MAX7318AUG+TG069

Overview

The MAX7318AUG+ is a 2-wire-interfaced, 16-bit I/O port expander designed for SMBus and I2C applications. It provides 16 configurable input/output ports with an open-drain interrupt output. The device operates within a supply voltage range of 2V to 5.5V and supports clock frequencies up to 400kHz. It features hot-insertion protection, allowing pins to remain high-impedance with up to 6V asserted during power-down. The component includes polarity inversion registers and six address select pins for 64 unique slave IDs. It is specified for operation from -40°C to +125°C and is housed in a 24-pin TSSOP package.

Feature Summary

• Supports hot insertion with high-impedance state on all pins when powered down
• Configurable 16-bit I/O ports with internal pullups and polarity inversion
• I2C-compatible serial interface with noise filtering on SCL/SDA inputs
• Open-drain interrupt output triggered by input state changes

Applications

• Servers
• RAID Systems
• Industrial Control
• Medical Equipment
• PLCs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the supplier provides documentation matching the MAX7318AUG+ designation. Cross-reference the pinout and electrical specifications with the official Maxim Integrated data sheet before integration into the design.

Selection Notes

Select this component when 16 general-purpose I/O lines are required with I2C connectivity. It is suitable for systems needing hot-swap capability and wide operating voltage ranges. Consider the TSSOP package constraints and thermal dissipation requirements for the specific PCB layout. Verify that the system master can support the required I2C timing parameters.

Part Context

The MAX7318 belongs to the Maxim Integrated I/O expander family, offering parallel port expansion via a serial interface. It complements other devices like the MAX7311 and MAX7312 by providing similar functionality with specific feature sets such as hot-insertion protection. The AUG suffix denotes the 24-pin Thin Shrink Small Outline Package (TSSOP) variant.

Replacement Considerations

The MAX7318AAG+ is a direct replacement using the SSOP package. The MAX7318AWG+ utilizes the Wide SO package. The MAX7318ATG+ offers the same functionality in a 4mm x 4mm Thin QFN package. All variants share identical electrical characteristics and register maps.