PCA9534 Overview
This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)]. The PCA9534 consists of one 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low) register.
PCA9534 Key Features
- 1 Low Standby Current Consumption of 1 μA Max
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
- 5-V Tolerant I/O Ports
- 400-kHz Fast I2C Bus
- Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus
- Allows Up to 16 Devices on the I2C/SMBus When Used in Conjunction with the PCA9534A See Device parison Table for I2C Exp
- Input/Output Configuration Register
- Polarity Inversion Register
