MAX7319ATE+

Overview

The MAX7319ATE+ is an I2C port expander featuring eight input ports with selectable internal pullups and overvoltage protection to +6V. It supports transition detection with a latching interrupt output, allowing the detection of transient changes between read operations. The device operates from a supply voltage ranging from +1.71V to +5.5V and includes a low standby current of 0.6µA (typical). It utilizes two address inputs (AD0, AD2) to select from 16 slave addresses and features a +5.5V tolerant RST input for clearing the serial interface. The component is specified over an automotive temperature range of -40°C to +125°C.

Feature Summary

• Eight input ports with maskable, latching transition detection
• +1.71V to +5.5V operating voltage range
• Low 0.6µA typical standby current
• Overvoltage protected to +6V

Applications

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

Procurement Notes

Verify that the ordering suffix 'ATE+' corresponds to the 16-pin TQFN package with an exposed pad and lead-free/RoHS compliance as indicated in the datasheet selector guide. Confirm the specific temperature grade matches the required operational environment. Ensure the supplier provides documentation confirming the component is sourced from Analog Devices or Maxim Integrated.

Selection Notes

Select this part when eight digital inputs with hardware-level transition detection are required. It serves as a second source to the PCF8574 and PCF8574A. Choose this model if the application demands overvoltage tolerance on inputs independent of the supply voltage and requires masking specific interrupts while monitoring all port states.

Part Context

The MAX7319 is part of the MAX7319–MAX7329 family of pin-compatible port expanders. This family includes variants with open-drain I/O ports and push-pull output ports. The MAX7319 specifically focuses on input-only functionality with advanced interrupt masking capabilities, distinguishing it from the output-focused MAX7320.

Replacement Considerations

The MAX7319 is documented as a second source to the PCF8574 and PCF8574A. Verify pin compatibility and electrical characteristics before substitution.