PCF8574AT Remote 8-bit IO Expander for I2C-Bus with Interrupt SMD SO16

Part Number: PCF8574AT-SO16

PCF8574AT Remote 8-bit IO Expander for I2C-Bus with Interrupt SO16 Original

Description:

The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 100 kHz I2C-bus interface, three
hardware address inputs and interrupt output operating between 2.5 V and 6 V. The
quasi-bidirectional port can be independently assigned as an input to monitor interrupt
status or keypads, or as an output to activate indicator devices such as LEDs. System
master can read from the input port or write to the output port through a single register.


The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal
pull-up 100 uA current source.

Features and benefits:

- I2C-bus to parallel port expander
- 100 kHz I2C-bus interface (Standard-mode I2C-bus)
- Operating supply voltage 2.5 V to 6 V with non-overvoltage tolerant I/O held to VDD with 100 uA current source
- 8-bit remote I/O pins that default to inputs at power-up
- Latched outputs directly drive LEDs
- Total package sink capability of 80 mA
- Active LOW open-drain interrupt output
- Eight programmable slave addresses using three address pins
- Low standby current (2.5 uA typical)
- -40C to +85C operation
- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA

Applications
- LED signs and displays
- Servers
- Key pads
- Industrial control
- Medical equipment
- PLC
- Cellular telephones
- Mobile devices
- Gaming machines
- Instrumentation and test measurement

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