This 16-bit I/O expander for the two-line bidirectional bus(I2C) is designed for 2.5-V to 5.5-V VCCoperation.
The PCF8575DBQR device provides general-purpose remote I/O expansion for most microcontrollerfamilies 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 directlydriving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of adata-direction control signal. At power on, the I/Os are high. In this mode, only a current sourceto VCC is active.
Feature
I2C to Parallel-PortExpander
Open-Drain Interrupt Output
Low Standby-CurrentConsumption of 10μAMax
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 DrivingLEDs
Current Source to VCC for Actively Driving a High at theOutput
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
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Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
