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Infineon Technologies CYAT837AZA77-42002
- Part No.:
- CYAT837AZA77-42002
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT837AZA77-42002.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
CYAT837AZA77-42002 from Infineon is an AEC-Q100 qualified automotive-grade multitouch capacitive touchscreen controller featuring a 32-bit Arm® Cortex® CPU, 77 sense I/Os, 128-pin TQFP package, -40°C to 85°C operating range, and support for wet-finger tracking, glove operation (≤5 mm), and 10-finger reporting - deployed in infotainment displays up to 35-inch diagonal.
For engineers reviewing the CYAT837AZA77-42002 datasheet, CYAT837AZA77-42002 pinout, CYAT837AZA77-42002 application, or CYAT837AZA77-42002 equivalent, key selection criteria include sense channel count (77), glove/water rejection capability, I²C host interface (up to 1 Mbps), multi-phase TX architecture (150 kHz max), and automotive temperature grade (A).
Technical Context
This device operates as the master chip in a multichip PSoC™ Automotive Generation 7XL touchscreen system, integrating register-configurable touch sensing with DualSense technology for simultaneous self-capacitance and mutual-capacitance measurement. It implements AutoArmor for EMI suppression and DisplayArmor for display noise immunity.
The controller supports single-pass long-side scanning via 192 dedicated ADC channels, enabling up to 120 Hz refresh rate and 296 total sense pins across multi-chip configurations. Its 5-V TX drive with 17-phase multi-phase capability delivers effective 20-V signal swing for enhanced SNR in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense I/O Count | 77 dedicated sense pins - defines maximum electrode count and sensor resolution for medium-size automotive displays |
| Operating Temp Range | -40°C to +85°C (Automotive-A grade) - validated for cabin-mounted infotainment systems without active cooling |
| Host Interface | I²C slave at 100/400 kbps and 1 Mbps - enables low-latency communication with MCU or SoC without requiring additional protocol translation |
| TX Frequency Max | 150 kHz - allows optimized scan timing and noise separation from display switching harmonics |
| Power Supply | 1.71–1.95 V core / 3.0–5.5 V I/O & analog - supports dual-rail power domain isolation for noise-sensitive analog front-end |
| Refresh Rate | Up to 120 Hz - meets real-time responsiveness requirements for gesture-driven UI in automotive HMI |
| Touch Reporting | Up to 10 fingers with 5-mm glove support - enables reliable input under winter driving conditions with thick gloves |
Pinout & Package
Package: 128-pin TQFP (14 × 20 × 1.4 mm, 0.5-mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | 3.0–5.5 V rail powering GPIOs, I²C interface, and internal logic - must be decoupled locally per Infineon layout guidelines |
| VDDA | Analog supply | 3.0–5.5 V dedicated rail for ADCs and analog front-end - requires separate filtering from digital supplies to maintain SNR |
| VDDCORE | Core logic supply | 1.71–1.95 V supply for Arm Cortex-M CPU and digital subsystem - sensitive to ripple; needs low-ESR ceramic capacitor |
| SCL / SDA | I²C host interface | Open-drain bidirectional lines supporting standard/fast/high-speed modes - require external pull-ups to VDDIO |
| SENSE[0:76] | Capsense electrode inputs | 77 configurable analog inputs for mutual/self-capacitance sensing - routed to internal 192-channel ADC array with per-channel gain control |
| TX[0:16] | Multiphase transmit outputs | 17 dedicated TX drivers supporting high-order phase-shifted waveforms - enables 20-V effective drive for improved SNR in EMI-heavy cabins |
| RESETn | Active-low reset | Asynchronous hardware reset input - asserted low for ≥10 µs to initialize firmware and clear touch state machine |
Key Features
| Feature | Design Value |
|---|---|
| DualSense technology | Simultaneous self- and mutual-capacitance measurement on same electrodes - enables robust wet-finger tracking and large-object rejection without sensor redesign |
| AutoArmor EMI mitigation | Integrated hardware-based emission and immunity enhancement - reduces need for external shielding and board-level filtering in head unit PCBs |
| Water rejection algorithm | Real-time capacitance baseline adaptation during liquid presence - maintains touch functionality during rain-splashed or condensation-affected operation |
| Glove mode auto-switching | Automatic detection of glove thickness (≤1 mm thin / ≤5 mm thick) and dynamic parameter reconfiguration - eliminates manual UI mode selection |
| Field-upgradable firmware | Secure bootloader supporting signed OTA updates over I²C - enables post-deployment feature enhancements and calibration corrections |
Applications
| Infotainment Display Control | Driver Information System (DIS) |
|---|---|
Use Scenario: 12–15-inch central touchscreen in premium vehicle infotainment units with AMOLED display and metal-mesh sensor stack. IC Role / Device Role / Timing Role: Master multitouch controller managing all capacitive sensing, gesture processing, and I²C reporting to application processor. Use Value: 77-sense-pin capacity supports 16:10 aspect ratio at 6-mm electrode pitch; 120 Hz refresh ensures lag-free swipe/gesture response. | Use Scenario: Digital instrument cluster with integrated touch controls for menu navigation and driver-assist settings. IC Role / Device Role / Timing Role: Dedicated touch controller offloading gesture processing from main cluster MCU to reduce latency and thermal load. Use Value: Wet-finger and glove tracking ensure usability in all weather; AEC-Q100 qualification guarantees reliability over 15-year vehicle lifecycle. |
