SX1511BIULTRT

Overview

The SX1511BIULTRT is an 8-bit I/O expander manufactured by Semtech Corporation. It features an SPI interface operating at a clock frequency of 20 MHz. The device provides world's lowest voltage level shifting GPIO capabilities, integrated LED driver functionality, and keypad scanning support. It is housed in a 20-QFN-UT (3x3) package.

Feature Summary

• Integrated LED driver for display control
• Keypad scanning capability
• Low voltage level shifting GPIO

Applications

• Mobile platform connectivity
• Consumer electronics interfaces
• Industrial equipment control

Procurement Notes

Verify the obsolete status of this component before integration. Confirm availability through authorized distributors or secondary markets. Ensure the 20-QFN-UT package dimensions match the PCB footprint. Check for recent PCN updates regarding assembly or supplier changes to maintain supply chain stability.

Selection Notes

Select this part for applications requiring low-voltage level shifting with integrated peripheral control. Compare against the SX1509 series if I2C interface is preferred over SPI. Evaluate pin count requirements as this model offers only 8 bits of expansion. Consider the 20 MHz speed limit for high-frequency bus operations.

Part Context

This component belongs to the SX15xxB family of advanced communications and sensing ICs from Semtech. These devices are designed for portable and mobile applications requiring efficient I/O management. The family emphasizes low power consumption and compact packaging solutions for space-constrained designs.

Replacement Considerations

Public confirmed substitute part numbers: None identified.