MAX7316AEE+T

Overview

The MAX7316AEE+T is a general-purpose I/O expander manufactured by Analog Devices Inc. under the Maxim Integrated brand. It provides eight 5V-tolerant input/output ports, one output-only port, and one input-only port via a 400kHz 2-wire SMBus and I²C compatible serial interface. The device powers up as inputs in the default state, with configuration managed by the master. It features integrated 8-bit PWM brightness control for LED outputs, simplifying intensity adjustments. The component operates within a supply voltage range of 2.3V to 5.5V and supports an industrial temperature range.

Feature Summary

• Provides eight 5V-tolerant I/O ports alongside dedicated input and output ports for flexible system integration.
• Integrates 8-bit PWM brightness control to manage LED output intensity globally or individually.
• Configurable interrupt output capability on the dedicated output-only port for efficient transition detection.

Applications

• Microprocessor and MCU peripheral expansion in embedded systems
• LED lighting control and brightness management applications
• General-purpose I/O expansion for portable electronic devices

Procurement Notes

Verify the specific suffix 'AEE' against official datasheets to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer documentation. Ensure compatibility with existing I2C/SMBus bus protocols before procurement. Validate that the 5V tolerance requirements match the target system logic levels.

Selection Notes

Select this component when 5V-tolerant I/O expansion is required alongside integrated LED dimming capabilities. Consider the 400kHz clock speed limit for high-speed communication needs. Evaluate the pin count and package constraints against the PCB layout requirements. Verify that the interrupt functionality meets the system's latency requirements for input transitions.

Part Context

The MAX7316 belongs to the Maxim Integrated family of I/O expanders designed for low-pin-count microcontrollers. It addresses the need for additional digital I/O lines without increasing processor pin usage. The inclusion of PWM controls distinguishes it from basic GPIO expanders, allowing direct LED driving. This series is commonly used in consumer electronics and industrial control panels.

Replacement Considerations

Check for MAX7316 variants with different suffixes indicating package changes. Verify if newer generations from Analog Devices offer improved power consumption or additional ports. Ensure any substitute maintains the same 5V tolerance and I2C/SMBus compatibility.