CYTMA445-44LQI33ZZA

Overview

The CYTMA445-44LQI33ZZA is a TrueTouch multi-touch all-points touchscreen controller featuring a 32-bit ARM Cortex CPU. It supports up to 33 sense pins and reports up to 10 simultaneous touch points on screens up to 4.5 inches diagonal with a 4.8-mm sensor pitch. The device operates on a 1.71-V to 5.5-V digital supply and a 2.65-V to 5.5-V analog supply, consuming 6.75 mW average power and 4.5 μW in deep-sleep mode. It includes DualSense water rejection, glove tracking, and ChargerArmor noise immunity.

Feature Summary

• Multi-touch capacitive control supporting up to 10 fingers with automatic glove mode switching
• DualSense technology for water rejection and wet-finger tracking
• ChargerArmor noise immunity providing protection against up to 35 VPP charger noise
• Flexible communication via I2C (up to 3.4 Mbps) or SPI (up to 10 Mbps)

Applications

• Smartphones and mobile devices requiring high-performance touch input
• Tablets and portable media players with displays up to 4.5 inches
• Industrial HMI panels requiring glove and water resistance

Procurement Notes

Verify the specific ordering suffix ZZ indicates custom development parameters distinct from standard base parts. Confirm package dimensions match the 44-pin 5 × 5 × 0.6-mm QFN specification. Ensure design compatibility with the required 33 sense pin configuration and 4.8-mm sensor pitch for the target screen size.

Selection Notes

Select this part for applications requiring custom firmware or specific hardware configurations not covered by standard AA, AB, AC, or AE variants. Compare against CYTMA445-44LQI33AEA if standard glove and water rejection features are sufficient without custom requirements. Verify that the 44-pin QFN footprint aligns with the PCB layout constraints.

Part Context

This component belongs to the Cypress TrueTouch Multi-Touch All-Points Controller family. It shares core architecture with other CYTMA445 variants but differs in its specific feature set defined by the ZZ suffix. It is designed to replace older single-layer or limited multi-touch controllers in modern consumer electronics.

Replacement Considerations

Standard equivalents include CYTMA445-44LQI33AEA for identical physical packages with verified glove and water rejection features. CYTMA445-44LQI33AAA serves as a baseline alternative without advanced environmental protections.