CYTMA445-48LQI36ZZAT

Touch Screen Controllers Overview

The CYTMA445-48LQI36ZZAT is a TrueTouch multi-touch capacitive touchscreen controller from Cypress Semiconductor, now part of Infineon Technologies. It features a 32-bit ARM Cortex CPU and supports up to 36 sense pins for screens up to 5.0 inches diagonal with a 16:9 aspect ratio. The device reports up to 10 fingers and operates on a 1.71-V to 5.5-V digital supply and a 2.65-V to 5.5-V analog supply. It includes DualSense water rejection, glove tracking, and ChargerArmor noise immunity. Communication interfaces include I2C (up to 3.4 Mbps) and SPI (up to 10 Mbps).

Touch Screen Controllers Feature Summary

• DualSense technology for water rejection and wet-finger tracking.
• ChargerArmor technology providing charger noise immunity up to 35 VPP.
• Supports multi-touch glove operation with automatic mode switching.
• Configurable TX frequency up to 500 kHz and refresh rates up to 300 Hz.

Touch Screen Controllers Applications

• Capacitive touchscreen controllers for mobile devices.
• Tablet computers with screen sizes up to 5.0 inches.
• Smartphones requiring high noise immunity and fast touch response.

Touch Screen Controllers Procurement Notes

Verify the specific ordering suffix ZZAT against current manufacturer documentation to confirm custom development status and tape-and-reel packaging. Confirm availability through authorized Infineon or Cypress distributors as this component may be subject to limited production runs.

Touch Screen Controllers Selection Notes

Select this model for applications requiring support for up to 36 sense pins and 10 simultaneous touch points. Ensure the design accommodates the required 48-pin QFN package dimensions and voltage ranges. Verify compatibility with the target display stackup and sensor pattern before finalizing the selection.

Touch Screen Controllers Part Context

This component belongs to the CYTMA445 TrueTouch family of multi-touch all-points controllers. It is designed to replace older resistive or single-point capacitive solutions in modern consumer electronics, offering advanced gesture recognition and environmental robustness.

Touch Screen Controllers Replacement Considerations

Direct replacements within the same family include CYTMA445-48LQI36AEA(T) or CYTMA445-48LQI36ACA(T), which offer similar pin counts but different feature sets regarding glove and water rejection capabilities.

Touch Screen Controllers FAQ

What is the maximum number of simultaneous touch points supported?

The CYTMA445-48LQI36ZZAT supports reporting up to 10 simultaneous fingers.

Does this controller support operation with gloves?

Yes, it supports multi-touch glove operation with automatic mode switching for thin gloves up to 1 mm thick.

What communication interfaces are available?

The device supports I2C slave at standard bit rates up to 3.4 Mbps and SPI slave at bit rates up to 10 Mbps.