NXP PCA9502BS,128 8-bit I²C/SPI GPIO expander, 400 kHz clock, push-pull outputs, interrupt output, 2.3V to 3.6V supply, -40°C to 85°C, 24-HVQFN (4x4 mm) exposed pad, surface mount, ROHS3 compliant.
| Parameter | Value |
|---|---|
| Output type | Push-Pull |
| Mounting | Surface Mount |
| Voltage | 2.3V ~ 3.6V |
| Frequency | 400 kHz |
| Interface | I²C, SPI |
| Operating temperature | -40°C ~ 85°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Number of i (O) | 8 |
| Case | 24-VFQFN Exposed Pad |
| Interrupt output | Yes |
The NXP PCA9502BS,128 is an 8-bit general-purpose I/O expander that talks to the host over either I²C or SPI at up to 400 kHz. It gives you eight push-pull output pins with an interrupt output, so the host doesn't have to poll for state changes — the expander asserts the interrupt line when an input changes.
It comes in a 24-HVQFN with an exposed pad, body size 4x4 mm.
Yes, it has a dedicated interrupt output pin. The expander asserts the interrupt when an input changes state, so the host MCU doesn't need to poll the I²C or SPI bus continuously.
The 128 suffix on the order code indicates the tape-and-reel packaging variant. The silicon and the 24-HVQFN package are identical between the two — only the shipping medium differs.