CY8CTMA340-FNI-09T

Application Specific Microcontrollers Overview

The CY8CTMA340-FNI-09T is a TrueTouch Multi-Touch All-Points Capacitive Touchscreen Controller manufactured by Infineon Technologies (formerly Cypress Semiconductor). It supports up to four independent fingers and tracks up to 252 intersections via 32 sense pins. The device operates with a digital supply voltage range of 1.71 V to 3.6 V and an analog supply voltage range of 2.7 V to 3.6 V, supporting single shared supply configurations. It features I2C slave communication up to 400 kHz and SPI slave communication with sustained data throughput up to 2 Mbps. The controller includes integrated test firmware and a bootloader for field upgrades.

Application Specific Microcontrollers Feature Summary

• Tracks up to four fingers independently with ghost-free tracking
• Supports passive stylus replacement with 1-mm tip accuracy
• Features Charger Armor technology for battery charger noise immunity
• Provides best-in-class water rejection and wet-finger tracking

Application Specific Microcontrollers Applications

• Capacitive touchscreen displays up to 4.5 inches diagonal
• Android and Windows Phone Series 7 compliant devices
• Automotive infotainment systems requiring touch input
• Consumer electronics utilizing plastic film or glass sensors

Application Specific Microcontrollers Procurement Notes

Verify the component status as the source indicates potential discontinuation or limited availability for certain variants within the CY8CTMA340 family. Confirm the specific ordering suffix 'FNI' corresponds to the 49-ball CSP package and tape-and-reel delivery format. Ensure compatibility with host system voltage requirements before procurement.

Application Specific Microcontrollers Selection Notes

Select this model for applications requiring support for up to four simultaneous touch points and stylus input. The FNI suffix denotes a 49-ball CSP package suitable for space-constrained designs. Verify that the sensor pitch and screen size align with the maximum node count of 252. Consider the power consumption specifications if low-power state operation is critical.

Application Specific Microcontrollers Part Context

This component belongs to the CY8CTMA340 series of TrueTouch controllers. It is part of the broader Infineon portfolio of touch sensing solutions, which includes various packages such as QFN and other CSP options. The series is designed to replace resistive touch technologies while offering enhanced performance in noisy environments.

Application Specific Microcontrollers Replacement Considerations

Direct replacements within the same series include CY8CTMA340-LQI-09T (36-pin QFN) and CY8CTMA340-48LQI-09T (48-pin QFN), which offer identical feature sets but different physical footprints. Cross-package substitution requires PCB layout redesign.