CY8CTMA340-48LQI-09T

Application Specific Microcontrollers Overview

The CY8CTMA340-48LQI-09T is a TrueTouch® Multi-Touch All-Points Touchscreen Controller manufactured by Cypress Semiconductor. It supports up to four independent fingers and tracks up to 252 intersections via 32 sense pins, accommodating screens up to 4.5 inches diagonal. The device operates with a digital supply voltage of 1.71 V to 3.6 V and an analog supply voltage of 2.7 V to 3.6 V. It features I2C (up to 400 kHz) and SPI (2 Mbps) communication interfaces. Key performance metrics include a noise-free resolution of 0.1 mm, accuracy of 0.5 mm, and refresh rates exceeding 60 Hz. Power consumption is less than 1.3 mA in the low-power state and 1 µA in deep sleep.

Application Specific Microcontrollers Feature Summary

• Tracks up to four fingers independently with ghost-free tracking
• Supports up to 32 sense pins for 252 intersections on screens up to 4.5 inches
• Includes Charger Armor™ technology for battery charger noise immunity
• Features Smart noise suppression for LCD, common-mode, and RF environments

Application Specific Microcontrollers Applications

• Smartphones and mobile devices requiring multi-touch input
• Tablets and handheld gaming consoles
• Consumer electronics with capacitive touch sensors
• Android and Windows Phone Series 7 compliant devices

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and feature set. The 'T' suffix indicates tape and reel packaging. Ensure compatibility with the host system's interface requirements, specifically I2C or SPI protocols. Confirm that the power supply rails meet the specified digital (1.71–3.6 V) and analog (2.7–3.6 V) operating ranges before integration.

Application Specific Microcontrollers Selection Notes

Select this component for applications requiring support for up to four simultaneous touch points and screens up to 4.5 inches diagonal. The 48-pin QFN package is suitable for space-constrained designs. Choose this part if the application demands high water rejection and stylus replacement capabilities without active stylus support. Verify that the host processor can support the required I2C or SPI data throughput for real-time touch processing.

Application Specific Microcontrollers Part Context

The CY8CTMA340-48LQI-09T belongs to the TrueTouch® Multi-Touch All-Points family from Cypress Semiconductor. This series is designed for high-performance capacitive touch sensing in consumer electronics. The '09' feature set identifier denotes support for four fingers without stylus functionality. It is distinct from other variants like the CY8CTMA340-LQI-11, which includes stylus support.

Application Specific Microcontrollers Replacement Considerations

Direct replacements within the same family include the CY8CTMA340-48LQI-11(T) for four-finger plus stylus support, or the CY8CTMA340-FNI-09T for a CSP package option. Cross-vendor replacements require careful evaluation of interface compatibility, pinout differences, and firmware driver availability.