MAX7329AWE+

I/o Expanders Overview

The MAX7329AWE+ 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 serial clock frequency up to 100kHz. The device utilizes three hardware address pins (AD0, AD1, AD2) to select one of eight slave addresses within the 0x38 to 0x3F range. Each port can sink up to 25mA, with a total device limit of 100mA. Standby current consumption is a maximum of 10μA. The component is housed in a 16-pin Wide SO package and functions across an operating temperature range of -40°C to +125°C.

I/o Expanders Feature Summary

• Eight open-drain I/O ports configurable as logic inputs or outputs
• Continuous transition detection with open-drain interrupt output
• Hardware-selectable slave addressing for multi-device bus configurations
• High-current drive capability suitable for direct LED loading

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the specific suffix 'AWE+' corresponds to the 16-pin Wide SOIC package and the extended industrial temperature range (-40°C to +125°C). Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering code matches the required lead-free packaging specifications before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when an I2C interface is required to expand general-purpose digital I/O lines. The MAX7329 variant is distinct from the MAX7328 due to its unique slave address range (0x38-0x3F), allowing mixed usage on the same bus. Verify that the system power supply remains within the 2.5V to 5.5V operational limits and that the bus capacitance does not exceed 400pF.

I/o Expanders Part Context

This device belongs to the MAX7328/MAX7329 family of pin-compatible peripherals designed for expanding microcontroller I/O capabilities. While functionally identical regarding port configuration and electrical characteristics, the MAX7329 is distinguished by its specific slave ID address range. This differentiation enables simultaneous deployment of both MAX7328 and MAX7329 devices on a single I2C bus without address conflicts.

I/o Expanders Replacement Considerations

The PCF8574A serves as a second source equivalent for the MAX7329 series. Verify compatibility regarding the specific I2C slave address mapping and timing parameters. Note that while pinouts are generally compatible, differences in internal pull-up strengths and interrupt reset behaviors may require schematic adjustments.