MAX7320AEE+

Overview

The MAX7320AEE+ is an I²C port expander featuring eight push-pull output ports. It operates within a supply voltage range of +1.71V to +5.5V and supports serial clock frequencies up to 400kHz. The device utilizes two address inputs (AD0, AD2) to configure one of sixteen slave addresses. Output power-up logic states are selectable in groups of four based on these address connections. The RST input clears the serial interface without altering output register contents. 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 QSOP package.

Feature Summary

• Eight push-pull output ports with configurable power-up default states
• I²C serial interface supporting up to 400kHz clock frequency
• Sixteen selectable slave addresses via AD0 and AD2 inputs
• RST input terminates active serial transactions

Applications

• Cell Phones/PDAs
• Satellite Radios
• Notebooks
• RAID Systems
• Servers

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and RoHS compliance status. Ensure the selected variant matches the required temperature range and pin configuration for the target application design.

Selection Notes

Select this component when eight independent push-pull outputs are required alongside I²C connectivity. Consider the specific slave address requirements and power-up state configurations determined by the AD0 and AD2 pin connections during system initialization.

Part Context

The MAX7320 belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. Unlike other family members that offer open-drain or mixed I/O capabilities, the MAX7320 provides exclusively push-pull outputs. It shares the same physical footprint as variants like the MAX7319 and MAX7321 but differs in internal logic and electrical characteristics.

Replacement Considerations

The datasheet identifies the PCF8574 and PCF8574A as second sources. Note that these alternatives utilize different I²C slave address ranges compared to the MAX7320.