PCF8574ARGYR

8BIT远程I / O扩展器I2C总线 REMOTE 8BIT I/O EXPANDER FOR I2C BUS

This 8-bit input/output I/O expander for the two-line bidirectional bus I2C is designed for 2.5-V to 6-V VCC operation.

The PCF8574A device provides general-purpose remote I/O expansion for most microcontroller families via 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 high-current 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.