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Infineon Technologies CYTT21403-56LQI44
- Part No.:
- CYTT21403-56LQI44
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 56-UFQFN Exposed Pad
- Datasheet:
-
CYTT21403-56LQI44.pdf
- Description:
- IC MCU 32BIT 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
CYTT21403-56LQI44 from Cypress Semiconductor is a multi-touch capacitive touchscreen controller featuring a 32-bit ARM® Cortex™ CPU, 44 sense I/O pins, support for up to 10 simultaneous touches, and integrated DualSense™ for water rejection and wet-finger tracking. It delivers 300 Hz refresh rate, 500 kHz TX frequency, and 35-VPP charger noise immunity via ChargerArmor™, targeting mid-size touchscreens in industrial HMIs and consumer portable devices.
For engineers reviewing the CYTT21403-56LQI44 datasheet, CYTT21403-56LQI44 pinout, CYTT21403-56LQI44 application, or CYTT21403-56LQI44 equivalent, key selection criteria include its 44-sense-pin QFN package, glove/touch stylus mode switching, analog supply range (2.65–4.7 V), and I²C/SPI interface compatibility with Android™-based embedded UI stacks.
Technical Context
This controller implements an all-points scanning architecture with configurable TX/RX sequencing, enabling Manhattan, diamond, SLIM®, and Totem-pole sensor patterns on PET/glass substrates and on-cell AMOLED/LCD displays. Its dual-sensing engine processes mutual-capacitance data while simultaneously rejecting large-object interference and baseline drift from environmental humidity or temperature shifts.
The device integrates dedicated hardware accelerators for palm rejection, fingernail detection, and automatic mode switching between bare finger, thin/thick glove (≤1 mm / ≤5 mm), and 2.5-mm passive stylus input - all without host CPU intervention. Timing synchronization with external display drivers ensures stable touch reporting during active panel updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense I/O Count | 44 pins - supports up to 527 node intersections (e.g., 31 × 17) on medium-format touch sensors |
| Max Simultaneous Touches | 10 fingers - enables full multi-gesture UI navigation including pinch-to-zoom and rotate |
| Refresh Rate | Up to 300 Hz - ensures sub-4 ms latency for responsive stylus and fast-swipe interactions |
| Charger Noise Immunity | 35-VPP peak-to-peak - maintains reliable operation during USB-C fast-charging with noisy adapters |
| Digital Supply Range | 1.71–1.95 V or 2.0–5.5 V - allows direct interfacing with 1.8-V or 3.3-V host SoCs |
| Analog Supply Range | 2.65–4.7 V - powers high-voltage TX drivers for improved SNR on resistive-lossy sensor layers |
| Communication Interfaces | I²C (100/400 kbps) and SPI (up to 8 Mbps) - supports low-latency host polling or interrupt-driven reporting |
Pinout & Package
56-pin 6 × 6 × 0.6-mm QFN package with 0.35-mm lead pitch; exposed thermal pad for enhanced power dissipation in continuous scanning mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog Power Supply | 2.65–4.7 V input powering TX drivers and ADC front-end; requires local 1-µF ceramic decoupling |
| VDDD | Digital Core Power | 1.71–1.95 V or 2.0–5.5 V supply for ARM Cortex™ core and digital logic |
| SCL / SDA | I²C Interface | Open-drain bidirectional lines supporting standard/fast-mode timing; pull-up required externally |
| MOSI / MISO / SCLK / SSN | SPI Interface | Full-duplex 4-wire SPI slave; SSN active-low enables multi-device sharing on same bus |
| INT | Interrupt Output | Active-low open-drain signal asserting on new touch data ready or gesture event |
| RST | Hardware Reset Input | Asynchronous active-low reset; must be held low ≥10 µs for full controller initialization |
| TX[0:15] | Transmit Electrode Drivers | 16 configurable high-voltage TX outputs (up to 14 V); each drives one row electrode |
| RX[0:27] | Receive Electrode Inputs | 28 differential RX inputs (of 44 total I/O) sampling column capacitance changes |
Key Features
| Feature | Design Value |
|---|---|
| DualSense™ Engine | Simultaneous self- and mutual-capacitance measurement enabling robust wet-finger tracking and water rejection without firmware overhead |
| ChargerArmor™ | Hardware-based noise cancellation synchronized to AC adapter ripple frequency, eliminating need for external filtering components |
| Glove Mode Switching | Automatic detection and adaptation to thin (≤1 mm) or thick (≤5 mm) gloves using dynamic sensitivity scaling and baseline recalibration |
| Passive Stylus Support | Native 2.5-mm tip resolution with automatic transition from finger to stylus mode based on contact area and signal decay profile |
| Field Upgradability | On-chip bootloader enables secure firmware updates over I²C/SPI without requiring JTAG or external programmer |
Applications
| Industrial HMI Panels | Consumer Portable Devices |
|---|---|
Use Scenario: Touchscreen interface on factory-floor HMIs operating under variable ambient lighting, humidity, and glove use. IC Role / Device Role / Timing Role: All-points capacitive controller managing 44-sensor-node overlay with real-time baseline compensation and charger noise rejection. Use Value: Enables reliable 10-finger gesture control and stylus annotation even during 24/7 operation with USB-powered industrial chargers. | Use Scenario: Mid-tier tablet or e-reader with 5.5-inch display, requiring low-power touch during battery operation and glove compatibility in cold environments. IC Role / Device Role / Timing Role: Primary touch controller handling mutual-capacitance scanning, palm rejection, and automatic mode switching between bare finger and 3-mm glove input. Use Value: Delivers 9-mW average power consumption and 10.7-μW deep-sleep current, extending battery life while maintaining responsive UI across usage conditions. |
