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

View more

Parametrics Compare all products in I2C General Purpose I/O (GPIO)

 
Voltage Nodes (V)
fSCLK (Max) (MHz)
VCC (Min) (V)
Max Frequency (kHz)
VCC (Max) (V)
I2C Address
Number of I/Os
Rating
Operating Temperature Range (C)
Package Group
Pin/Package
PCF8574 PCF8575 TCA9534A TCA9535
5
3.3   
5.5
3.6
2.7
2.5   
1.8
2.5
3.3
5   
1.8
2.7
3.3
3.6
5   
0.1    0.4    0.4    0.4   
2.5    2.5    1.65    1.65   
100    400    400    400   
6    5.5    5.5    5.5   
0100 xxx    0100 xxx    0111 xxx    0100 xxx   
8    16    8    16   
Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85    -40 to 85   
PDIP
SOIC
TSSOP
TVSOP
TVSOP
VQFN
VQFN   
SOIC
SSOP
SSOP
TSSOP
TVSOP
VQFN   
SOIC
TSSOP   
SSOP
TSSOP
VQFN
WQFN   
16PDIP
16SOIC
16TVSOP
16VQFN
20TSSOP
20TVSOP
20VQFN   
24SOIC
24SSOP
24SSOP
24TSSOP
24TVSOP
24VQFN   
16SOIC
16TSSOP   
24SSOP
24TSSOP
24VQFN
24WQFN   

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