MAX7315AUE+

Overview

The MAX7315AUE+ is an I2C/SMBus-compatible serial peripheral providing eight configurable I/O ports and a ninth interrupt or general-purpose output. It operates on a 2V to 3.6V supply with outputs rated for 5.5V tolerance and up to 50mA sink current. The device integrates 8-bit PWM LED intensity control, featuring global coarse adjustment and individual fine-tuning per port. It supports hot insertion, transition detection with interrupt generation, and offers low standby current of 1.2µA typical. The component is housed in a 3mm x 3mm Thin QFN package.

Feature Summary

• Integrates 8-bit PWM LED intensity control with global and individual port settings
• Supports hot insertion with high-impedance protection during power-down
• Provides transition detection with automatic interrupt output generation
• Features 5.5V tolerant open-drain outputs capable of driving LEDs directly

Applications

• LCD backlights
• LED status indication
• Keypad backlights
• RGB LED drivers

Procurement Notes

Verify the suffix 'UE+' indicates the specific 16-pin Thin QFN package variant (-40°C to +125°C) as listed in the ordering information. Confirm the datasheet revision matches the technical specifications required for your design. Ensure the supplier provides traceability documentation consistent with Maxim Integrated/Analog Devices standards.

Selection Notes

Select this part when an I2C interface is required for expanding GPIO capabilities alongside integrated LED dimming functions. It is suitable for applications needing 5.5V tolerant outputs while operating from lower voltage logic supplies. Consider the pin and software compatibility with PCA9534 and PCA9554 if migrating from those devices.

Part Context

This component belongs to the MAX7315 family of 8-port I/O expanders. The 'A' designation typically denotes an improved version or specific manufacturing lot within the series. The '+'' suffix indicates lead-free compliance according to RoHS standards. It serves as a bridge between microprocessors and peripheral devices requiring direct drive capabilities.

Replacement Considerations

The MAX7315 is pin and software compatible with the PCA9534 and PCA9554(A). These NXP components can serve as functional substitutes in designs where I2C expansion is needed without the integrated PWM features.