MAX7319ATE+T

Overview

The MAX7319ATE+T is an I2C port expander featuring eight input ports with selectable internal pullups and overvoltage protection to +6V. It supports transition detection with a maskable interrupt output. The device operates from a supply voltage of 1.71V to 5.5V, with a maximum serial clock frequency of 400kHz. It provides sixteen selectable I2C slave addresses via AD0 and AD2 inputs. Standby current is typically 0.6µA. The component is specified for operation between -40°C and +125°C and is housed in a 16-pin TQFN package.

Feature Summary

• Eight input ports with latching transition detection and interrupt masking
• Overvoltage protection on all pins up to +6V independent of supply voltage
• Sixteen selectable I2C slave addresses using four-level logic on address inputs
• Supports hot insertion with high-impedance state during power-down

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm lead-free status and RoHS compliance requirements prior to procurement. Ensure the selected variant matches the required interface voltage levels and operating conditions for the target application environment.

Selection Notes

Select this component when eight digital inputs with transient detection are required. Verify that the I2C bus speed does not exceed 400kHz. Check if the available sixteen slave addresses fit the system topology. Consider the exposed pad requirement for thermal management and grounding in the PCB layout.

Part Context

This part belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It is specifically designed as an input-only version within this series. Other family members offer open-drain or push-pull outputs. The MAX7319 provides maximum versatility for automatic input monitoring applications requiring interrupt generation on data changes.

Replacement Considerations

The MAX7328 and MAX7329 are documented as second sources to PCF8574 and PCF8574A respectively, but they differ in interrupt behavior. Direct pin-compatible replacements within the same manufacturer family include other variants from the MAX7319–MAX7329 series.