CYTMA445A-44LQI28AB

Touch Screen Controllers Overview

The CYTMA445A-44LQI28AB is a TrueTouch multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex CPU. It supports up to ten fingers with small finger detection down to 4 mm and large finger support up to 30 mm. The device operates on a digital supply of 1.71 V to 1.95 V or 2.0 V to 5.5 V, and an analog supply of 2.65 V to 4.7 V. Average power consumption is 4 mW, with typical deep-sleep power at 5.7 μW. It includes DualSense technology for water rejection and wet-finger tracking, along with ChargerArmor immunity up to 35-V peak-to-peak.

Touch Screen Controllers Feature Summary

• DualSense technology enables water rejection and wet-finger tracking capabilities.
• ChargerArmor provides noise immunity up to 35-V peak-to-peak against charger interference.
• Supports multi-touch glove operation with automatic mode switching for thin (≤1-mm) and thick (≤5-mm) gloves.
• Includes grip suppression, large object rejection, fingernail tracking, and automatic baseline tracking.

Touch Screen Controllers Applications

• Multi-touch capacitive touchscreen controllers
• Smartphones and mobile devices
• Tablets and portable electronics

Touch Screen Controllers Procurement Notes

Verify the specific ordering suffix AB indicates inclusion of DualSense water rejection features compared to the AA base part. Confirm the package type matches the 44-pin QFN specification. Ensure the sense I/O count aligns with the 28-pin configuration required for the design.

Touch Screen Controllers Selection Notes

Select this component when water resistance and glove tracking are required. The 44-pin QFN package limits SPI interface availability; use the 48-pin variant if SPI is needed. Verify that the 28 sense I/O pins meet the sensor matrix requirements for the target screen size.

Touch Screen Controllers Part Context

This part belongs to the Cypress TrueTouch Multi-Touch All-Points Controller family. It is designed for high-performance touch sensing applications requiring robust environmental handling. The CYTMA445A series integrates advanced noise suppression and gesture recognition technologies within a compact form factor.

Touch Screen Controllers Replacement Considerations

CYTMA445A-44LQI28AA serves as a base alternative without DualSense features. CYTMA445A-44LQI35AB offers increased sense I/O capability while retaining water rejection. CYTMA445A-44LQI35AE adds face detection capabilities beyond the standard feature set.