| White Goods Control Panels | Medical Handheld Terminals |
Use Scenario: Appliance control panel (oven, washer) exposed to steam, condensation, and occasional liquid spills. IC Role / Device Role / Timing Role: Capacitive controller executing DualSense™-based water rejection and wet-finger tracking at 300 Hz scan rate. Use Value: Maintains functional touch accuracy during surface moisture events without false triggers or loss of responsiveness. | Use Scenario: Disinfectant-resistant handheld diagnostic terminal used with nitrile gloves in clinical settings. IC Role / Device Role / Timing Role: Touch controller adapting sensitivity and baseline in real time to glove thickness variations and repeated alcohol wipe exposure. Use Value: Supports consistent two-finger pinch zoom and swipe gestures through ≤5-mm medical gloves without manual calibration. |
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 capacity; 32-sense-pin QFN; no built-in ChargerArmor™; requires external noise filtering | Limited to smaller screens (<4.3"); lower SNR in high-noise charging environments | Select when cost-sensitive designs prioritize footprint over charger immunity and glove support |
| FT5426GQR | 48-sense-pin QFN; supports 10 touches; lacks DualSense™ and passive stylus auto-switching | No wet-finger or water rejection; stylus requires separate mode command; higher host CPU load for baseline management | Choose for Android-only deployments where firmware-level noise mitigation suffices and stylus use is infrequent |
Compared with ATMXT224E-MAU and FT5426GQR, CYTT21403-56LQI44 uniquely integrates hardware-accelerated ChargerArmor™, DualSense™, and automatic stylus/glove mode switching - reducing host processing load and enabling robust operation in humid, high-noise, or gloved-use scenarios without external components or calibration.
Availability
CYTT21403-56LQI44 is available at Aetrix Electronics and suitable for industrial HMI panels, white goods control interfaces, medical handheld terminals, and consumer portable devices requiring stable component supply and long-term lifecycle support.
Supply support for CYTT21403-56LQI44 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 programmable system-on-chip solutions for embedded control, connectivity, and sensing applications.
CYTT21X series belongs to Cypress' TrueTouch® family, engineered specifically for high-reliability, noise-immune capacitive touch control in industrial, appliance, and portable electronics - with emphasis on wet-environment resilience and multi-modal input support.
FAQ
What is the maximum supported touchscreen size for CYTT21403-56LQI44?
The CYTT21403-56LQI44 supports up to 7.0-inch diagonal screens with 5.0-mm electrode pitch and 16:9 aspect ratio, or up to 5.5-inch with 4.0-mm pitch. Actual size depends on sensor layout (e.g., 31 × 17 node grid), mechanical stackup, and signal integrity - not just I/O count.
Does CYTT21403-56LQI44 require external components for charger noise suppression?
No. ChargerArmor™ is implemented in hardware and requires no external filters or ferrites. It synchronizes internal sampling to charger ripple frequency and applies adaptive digital cancellation - validated for immunity up to 35-VPP noise on VDDA and I/O lines.
Can CYTT21403-56LQI44 operate with both 1.8-V and 3.3-V host interfaces?
Yes. Its digital I/O supports 1.71–1.95 V or 2.0–5.5 V operation, allowing direct connection to 1.8-V SoCs (e.g., Qualcomm Snapdragon S4) or 3.3-V microcontrollers without level shifters. VDDD must be set accordingly, and I²C pull-ups referenced to the same rail.
Is Android™ driver support included out-of-the-box?
Yes. Cypress provides certified Android™ HAL and kernel drivers (Linux 3.4+ and Android 4.2+) with full gesture engine integration, including multi-finger tracking, palm rejection, and stylus/glove mode reporting - deployable without modification on compatible BSPs.
CYTT21403-56LQI44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-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:
- 56-QFN (6x6)
CYTT21403-56LQI44 FAQ
1.How can I place an order for CYTT21403-56LQI44 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYTT21403-56LQI44 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 CYTT21403-56LQI44 reliable?
The price and inventory of CYTT21403-56LQI44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYTT21403-56LQI44 is usually 5 days.
3.What payment methods are accepted for CYTT21403-56LQI44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYTT21403-56LQI44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYTT21403-56LQI44?
CYTT21403-56LQI44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYTT21403-56LQI44 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 CYTT21403-56LQI44?
For technical support, including CYTT21403-56LQI44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYTT21403-56LQI44 requirements.
6.How does Aetrix verify that CYTT21403-56LQI44 is sourced from the original manufacturer or authorized distributors?
All CYTT21403-56LQI44 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 CYTT21403-56LQI44 meets industry standards.
7.What is the process for return or replacement of CYTT21403-56LQI44?
All CYTT21403-56LQI44 units undergo pre-shipment inspection (PSI). If there is an issue with CYTT21403-56LQI44, 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 CYTT21403-56LQI44 part is unused and in its original packaging.
Return procedure for CYTT21403-56LQI44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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