PCA9670
Overview
The PCA9670 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, 1 MHz 30 mA drive I2C-bus interface, three hardware address inputs and a reset input operating between 2.3 V and 5.5 V. 1 MHz I2C-bus Fast-mode Plus (Fm+) can support PWM dimming of LEDs, and higher I2C-bus drive 30 mA allows more devices to be on the bus without the need for bus buffers.
- I2C-bus to parallel port expander
- 1 MHz I2C-bus interface (Fast-mode Plus I2C-bus)
- SDA with 30 mA sink capability for 4000 pF buses
- Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 A current source
- 8-bit remote I/O pins that default to inputs at power-up
- Latched outputs with 25 mA sink capability for directly driving LEDs
- Total package sink capability of 200 mA
- Active LOW reset input
- Sixty-four programmable slave addresses using three address pins