| Passenger Seat Entertainment | Head-Up Display (HUD) Touch Overlay |
Use Scenario: Rear-seat 10-inch touchscreen with PET substrate and LCD display, used for media control and climate adjustment. IC Role / Device Role / Timing Role: Multichip master coordinating with slave controllers to extend sensing area beyond single-chip limits. Use Value: 192-channel ADC architecture enables single-pass scanning - cuts frame time by ~40% vs. legacy sequential scanning. | Use Scenario: Transparent capacitive overlay mounted on HUD combiner glass for driver-accessible touch interaction without obstructing optical path. IC Role / Device Role / Timing Role: Low-noise, high-SNR controller compensating for optical coating interference and ambient light-induced capacitance drift. Use Value: 20-V effective TX drive and DisplayArmor suppress display switching noise - maintains >99% touch accuracy during HUD brightness modulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multitouch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CYAT837AZS77-42002 | Same silicon, extended temperature range (-40°C to +105°C) | Required for engine bay–adjacent or sun-exposed mounting locations | Select when ambient operating temperature exceeds 85°C |
| CYAT847AZA77-42002 | Slave configuration in multichip topology; no master firmware or boot ROM | Used only as secondary controller in systems with ≥2 chips; cannot operate standalone | Select only when expanding sense channel count beyond 77 using multichip daisy-chain |
Compared with CYAT837AZA77-42002, the S-grade variant offers higher thermal margin but identical functionality, while the CYAT847AZA77-42002 provides scalable channel expansion at the cost of standalone operation - choice depends strictly on thermal environment and system architecture.
Availability
CYAT837AZA77-42002 is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and passenger entertainment modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for CYAT837AZA77-42002 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 ICs, and security solutions, with global R&D and manufacturing infrastructure.
CYAT837X belongs to the PSoC™ Automotive Multitouch Generation 7XL product line, engineered specifically for high-reliability, noise-immune capacitive touch interfaces in automotive human-machine interaction systems.
FAQ
What is the difference between CYAT837AZA77-42002 and CYAT837AZS77-42002?
The CYAT837AZA77-42002 is rated for -40°C to +85°C (Automotive-A grade), while the CYAT837AZS77-42002 extends to -40°C to +105°C (Automotive-S grade). Both share identical pinout, firmware, and electrical specifications - only thermal qualification differs. The S-grade version is required for under-hood or dashboard locations exposed to peak solar loading.
Does CYAT837AZA77-42002 support Android natively?
Yes - Infineon provides certified Android touch drivers compatible with Android 9 through 13, including HAL integration, gesture mapping, and power-aware suspend/resume handling. Driver source code and integration guides are available via MyICP after registration and NDA completion.
Can CYAT837AZA77-42002 operate as a standalone controller without slave chips?
Yes - it is the master controller in the Generation 7XL multichip architecture and includes full firmware, boot ROM, and host interface logic. It supports up to 77 sense I/Os independently; slave chips (e.g., CYAT847X) extend channel count but are optional for designs within its native capacity.
What is the minimum electrode pitch supported with this device?
The device supports 6-mm electrode pitch as validated in reference designs with Manhattan and diamond sensor layouts. Finer pitches down to 4 mm are feasible with layout optimization and noise mitigation, but require custom tuning of TX frequency, gain, and baseline tracking parameters - not guaranteed across all sensor stackups.
CYAT837AZA77-42002 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 ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 128-TQFP (14x20)
CYAT837AZA77-42002 FAQ
1.How can I place an order for CYAT837AZA77-42002 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT837AZA77-42002 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 CYAT837AZA77-42002 reliable?
The price and inventory of CYAT837AZA77-42002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT837AZA77-42002 is usually 5 days.
3.What payment methods are accepted for CYAT837AZA77-42002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT837AZA77-42002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT837AZA77-42002?
CYAT837AZA77-42002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT837AZA77-42002 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 CYAT837AZA77-42002?
For technical support, including CYAT837AZA77-42002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT837AZA77-42002 requirements.
6.How does Aetrix verify that CYAT837AZA77-42002 is sourced from the original manufacturer or authorized distributors?
All CYAT837AZA77-42002 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 CYAT837AZA77-42002 meets industry standards.
7.What is the process for return or replacement of CYAT837AZA77-42002?
All CYAT837AZA77-42002 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT837AZA77-42002, 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 CYAT837AZA77-42002 part is unused and in its original packaging.
Return procedure for CYAT837AZA77-42002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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