CYTT21100-48LQI36T

Overview

The CYTT21100-48LQI36T is a multi-touch capacitive touchscreen controller from the TrueTouch family, originally manufactured by Cypress Semiconductor. It features a 32-bit ARM Cortex CPU and supports up to 36 sense pins with 308 intersections (22 × 14). The device reports up to ten fingers and supports screen sizes up to 5.0-inch diagonal. Power consumption averages 4 mW, with typical deep-sleep power at 5.7 μW. Digital and I/O supplies range from 1.71–1.95 V or 2.0–5.5 V, while the analog supply ranges from 2.65–4.7 V.

Feature Summary

• Multi-touch support for up to 10 fingers with automatic baseline tracking
• ChargerArmor technology providing immunity up to 35-V peak-to-peak noise
• DualSense technology enabling water rejection and wet-finger tracking
• Flexible TX/RX configurations supporting various sensor patterns including SLIM and metal mesh

Applications

• Smartphones and tablets
• Navigation systems
• Industrial controls
• Medical devices
• Home appliances

Procurement Notes

Verify component authenticity as Cypress Semiconductor was acquired by Infineon Technologies. Confirm package details match the 48-pin 6 × 6 × 0.6-mm QFN specification. Ensure firmware compatibility with Android drivers if applicable. Check for updated documentation reflecting the acquisition history.

Selection Notes

Select this model for applications requiring up to 36 sense pins and 10-point touch capability. Consider the CYTT21401 variant if glove tracking is required. Verify interface requirements; SPI is only available in the 48-pin package. Ensure power supply constraints align with the specified digital and analog voltage ranges.

Part Context

This component belongs to the CYTT21XXX series of TrueTouch controllers. It is part of a broader portfolio that includes variants with different pin counts (28, 33, 35) and feature sets. The series is designed for low-end to mid-range applications across white goods, home appliances, and consumer electronics.

Replacement Considerations

Direct replacements within the same family include CYTT21100-44LQI33(T) and CYTT21100-44LQI35(T), which offer fewer sense pins. For enhanced features like glove tracking, consider CYTT21401-48LQI36(T). Verify pinout and software compatibility before substitution.

FAQ

Does the CYTT21100-48LQI36T support glove tracking?

No, the CYTT21100-48LQI36T does not support glove tracking. This feature is available in the CYTT21401 and CYTT21403 variants.

What communication interfaces are supported?

The device supports I2C slave at 100 and 400 kbps. SPI slave support is available but only in the 48-pin QFN package.

What is the maximum refresh rate?

The maximum refresh rate is up to 300 Hz, though other rates are configurable based on system requirements.