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NXP Semiconductors PCA8574PW,118 — Discrete Semiconductors

NXP PCA8574PW,118 I2C GPIO Expander, 8 I/O, 400 kHz

MPNPCA8574PW,118
End of Life

NXP PCA8574PW,118 I2C GPIO Expander, 8 I/O, 400 kHz, 2.3V–5.5V, Push-Pull Output, POR, Interrupt, -40°C~85°C, 16-TSSOP.

$1.79Ref. price · indicative, final on quote
NXP Semiconductors PCA8574PW,118 datasheet (PDF)
Packaging16-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

PCA8574PW,118 specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Voltage2.3V ~ 5.5V
Current - output source (Sink)100µA, 25mA
Frequency400 kHz
InterfaceI²C
Operating temperature-40°C ~ 85°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesPOR
Number of i (O)8
Case16-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

What the PCA8574PW,118 does on your board

The NXP PCA8574PW,118 is an 8-bit I²C GPIO expander in a 16-TSSOP package. It adds eight general-purpose I/O lines to a host microcontroller over a two-wire I²C bus running at 400 kHz. The part includes a power-on reset (POR) feature and a dedicated interrupt output that signals the host when an input state changes — useful for polling-free keypad or sensor monitoring.

Supply range of 2.3 V to 5.5 V. Operating temperature -40°C to 85°C.

Housed in a 16-TSSOP (4.40 mm width) package, surface-mount only. Cut Tape works for prototypes and small-batch builds.

Frequently asked questions

Does the PCA8574PW,118 have an interrupt output?

Yes, the PCA8574PW,118 includes a dedicated interrupt output (INT) that asserts low when any input pin changes state. This allows the host MCU to poll only on interrupt, reducing I²C traffic and CPU overhead.