MAX7328AWE+

I/o Expanders Overview

The MAX7328AWE+ is an I2C-compatible serial port expander featuring eight open-drain input/output ports. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 100kHz. The device provides up to 25mA sink current per port and includes an open-drain interrupt output for transition detection. Addressing is configured via three hardware pins, allowing multiple devices on the bus. It functions in an industrial temperature range from -40°C to +125°C.

I/o Expanders Feature Summary

• I2C-compatible serial interface with 5.5V-tolerant inputs
• Eight open-drain I/O ports with high-current drive capability
• Hardware-configurable slave address selection
• Continuous input state monitoring with interrupt generation

I/o Expanders Applications

• RAID controllers
• Server systems
• Notebook computers
• Industrial control equipment

I/o Expanders Procurement Notes

Verify the component against official Analog Devices documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering suffix matches the required lead-free packaging standard. Cross-reference the specific part number with authorized distributors to validate authenticity and current availability status before finalizing procurement decisions.

I/o Expanders Selection Notes

Select this component when an I2C port expander with open-drain outputs and interrupt capabilities is required. Verify that the system voltage falls within the 2.5V to 5.5V operating range. Confirm that the 100kHz interface speed meets the system timing requirements. Consider the wide operating temperature range for harsh environments.

I/o Expanders Part Context

This device belongs to the MAX7328/MAX7329 family of I2C port expanders. It serves as a second source alternative to the PCF8574 series. The MAX7328 variant utilizes a specific slave ID address range distinct from the MAX7329, enabling mixed-device configurations on the same bus while maintaining pin compatibility across the package options.

I/o Expanders Replacement Considerations

The datasheet identifies the PCF8574 and PCF8574A as second-source alternatives. Verify functional equivalence regarding open-drain output characteristics and interrupt logic. Confirm that the replacement device supports the required 5.5V tolerance on the SDA and SCL lines.