XRA1403IL24-F

Overview

The XRA1403IL24-F is a 16-bit SPI GPIO expander manufactured by MaxLinear. It operates within a supply voltage range of 1.65 V to 3.6 V and supports a maximum SPI clock frequency of 26 MHz. The device features 16 general-purpose I/Os with open-drain outputs capable of sourcing up to 160 mA total current. It includes internal 100 kΩ pull-up resistors on each I/O pin, which can be individually enabled or disabled. The component provides interrupt functionality with programmable edge detection for rising, falling, or both edges. It is housed in a 24-pin QFN package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Configurable internal pull-up resistors allow individual control of input states and support three-state output modes for remote device isolation.
• Programmable interrupt logic supports edge-triggered generation and clearing via input state changes or register reads.
• Input polarity inversion capability enables flexible signal interpretation without external hardware modifications.

Applications

• Systems requiring expansion of digital input/output lines via SPI interface
• Applications needing isolated GPIO control for remotely powered peripheral devices
• Embedded controllers managing multiple sensors or switches with interrupt-driven polling

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package integrity and moisture sensitivity handling procedures prior to assembly. Review manufacturer discontinuance notifications for timeline constraints. Ensure design-in compatibility with existing SPI controller drivers and interrupt routing schemes before finalizing procurement decisions.

Selection Notes

Select this component when 16 bidirectional I/O lines are required with SPI connectivity. Consider the 1.65 V to 3.6 V operating range for low-voltage system integration. Evaluate the 26 MHz clock speed against processor throughput requirements. Assess the need for configurable pull-ups and interrupt features versus simpler expander alternatives.

Part Context

This part belongs to the XRA1403 series of SPI GPIO expanders from MaxLinear. It shares functional similarities with other members like the XRA1405IL24-F but may differ in specific configuration options or packaging variants. The series targets applications demanding flexible digital I/O management with minimal pin count overhead on the host microcontroller.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family. Verify electrical parameter equivalence for voltage, current, and interface timing. Confirm software driver compatibility if migrating between different expander models.