SX8674ICSTRT

Overview

The SX8674ICSTRT is a resistive touch screen controller manufactured by Semtech. It supports 4-wire and 5-wire resistive touch interfaces with integrated proximity sensing capabilities. The device operates on a supply voltage range of 2.3 V to 3.6 V, drawing an operating supply current of 120 uA. It features a wiper sampling rate of 40 kS/s and provides 12-bit resolution for touch coordinate detection. Communication with the host system is handled via an I2C interface. The component is designed for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Supports 4-Wire/5-Wire resistive touch screens with I2C interface
• Integrated proximity sensing functionality
• 12-bit resolution with 40 kS/s wiper sampling rate
• Low power consumption with 120 uA operating supply current

Applications

• Mobile devices requiring resistive touch input
• Industrial equipment with ruggedized touch interfaces
• IoT devices utilizing low-power sensor integration

Procurement Notes

Verify the specific ordering suffix and package type against the official Semtech datasheet before procurement. Confirm that the I2C address configuration meets system requirements. Ensure the supply voltage provided to the circuit remains within the 2.3 V to 3.6 V operational limits to guarantee correct functionality and avoid damage to the controller.

Selection Notes

Select this component when a resistive touch solution with proximity detection is required. The 12-bit resolution offers precise coordinate tracking suitable for detailed input applications. The wide operating temperature range makes it suitable for industrial environments. Verify compatibility with the target I2C bus speed and ensure the PCB layout accommodates the specific package dimensions provided in the mechanical drawings.

Part Context

This part belongs to the Semtouch family of touch screen controllers from Semtech Corporation. These components are designed to provide reliable touch input processing for embedded systems. The SX8674 specifically targets applications needing both touch and proximity detection in a single integrated circuit, reducing bill of materials complexity compared to discrete solutions.

Replacement Considerations

Consult Semtech documentation for direct pin-to-pin replacements or functional equivalents within the same product line. Verify that any substitute component maintains compatibility with 4-wire/5-wire resistive interfaces and I2C communication protocols.