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Infineon Technologies TMA445-44LQI33ZZAT
- Part No.:
- TMA445-44LQI33ZZAT
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- -
- Datasheet:
-
TMA445-44LQI33ZZAT.pdf
- Description:
- IC MCU TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
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Product details
Overview
TMA445-44LQI33ZZAT from Cypress Semiconductor is a Gen4X-series single-chip touchscreen controller featuring self + mutual capacitance sensing (DUALSENSE™), 36 sense I/Os, 15 V Tx drive, and QFN-44 package. It delivers 0.5 mm typical positional accuracy, glove touch support, and integrated charger noise immunity (Charger Armor™) for reliable operation in noisy mobile environments up to 5-inch displays.
For engineers reviewing the TMA445-44LQI33ZZAT datasheet, TMA445-44LQI33ZZAT pinout, TMA445-44LQI33ZZAT application, or TMA445-44LQI33ZZAT equivalent, key selection criteria include Tx voltage headroom (15 V), deep-sleep power (4.5 µW), waterproofing capability without added films, and dynamic self/mutual mode switching for simultaneous touch and robust signal acquisition.
Technical Context
The TMA445-44LQI33ZZAT implements a 32-bit ARM Cortex-M0 processor running at 150 Hz refresh rate, enabling precise passive stylus and gloved-finger detection. Its DUALSENSE™ architecture allows real-time switching between self-capacitance (for hover and water rejection) and mutual-capacitance (for multi-touch tracking) on the same sensor array.
Charger Armor™ employs adaptive non-linear filtering and frequency hopping synchronized to detected charger noise spectra, while display sync aligns scan timing with display blanking intervals-enabling in-cell integration without shield layers and eliminating display noise coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Tx Drive Voltage | 15 V - Enables high SNR signal injection for reliable touch detection on large or noisy sensor stacks |
| Sense I/O Count | 36 - Supports up to 5-inch diagonal projected-capacitive touch panels with fine resolution |
| Deep Sleep Power | 4.5 µW - Allows battery-powered devices to maintain touch wake-up capability for weeks |
| Positional Accuracy | 0.5 mm typical - Meets precision requirements for stylus input and gesture recognition |
| Waterproofing | Built-in via DUALSENSE™ - Rejects water-induced false touches without overlay films or coatings |
| Refresh Rate | 150 Hz - Captures fast-moving passive stylus strokes and multi-finger swipes without lag |
Pinout & Package
Package: 44-pin QFN (7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | 1.71–1.89 V supply for GPIO and sensor interface logic |
| VDDA | Analog supply rail | 2.7–3.6 V supply for ADC, charge pump, and analog front-end |
| SDA/SCL | I²C interface | Standard two-wire host communication with configurable address (0x24 default) |
| INT | Interrupt output | Active-low open-drain signal indicating new touch data or event status |
| RESET | Hardware reset input | Asynchronous active-low reset that clears internal state and reinitializes firmware |
| TX[0:11] | Transmit electrode drivers | 12 high-voltage (15 V) outputs for segmented Tx line driving |
| RX[0:23] | Receive electrode inputs | 24 differential analog inputs for mutual/self-capacitance sensing |
Key Features
| Feature | Design Value |
|---|---|
| DUALSENSE™ architecture | Single-chip dynamic switching between self- and mutual-capacitance modes enables waterproofing + true multi-touch on one sensor layer |
| Charger Armor™ | Real-time adaptive noise suppression eliminates both periodic and broadband charger interference without external filters |
| Display Sync | Hardware-level synchronization with display vertical blanking interval removes display noise coupling in direct-lamination designs |
| Glove Touch Support | Detects 1.5 mm thick winter gloves using enhanced signal gain and low-noise amplification path |
| ARM Cortex-M0 Core | On-chip 32-bit processor handles real-time touch processing, gesture recognition, and host protocol translation without external MCU overhead |
Applications
| Smartphone Front Panel | Industrial HMI Display |
|---|---|
Use Scenario: Capacitive touch overlay on 4.7-inch AMOLED smartphone display operating near fast-charging adapters and RF transceivers. IC Role / Device Role / Timing Role: Primary touchscreen controller performing real-time mutual-capacitance scanning, Charger Armor™ noise cancellation, and I²C-based host reporting at 150 Hz. Use Value: Eliminates false touches during 18 W USB-PD charging and maintains 0.5 mm stylus tracking accuracy without shield layer. | Use Scenario: Glove-operated 5-inch resistive-to-capacitive upgrade in factory-floor HMIs exposed to ESD and 50/60 Hz line noise. IC Role / Device Role / Timing Role: Self-capacitance mode controller detecting gloved finger presence and rejecting water droplets during washdown cycles. Use Value: Enables reliable operation with 1.5 mm nitrile gloves and survives IP65-rated enclosure sealing without film-based waterproofing. |
| Medical Tablet Interface | Automotive Infotainment Panel |
