MAX7326ATG+

Overview

The MAX7326ATG+ is a 2-wire serial-interfaced peripheral featuring 16 I/O ports, including 12 push-pull outputs and four input ports with selectable internal pullups. It operates from a +1.71V to +5.5V supply voltage and supports an I2C interface up to 400kHz. The device provides overvoltage protection on inputs to +6V and includes latching transition detection with interrupt output. It is available in a 24-pin TQFN package and specified for the -40°C to +125°C automotive temperature range.

Feature Summary

• Four input ports feature latching transition detection with programmable interrupt masking
• Twelve push-pull outputs rated at 20mA sink current capable of driving LEDs
• Input ports are overvoltage protected to +6V independent of supply voltage
• AD0 and AD2 address inputs select from 16 unique I2C slave addresses

Applications

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

Procurement Notes

Verify the specific ordering suffix ATG+ corresponds to the 24-pin TQFN-EP package when sourcing. Confirm RoHS compliance status as indicated by the plus sign. Ensure the component meets the required -40°C to +125°C operating temperature specifications for your application environment before finalizing procurement.

Selection Notes

Select this part when 12 push-pull outputs and four monitored inputs are required within a single 16-port expander. Verify that the I2C bus speed requirements do not exceed 400kHz. Ensure the system power supply remains within the 1.71V to 5.5V operational range. Consider the exposed pad thermal dissipation characteristics if high current loads are applied to the outputs.

Part Context

The MAX7326ATG+ belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It shares the same footprint as variants offering different configurations, such as open-drain or mixed I/O ports. This specific model focuses on maximizing push-pull output capability while retaining essential input monitoring features for general-purpose expansion tasks.

Replacement Considerations

Direct pin-compatible replacements within the same family include the MAX7324, MAX7325, and MAX7327. Verify that the alternative part's output configuration (open-drain vs. push-pull) matches the circuit design requirements before substitution.