MAX7325ATG+

Overview

The MAX7325ATG+ is a 16-port I/O expander featuring eight push-pull outputs and eight open-drain I/O ports. It operates on a +1.71V to +5.5V supply with a 400kHz I2C interface. The device provides overvoltage protection up to +6V, selectable internal pullups, and latching transition detection via an INT output. Packaged in a 24-pin TQFN-EP (4mm x 4mm), it supports 16 slave addresses and functions within the -40°C to +125°C automotive temperature range.

Feature Summary

• Eight push-pull outputs and eight open-drain I/O ports rated for 20mA sink current
• Latching transition detection interrupt for continuous input monitoring
• I/O ports overvoltage protected to +6V independent of supply voltage
• Configurable power-up default logic states and internal pullup resistors

Applications

• Cell phones
• Servers
• Automotive systems

Procurement Notes

Verify the suffix 'ATG+' indicates a lead-free/RoHS-compliant package in the 24-pin TQFN format. Confirm the part number includes the slash or V designation if automotive qualification is required. Ensure the ordering code matches the specific pin configuration and exposed paddle requirements for the target PCB layout.

Selection Notes

Select this component when a mix of push-pull and open-drain ports is necessary. The choice between fixed logic levels and SDA/SCL connections for address inputs determines initial power-up states. Verify that the 20mA sink capability meets load requirements and that the 400kHz bus speed aligns with system timing constraints.

Part Context

This device belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It shares the same footprint as variants like the MAX7324 and MAX7326 but offers a unique combination of eight open-drain I/Os and eight push-pull outputs. This configuration bridges the gap between pure input/output specialized devices.

Replacement Considerations

The MAX7324AEG+ and MAX7326AEG+ are pin-compatible alternatives within the same family. Substitution requires verifying that the alternative's specific port configuration (e.g., all inputs vs. mixed) satisfies the circuit design requirements.