CYAT81658-100AS48T

Overview

The Infineon CYAT81658-100AS48T is an automotive-grade, multi-touch capacitive touchscreen controller from the TrueTouch PSoC family. It features a 32-bit Arm Cortex CPU and supports up to 48 sense pins with 560 intersections for screens up to 8.5 inches. The device operates on dual power supplies: 1.71–1.95 V and 3.0–5.5 V for logic/digital I/Os, and 3.0–5.5 V for analog supply. It achieves an average power consumption of 9 mW and typical deep-sleep power of 11 μW. Communication interfaces include I2C (up to 400 kbps) and SPI (up to 8 Mbps).

Feature Summary

• AEC Q100 qualified for automotive applications.
• Supports water rejection, wet-finger tracking, and glove operation via DualSense technology.
• Includes AutoArmor noise suppression and external display synchronization.
• Features low-power CapSense wake-up button (50 μA) and wake-on-screen (120 μA).

Applications

• Automotive infotainment systems.
• In-dash navigation displays.
• Vehicle instrument clusters.

Procurement Notes

Verify that the 'T' suffix in the part number indicates tape and reel packaging, as opposed to tray packaging for non-T versions. Confirm the 'S' suffix corresponds to the Automotive-S temperature range (-40 °C to 105 °C). Ensure compatibility with existing firmware if upgrading from previous revisions within the CYAT8165X series.

Selection Notes

Select this model for designs requiring 48 sense pins and support for thick overlays or gloves. Compare against CYAT81658-100AA48 if a lower temperature range (-40 °C to 85 °C) is sufficient. Consider CYAT81659 variants if wake-up button support is required instead of wake-on-screen functionality.

Part Context

This component belongs to the CYAT8165X/7165X series, which integrates PSoC technology for multitouch control. The product was originally developed by Cypress Semiconductor Corporation before being acquired by Infineon Technologies. The datasheet retains the original Cypress branding and documentation structure.

Replacement Considerations

CYAT81658-100AA48 offers identical electrical and functional specifications but is rated for the Automotive-A temperature range (-40 °C to 85 °C) rather than Automotive-S.

FAQ

What is the maximum screen size supported?

The controller supports screen sizes up to 8.5-inch diagonal with a 16:9 aspect ratio.

Does the device support glove interaction?

Yes, it supports ten fingers with thin gloves (≤1-mm thick) and two fingers with thick gloves (≤5-mm thick).

What are the available communication interfaces?

The device supports I2C slave at 100 and 400 kbps, and SPI slave bit rates up to 8 Mbps.