Use Scenario: Sterile-glove-compatible touch interface on 5-inch medical tablet used in operating rooms with multiple nearby RF-emitting devices. IC Role / Device Role / Timing Role: Dual-mode controller switching to self-capacitance for face/glove detection and mutual for multi-touch gestures during procedure navigation. Use Value: Prevents accidental activation during surgical prep and maintains >99% touch recognition rate under 3 V/m RF field exposure. | Use Scenario: In-dash 5-inch infotainment panel subjected to automotive-grade temperature cycling (-40°C to +85°C) and display noise from TFT backlight drivers. IC Role / Device Role / Timing Role: Display-synced mutual-capacitance scanner aligned to LCD blanking intervals, reducing display noise by >40 dB. Use Value: Enables direct lamination onto display glass without metal shield, cutting BOM cost and improving optical clarity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMA445A-44LQI33ZZAT | Includes face detection feature; otherwise identical electrical and mechanical specs | Required where proximity-based UI suspension (e.g., phone call mute) is needed | Select when face detection is mandatory; otherwise TMA445 offers identical core functionality at lower cost |
| ATMXT224E-CCU | Microchip ATmega-based controller; 2.8 V max Tx drive; no built-in Charger Armor™ | Lacks adaptive charger noise immunity and waterproofing without external firmware/hardware | Choose only if legacy Microchip ecosystem integration outweighs need for Gen4X-level noise immunity |
Compared with TMA445-44LQI33ZZAT, the TMA445A adds face detection without altering power, accuracy, or noise performance, while the ATMXT224E requires external noise mitigation and lacks DUALSENSE™-enabled waterproofing-making it unsuitable for unshielded or wet-environment deployments.
Availability
TMA445-44LQI33ZZAT is available at Aetrix Electronics and suitable for smartphone front panels, industrial HMI displays, medical tablet interfaces, and automotive infotainment panels requiring stable component supply across extended production lifecycles.
Supply support for TMA445-44LQI33ZZAT 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 high-performance mixed-signal ICs for embedded control, connectivity, and human interface applications.
The TrueTouch Gen4X product line targets cost-sensitive, noise-immune capacitive touch solutions for mid-size displays (≤5″) where charger/display noise rejection and glove/water tolerance are critical design requirements.
FAQ
What is the maximum supported sensor size for TMA445-44LQI33ZZAT?
The TMA445-44LQI33ZZAT supports touch panels up to 5 inches diagonal with 36 sense I/Os. Its 15 V Tx drive and optimized analog front-end enable reliable signal acquisition on single-layer SLIM® sensors and traditional ITO patterns at this size, validated per Cypress's Gen4X characterization data.
Does TMA445-44LQI33ZZAT require external firmware updates for Charger Armor™ operation?
No. Charger Armor™ is implemented in dedicated hardware logic and calibrated firmware stored in on-chip ROM. It activates automatically upon detecting charger noise signatures and requires no host intervention, external configuration, or field-upgradable code.
Can TMA445-44LQI33ZZAT operate without a shield layer in direct-lamination designs?
Yes. Using Display Sync mode, the device times its sensing cycles to coincide with display vertical blanking intervals, eliminating display noise coupling. This has been verified on in-cell and direct-laminated AMOLED/LCD panels without metal shielding layers.
What is the minimum I²C clock frequency supported for host communication?
The TMA445-44LQI33ZZAT supports I²C standard mode (100 kHz) and fast mode (400 kHz). Host systems must maintain SCL low time ≥4.7 µs and high time ≥4.0 µs at 400 kHz; timing compliance ensures reliable register access and touch report streaming without NACK or timeout errors.
TMA445-44LQI33ZZAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- -
- Touchscreen:
- -
- Resolution (Bits):
- -
- Interface:
- -
- Voltage Reference:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
TMA445-44LQI33ZZAT FAQ
1.How can I place an order for TMA445-44LQI33ZZAT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMA445-44LQI33ZZAT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMA445-44LQI33ZZAT reliable?
The price and inventory of TMA445-44LQI33ZZAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMA445-44LQI33ZZAT is usually 5 days.
3.What payment methods are accepted for TMA445-44LQI33ZZAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMA445-44LQI33ZZAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMA445-44LQI33ZZAT?
TMA445-44LQI33ZZAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMA445-44LQI33ZZAT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMA445-44LQI33ZZAT?
For technical support, including TMA445-44LQI33ZZAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMA445-44LQI33ZZAT requirements.
6.How does Aetrix verify that TMA445-44LQI33ZZAT is sourced from the original manufacturer or authorized distributors?
All TMA445-44LQI33ZZAT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMA445-44LQI33ZZAT meets industry standards.
7.What is the process for return or replacement of TMA445-44LQI33ZZAT?
All TMA445-44LQI33ZZAT units undergo pre-shipment inspection (PSI). If there is an issue with TMA445-44LQI33ZZAT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMA445-44LQI33ZZAT part is unused and in its original packaging.
Return procedure for TMA445-44LQI33ZZAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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