SX8652ICSTRT

Overview

The SX8652ICSTRT is a low-power touchscreen controller designed for 4-wire and 5-wire resistive touch screens. It features a 12-bit SAR ADC operating at up to 74k SPS, enabling coordinate throughput of 5000 coordinates/second with averaging. The device operates on a single supply voltage ranging from 1.65V to 3.7V. Current consumption is 23µA at 1.8V and 8kSPS, with a shutdown mode drawing less than 1µA. It includes integrated ESD protection rated at ±15kV HBM and ±15kV Contact Discharge on touchscreen pins.

Feature Summary

• Integrated 12-bit SAR ADC with on-chip data averaging algorithms to reduce host loading and suppress noise.
• Robust on-chip ESD protection up to ±15kV (HBM and Contact Discharge) on X+, X-, Y+, Y- pins.
• Four programmable operation modes: Manual, Automatic, Pen Detect, and Pen Trigger.
• Supports both 4-wire and 5-wire resistive touch screen interfaces with pressure measurement capability for 4-wire configurations.

Applications

• PDAs and portable instruments
• Point-of-sales terminals
• Touch-screen monitors

Procurement Notes

Verify the package type matches the application requirements, as the SX8652 series is available in both 14-lead DFN and 12-ball WLCSP formats. Confirm that the specific ICSTRT suffix corresponds to the WLCSP package variant when sourcing components. Ensure compatibility with the host system's SPI interface timing specifications before integration.

Selection Notes

Select this component for applications requiring extremely low power consumption and high reliability in space-constrained designs. The WLCSP package is suitable for small form factor devices. Consider the 4-wire interface if touch pressure measurement is required, as the 5-wire interface does not support this feature. Verify that the host processor supports the required SPI clock frequency and data rates.

Part Context

The SX8652 is part of Semtech's advanced communications and sensing portfolio, specifically targeting low-power touch interface solutions. It is designed to replace external ESD protection devices due to its robust internal protection mechanisms. The device supports Windows CE 6.0 and Linux drivers, facilitating integration into various embedded operating systems.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Designers should consult official Semtech documentation for potential obsolescence notices or recommended upgrades within the product family.