Remote and SMBus I/O Expander 24-Pin SOIC T/R

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 I2C 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.

I²C to Parallel-Port Expander

Open-Drain Interrupt Output

Low Standby-Current Consumption of 10 µA Max

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

Current Source to V_CC 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