Infineon Technologies TMA568-56LQI44BB

Overview

TMA568-56LQI44BB from Cypress Semiconductor is a TrueTouch® touchscreen controller IC designed for high-noise environments, featuring 10-V on-chip TX drive, multi-phase TX architecture, and DualSense™ self-plus mutual-capacitance sensing. It supports 5.3" superphones (3.2-mm pitch) and 8.3" tablets (5-mm pitch), delivers >40 Vpp charger noise immunity, and enables 2-mm passive stylus tracking with palm rejection.

For engineers reviewing the TMA568-56LQI44BB datasheet, TMA568-56LQI44BB pinout, TMA568-56LQI44BB application, or TMA568-56LQI44BB equivalent, key selection criteria include SNR performance under display/LCD noise, waterproofing capability per IP-67, glove/hover/2-mm stylus support, and in-cell/on-cell stackup compatibility.

Technical Context

The TMA568 implements a proprietary touchscreen subsystem combining narrow-band analog front-end response with high-frequency sampling and hardware-accelerated DSP filtering to suppress periodic and broadband interference. Its adaptive Charger Armor™ dynamically detects and cancels charger noise up to 40 Vpp across 1–500 kHz.

DualSense™ sensing enables real-time switching between self-capacitance (for hover, glove, and waterproof operation) and mutual-capacitance (for high-resolution multitouch), supported by correlated scanning across all RX lines simultaneously using increased ADC channel count.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MXT224E and QT60160, the TMA568-56LQI44BB uniquely integrates 10-V TX, DualSense sensing, and Charger Armor™ in a single die - enabling robust operation in premium consumer devices where noise, waterproofing, and advanced input modalities are non-negotiable.

Availability

TMA568-56LQI44BB is available at Aetrix Electronics and suitable for premium smartphone interfaces, ruggedized tablet HMIs, waterproof wearables, and in-cell smartwatch designs requiring stable component supply and long-term lifecycle support.

Supply support for TMA568-56LQI44BB 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) is a leader in programmable system-on-chip solutions, specializing in high-performance mixed-signal ICs for human interface, connectivity, and memory applications.

The TMA568 belongs to the TrueTouch® TMA5XX family - engineered specifically for noise-immune, high-SNR capacitive touch control in premium mobile and wearable devices demanding waterproofing, glove/hover/stylus support, and ultra-thin form factors.

FAQ

What is the maximum supported touchscreen size and electrode pitch for TMA568-56LQI44BB?

The TMA568 supports up to 8.3-inch displays at 5-mm electrode pitch and 5.3-inch superphones at 3.2-mm pitch. It drives up to 16 TX and 16 RX lines, enabling configurations such as 16×16 mutual-capacitance matrices or hybrid self/mutual layouts for enhanced noise immunity and feature flexibility.

Does TMA568-56LQI44BB require external components for charger noise immunity?

No external components are required for baseline charger noise immunity. The integrated Charger Armor™ circuitry performs real-time noise detection and cancellation autonomously. However, proper PCB layout - including dedicated analog/digital ground separation, VDDA/VDDIO decoupling, and shielded RX routing - remains essential to achieve full 40 Vpp immunity.

How does DualSense™ enable both waterproofing and high-accuracy multitouch?

DualSense™ uses time-multiplexed self-capacitance scans to detect water presence and hover, then switches to high-speed mutual-capacitance scans for precise touch location. The controller fuses data from both modes using patented algorithms to reject water-induced false touches while preserving true finger position with <1-mm linearity error.

Can TMA568-56LQI44BB operate with standard I²C host processors without custom firmware?

Yes - it supports standard I²C protocol (100/400 kHz) with register-mapped configuration and interrupt-driven reporting. Cypress provides production-ready firmware libraries, configuration tools (TrueTouch Tuning Suite), and reference drivers for ARM Cortex-A/R/M hosts, enabling bring-up in under one engineering week without low-level driver development.