PCF8575C Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output | TI.com

PCF8575C (ACTIVE)

Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output

 

Description

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 4.5-V to 5.5-V VCC operation.

The PCF8575C provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock (SCL) and serial data (SDA).

The device features a 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10), 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 in 3-state mode. The strong pullup to VCC allows fast-rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. After power on, as all the I/Os are set to 3-state, all of them can be used as inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the write mode. If a high is applied externally to an I/O that has been written earlier to low, a large current (IOL) flows to GND.

Features

  • I2C to Parallel-Port Expander
  • Open-Drain Interrupt Output
  • Low Standby-Current Consumption of
    10 µA Maximum
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Address by Three Hardware Address Pins
    for Use of up to Eight Devices
  • Latched Outputs With High-Current Drive
    Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA
    Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model
    • 200-V Machine Model
    • 1000-V Charged-Device Model

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Parametrics Compare all products in I2C general purpose I/O (GPIO)

 
Number of I/Os
VCC (Min) (V)
VCC (Max) (V)
GPIO
Frequency (Max) (kHz)
Features
Addresses
Rating
Operating temperature range (C)
Package Group
PCF8575C
16    
4.5    
5.5    
VCC    
400    
Interrupt Pin    
8    
Catalog    
-40 to 85    
SOIC | 24
SSOP | 24
SSOP | 24
TSSOP | 24
TVSOP | 24
VQFN | 24