PCF8574 Remote 8-Bit I/O Expander for I2C-Bus | TI.com

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

Parametrics

Compare all products in I2C general purpose I/O (GPIO) Email Download to Excel
Part number Order Number of I/Os VCC (Min) (V) VCC (Max) (V) GPIO Frequency (Max) (kHz) Features Addresses Rating Operating temperature range (C) Package Group
PCF8574 Order now 8     2.5     6     VCC     100     Interrupt Pin     8     Catalog     -40 to 85     PDIP | 16
SOIC | 16
TSSOP | 20
TVSOP | 16
TVSOP | 20
VQFN | 16
VQFN | 20    
PCF8575 Order now 16     2.5     5.5     VCC     400     Interrupt Pin     8     Catalog     -40 to 85     SOIC | 24
SSOP | 24
SSOP | 24
TSSOP | 24
TVSOP | 24
VQFN | 24