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Infineon Technologies CYTMA445-44LQI33ZZA
- Part No.:
- CYTMA445-44LQI33ZZA
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 44-UFQFN Exposed Pad
- Datasheet:
-
CYTMA445-44LQI33ZZA.pdf
- Description:
- IC MCU TRUETOUCH 44QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
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Product details
Overview
CYTMA445-44LQI33ZZA from Cypress Semiconductor is a 32-bit ARM Cortex™-based multi-touch all-points touchscreen controller with 33 sense pins, 4.5-inch diagonal screen support, and DualSense™ water/wet-finger tracking. It delivers up to 300 Hz refresh rate, 13-ms first-touch response, and operates from 1.71–5.5 V digital supply for mobile and portable HMI applications.
For engineers reviewing the CYTMA445-44LQI33ZZA datasheet, CYTMA445-44LQI33ZZA pinout, CYTMA445-44LQI33ZZA application, or CYTMA445-44LQI33ZZA equivalent, key selection criteria include glove/fingernail tracking capability, ChargerArmor™ noise immunity (up to 35 VPP), I²C/SPI interface flexibility, and 44-pin QFN package compatibility with compact 4.5-inch touch displays.
Technical Context
The CYTMA445-44LQI33ZZA implements a register-configurable capacitive sensing architecture with dual-sense electrode scanning for simultaneous wet-finger and water rejection. Its ARM Cortex™ CPU executes real-time baseline compensation, large-object rejection, and automatic mode switching between bare-finger and glove operation.
It supports configurable TX slew rate control and external display synchronization to minimize mutual interference in integrated display modules. The controller achieves SNR enhancement via 28-V effective drive and integrates dedicated hardware blocks for ChargerArmor™ transient suppression and SLIM®/Manhattan sensor pattern decoding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Pins | 33 - Enables 23 × 13 (299) node touch matrix for 4.5-inch 16:9 displays |
| Max Touch Points | 10 fingers - Full multi-touch tracking including fingernail and thin-glove (≤1 mm) |
| Refresh Rate | Up to 300 Hz - Supports low-latency UI navigation and gesture responsiveness |
| First-Touch Latency | ≤13 ms - Measured from finger contact to host-reported coordinate output |
| Digital Supply Range | 1.71–5.5 V - Compatible with single-cell Li-ion and USB-powered systems |
| Analog Supply Range | 2.65–5.5 V - Independent AVDD rail for stable sensor excitation and ADC reference |
| Avg Power (Active) | 6.75 mW - Validated at typical 300-Hz scan rate and 10-finger load |
| Deep-Sleep Power | 4.5 µW - Sustains look-for-touch mode with wake-on-proximity detection |
Pinout & Package
44-pin 5 × 5 × 0.6-mm QFN package with 0.35-mm lead pitch, exposed thermal pad (EP), and standard JEDEC MO-220 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O Supply | 1.71–5.5 V input powering GPIOs, I²C/SPI interface, and internal logic |
| AVDD | Analog Supply | 2.65–5.5 V input for TX drivers, RX front-end, and ADC reference |
| SDA/SCL | I²C Data/Clock | Standard-mode (100 kbps) to high-speed (3.4 Mbps) slave interface |
| MOSI/MISO/SCLK/SS | SPI Interface | Full-duplex SPI slave supporting up to 10 Mbps for high-throughput coordinate streaming |
| INT | Interrupt Output | Open-drain active-low signal indicating new touch data or system event |
| RST | Hardware Reset Input | Asynchronous active-low reset for bootloader entry or fault recovery |
| TX[0:15] | Transmit Electrode Drivers | 16 configurable TX outputs supporting Manhattan, diamond, or SLIM® sensor routing |
| RX[0:16] | Receive Electrode Inputs | 17 differential RX inputs paired with TX for mutual-capacitance scanning |
Key Features
| Feature | Design Value |
|---|---|
| DualSense™ Water Rejection | Real-time discrimination of water droplets vs. finger contact using dual-frequency sensing and adaptive thresholding |
| Glove Mode Switching | Automatic transition between bare-finger (10-point) and glove (2-point thick / 10-point thin) modes without host intervention |
| ChargerArmor™ Noise Immunity | Hardware-level suppression of charger-induced transients up to 35 VPP peak-to-peak on analog and digital rails |
| External Display Sync | Sync input pin accepts VSYNC or DE signal to align touch scans with display frame boundaries, eliminating visual artifacts |
| Fingernail Tracking | Dedicated algorithm detects and reports fingernail taps as valid touch events, enabling precise UI interaction on glossy surfaces |
| Field Upgradability | On-chip bootloader supports firmware updates over I²C or SPI without external programming hardware |
Applications
| Smartphone UI Control | Tablet Navigation |
|---|---|
Use Scenario: 4.5-inch smartphone display with AMOLED panel and USB charging. IC Role / Device Role / Timing Role: Primary touchscreen controller managing mutual-capacitance scanning, wet-finger rejection, and charger-noise-immune coordinate reporting. Use Value: Enables reliable touch operation during fast charging with AT&T Zero charger (35 VPP immunity) and maintains 300-Hz UI responsiveness. | Use Scenario: Portable Android tablet with plastic (PET) sensor substrate and 16:9 aspect ratio. IC Role / Device Role / Timing Role: All-points touch processor executing real-time baseline tracking, large-object rejection, and glove-mode auto-switching. Use Value: Supports simultaneous 10-finger gestures and thin-glove operation (≤1 mm) while rejecting palm grip and stylus-sized objects. |
| Industrial Handheld Terminal | Medical Diagnostic Tablet |
