SN7325 Datasheet | Si-En

.. Multi-function I/O Drive General Description The SN7325 2-wire serial-interfaced peripheral Features 16 I/O ports. Ports are divided into eight push pull I/Os and eight open-drain I/Os and transition detection. Any of the 16 I/O ports can be configured as an input or an output. All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the INT output. The interrupt is latched, allowing detection of transient changes. When the SN7325 is subsequently read through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20m A at 0.26V headroom, and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C munication to or from the SN7325. The SN7325 uses two address inputs to allow 4 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports. ________ _______ Features - - - - - - - - 400k Hz I2C Serial Interface 2.4V to 5.5V Operation 8 Push-Pull I/O ports 8 Open-Drain I/O Ports, Rated to 20m A Sink Current at 0.26V headroom Selectable I/O Port Power-Up Default Logic States INT Output Alerts Change on Inputs Low 0.3μA (typ) Standby Current -40°C to +125°C Temperature Range Applications - - - - - - Cell Phones Notebooks SAN/NAS Satellite Radio Servers Automotive Typical Application Circuit 2.8V Vbat 1u F 4.7k SCL 4.7k SDA 4.7k INT RST 100k INT RST SDA SCL Vcc PP0 PP1 PP2 PP3 PP4 PP5 PP6 PP7 OD0 OD1 OD2 OD3 AD1 AD0 GND OD4 OD5 OD6 OD7 INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT 1 Jan. 2009, Ver1.0 SI-EN technology .. Functional Block Diagram AD0 AD1 SCL SDA I2C Input Filter Control I/O Ports OD7 OD6 OD5 OD4 OD3 OD2 OD1 OD0 PP7 PP6 PP5 PP4 PP3 PP2 PP1...