SN7325�_相关信息_联睿国际电子有限公司

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 20mA, and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication 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

400kHz I2C Serial Interface
+2.4V to +5.5V Operation
8 Push-Pull Outputs
8 Open-Drain I/O Ports, Rated to 20mA Sink Current
Selectable I/O Port Power-Up Default Logic States
INT Output Alerts Change on Inputs
Low 0.6μA (typ) Standby Current
-40°C to +125°C Temperature Range

Applications

Cell Phones
Notebooks
SAN/NAS
Satellite Radio
Servers
Automotive

Typical Application Circuit