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Infineon Technologies CYTMA545-44LQI33AA
- Part No.:
- CYTMA545-44LQI33AA
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 44-UFQFN Exposed Pad
- Datasheet:
-
CYTMA545-44LQI33AA.pdf
- Description:
- IC MCU TRUETOUCH 44QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,216
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Product details
Overview
CYTMA545-44LQI33AA from Cypress Semiconductor is a multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex™ CPU, configurable register architecture, and DualSense™ water/wet-finger rejection. It supports up to 10 fingers on 4.5-inch displays (4.8-mm sensor pitch), delivers 300-Hz refresh rate, and achieves ≤13-ms first-touch response with 5.6-mW average power consumption.
For engineers reviewing the CYTMA545-44LQI33AA datasheet, CYTMA545-44LQI33AA pinout, CYTMA545-44LQI33AA application, or CYTMA545-44LQI33AA equivalent, key selection factors include its 44-pin QFN package, 33 sense pins, ChargerArmor™ noise immunity (up to 60 VPP), glove/touch stylus/hover support, and Android/Windows Phone 8 driver compatibility.
Technical Context
The CYTMA545-44LQI33AA implements a self-capacitive + mutual-capacitive hybrid sensing architecture with dedicated hardware acceleration for real-time finger tracking, baseline drift compensation, and large-object rejection. Its TX frequency reaches 500 kHz, and it supports flexible TX/RX routing for single-layer FPC designs.
It integrates ChargerArmor™ for robust operation under battery charger interference and uses DualSense™ to independently process self- and mutual-capacitance signals-enabling simultaneous wet-finger tracking and water rejection without firmware intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Digital Supply | 1.71–5.5 V: Enables direct interface with diverse host I/O rails including 1.8-V, 3.3-V, and 5-V systems. |
| Analog Supply | 2.65–5.5 V: Supports high-SNR analog front-end operation across varied display stackups and sensor substrates. |
| Max Sense Pins | 33: Configures up to 23 × 13 (299) mutual-capacitance intersections for 4.5-inch 16:9 touchscreens. |
| Refresh Rate | Up to 300 Hz: Delivers sub-4-ms frame latency for gaming and gesture-responsive UIs. |
| First-Touch Latency | ≤13 ms: Meets stringent responsiveness requirements for mobile OS touch stacks. |
| Avg Power | 5.6 mW: Enables always-on touch functionality in battery-powered handheld devices. |
| Deep-Sleep Power | 4.5 µW: Sustains low-power look-for-touch mode during system suspend states. |
Pinout & Package
44-pin 5 × 5 × 0.6-mm QFN package with 0.35-mm lead pitch, thermally enhanced exposed pad for EMI control and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | Accepts 1.71–5.5 V; powers GPIOs, I²C/SPI interface, and digital logic block. |
| VDDA | Analog supply | 2.65–5.5 V input for ADC, charge pump, and sensor excitation circuitry. |
| SDA/SCL | I²C data/clock | Supports standard/fast/fast-plus/high-speed modes (100 kbps–3.4 Mbps) for host communication. |
| MOSI/MISO/SCLK/SS | SPI interface | Full-duplex SPI slave up to 10 Mbps; enables high-bandwidth firmware updates and debug streaming. |
| INT | Interrupt output | Active-low open-drain signal indicating new touch report ready for host read. |
| RST | Hardware reset | Asynchronous active-low reset that clears internal state and reinitializes sensor calibration. |
| TX[0:15] | Transmit electrode drivers | 16 programmable TX outputs supporting slew-rate control for EMI optimization. |
| RX[0:16] | Receive electrode inputs | 17 differential RX channels with correlated double sampling for noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| DualSense™ water rejection | Simultaneous self- and mutual-capacitance measurement enables reliable wet-finger tracking without false triggers. |
| ChargerArmor™ noise immunity | Hardware-level suppression of 60-VPP charger ripple, validated against AT&T Zero and Duracell chargers. |
| Glove mode auto-switching | Automatic detection and adaptation for ≤1-mm thin gloves (10 fingers) or ≤5-mm thick gloves (2 fingers). |
| Passive stylus + palm rejection | Distinguishes stylus tip geometry from palm contact area using spatial capacitance gradient analysis. |
| Hover finger sensing | Detects finger presence up to 15 mm above surface via elevated baseline tracking and dynamic threshold adjustment. |
Applications
| Smartphone Touch Interface | Tablet Human-Machine Interface |
|---|---|
Use Scenario: 4.5-inch smartphone display with fast UI navigation, multi-gesture support, and charging-in-use operation. IC Role / Device Role / Timing Role: Primary touchscreen controller managing mutual-capacitance scanning, real-time finger tracking, and host interrupt signaling. Use Value: 300-Hz refresh and ≤13-ms first-touch latency enable responsive swipe/gesture execution; ChargerArmor ensures no touch dropout during USB charging. | Use Scenario: 7-inch tablet with glove operation in industrial environments and stylus annotation capability. IC Role / Device Role / Timing Role: All-points capacitive controller handling dual-mode (glove/stylus) input, hover detection, and palm rejection. Use Value: Auto-switching between thin/thick glove modes eliminates manual UI configuration; passive stylus support enables precise drawing without active electronics. |
| Automotive Infotainment Panel | Medical Handheld Diagnostic Device |
