The PCF8575 is a 16-bit remote I/O expander produced by Philips. It has an operating voltage of 2.5-5.5V, a maximum standby current of 10μA, supports I2C-bus to parallel port expansion, supports 400kbits/s FAST I2C-bus, has an open-drain interrupt output, and is compatible with most microcontrollers.
The PCF8575 is a silicon CMOS I/O expander that provides 16 quasi‑bidirectional ports accessible over the I²C‑bus. It operates from 2.5 V to 5.5 V, draws a maximum standby current of 10 µA, and supports up to 400 kbits/s bus speed. The device includes an open‑drain interrupt output and latched outputs capable of directly driving LEDs.
The datasheet lists the pin configuration, timing diagrams, package dimensions (SSOP24), and handling guidelines such as soldering methods and device protection. Ordering information and address pin settings for up to eight devices are also provided.
| Operating supply voltage | 2.5 to 5.5 V |
|---|---|
| Standby current consumption | 10 µA max |
| Maximum I2C‑bus speed | 400 kbits/s |
| Interrupt output type | Open‑drain, active LOW |
| Number of I/O ports | 16 quasi‑bidirectional ports |
| Address pins | 3 hardware address pins, up to 8 devices |
| Output drive capability | Latched outputs with high current drive for LEDs |
The device operates from 2.5 V up to 5.5 V.
Up to eight devices can be addressed using the three hardware address pins.
The standby current is limited to 10 µA maximum.
It provides an open‑drain interrupt output that is active low.