Use Scenario: Ruggedized handheld with on-cell touch-integrated LCD and battery-backed operation. IC Role / Device Role / Timing Role: Low-power touch coordinator delivering 4.5 µW deep-sleep current and fast wake-on-touch for extended battery life. Use Value: Achieves >2-week standby with periodic look-for-touch polling and immediate UI activation on first contact. | Use Scenario: Sterile-environment diagnostic tablet requiring wet-finger and gloved operation. IC Role / Device Role / Timing Role: Dual-sense controller performing concurrent water rejection and 5-mm-thick glove tracking with automatic mode arbitration. Use Value: Maintains clinical-grade touch accuracy under saline exposure and surgical glove use without manual mode selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-touch all-points controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYTMA445-44LQI33AEA | Includes TX slew rate control and improved ESD performance (±8 kV contact); same 33-pin configuration and DualSense™ | Targeted for higher-reliability industrial environments with stringent ESD requirements | Select when system-level ESD testing exceeds IEC 61000-4-2 Level 4 and slew-controlled TX edges reduce EMI |
| CYTMA445-44LQI28AAA | 28 sense pins, 3.9-inch max screen size, no water rejection or glove support | Cost-optimized design for smaller displays where wet/finger/glove features are unnecessary | Select for sub-4-inch consumer devices with basic 5-finger tracking and no environmental robustness requirements |
Compared with CYTMA445-44LQI33AEA, this part omits slew-rate control and enhanced ESD but retains full DualSense™ and glove functionality; versus CYTMA445-44LQI28AAA, it adds water rejection, glove tracking, and supports larger 4.5-inch displays with higher node count.
Availability
CYTMA445-44LQI33ZZA is available at Aetrix Electronics and suitable for smartphone UI control, tablet navigation, industrial handheld terminals, and medical diagnostic tablets requiring stable component supply and long-term lifecycle support.
Supply support for CYTMA445-44LQI33ZZA 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 Corporation, now part of Infineon Technologies, designs high-performance mixed-signal ICs for touch, USB, memory, and programmable systems.
The CYTMA445 family targets capacitive touchscreen controllers for mobile and embedded HMI, emphasizing noise immunity, environmental robustness, and field-upgradable firmware in compact QFN packages.
FAQ
What touchscreen sensor patterns does CYTMA445-44LQI33ZZA support?
It natively supports Manhattan, diamond, and Single Layer Independent Multi-touch (SLIM®) sensor patterns, along with Sensor-on-Lens (SOL) and on-cell touch-integrated display modules. The 33 sense pins enable flexible TX/RX routing on single-layer FPCs for cost-effective mechanical integration.
Does CYTMA445-44LQI33ZZA require external components for basic operation?
Yes - it requires external 0.1-µF decoupling capacitors on VDDIO and AVDD, a pull-up resistor on the INT line, and optional RC filtering on the sync input. No external crystal or oscillator is needed, as the internal PLL generates all required clocks from the I²C/SPI clock or internal RC oscillator.
How does ChargerArmor™ function without host software intervention?
ChargerArmor™ operates entirely in hardware using adaptive sampling window adjustment and transient detection circuitry that identifies charger-induced noise signatures on analog and digital rails, suppressing false touches and coordinate jitter without CPU involvement or firmware updates.
Is Android driver support included with CYTMA445-44LQI33ZZA?
Yes - Cypress provides a production-ready, Linux-based Android touch driver (compatible with Android 4.0+) that supports all CYTMA445 features including DualSense™, glove mode, and ChargerArmor™. The driver is delivered as source code with integration documentation and MTK test utilities.
CYTMA445-44LQI33ZZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-UFQFN Exposed Pad
- Touchscreen:
- 2 Wire Capacitive
- Resolution (Bits):
- 32 b
- Interface:
- I2C, SPI
- Voltage Reference:
- -
- Voltage - Supply:
- 1.71V ~ 5.5V
- Current - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 44-QFN (5x5)
CYTMA445-44LQI33ZZA FAQ
1.How can I place an order for CYTMA445-44LQI33ZZA through Aetrix?
Please submit a Request for Quotation (RFQ) for CYTMA445-44LQI33ZZA 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 CYTMA445-44LQI33ZZA reliable?
The price and inventory of CYTMA445-44LQI33ZZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYTMA445-44LQI33ZZA is usually 5 days.
3.What payment methods are accepted for CYTMA445-44LQI33ZZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYTMA445-44LQI33ZZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYTMA445-44LQI33ZZA?
CYTMA445-44LQI33ZZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYTMA445-44LQI33ZZA 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 CYTMA445-44LQI33ZZA?
For technical support, including CYTMA445-44LQI33ZZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYTMA445-44LQI33ZZA requirements.
6.How does Aetrix verify that CYTMA445-44LQI33ZZA is sourced from the original manufacturer or authorized distributors?
All CYTMA445-44LQI33ZZA 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 CYTMA445-44LQI33ZZA meets industry standards.
7.What is the process for return or replacement of CYTMA445-44LQI33ZZA?
All CYTMA445-44LQI33ZZA units undergo pre-shipment inspection (PSI). If there is an issue with CYTMA445-44LQI33ZZA, 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 CYTMA445-44LQI33ZZA part is unused and in its original packaging.
Return procedure for CYTMA445-44LQI33ZZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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