An I2C controlled, breadboard friendly GPIO exansion board based on the Texas Instruments PCF8574 with builtin buttons and LED's for prototyping.
The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface (serial clock(SCL), serial data (SDA)]. The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with highcurrent drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
The board has builtin buttons and LED's to help quickly prototype solutions and is able to be mounted either vertically or horizontally.
A switchable jumper is provided to connect all tactiles switches to VCC or to GND.
- 2.5V to 6.0V operation
- Arduino Library
- 8 Builtin tactile switches
- 8 Builtin controllable LED's
- Breadboard friendly
- Based on the popular PCF8574 I2C IC
- Low Standby-Current Consumption of 10 μA Max
- Open-Drain Interrupt Output
- Compatible With Most Microcontrollers
- Latched Outputs With High-Current Drive
- Single Maskable output register for all IO ports