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Product Detailed Parameters
- Description：IC MCU 32BIT 56QFN
- Series：TrueTouch™
- Mfr：Infineon Technologies
- Package：Tray
- Touchscreen：2 Wire Capacitive
- Resolution (Bits)：32 b
- Interface：I2C, SPI
- Voltage Reference：-
- Voltage - Supply：1.71V ~ 5.5V
- Operating Temperature：-
- Mounting Type：Surface Mount
- Package / Case：56-UFQFN Exposed Pad
- Supplier Device Package：56-QFN (6x6)
- Current - Supply：-
- Grade：-
- Qualification：-
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Overview
The CYTMA568-56LQI44BB is a TrueTouch multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex CPU. It supports up to 44 sense I/O pins for screens up to 6.0 inches diagonal with a 5-mm sensor pitch. 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 12 mW average power. Key features include ChargerArmor noise immunity, DualSense water rejection, passive stylus support, glove tracking, and hover detection. Communication interfaces include I2C (up to 3.4 Mbps) and SPI (up to 8 Mbps).
Feature Summary
- Integrated 32-bit ARM Cortex CPU with register configuration capabilities.
- Advanced noise suppression including ChargerArmor (20 V peak-to-peak immunity) and external display synchronization.
- DualSense technology for water rejection and wet-finger tracking.
- Supports 10 fingers with thin gloves, 2 fingers with thick gloves, passive stylus, and hover finger tracking.
Applications
- Smartphones and mobile devices requiring high touch accuracy.
- Tablets and portable electronics with in-cell or on-cell displays.
- Industrial HMI panels needing glove and stylus operation.
Procurement Notes
Verify the ordering suffix 'BB' confirms the inclusion of ChargerArmor, DualSense, passive stylus, and glove tracking features. Confirm the package type matches the 56-pin QFN specification. Ensure the industrial temperature range ('I') aligns with system requirements. Check for tape and reel availability if indicated by a trailing 'T'.
Selection Notes
Select this part for applications requiring simultaneous glove, stylus, and hover functionality alongside robust charger noise immunity. The 44-sense pin count limits screen size to approximately 6.0 inches diagonal at 5-mm pitch. Verify that the host processor supports the required I2C or SPI bit rates for data transfer.
Part Context
This component belongs to the Cypress TrueTouch TMA family of multi-touch all-points controllers. It is designed as an upgrade path for systems requiring enhanced environmental robustness against water and charging interference compared to standard mutual capacitance controllers.
Replacement Considerations
Direct replacements within the same feature set are limited. The CYTMA568-56LQI44AA(T) lacks DualSense and glove support. The CYTMA568-56LQI44CB(T) adds hover capability but may require firmware adaptation. Cross-family migration requires re-evaluation of pinout and software drivers.
FAQ
What is the maximum screen size supported by the 44-sense version?
The 44-sense version supports screens up to 6.0 inches diagonal with a 5-mm sensor pitch and 16:9 aspect ratio.
Does this controller support passive stylus input?
Yes, the 'BB' suffix indicates support for a 1-mm passive stylus with palm rejection.
How does the device handle charger noise?
It utilizes ChargerArmor technology, providing immunity up to 20 volts peak-to-peak, including AT&T Zero chargers.
