Infineon Technologies CYTMA568-56LQI44BBT

Overview

CYTMA568-56LQI44BBT from Cypress Semiconductor is a multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex™ CPU, 44 sense I/O pins, DualSense™ water/wet-finger rejection, passive stylus support (1-mm), and glove tracking (up to 5-mm thickness). It delivers up to 230 Hz refresh rate, 500 kHz TX frequency, and 13 ms first-touch response for 6.0-inch diagonal touchscreens with Manhattan or Diamond sensor patterns.

For engineers reviewing the CYTMA568-56LQI44BBT datasheet, CYTMA568-56LQI44BBT pinout, CYTMA568-56LQI44BBT application, or CYTMA568-56LQI44BBT equivalent, this device supports I²C/SPI interfaces, ChargerArmor™ noise immunity (20 VPP), automatic baseline tracking, and Android™ driver integration in industrial-grade QFN packaging.

Technical Context

The CYTMA568-56LQI44BBT implements mutual capacitance sensing with configurable TX/RX routing for single-layer FPC designs, supporting up to 777 node intersections (21 × 37) and 10-finger reporting. Its ARM Cortex™ core executes firmware for real-time touch processing, hover detection, and palm rejection logic.

DualSense™ enables simultaneous wet-finger and water rejection via differential sensing, while ChargerArmor™ integrates adaptive filtering against battery charger noise up to 20 VPP. The device uses register-configurable TX slew rate and external display synchronization for timing-critical AMOLED/LCD integration.

Key Specifications

Pinout & Package

Package: 56-pin QFN (6 × 6 × 0.6 mm, 0.35 mm lead pitch), exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-touch capacitive touchscreen controller applications.

Compared with TMA463-0101 and MAXT336U, CYTMA568-56LQI44BBT uniquely combines 44-pin QFN packaging, 5-mm glove support, and on-die ChargerArmor™-enabling single-chip robustness in harsh, high-noise, and wet environments without external filtering or firmware workarounds.

Availability

CYTMA568-56LQI44BBT is available at Aetrix Electronics and suitable for smartphone touch interfaces, industrial HMI panels, medical tablet interfaces, and automotive infotainment displays requiring stable component supply across extended product lifecycles.

Supply support for CYTMA568-56LQI44BBT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor Corporation, now part of Infineon Technologies, designs high-performance mixed-signal ICs for embedded control, connectivity, and human interface applications.

The CYTMA568 product line targets high-reliability capacitive touch systems requiring noise immunity, environmental resilience, and Android/Linux driver readiness - specifically engineered for consumer, industrial, and automotive touchscreens with demanding EMI and moisture conditions.

FAQ

What is the maximum supported sensor pitch for CYTMA568-56LQI44BBT?

The device supports 5-mm sensor pitch for 6.0-inch diagonal screens with 16:9 aspect ratio using Manhattan or Diamond electrode patterns. This configuration enables optimal SNR and finger separation resolution while maintaining compatibility with standard ITO or metal-mesh sensor stackups on glass or PET substrates.

Does CYTMA568-56LQI44BBT require external crystal or oscillator?

No. The CYTMA568-56LQI44BBT integrates a precision internal RC oscillator for system clock generation and does not require an external crystal. Its internal timing circuitry meets ±2% accuracy over industrial temperature range (-40°C to +85°C) for touch scan and communication timing.

Can CYTMA568-56LQI44BBT operate with a 1.8-V I/O supply?

Yes. The VDDIO supply accepts 1.71–5.5 V, fully supporting 1.8-V logic levels. I²C and SPI interfaces are compatible with 1.8-V host processors without level-shifting, and the INT and RST pins tolerate 1.8-V signaling thresholds per datasheet specifications.

Is hover detection functional with wet fingers or water on screen?

No. Hover detection is disabled during active water rejection mode. The DualSense™ architecture prioritizes reliable wet-finger tracking and false-trigger suppression over proximity sensing when moisture is detected, ensuring UI stability in rainy or high-humidity conditions.