Multi-Function I/O Driver 16-Pin QFN T/R

The IS31IO7328 2-wire serial-interfaced peripheral features 8 I/O ports. Ports are divided into four push pull I/Os and four open-drain I/Os and transition detection.Any of the 8 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 IS31IO7328 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 I²C communication to or from the IS31IO7328. The IS31IO7328 uses two address inputs to allow 2 I²C 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
• 4 push-pull I/O ports
• 4 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