MAX7327AATG+T

Overview

The MAX7327AATG+T is an I2C port expander featuring 12 push-pull outputs and four configurable open-drain I/O ports. It operates from a +1.71V to +5.5V supply voltage with a typical standby current of 0.6µA. The device supports I2C serial interfaces up to 400kHz and includes latching transition detection for input monitoring. Outputs are rated at 20mA sink current, and all ports are overvoltage protected to +6V independent of the supply voltage.

Feature Summary

• Integrates 12 push-pull output ports and four open-drain I/O ports with selectable internal pullups
• Features latching transition detection that alerts via an INT output when input states change
• Supports dynamic slave address selection using AD0 and AD2 inputs for flexible bus configurations
• Provides overvoltage protection on all I/O ports up to +6V regardless of the operating supply voltage

Applications

• Cell phones
• Servers
• Notebooks
• SAN/NAS systems
• Satellite radio

Procurement Notes

Verify the specific ordering suffix matches the required package dimensions. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the selected variant aligns with the intended automotive temperature range requirements.

Selection Notes

Select this component when a high density of push-pull outputs is required alongside configurable open-drain I/Os. Verify that the application utilizes an I2C master capable of supporting the specified clock frequencies. Ensure the system design accommodates the exposed paddle connection to ground for thermal management.

Part Context

This part belongs to the MAX7327 family of pin-compatible port expanders. It shares the same footprint as variants like the MAX7327AEG+ but differs in package type. The family provides choices between input-only, output-only, and mixed I/O configurations while maintaining consistent interface protocols.

Replacement Considerations

Consider the MAX7327AEG+ for applications requiring a QSOP package instead of TQFN. Other family members such as the MAX7324 or MAX7326 offer different ratios of push-pull to open-drain ports while maintaining pin compatibility.