PCF8574 Overview
Key Specifications
Package: LSSOP
Mount Type: Surface Mount
Pins: 20
Operating Voltage: 5 V
Description
The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 100 kHz I2C-bus interface, three hardware address inputs and interrupt output operating between 2.5 V and 6 V.
Key Features
- I2C-bus to parallel port expander
- 100 kHz I2C-bus interface (Standard-mode I2C-bus)
- Operating supply voltage 2.5 V to 6 V with non-overvoltage tolerant I/O held to VDD with 100 A current source
- 8-bit remote I/O pins that default to inputs