Use Scenario: In-vehicle center console with wet-finger tolerance (rain/sweat) and face/grip suppression during driving. IC Role / Device Role / Timing Role: Touchscreen controller executing DualSense™ water rejection, face detection, and grip suppression algorithms in real time. Use Value: Wet-finger tracking maintains usability in humid conditions; grip suppression prevents accidental activation when holding device edges. | Use Scenario: Portable ultrasound or patient monitor with sterile-glove operation and high-reliability touch response. IC Role / Device Role / Timing Role: Low-power, high-SNR touchscreen controller supporting 4.5-inch display and deep-sleep wake-on-touch. Use Value: 4.5-µW deep-sleep power extends battery life; automatic baseline tracking compensates for temperature/humidity drift in clinical settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-touch capacitive controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMXT224E-MAU | 224-node max resolution; 32-bit ARM core; no built-in ChargerArmor or DualSense; requires external noise filtering. | Limited to dry-environment tablets; lacks wet-finger/glove support and charger noise immunity. | Select when cost sensitivity outweighs environmental robustness requirements. |
| FT5426GQ | Single-core 32-bit ARM; 10-finger support; no hardware-accelerated water rejection or hover sensing. | Suitable for basic smartphones but not certified for automotive or medical glove use cases. | Choose for entry-level consumer devices where advanced sensing features are non-critical. |
Compared with ATMXT224E-MAU and FT5426GQ, the CYTMA545-44LQI33AA uniquely integrates ChargerArmor™ and DualSense™ at silicon level-delivering verified 60-VPP charger immunity and concurrent wet-finger/glove/hover operation without host CPU overhead.
Availability
CYTMA545-44LQI33AA is available at Aetrix Electronics and suitable for smartphone touch interfaces, industrial tablet HMIs, automotive infotainment panels, and medical handheld diagnostic devices requiring stable component supply and long-term lifecycle assurance.
Supply support for CYTMA545-44LQI33AA 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 systems, with expertise in capacitive sensing, PSoC architecture, and USB connectivity.
The CYTMA545 belongs to the TrueTouch® family-engineered specifically for robust, all-points capacitive touch control in mobile, automotive, and industrial human-interface applications demanding environmental resilience and low-power operation.
FAQ
What touchscreen sensor patterns does CYTMA545-44LQI33AA support?
The CYTMA545-44LQI33AA supports Manhattan, diamond, and SLIM® sensor patterns, as well as sensor-on-lens (SOL) and on-cell touch-integrated display modules. It accommodates both PET plastic and glass substrates, and is compatible with LCD and AMOLED displays per the official datasheet.
Does CYTMA545-44LQI33AA require external components for charger noise immunity?
No. ChargerArmor™ is implemented in hardware within the CYTMA545-44LQI33AA die and requires no external filters, ferrites, or shielding components. It provides verified immunity to 60-VPP charger noise, including AT&T Zero and Duracell chargers, as confirmed in the device characterization report.
Can CYTMA545-44LQI33AA operate with a 1.8-V host interface?
Yes. Its VDDIO supply range is 1.71–5.5 V, fully supporting 1.8-V I/O operation. The I²C interface operates at standard, fast, and fast-plus modes (100 kbps–1 Mbps) at 1.8-V levels, and SPI is functional at 10 Mbps with appropriate level-shifting if host voltage differs from VDDIO.
Is field firmware upgrade supported on CYTMA545-44LQI33AA?
Yes. The device includes an integrated bootloader enabling secure, over-the-air (OTA) or host-triggered field upgrades without requiring JTAG or external programming hardware. Firmware images are authenticated and loaded via I²C or SPI, preserving calibration data during update.
CYTMA545-44LQI33AA 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)
CYTMA545-44LQI33AA FAQ
1.How can I place an order for CYTMA545-44LQI33AA through Aetrix?
Please submit a Request for Quotation (RFQ) for CYTMA545-44LQI33AA 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 CYTMA545-44LQI33AA reliable?
The price and inventory of CYTMA545-44LQI33AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYTMA545-44LQI33AA is usually 5 days.
3.What payment methods are accepted for CYTMA545-44LQI33AA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYTMA545-44LQI33AA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYTMA545-44LQI33AA?
CYTMA545-44LQI33AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYTMA545-44LQI33AA 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 CYTMA545-44LQI33AA?
For technical support, including CYTMA545-44LQI33AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYTMA545-44LQI33AA requirements.
6.How does Aetrix verify that CYTMA545-44LQI33AA is sourced from the original manufacturer or authorized distributors?
All CYTMA545-44LQI33AA 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 CYTMA545-44LQI33AA meets industry standards.
7.What is the process for return or replacement of CYTMA545-44LQI33AA?
All CYTMA545-44LQI33AA units undergo pre-shipment inspection (PSI). If there is an issue with CYTMA545-44LQI33AA, 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 CYTMA545-44LQI33AA part is unused and in its original packaging.
Return procedure for CYTMA545-44LQI33AA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYTMA545-44LQI33AA Tags
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