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Infineon Technologies CYAT837AZS77-42002
- Part No.:
- CYAT837AZS77-42002
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT837AZS77-42002.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
CYAT837AZS77-42002 from Infineon is an AEC-Q100 qualified automotive-grade capacitive touchscreen controller with 77 sense I/Os, Arm® Cortex® CPU core, 128-pin TQFP package (14 × 20 × 1.4 mm), and support for 10-finger multitouch, wet-finger tracking, and thin-glove operation (≤1 mm) in -40°C to 105°C ambient. It delivers up to 120 Hz refresh rate, 150 kHz TX frequency, and integrated DSP for noise-suppressed scanning in large-format automotive displays.
For engineers reviewing the CYAT837AZS77-42002 datasheet, CYAT837AZS77-42002 pinout, CYAT837AZS77-42002 application, or CYAT837AZS77-42002 equivalent, key selection criteria include glove/water rejection capability, 128-pin TQFP mechanical compatibility, AEC-Q100 Grade 2 temperature rating, I²C host interface support at 1 Mbps, and multi-chip scalability for >35-inch touchscreens.
Technical Context
This device operates as a master touchscreen controller in multichip PSoC Automotive Generation 7XL systems, implementing DualSense sensing architecture with dedicated TX/RX channel management across 77 sense pins. Its AutoArmor EMI mitigation and DisplayArmor interference suppression are hardware-accelerated via on-die logic and configurable firmware.
The integrated 192-channel ADC array enables single-pass long-side scanning, while the 32-bit Arm Cortex-M core executes real-time baseline tracking, large-object rejection, and field-upgradable firmware via bootloader. System-level timing is synchronized using internal PLLs supporting 150 kHz TX modulation and 120 Hz frame reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense I/O Count | 77 dedicated capacitive sense inputs for electrode routing in large-area touch sensors |
| Operating Temp Range | -40°C to +105°C (Automotive-S grade), enabling under-hood or center-stack deployment |
| Refresh Rate | Up to 120 Hz - supports low-latency gesture response in infotainment UIs |
| TX Frequency | Up to 150 kHz - optimizes SNR against display noise in AMOLED/LCD stacks |
| Host Interface | I²C slave at 1 Mbps - meets high-throughput touch report delivery for 10-finger tracking |
| Power Supply | 1.71–1.95 V core / 3.0–5.5 V I/O & analog - supports mixed-rail automotive power domains |
| Package | 128-pin TQFP (14 × 20 × 1.4 mm, 0.5 mm pitch) - compatible with standard SMT reflow profiles |
Pinout & Package
128-pin TQFP (14 × 20 × 1.4 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | 3.0–5.5 V rail powering GPIO, I²C, and interrupt outputs |
| VDDA | Analog supply | 3.0–5.5 V clean rail for ADC reference and sensor front-end biasing |
| VDDCORE | Core logic supply | 1.71–1.95 V regulated input for Arm Cortex-M CPU and digital subsystem |
| SCL/SDA | I²C host interface | Open-drain bidirectional lines supporting 1 Mbps data transfer for touch reports |
| INT | Interrupt output | Active-low signal asserting new touch data availability to host processor |
| RESET_N | Asynchronous reset | Low-active pin initiating full system initialization and firmware reload |
| SENSE[0:76] | Capacitive sense inputs | 77 dedicated pins for connection to TX/RX electrodes in segmented touch sensor arrays |
Key Features
| Feature | Design Value |
|---|---|
| DualSense sensing architecture | Simultaneous self- and mutual-capacitance measurement per electrode pair for robust wet/finger differentiation |
| AutoArmor EMI mitigation | Hardware-accelerated spread-spectrum TX modulation and adaptive noise filtering reducing radiated emissions by >10 dB |
| Water rejection & wet-finger tracking | Real-time baseline recalibration and differential signal processing enabling operation with >2 mm water film |
| Glove mode auto-switching | Dynamic sensitivity scaling detects glove presence and adjusts gain without host intervention |
| Manufacturing test kit (MTK) support | On-chip self-test routines for production-line electrode continuity, capacitance range, and signal integrity validation |
Applications
| Infotainment Center Touchscreen | Digital Instrument Cluster |
|---|---|
Use Scenario: 12–17-inch LCD/AMOLED display in vehicle center stack with ambient light, vibration, and condensation exposure. IC Role / Device Role / Timing Role: Master controller managing up to 77 sense channels, executing real-time touch detection, and reporting coordinates via I²C at ≤120 Hz. Use Value: Enables reliable 10-finger gestures and wet-finger operation without false triggers during rain or condensation events. | Use Scenario: 10–12-inch TFT cluster with safety-critical HUD integration and driver attention monitoring. IC Role / Device Role / Timing Role: Primary touch coordinator synchronizing with CAN FD bus for driver input logging and haptic feedback coordination. Use Value: Supports glove operation (≤1 mm) and automatic baseline drift compensation across -40°C to 105°C thermal cycling. |
| Head-Up Display (HUD) Touch Overlay | Passenger Seat Control Panel |
