Infineon Technologies TMA545-48LQI36ZZAT

Overview

TMA545-48LQI36ZZAT from Cypress Semiconductor is a TrueTouch® touchscreen controller IC designed for high-noise environments, featuring 48-channel mutual-capacitance sensing, integrated Charger Armor™ for up to 40 Vpp charger noise suppression, and DualSense™ self-plus-mutual capacitance architecture enabling glove, hover (up to 10 mm), and 2-mm passive stylus support. It targets premium smartphones and tablets with in-cell or on-cell display integration.

For engineers reviewing the TMA545-48LQI36ZZAT datasheet, TMA545-48LQI36ZZAT pinout, TMA545-48LQI36ZZAT application, or TMA545-48LQI36ZZAT equivalent, key selection criteria include SNR performance under display/charger interference, waterproofing capability per IP-67, simultaneous self/mutual capacitance switching, and support for thin-film sensor stackups without shield layers or air gaps.

Technical Context

The TMA545-48LQI36ZZAT implements a proprietary analog front end combining narrow-band response with high-frequency sampling and hardware DSP filtering to suppress periodic and broadband noise. Its multi-phase TX drive delivers on-chip 10-V Tx output and supports correlated scanning across all 48 Rx channels simultaneously.

DualSense™ operation enables dynamic switching between self-capacitance (for robust water tolerance and hover detection) and mutual-capacitance (for precise multi-touch tracking). External display synchronization eliminates need for mechanical shielding, supporting direct-lamination, on-cell, and in-cell LCD stackups.

Key Specifications

Pinout & Package

Package: 36-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GT9110 and MXT224E, the TMA545-48LQI36ZZAT uniquely integrates dual-mode sensing, adaptive charger noise cancellation, and on-chip 10-V TX - enabling certified IP-67 operation, glove/hover/stylus support, and display-integrated stackups without mechanical shielding.

Availability

TMA545-48LQI36ZZAT is available at Aetrix Electronics and suitable for premium smartphone display interfaces, waterproof tablet UIs, wearable smartwatch interfaces, and industrial human-machine interfaces requiring stable component supply and long-term lifecycle assurance.

Supply support for TMA545-48LQI36ZZAT 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 automotive, industrial, and consumer applications.

The TrueTouch® product line was developed specifically to solve noise-immunity challenges in capacitive touch systems - delivering certified IP-67 waterproofing, glove/hover/stylus support, and display-integrated design flexibility for next-generation mobile and wearable devices.

FAQ

What is the maximum supported sensor pitch for TMA545-48LQI36ZZAT in mutual-capacitance mode?

The TMA545-48LQI36ZZAT supports up to 5-mm pitch for large-screen applications such as 8.3" tablets, and 3.2-mm pitch for superphones like the 6.44" ZTE Nubia X6. This is enabled by its high-SNR analog front end and 48-channel correlated scanning architecture, which maintains signal integrity across wider electrode spacing without interpolation artifacts.

Does TMA545-48LQI36ZZAT require external components for charger noise suppression?

No. Charger Armor™ is fully integrated into the TMA545-48LQI36ZZAT's analog front end and operates autonomously - detecting charger noise signatures and activating proprietary filtering without external ICs, passive filters, or firmware configuration. Only standard decoupling capacitors (0.1 µF + 10 µF) are required per power rail.

Can TMA545-48LQI36ZZAT drive in-cell touch sensors without additional timing controllers?

Yes. The device includes hardware-level DISP_SYNC input that accepts standard LCD VSYNC or DE signals, enabling direct synchronization of touch scan timing with display frame updates. This eliminates the need for external timing controllers or software-based frame alignment, simplifying in-cell integration and reducing latency.

Is palm rejection implemented in hardware or firmware on TMA545-48LQI36ZZAT?

Palm rejection is implemented in hardware via the TMA545-48LQI36ZZAT's dedicated algorithm engine and correlated sampling architecture. It identifies palm contact patterns in real time using spatial distribution, signal amplitude, and temporal persistence - requiring no host CPU intervention or firmware updates to maintain effectiveness across varying screen sizes and sensor layouts.