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PCF8574 - Remote 8-Bit I/O Expander

General Description

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

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)].

Key Features

  • Low standby-current consumption of 10μA 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 100mA per JESD 78, Class II 2.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PCF8574 SCPS068K – JULY 2001 – REVISED SEPTEMBER 2024 PCF8574 Remote 8-Bit I/O Expander for I2C Bus 1 Features • Low standby-current consumption of 10μA 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 100mA per JESD 78, Class II 2 Applications • Telecom shelters: filter units • Servers • Routers (telecom switching equipment) • Personal computers • Personal electronics • Industrial automation • Products with GPIO-limited processors 3 Description This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5V to 6V VCC operation.