PCF8575DBR

pcf8575.pdf

Features
• I 2C to Parallel-Port Expander 

• Open-Drain Interrupt Output 

• Low Standby-Current Consumption of 10 μA Max 

• Compatible With Most Microcontrollers 

• 400-kHz Fast I 2C 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 

• Current Source to VCC for Actively Driving a High at the Output 

• 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

Applications

• Telecom Shelters: Filter Units 

• Servers 

• Routers (Telecom Switching Equipment) 

• Personal Computers 

• Personal Electronics 

• Industrial Automation 

• Products with GPIO-Limited Processors

Description

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 5.5-V VCC operation. The PCF8575 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I 2C interface [serial clock (SCL), 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 high. In this mode, only a current source to VCC is active.