MAX7322AEE+

Overview

The MAX7322AEE+ is an I2C port expander featuring four push-pull outputs and four input ports with selectable internal pullups. It operates from +1.71V to +5.5V, supports up to 400kHz serial communication, and includes latching transition detection with interrupt output. The device offers 16 selectable slave addresses via AD0/AD2 inputs, overvoltage-protected inputs up to +6V, and low standby current of 0.6µA typical. It is specified for the -40°C to +125°C automotive temperature range and available in a 16-pin QSOP package.

Feature Summary

• Four push-pull output ports rated at 20mA sink current
• Four input ports with maskable, latching transition detection
• Input ports overvoltage protected to +6V
• Low 0.6µA typical standby current

Applications

• Cell Phones
• SAN/NAS
• Servers
• Notebooks
• Satellite Radio

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm lead-free status and RoHS compliance. Confirm package type matches project requirements. Check availability through authorized distributors as supply may vary. Ensure voltage levels and interface compatibility with the host system before procurement.

Selection Notes

Select this component when a mix of push-pull outputs and monitored inputs is required on a single I2C bus. Consider the 16-address capability for multi-device systems. Verify that the +6V input tolerance meets signal requirements. Evaluate the need for latching interrupts versus polling for system efficiency.

Part Context

The MAX7322 belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It provides a specific configuration of four inputs and four push-pull outputs, distinguishing it from variants offering only inputs or open-drain I/O. This family allows designers to maintain consistent PCB layouts while adjusting functional requirements across different product iterations.

Replacement Considerations

Pin-compatible alternatives within the same family include the MAX7319, MAX7320, MAX7321, and MAX7323. These parts share the same footprint but differ in port configurations, such as offering all inputs or open-drain outputs instead of the mixed setup found in the MAX7322.