MAX7320ATE+

Overview

The MAX7320ATE+ is an I2C serial-interfaced peripheral featuring eight push-pull output ports with selectable power-up logic states. It operates from a supply voltage of +1.71V to +5.5V and supports hot insertion with overvoltage-tolerant inputs up to +6V. The device utilizes two address inputs (AD0, AD2) to configure one of 16 possible I2C slave addresses. It includes an active-low RST input to clear the serial interface and terminate transactions. The component is specified for operation across the automotive temperature range of -40°C to +125°C and is available in 16-pin QSOP and TQFN packages.

Feature Summary

• Eight push-pull output ports with configurable power-up default logic levels
• I2C-compatible serial interface supporting up to 400kHz clock frequency
• Hot insertion capability with overvoltage-tolerant digital inputs
• Low standby current consumption during idle interface periods

Applications

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

Procurement Notes

Verify the specific package variant required, as the MAX7320 family includes both QSOP and TQFN options. Confirm that the selected address configuration aligns with the intended power-up state requirements. Ensure the design accounts for the exposed pad connection to ground in TQFN implementations. Cross-reference the I2C address map to prevent bus conflicts with other devices.

Selection Notes

Select this component when eight push-pull outputs are necessary without interrupt capabilities. Compare against the MAX7319 or MAX7321 if input monitoring or open-drain configurations are preferred. Consider the MAX7328 or MAX7329 if PCF8574 compatibility is required. Verify that the operating voltage range meets the system's power supply specifications.

Part Context

The MAX7320 belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It serves as the output-only variant within this group, distinguished by its push-pull architecture. Other family members provide input ports, open-drain I/O, or combinations thereof. This positioning allows designers to maintain consistent footprint layouts while varying functional capabilities.

Replacement Considerations

The datasheet identifies the MAX7328 as a second source to the PCF8574 and the MAX7329 as a second source to the PCF8574A. These alternatives offer open-drain I/O rather than push-pull outputs. Direct software replacement requires verifying the differences in output drive characteristics and address maps.