MAX7323ATE+T

Overview

The MAX7323ATE+T is an I2C port expander featuring four push-pull outputs and four open-drain I/O ports. It operates from a +1.71V to +5.5V supply with a typical standby current of 0.6µA. The device supports a 400kHz serial interface and includes latching transition detection for input monitoring. Four I/O ports are overvoltage protected up to +6V independent of the supply voltage. Outputs can sink 20mA, suitable for driving LEDs. It offers 16 selectable slave addresses via AD0 and AD2 inputs and functions within an automotive temperature range of -40°C to +125°C.

Feature Summary

• Four push-pull output ports rated at 20mA sink current
• Four open-drain I/O ports rated to 20mA sink current
• I/O ports overvoltage protected to +6V independent of supply voltage
• Latching transient change detection with INT output alert

Applications

• Cell Phones
• Servers
• SAN/NAS
• Notebooks
• RAID

Procurement Notes

Verify the specific suffix 'ATE' corresponds to the 16-pin TQFN-EP package (3mm x 3mm) and the +125°C automotive rating. Confirm lead-free status (+) matches RoHS requirements. Ensure the ordering code aligns with the intended pin configuration and thermal pad connection for proper mounting.

Selection Notes

Select this component when a mix of push-pull outputs and overvoltage-tolerant open-drain I/Os is required on a single I2C bus. The 16 address options allow multiple devices on one bus. Verify that the 20mA sink capability meets load requirements and that the +6V tolerance covers external signal levels.

Part Context

This part belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It provides a specific combination of four open-drain I/O ports and four push-pull outputs, distinguishing it from variants offering only inputs or only outputs. It shares the same 16-pin footprint as other family members for design flexibility.

Replacement Considerations

Pin-compatible alternatives include MAX7321, MAX7322, MAX7328, and MAX7329. Verify software compatibility and register mapping differences before substitution. Ensure the replacement part supports the required voltage range and temperature specifications.