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.