CYTMA545-48LQI36BB

Overview

The CYTMA545-48LQI36BB is a TrueTouch multi-touch capacitive touchscreen controller from Cypress Semiconductor. It integrates a 32-bit ARM Cortex CPU and supports up to 36 sense pins for screens up to 5.0 inches diagonal. The device features DualSense water rejection, glove tracking (up to 10 fingers with thin gloves), passive stylus support, and hover sensing. It operates on a 1.71V to 5.5V digital supply and 2.65V to 5.5V analog supply, consuming 5.6mW average power. Communication interfaces include I2C up to 3.4 Mbps and SPI up to 10 Mbps.

Feature Summary

• DualSense technology for water rejection and wet finger tracking
• Supports passive stylus input with palm rejection
• Glove mode supporting up to 10 fingers with thin gloves (≤1 mm) or 2 fingers with thick gloves (≤5 mm)
• ChargerArmor noise immunity up to 60 VPP

Applications

• Smartphones and mobile devices requiring multi-touch capabilities
• Tablets and portable electronics with glove or stylus interaction needs
• Industrial control panels operating in wet or high-noise environments

Procurement Notes

Verify the specific ordering suffix BB confirms the inclusion of both DualSense water rejection and stylus/glove support features as defined in the Cypress ordering guide. Confirm package availability in the 48-pin QFN format and check for tape and reel options if indicated by a trailing T in the part number.

Selection Notes

Select this model when design requirements include simultaneous support for water resistance, passive stylus input, and multi-finger glove operation. Ensure the host system can accommodate the required 48-pin QFN footprint and that the interface speeds (I2C/SPI) match the application's data throughput needs.

Part Context

This component belongs to the CYTMA545 TrueTouch family, which provides all-points touch sensing solutions. The 'BB' suffix specifically denotes a configuration that combines base features with DualSense water rejection and advanced input modes for gloves and styluses, distinguishing it from base or custom variants.

Replacement Considerations

Direct replacements within the same feature set are limited to other CYTMA545 variants with compatible pinouts. Verify if lower-tier models like CYTMA545-48LQI36AB lack the necessary stylus support or if higher-tier custom kits offer unnecessary complexity for the specific application.