My Inquiry
My Account
Infineon Technologies CYTMA448-56LQI44AA
- Part No.:
- CYTMA448-56LQI44AA
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 56-UFQFN Exposed Pad
- Datasheet:
-
CYTMA448-56LQI44AA.pdf
- Description:
- IC MCU TRUETOUCH 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,294
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CYTMA448-56LQI44AA from Cypress Semiconductor is a multi-touch capacitive touchscreen controller featuring a 32-bit ARM Cortex™ CPU, 44 sense I/O pins, 21 × 37 (777) mutual capacitance intersections, and industrial temperature range (–40°C to +85°C). It delivers up to 10-finger tracking with wet-finger and thin-glove (≤1 mm) support, integrated ChargerArmor™ for 20 VPP charger noise immunity, and operates with 1.71–5.5 V digital supply in mobile HMI applications.
For engineers reviewing the CYTMA448-56LQI44AA datasheet, CYTMA448-56LQI44AA pinout, CYTMA448-56LQI44AA application, or CYTMA448-56LQI44AA equivalent, key selection criteria include mutual-capacitance sensor configuration (44-pin), DualSense™ water rejection, 20-V ChargerArmor™ compliance, and QFN-56 package compatibility with 6.0-inch diagonal touchscreens.
Technical Context
The CYTMA448-56LQI44AA implements a register-configurable mutual capacitance architecture with dedicated hardware acceleration for real-time touch processing. Its ARM Cortex™ CPU executes firmware-driven calibration, baseline tracking, and noise suppression algorithms-including adaptive TX slew rate control and external display sync-enabling robust operation under dynamic EMI conditions.
DualSense™ technology enables simultaneous wet-finger and dry-finger tracking by independently analyzing self- and mutual-capacitance signals, while ChargerArmor™ employs synchronized TX modulation and digital filtering to suppress broadband noise from USB chargers up to 20 VPP without external shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Touch Points | Up to 10 simultaneous fingers with ≤4 mm small-finger resolution |
| TX Drive Voltage | Effective 28-V peak-to-peak drive for improved SNR in noisy environments |
| Refresh Rate | Up to 230 Hz for low-latency UI response (first-touch ≤13 ms) |
| Sense I/O Count | 44 configurable sense lines supporting 21 TX × 37 RX (777 nodes) |
| Power Consumption | 8.5 mW average active power; 15 μW deep-sleep current |
| Supply Range | Digital/I/O: 1.71–5.5 V; Analog: 2.65–5.5 V |
| Charger Noise Immunity | Immune to AT&T Zero charger noise and up to 20 VPP differential noise |
Pinout & Package
Package: 56-pin QFN, 6.0 mm × 6.0 mm × 0.6 mm body, 0.35 mm lead pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | 1.71–5.5 V input powering GPIOs and I²C/SPI interface logic |
| VDDA | Analog supply | 2.65–5.5 V input for sensor acquisition circuitry and ADC reference |
| SDA / SCL | I²C bidirectional data/clock | Supports standard/fast/fast-plus/high-speed modes (100 kbps–3.4 Mbps) |
| MOSI / MISO / SCLK / SS | SPI slave interface | Full-duplex communication up to 8 Mbps; SS enables multi-device sharing |
| INT | Interrupt output | Active-low signal indicating valid touch report ready for host read |
| RST | Hardware reset input | Asynchronous active-low reset that clears internal state and reinitializes firmware |
| TX[0:20] | Transmit electrode drivers | 21 high-voltage TX outputs supporting flexible routing for Manhattan/Diamond patterns |
| RX[0:36] | Receive electrode inputs | 37 analog front-end channels with programmable gain and filtering |
Key Features
| Feature | Design Value |
|---|---|
| DualSense™ Water Rejection | Enables reliable touch detection during rain, sweat, or condensation via concurrent self/mutual capacitance analysis |
| ChargerArmor™ Noise Suppression | Eliminates false touches caused by USB wall chargers through synchronized TX modulation and digital post-filtering |
| Glove Mode Auto-Switching | Automatically activates enhanced sensitivity for ≤1-mm thin gloves without host intervention or firmware update |
| Flexible Sensor Support | Configurable TX/RX mapping supports Manhattan, Diamond, SLIM®, and Totem-pole sensor layouts on PET/glass substrates |
| Field Upgradability | Bootloader-enabled firmware updates over I²C or SPI without requiring JTAG or external programmer |
Applications
| Smartphone Touch Interface | Tablet HMI System |
|---|---|
Use Scenario: 6.0-inch diagonal LCD-based smartphone with USB-C charging and occasional wet-hand use. IC Role / Device Role / Timing Role: Primary mutual-capacitance touchscreen controller managing 44-sense-line sensor array and delivering 230-Hz reports to Android HAL. Use Value: DualSense™ ensures no loss of touch accuracy during rain exposure; ChargerArmor™ prevents spurious touches during fast-charging. | Use Scenario: 7.9-inch AMOLED tablet with metal-mesh sensor and glove-compatible UI mode. IC Role / Device Role / Timing Role: All-points touch processor handling 10-finger gestures and automatic thin-glove detection at ≤1 mm thickness. Use Value: Configurable TX slew rate and 28-V drive enable stable SNR across variable display stackups and battery voltage sag. |
| Industrial Panel PC | Medical Handheld Terminal |
Use Scenario: Fanless 6.0-inch panel PC in factory environment with ambient EMI and frequent operator glove use. IC Role / Device Role / Timing Role: Robust touch controller operating across –40°C to +85°C with automatic baseline drift compensation. Use Value: 15-μW deep-sleep power extends battery life in portable configurations; large-object rejection prevents false triggers from tool contact. | Use Scenario: Disinfectant-resistant handheld diagnostic device requiring wet-finger and gloved operation in clinical settings. IC Role / Device Role / Timing Role: Certified medical-grade touch interface supporting IEC 60601-1 EMI immunity requirements via hardware-level noise suppression. Use Value: 20-VPP charger noise immunity meets hospital-grade power adapter compatibility; Panel ID reporting enables automated calibration per unit. |
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 (16×14), no built-in ARM CPU, requires external host for gesture processing | Limited to smaller displays (<5.0″); lacks ChargerArmor™ and DualSense™ | Lower BOM cost where advanced noise rejection and wet-finger tracking are not required |
| FT5426GQ | 44-sense I/O, no ARM core, fixed 10-finger reporting, no glove/water rejection firmware | Requires host-side algorithm implementation for environmental adaptation | Preferred for cost-sensitive consumer tablets with stable EMI environments and dry-finger-only use |
Compared with ATMXT224E-MAU and FT5426GQ, CYTMA448-56LQI44AA provides on-chip ARM processing, hardware-accelerated DualSense™ and ChargerArmor™, and full configurability for 6.0″ industrial or medical touchscreens-reducing host CPU load and eliminating need for external noise mitigation components.
