SX8675IWLTRT

Overview

The SX8675IWLTRT is a touchscreen controller IC from Semtech Corporation designed for 4-wire and 5-wire resistive touch applications. It features a 12-bit resolution with a wiper sampling rate of 40 kS/s. The device operates on an I2C serial interface and includes proximity sensing capabilities. Power supply requirements range from a minimum of 2.3 V to a maximum of 3.6 V, with an operating supply current of 120 uA. It supports an internal voltage reference and functions within a temperature range of -40°C to +85°C. The component is housed in a 20-QFN (4x4) package.

Feature Summary

• Supports 4-wire and 5-wire resistive touchscreen configurations
• Integrates proximity sensing functionality
• Provides 12-bit resolution data processing
• Utilizes I2C serial communication interface

Applications

• Resistive touchscreen control systems
• Industrial human-machine interfaces
• Embedded measurement devices

Procurement Notes

Verify the specific ordering suffix and package marking against official Semtech documentation to ensure compatibility with design requirements. Confirm that the I2C address configuration matches the system bus topology. Check for any revision differences in the datasheet that may affect electrical characteristics or pin assignments prior to final procurement decisions.

Selection Notes

Select this component when a dedicated controller for resistive touch panels is required with integrated proximity detection. Ensure the system power supply remains within the 2.3 V to 3.6 V operational window. Verify that the I2C interface speed is compatible with the host microcontroller. Consider the 20-QFN package dimensions for PCB layout constraints.

Part Context

This part belongs to Semtech's lineup of analog and mixed-signal integrated circuits focused on user interface technologies. It serves as a specialized solution for managing resistive touch inputs, distinguishing itself from capacitive controllers by supporting older or ruggedized panel types. The inclusion of proximity sensing adds value for gesture detection without physical contact.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Semtech technical support for direct replacements or cross-reference options based on specific interface and resolution requirements.