CYTMA545-48LQI36AA

Overview

The CYTMA545-48LQI36AA is a TrueTouch multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex CPU. It supports up to 36 sense pins and 10 simultaneous fingers on screens up to 5.0 inches diagonal. The device operates with a digital supply of 1.71 V to 5.5 V and an analog supply of 2.65 V to 5.5 V, consuming 5.6 mW average power. Communication interfaces include I2C (up to 3.4 Mbps) and SPI (up to 10 Mbps). It provides high noise immunity via ChargerArmor technology and includes features such as hover sensing, face detection, and automatic baseline tracking.

Feature Summary

• Multi-touch support for up to 10 fingers with hover finger sensing and passive stylus palm rejection
• ChargerArmor technology providing charger noise immunity up to 60 V peak-to-peak
• Integrated 32-bit ARM Cortex CPU with register configurability and bootloader field upgrades
• DualSense water rejection and wet finger tracking capabilities

Applications

• Smartphones and mobile devices requiring multi-touch input
• Tablets and portable consumer electronics
• Industrial control panels with glove or stylus operation requirements
• Automotive infotainment systems

Procurement Notes

Verify the specific ordering suffix against Cypress documentation to confirm package type and feature set. Confirm RoHS compliance status prior to procurement. Ensure the selected variant matches the required screen size and sensor pitch specifications for the target application design.

Selection Notes

Select this model for applications requiring up to 36 sense pins and support for screens up to 5.0 inches diagonal. Choose variants with 'BB' or 'ZZ' suffixes if glove tracking, stylus support, or custom development features are required. Verify that the host system supports the necessary I2C or SPI communication speeds.

Part Context

The CYTMA545 belongs to the TrueTouch Advanced family of all-points touchscreen controllers from Cypress Semiconductor. This series integrates processing capabilities directly into the touch controller, reducing system complexity compared to discrete solutions. The part number indicates a 48-pin QFN package with 36 sense pins.

Replacement Considerations

Direct replacements within the same family include CYTMA545-44LQI33AA for smaller screens or CYTMA545-48LQI36AB for models with water rejection. Cross-family migration requires verification of pin compatibility and firmware adaptation.