Availability
CYTMA448-56LQI44AA is available at Aetrix Electronics and suitable for smartphone touch interfaces, tablet HMIs, industrial panel PCs, and medical handheld terminals requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for CYTMA448-56LQI44AA 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, USB connectivity, and programmable system-on-chip solutions.
CYTMA448 belongs to the TrueTouch® Multi-Touch All-Points Controller product line, engineered specifically for high-noise mobile and industrial touchscreens requiring wet-finger, glove, and charger-immune operation without host CPU overhead.
FAQ
What is the maximum supported touchscreen size for CYTMA448-56LQI44AA?
The CYTMA448-56LQI44AA supports up to 6.0-inch diagonal screens with 5-mm sensor pitch and 16:9 aspect ratio, or up to 5.3-inch with 3.2-mm pitch. This is determined by its 44-sense I/O count and 21×37 node configuration, enabling optimal resolution and SNR for mid-size mobile and portable displays.
Does CYTMA448-56LQI44AA require external memory for firmware storage?
No. The device integrates on-chip flash memory for bootloader and application firmware, supporting field upgrades over I²C or SPI without external EEPROM or Flash. Firmware is stored in protected non-volatile memory and validated on boot using checksums.
How does ChargerArmor™ differ from generic noise filtering in other touch controllers?
ChargerArmor™ uses synchronized TX frequency shifting and real-time digital filtering tuned to USB charger harmonics, achieving 20 VPP immunity without external ferrites or shielding. Unlike software-only filters, it operates at the analog front-end level and is validated against AT&T Zero charger waveforms.
Can CYTMA448-56LQI44AA operate with both I²C and SPI simultaneously?
No. The interface is selectable at boot via strap pins or firmware configuration-only one protocol (I²C or SPI) is active at a time. Both support hot-plug detection and interrupt-driven reporting, but dual-interface concurrent operation is not implemented.
CYTMA448-56LQI44AA 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)
CYTMA448-56LQI44AA FAQ
1.How can I place an order for CYTMA448-56LQI44AA through Aetrix?
Please submit a Request for Quotation (RFQ) for CYTMA448-56LQI44AA 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 CYTMA448-56LQI44AA reliable?
The price and inventory of CYTMA448-56LQI44AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYTMA448-56LQI44AA is usually 5 days.
3.What payment methods are accepted for CYTMA448-56LQI44AA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYTMA448-56LQI44AA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYTMA448-56LQI44AA?
CYTMA448-56LQI44AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYTMA448-56LQI44AA 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 CYTMA448-56LQI44AA?
For technical support, including CYTMA448-56LQI44AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYTMA448-56LQI44AA requirements.
6.How does Aetrix verify that CYTMA448-56LQI44AA is sourced from the original manufacturer or authorized distributors?
All CYTMA448-56LQI44AA 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 CYTMA448-56LQI44AA meets industry standards.
7.What is the process for return or replacement of CYTMA448-56LQI44AA?
All CYTMA448-56LQI44AA units undergo pre-shipment inspection (PSI). If there is an issue with CYTMA448-56LQI44AA, 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 CYTMA448-56LQI44AA part is unused and in its original packaging.
Return procedure for CYTMA448-56LQI44AA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CYTMA448-56LQI44AA Tags
-
TSC2046IPWR
Texas Instruments
-
TSC2007IPWR
Texas Instruments
-
TSC2046EIPWR
Texas Instruments
-
AR1021-I/SS
Microchip Technology
-
AR1020-I/SS
Microchip Technology
-
AR1100-I/MQ
Microchip Technology
-
AR1021T-I/ML
Microchip Technology
-
AR1100T-I/SS
Microchip Technology
-
TSC2003IPWR
Texas Instruments
-
TSC2004IRTJR
Texas Instruments
-
AR1100BRD
Microchip Technology
.jpg)
-
TSC2046IRGVR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
