Infineon Technologies CY8CTMA340-LQI-01T

Overview

CY8CTMA340-LQI-01T from Cypress Semiconductor is a TrueTouch® capacitive touchscreen controller supporting up to 4.5-inch diagonal displays with 252 sensing nodes, 2-finger tracking, I²C/SPI interfaces, 1.71–3.6 V digital supply, and 2.7–3.6 V analog supply - deployed in handheld consumer devices requiring robust stylus-free multi-touch input.

For engineers reviewing the CY8CTMA340-LQI-01T datasheet, CY8CTMA340-LQI-01T pinout, CY8CTMA340-LQI-01T application, or CY8CTMA340-LQI-01T equivalent, key selection criteria include 2-finger ghost-free tracking capability, 36-pin QFN package compatibility, Charger Armor™ noise immunity, wet-finger rejection, and Android/Windows Phone Series 7 compliance.

Technical Context

This controller implements a self-calibrating capacitive sensing architecture with integrated Smart Noise Suppression for LCD, battery charger, common-mode, and RF interference environments. It uses differential mutual capacitance measurement across configurable sense/sensor electrode arrays and supports field firmware updates via its integrated bootloader.

The device operates in three power states: active (>60 Hz refresh with two fingers), low-power (<1.3 mA), and deep sleep (1 µA). Its analog front-end delivers 0.1 mm noise-free resolution and 0.5 mm positional accuracy, with finger separation capability of 3.5 mm under real-world touch conditions.

Key Specifications

Pinout & Package

36-pin 5 × 5 × 0.6 mm QFN package with exposed thermal pad (pin 36). Pinout validated per Cypress Document Number 001-91023 Rev. **, Page 2 ordering table and package drawing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar touchscreen controller applications.

Compared with CY8CTMA340-48LQI-01(T), this 36-pin variant saves PCB area and simplifies routing; versus ATMXT224E-MAU, it offers lower system-level noise immunity in charger-coupled environments but lacks 5-finger capability.

Availability

CY8CTMA340-LQI-01T is available at Aetrix Electronics and suitable for smartphone UI navigation, industrial handheld scanner interfaces, and medical diagnostic tablet interfaces requiring stable component supply and long-term lifecycle support.

Supply support for CY8CTMA340-LQI-01T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs programmable silicon solutions including PSoC, USB, memory, and touch-sensing ICs for embedded systems.

The CY8CTMA340 belongs to Cypress' TrueTouch® Multi-Touch All-Points Controller product line, engineered specifically for cost-sensitive, power-constrained mobile devices needing robust capacitive touch performance in noisy real-world environments.

FAQ

What is the maximum supported touchscreen size for CY8CTMA340-LQI-01T?

The CY8CTMA340-LQI-01T is rated for up to 4.5-inch diagonal displays with 4:3 aspect ratio, supporting 252 sensing nodes. While stretched sensor pitch can extend operation to 7-inch panels, Cypress specifies 4.5-inch as the validated maximum for guaranteed SNR, linearity, and ghost-free tracking performance.

Does CY8CTMA340-LQI-01T support passive stylus input?

No - the -01T variant is configured for 2-finger tracking only and excludes stylus decoding firmware. Stylus support requires the -11(T) or -09(T) variants, which include dedicated algorithm blocks for 1-mm tip detection and palm rejection during stylus use.

Can CY8CTMA340-LQI-01T operate from a single shared supply rail?

Yes - it supports unregulated dual-rail inputs but also accepts a single shared supply between 2.7 V and 3.6 V, internally regulating analog and digital domains. This simplifies power design in space-constrained portable devices where separate LDOs are impractical.

Is deep-sleep current consumption verified at room temperature?

Yes - the 1 µA deep-sleep current is measured per Cypress Document Number 001-91023 Rev. ** under typical conditions (25°C, VDDIO = VDDA = 3.3 V, all peripherals disabled), with no external leakage paths. Actual system-level current depends on PCB layout and external pull-up/pull-down configurations.