Multi-Function I/O Driver 24-Pin SOP T/R

The IS31IO7325 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 INTB output. The interrupt is latched, allowing detection of transient changes. When the IS31IO7325 is subsequently read through the serial interface, any pending interrupt is cleared.The open-drain outputs are rated to sink 20mA at 0.22V headroom, and are capable of driving LEDs. The RSTB input clears the serial interface, terminating any I2 C communication to or from the IS31IO7325. The IS31IO7325 uses two address inputs to allow 4 I2 C slave addresses. The slave address also determines the power-up logic state for the I/O ports.

• 400kHz I²C serial interface
• 2.4V to 5.5V operation
• 8 push-pull I/O ports
• 8 open-drain I/O ports, rated to 20mA sink current at 0.22V headroom
• Selectable I/O port power-up default logic states
• INTB output alerts change on inputs
• Low 0.3µA (Typ.) standby current
• -40°C to +125°C temperature range