CYTMA525-49FNI25ZZT

Overview

The CYTMA525-49FNI25ZZT is a TrueTouch Multi-Touch All-Points Touchscreen Controller featuring a 32-bit ARM Cortex CPU. It supports up to 25 sense pins with a 154 intersection matrix for screens up to 3.0 inches. The device reports up to four simultaneous fingers and includes ChargerArmor technology for noise immunity up to 60-V peak-to-peak. Power specifications include a 1.71- to 5.5-V digital supply, a 2.65- to 5.5-V analog supply, 5.6-mW average power consumption, and 4.5-μW typical deep-sleep power.

Feature Summary

• DualSense technology for water rejection and wet-finger tracking
• Supports passive stylus, fingernail tracking, and hover finger detection
• I2C slave interface supporting bit rates up to 3.4 Mbps
• SPI slave interface supporting bit rates up to 10 Mbps

Applications

• Smartphones and mobile devices
• Portable media players
• Small consumer electronics with capacitive touch interfaces

Procurement Notes

Verify the package type matches the required footprint; this specific part number utilizes a 49-ball WLCSP (0.4-mm ball pitch). Confirm that the ordering suffix ZZ indicates custom development parameters rather than standard commercial availability. Ensure the design accommodates the specified voltage ranges for both digital and analog supplies.

Selection Notes

Select this component for applications requiring support for up to 25 sense pins and four-finger multi-touch input on displays up to 3.0 inches diagonal. Consider the 49-ball CSP package if board space constraints require a 3.085 × 3.25 mm footprint. Verify compatibility with the target operating system driver support, noting the removal of Windows Phone 8 drivers in revision *A.

Part Context

This controller belongs to the Cypress TrueTouch family of multi-touch all-points controllers. It integrates an ARM Cortex processor and CapSense buttons within a single chip. The device replaces older models like the CYTMA525-49FNI25ABT and adds features such as passive stylus support while maintaining backward compatibility with existing sensor patterns like Manhattan and SLIM.

Replacement Considerations

The CYTMA525-48BUI25ZZ(T) serves as a functional alternative offering identical electrical performance but housed in a 48-ball UFBGA package instead of the 49-ball CSP.

FAQ

What is the maximum screen size supported by this controller?

The controller supports screen sizes up to 3.0-inch diagonal with a 4:3 aspect ratio using a 4.3-mm electrode pitch.

Does the CYTMA525-49FNI25ZZT support glove operation?

Yes, the device includes automatic mode switching for multi-touch glove operation.

How does the device handle charger noise interference?

It utilizes ChargerArmor technology to provide immunity to charger noise up to 60-V peak-to-peak, including AT&T Zero and Duracell charger noise.