PCF8574AT/3,518

PCF8574AT/3,518 is a remote 8bit I/O expander for I2C-bus with interrupt. It provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The device consists of eight quasi-bidirectional ports, 100KHz I2C-bus interface, three hardware address inputs and interrupt output operating between 2.5V and 6V. 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 host can read from the input port or write to the output port through a single register. The low current consumption of 2.5 µA (typical, static) is great for mobile applications and the latched output ports directly drive LEDs. Applications include LED signs and displays, servers, key pads, industrial control, medical equipment, PLC, cellular telephones, mobile devices, gaming machines, instrumentation and test measurement.

• 100KHz I2C-bus interface (standard-mode I2C-bus)
• 8bit remote I/O pins that default to inputs at power-up
• Latched outputs directly drive LEDs
• Total package sink capability of 80mA
• Active LOW open-drain interrupt output
• Eight programmable server addresses using three address pins
• 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 100mA
• SO16 package
• Temperature range from -40°C to +85°C