PCF8574A中文资料具有中断的 8 位 2.5V 至 5.5V I2C/SMBus I/O 扩展器数据手册TI规格书

描述 Description

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.

特性 Features

• Low standby-current consumption of 10 µA max
• I2C to parallel-port expander
• Open-drain interrupt output
• Compatible with most microcontrollers
• Latched outputs with high-current drive capability for directly driving LEDs
• Latch-up performance exceeds 100 mA Per JESD 78, Class II