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NXP Semiconductors PCA9675PW,118 — Logic ICs

NXP PCA9675PW,118 I2C GPIO Expander, 16 I/O, 1 MHz, 24-TSSOP

MPNPCA9675PW,118
End of Life

NXP PCA9675PW,118 I2C GPIO expander, 16 I/O, push-pull outputs, 1 MHz clock, 2.3V-5.5V supply, -40°C to 85°C, 24-TSSOP package, POR, interrupt output.

$2.74Ref. price · indicative, final on quote
NXP Semiconductors PCA9675PW,118 datasheet (PDF)
Packaging24-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

PCA9675PW,118 specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Voltage2.3V ~ 5.5V
Current - output source (Sink)100µA, 25mA
Frequency1 MHz
InterfaceI²C
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

16 I/O I2C expander in a 24-TSSOP footprint

The NXP PCA9675PW,118 is a 16-bit I2C GPIO expander in a 24-TSSOP package, designed to add digital I/O to a system over a two-wire bus. The 16 I/O are configured as push-pull outputs, each capable of sinking 25 mA or sourcing 100 µA, which is enough to drive LEDs, small relays, or logic-level inputs directly. The I2C interface runs at up to 1 MHz, supporting Fast-mode+ throughput for applications like keypad scanning or status-indicator banks.

Interrupt output and event-driven I/O

An interrupt output (INT) signals the host MCU when any input pin changes state, so the system does not have to poll the I2C bus continuously. This is useful in battery-powered or latency-sensitive designs where the MCU can sleep until a button press or sensor edge wakes it.

Frequently asked questions

How many I/O pins does PCA9675PW have?

The PCA9675PW provides 16 I/O pins, all configurable as push-pull outputs.

Is PCA9675PW compatible with PCA9555?

The PCA9675PW is a functional alternative to the PCA9555: both are 16-bit I2C GPIO expanders in 24-TSSOP with similar supply range and output current. The PCA9675PW adds a POR feature and runs at 1 MHz (vs 400 kHz typical for PCA9555). Pin compatibility should be verified against the respective datasheets for the specific package variant.