Remote 8-Bit I/O Expander for I2C-Bus - PCF8574

PCF8574 (ACTIVE)

Remote 8-Bit I/O Expander for I2C-Bus

 

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 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 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.

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

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Parametrics Compare all products in I2C IO Expander

 
Pin/Package
Voltage Nodes (V)
Operating Temperature Range (C)
Max Frequency (kHz)
I2C Address
Number of I/Os
Rating
Special Features
PCF8574
16QFN
16SOIC
16PDIP
20VQFN
20TSSOP
20TVSOP   
5
3.3   
-40 to 85   
100   
0100 xxx   
8   
Catalog   
Interrupt Output
Push-Pull I/O Type