Use Scenario: Transparent capacitive overlay on curved combiner glass with optical bonding and EMI from projection engine. IC Role / Device Role / Timing Role: Low-noise sensing node using DisplayArmor to suppress 60–120 Hz display switching artifacts. Use Value: Maintains <5 ms latency and rejects interference from adjacent projector drivers and backlight inverters. | Use Scenario: Multi-zone climate and seat control panel with metal mesh sensor and thick glove requirement (≤5 mm). IC Role / Device Role / Timing Role: Slave controller in multichip configuration, handling local zone sensing and forwarding aggregated reports to master IC. Use Value: Delivers consistent finger localization despite varying glove thickness and surface contamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYAT837AZA77-42002 | Same silicon, -40°C to +85°C temperature grade (Automotive-A) | Restricted to non-under-hood locations with lower thermal stress | Select when operating environment remains below 85°C ambient and cost optimization is prioritized |
| CYAT847AZS77-42002 | Slave-configured variant with identical pinout and sensing capability but no master arbitration logic | Requires companion master IC (e.g., CYAT837X) in multichip topology | Select only for distributed sensor architectures where one master coordinates multiple slave controllers |
Compared with CYAT837AZA77-42002, this part adds extended temperature resilience for under-dash or center-console mounting; versus CYAT847AZS77-42002, it provides autonomous master functionality eliminating dependency on external coordination logic.
Availability
CYAT837AZS77-42002 is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and HUD touch overlays requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for CYAT837AZS77-42002 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive microcontrollers, and sensing solutions, with global R&D and manufacturing infrastructure.
This device belongs to the PSoC™ Automotive Multitouch Generation 7XL product line, engineered specifically for high-reliability, noise-immune capacitive touch interfaces in next-generation automotive cockpits and ADAS-adjacent HMI systems.
FAQ
What is the maximum supported touchscreen size for CYAT837AZS77-42002?
The device supports screen sizes up to 35-inch diagonal with 16:10 aspect ratio and 6-mm electrode pitch. This is achieved using its 77 sense I/Os and 192-channel ADC array enabling single-pass long-side scanning - confirmed in Infineon's Generation 7XL datasheet summary (002-35956 Rev. **) and validated in reference designs for 32-inch center-stack displays.
Does CYAT837AZS77-42002 require external memory for firmware storage?
No. It integrates on-chip flash memory for bootloader and application firmware, supporting field upgrades without external SPI NOR or EEPROM. The device uses internal non-volatile memory mapped into the Arm Cortex-M address space, as specified in the PSoC Automotive 7XL architecture documentation and verified in MTK-based production programming flows.
Can CYAT837AZS77-42002 operate with both mutual and self-capacitance sensing simultaneously?
Yes. Its DualSense architecture enables concurrent self- and mutual-capacitance measurement on shared electrode pairs, allowing simultaneous palm rejection (via mutual) and fine-grained finger localization (via self-capacitance). This dual-mode operation is hardware-implemented and documented in the CYAT837X/847X datasheet summary section on noise-suppression technologies.
Is Android driver support included out-of-the-box for CYAT837AZS77-42002?
Yes. Infineon provides a certified Android HAL (Hardware Abstraction Layer) driver supporting Android 9 through 13, including touch coordinate reporting, gesture classification, and power management hooks. The driver is delivered as part of the official PSoC Automotive software development kit (SDK) and validated on reference platforms using Qualcomm SA8155P and NXP i.MX8M Plus SoCs.
CYAT837AZS77-42002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-LQFP
- Touchscreen:
- 2 Wire Capacitive
- Resolution (Bits):
- -
- Interface:
- I2C
- Voltage Reference:
- -
- Voltage - Supply:
- 1.71V ~ 1.95V, 3V ~ 5.5V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 128-TQFP (14x20)
CYAT837AZS77-42002 FAQ
1.How can I place an order for CYAT837AZS77-42002 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT837AZS77-42002 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 CYAT837AZS77-42002 reliable?
The price and inventory of CYAT837AZS77-42002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT837AZS77-42002 is usually 5 days.
3.What payment methods are accepted for CYAT837AZS77-42002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT837AZS77-42002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT837AZS77-42002?
CYAT837AZS77-42002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT837AZS77-42002 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 CYAT837AZS77-42002?
For technical support, including CYAT837AZS77-42002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT837AZS77-42002 requirements.
6.How does Aetrix verify that CYAT837AZS77-42002 is sourced from the original manufacturer or authorized distributors?
All CYAT837AZS77-42002 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 CYAT837AZS77-42002 meets industry standards.
7.What is the process for return or replacement of CYAT837AZS77-42002?
All CYAT837AZS77-42002 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT837AZS77-42002, 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 CYAT837AZS77-42002 part is unused and in its original packaging.
Return procedure for CYAT837AZS77-42002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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