O is needed without adding a bigger MCU.

NRND — plan your next BOM revision

For a new design, consider the PCA9555 family or a newer I²C GPIO expander from TI's current portfolio; for an existing BOM, the NRND flag means you should qualify a second source or stock a last-time buy quantity before the end-of-life window closes.

Package and assembly — 24-TSSOP in Tape & Reel

24-TSSOP package, surface mount, Tape & Reel.

Frequently asked questions

What is the replacement for PCA9555PWR?

The base product PCA9555 is the same die in a different package variant. For a new design, evaluate TI's current I²C GPIO expander portfolio — parts like the TCA9555 or TCA6416A offer similar 16-bit I²C expansion in smaller packages.