MAX7315AUE+T

Overview

The MAX7315AUE+T 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, capable of sinking up to 50mA per port. The device integrates 8-bit PWM current drive for LED intensity control, featuring global coarse adjustment and individual fine-tuning steps. It supports hot insertion, transition detection with interrupt output, and offers low standby current. The component is housed in a 3mm x 3mm Thin QFN package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates 8-bit PWM current drive with global and individual LED intensity control capabilities
• Supports hot insertion with high-impedance state during power-down conditions
• Provides transition detection logic with dedicated interrupt output functionality
• Features open-drain outputs rated at 5.5V tolerant with 50mA maximum sink current

Applications

• LCD Backlights
• LED Status Indication
• Keypad Backlights
• RGB LED Drivers

Procurement Notes

Verify the suffix '+T' indicates tape-and-reel packaging when sourcing. Confirm the 'A' designation aligns with the specific revision requirements for your design. Ensure the manufacturer source matches Analog Devices Inc. or Maxim Integrated to guarantee authenticity. Cross-reference the part number against official distributor catalogs to validate availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when an I2C interface is required for expanding GPIO lines with integrated LED driving capabilities. It is suitable for designs needing independent blink timing and multi-level PWM intensity control without external drivers. Consider the 5.5V output tolerance if interfacing with higher voltage loads while maintaining a lower core supply voltage. Verify that the 3mm x 3mm package footprint fits within the available PCB area constraints.

Part Context

This device belongs to the MAX7315 family of 8-port I/O expanders. It is pin and software compatible with PCA9534 and PCA9554(A) devices, facilitating direct replacements in existing designs. The MAX7315ATE variant shares identical electrical characteristics but may differ in packaging or reel specifications. The family focuses on integrating GPIO expansion with display backlighting controls in portable electronics.

Replacement Considerations

The MAX7315 is explicitly documented as pin and software compatible with the PCA9534 and PCA9554(A). These parts can serve as functional substitutes in designs where specific MAXIM branding is not mandatory. Verify that the substitute part meets the same 5.5V output tolerance and 50mA sink current requirements.