MAX7329AAP+

I/o Expanders Overview

The MAX7329AAP+ 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 serial clock frequency of 100kHz. The device utilizes three hardware address pins (AD0, AD1, AD2) to select one of eight slave addresses in the 0x38 to 0x3F range. It provides latched outputs with high-current drive capability for direct LED driving and includes an open-drain interrupt output that alerts state changes on any port.

I/o Expanders Feature Summary

• I2C-compatible serial interface with transition detection
• Eight open-drain I/O ports with high-current drive capability
• Open-drain interrupt output for state change alerts
• Hardware-configurable slave addressing

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the specific package variant against the datasheet ordering information. Confirm the operating temperature range matches the application requirements. Ensure the I2C bus configuration aligns with the MAX7329 slave address range. Check RoHS compliance status if required by the manufacturing process.

I/o Expanders Selection Notes

Select this component when eight additional digital I/O lines are needed via an I2C interface. Choose the MAX7329 over the MAX7328 to utilize the distinct 0x38-0x3F address range, allowing mixed usage on the same bus. Verify that the open-drain output structure meets the load requirements for the intended peripheral connections.

I/o Expanders Part Context

The MAX7329 belongs to a family of pin-compatible port expanders from Analog Devices/Maxim Integrated. It serves as a second source alternative to the PCF8574A. The device shares architectural similarities with the MAX7328 but differs in its fixed slave ID address range, facilitating flexible system design.

I/o Expanders Replacement Considerations

The MAX7328 is a compatible alternative with a different slave address range (0x20-0x27). The PCF8574A is listed as a second source equivalent. Verify electrical characteristics and pinout compatibility before substitution.