PCF8574
TI
德州仪器
电子元器件分类
用于 I2C 总线的远程 8 位 I/O 扩展器
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 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 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.
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- Low Standby-Current Consumption of 10 µA Max
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- I2C to Parallel-Port Expander
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- Open-Drain Interrupt Output
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- Compatible With Most Microcontrollers
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- Latched Outputs With High-Current Drive
Capability for Directly Driving LEDs
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- Latch-Up Performance Exceeds 100 mA
Per JESD 78, Class II