MAX7327AATG+

Overview

The MAX7327AATG+ 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 with a typical standby current of 0.6µA. The device supports up to 400kHz serial communication and provides overvoltage protection on all ports to +6V. Outputs are rated for 20mA sink current, while the exposed pad TQFN package ensures thermal stability across the -40°C to +125°C automotive temperature range.

Feature Summary

• Four open-drain I/O ports support selectable internal pullups and latching transition detection for input monitoring.
• Twelve push-pull output ports provide direct drive capability for peripherals such as LEDs.
• Dynamic slave address selection via AD0 and AD2 inputs allows configuration without cycling the power supply.
• All I/O ports are overvoltage protected to +6V independent of the operating supply voltage.

Applications

• Cell phones
• Servers
• Notebooks

Procurement Notes

Verify that the ordering suffix matches the specific package dimensions required for the design. Confirm lead-free status and RoHS compliance through official manufacturer documentation before finalizing procurement. Ensure the supplier source is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this part when a combination of high-count push-pull outputs and configurable open-drain I/Os is required. Verify that the system supply voltage falls within the 1.71V to 5.5V range. Consider the 3.5mm x 3.5mm TQFN footprint constraints during PCB layout planning.

Part Context

This component belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It integrates functions similar to the MAX7320 and MAX7323 into a single 16-port device. The AATG+ suffix specifically denotes the 24-pin TQFN-EP package with a 3.5mm x 3.5mm body size.

Replacement Considerations

The MAX7327AEG+ serves as a package alternative using a 24-pin QSOP form factor. Other family members like the MAX7324 or MAX7326 offer different port configurations but maintain pin compatibility.