Skip to main content
Log in
NXP Semiconductors PCA9670PW,118 — Analog & Data Acquisition

NXP PCA9670PW,118 I2C I/O Expander, 1 MHz, 8 I/O, 16-TSSOP

MPNPCA9670PW,118
End of Life

NXP Semiconductors PCA9670PW,118 I2C I/O expander, 8 I/O, 1 MHz clock, 2.3V-5.5V supply, -40°C to 85°C, 16-TSSOP, Push-Pull output, POR, Tape & Reel.

$1.64Ref. price · indicative, final on quote
NXP Semiconductors PCA9670PW,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

PCA9670PW,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)8
Case16-TSSOP (0.173\", 4.40mm Width)
Interrupt outputNo

Product details

1 MHz I2C I/O expander with POR

The NXP PCA9670PW,118 is an 8-bit I2C I/O expander clocked at 1 MHz, providing eight push-pull output lines for general-purpose digital expansion in embedded systems.

Output drive and interrupt handling

Each I/O can sink 25 mA or source 100 µA — the sink current is enough to drive an LED directly, but the source side is weak, so pull-ups or external drivers are needed for high-side loads. There is no interrupt output pin on this expander — the host must poll the I2C bus to detect input changes, which matters for latency-sensitive applications where an interrupt-driven part like the PCA9671 would be a better fit. The built-in Power-On Reset (POR) ensures the outputs default to a known state after power-up, eliminating the need for an external reset supervisor in many designs.

Frequently asked questions

Does PCA9670PW have an interrupt output?

No — this part does not include an interrupt output pin. The host must poll the I2C bus to detect input changes. If interrupt-driven operation is required, consider the PCA9671 which adds an interrupt output.

What is the difference between PCA9670 and PCA9671?

The PCA9670 has no interrupt output, while the PCA9671 adds an interrupt output pin. Both are 8-bit I2C I/O expanders with the same 1 MHz clock, supply range, and push-pull outputs — the interrupt is the deciding factor for latency-sensitive applications.