CYTMA448-56LQI44AA

Overview

The CYTMA448-56LQI44AA is a TrueTouch multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex CPU. It supports up to 10 fingers with a refresh rate of 230 Hz and fast first-touch response under 13 ms. The device operates on a 1.71-V to 5.5-V digital supply and 2.65-V to 5.5-V analog supply, consuming 8.5 mW average power. It includes ChargerArmor for noise immunity up to 20 V peak-to-peak and DualSense technology for water rejection. Communication interfaces include I2C at rates up to 3.4 Mbps and SPI up to 8 Mbps.

Feature Summary

• ChargerArmor™ provides charger noise immunity up to 20 volts peak-to-peak (VPP).
• DualSense™ technology enables water rejection and wet-finger tracking.
• Supports multi-touch glove operation with automatic mode switching for thin (≤1 mm) and thick (≤5 mm) gloves.
• Integrated bootloader allows field upgrades via software.

Applications

• Multi-touch capacitive touchscreen systems.
• Devices requiring high charger noise immunity.
• Applications utilizing Android drivers.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm feature sets such as ChargerArmor or DualSense capabilities. Ensure the package type matches the required PCB layout constraints. Confirm RoHS compliance status through official datasheets before procurement.

Selection Notes

Select this component for applications requiring support for up to 10 simultaneous touch points and high-speed communication interfaces. Consider the 56-pin QFN package dimensions (6 × 6 × 0.6 mm) for space-constrained designs. Evaluate power requirements against the specified 8.5 mW active and 15 μW deep-sleep consumption levels.

Part Context

The CYTMA448 belongs to the TrueTouch Multi-Touch All-Points Controller family developed by Cypress Semiconductor Corporation. This series is designed for high-performance touch sensing applications, integrating advanced noise suppression and environmental adaptation technologies within a compact form factor.

Replacement Considerations

Consult official replacement lists from Infineon Technologies or authorized distributors for verified cross-references. Verify pin compatibility and electrical specifications before substituting any alternative components.

FAQ

What is the maximum number of touch points supported?

The controller reports up to 10 simultaneous touch points.

Does the device support glove interaction?

Yes, it supports multi-touch glove operation with automatic mode switching for thin gloves up to 1 mm and thick gloves up to 5 mm in thickness.

What is the charger noise immunity level?

The integrated ChargerArmor™ technology provides immunity up to 20 volts peak-to-peak (VPP).