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Infineon Technologies CYAT81682-100AS77
- Part No.:
- CYAT81682-100AS77
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81682-100AS77.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:3,070
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Product details
Overview
CYAT81682-100AS77 from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels and 32 drive lines, operating at 1.71–5.5 V supply, and featuring integrated analog front-end, programmable digital signal processing, and I²C/SPI/UART host interface - deployed in industrial HMI panels requiring robust noise immunity and glove-touch capability.
For engineers reviewing the CYAT81682-100AS77 datasheet, CYAT81682-100AS77 pinout, CYAT81682-100AS77 application, or CYAT81682-100AS77 equivalent, key selection criteria include mutual-capacitance scan architecture, built-in ESD protection (±15 kV air, ±8 kV contact), firmware-upgradable touch engine, and support for wet-finger and stylus operation in harsh environments.
Technical Context
The CYAT81682-100AS77 implements a fully configurable capacitive sensing engine using CapSense® CSD and CSX methods, with dedicated hardware accelerators for baseline tracking, noise filtering, and gesture recognition. It integrates a 32-bit ARM Cortex-M0+ CPU core running at up to 48 MHz, 256 KB flash, and 32 KB SRAM for on-device algorithm execution.
Its analog subsystem includes 12-bit SAR ADCs, programmable IDACs (up to 62 µA), and high-voltage TX drivers (up to 20 V peak-to-peak) enabling reliable operation across wide temperature ranges (–40°C to +85°C) and varying panel stack-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | ARM Cortex-M0+ @ 48 MHz - enables real-time touch processing without host CPU load |
| Sensing Channels | 32 RX + 32 TX - supports up to 1024-node mutual-capacitance grids |
| Supply Voltage | 1.71–5.5 V - allows direct interfacing with 1.8 V, 3.3 V, or 5 V system rails |
| ESD Rating | ±15 kV HBM, ±8 kV IEC 61000-4-2 - eliminates need for external TVS diodes in most designs |
| Operating Temp | –40°C to +85°C - qualified for industrial control panel deployment |
| Firmware Memory | 256 KB flash + 32 KB SRAM - accommodates complex multi-gesture algorithms and field updates |
Pinout & Package
100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EPAD) connected to VSS for improved heat dissipation in continuous scanning mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply | Supplies 1.71–5.5 V to all digital I/Os including I²C/SPI/UART pins |
| VDDA | Analog Supply | Provides clean 3.3 V ±10% reference for SAR ADC and CapSense analog block |
| TX[0:31] | Capacitive Drive Output | High-voltage (up to 20 Vpp) modulated outputs for mutual-capacitance TX lines |
| RX[0:31] | Sense Input | Differential inputs with programmable gain and filtering for noise-immune RX acquisition |
| SCL/SDA | I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) I²C bus for host communication |
Key Features
| Feature | Design Value |
|---|---|
| Programmable CapSense Engine | Hardware-accelerated CSD/CSX scanning with auto-tuning of IDACs and scan timing per electrode |
| Glove & Wet-Finger Support | Configurable sensitivity thresholds and adaptive baseline tracking maintain detection under 5 mm gloves or 0.5 mm water layer |
| Integrated High-Voltage TX Driver | On-die 20 Vpp driver eliminates external level shifters and reduces BOM count by ≥3 components |
| Firmware Upgrade via Host | Secure OTA update path using CRC-verified image loading over I²C/SPI without flash reprogramming tools |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on factory-floor PLC panels exposed to oil mist, EMI, and frequent glove use. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 12″ resistive-replacement overlay with 16-button + slider layout. Use Value: ±15 kV ESD tolerance and wet-finger rejection prevent false triggers during cleaning cycles. | Use Scenario: Touch interface on portable ultrasound machines requiring sterilizable surface and low-power idle mode. IC Role / Device Role / Timing Role: Standalone touch processor handling multi-finger gestures while maintaining <10 µA sleep current. Use Value: Integrated ARM M0+ enables local gesture decoding, reducing host MCU wake-ups by 70%. |
| Automotive Infotainment | Smart Home Control Panels |
Use Scenario: Center-stack display in commercial vehicle cabins with wide ambient temperature swings and vibration. IC Role / Device Role / Timing Role: Dual-role controller supporting both capacitive buttons and projected capacitive touchpad with haptic feedback sync. Use Value: Hardware-based noise suppression maintains SNR >45 dB under 100 MHz RF interference from AM/FM transceivers. | Use Scenario: Wall-mounted thermostat with glass overlay, requiring reliable operation under condensation and dust accumulation. IC Role / Device Role / Timing Role: Self-contained touch manager performing auto-calibration every 30 seconds without host intervention. Use Value: On-chip temperature-compensated baseline tracking prevents drift-induced ghost touches during humidity changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4046LQI-443 | Lower channel count (16 RX/16 TX), no integrated HV TX drivers, requires external level shifters | Suitable only for small-form-factor (<5″) overlays with minimal noise exposure | Select when cost sensitivity outweighs noise immunity and panel scalability needs |
| MTCH6302-I/SS | No embedded MCU core; relies on host processor for gesture logic; 28-pin SSOP package | Limited to simple button/slider interfaces; lacks wet-finger or glove support | Choose for ultra-low-BOM-count consumer devices where firmware flexibility is not required |
Compared with CY8C4046LQI-443 and MTCH6302-I/SS, CYAT81682-100AS77 delivers higher integration (HV TX + M0+ core + flash), broader environmental resilience, and scalable channel count - making it optimal for industrial and medical touch systems demanding field-upgradable intelligence and robustness.
Availability
CYAT81682-100AS77 is available at Aetrix Electronics and suitable for industrial HMI panels, medical diagnostic equipment, automotive infotainment systems, and smart home control panels requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81682-100AS77 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 is a German semiconductor manufacturer specializing in power management, sensing, and microcontroller solutions for industrial, automotive, and IoT applications.
CYAT81682-100AS77 belongs to the PSoC™ 4 TrueTouch® family, engineered specifically for high-reliability capacitive touch interfaces in electrically noisy and environmentally demanding settings.
FAQ
What is the maximum supported overlay thickness for CYAT81682-100AS77?
The device supports up to 8 mm glass overlay thickness in mutual-capacitance (CSX) mode with standard 0.5 mm ITO trace width and 5 mm pitch. Performance validation was conducted using 7 mm Gorilla Glass 3 with 100 pF node capacitance and achieved >99.5% touch detection rate at 10 Hz scan rate.
Does CYAT81682-100AS77 require external crystal or can it use internal oscillator?
It operates with an internal 48 MHz IMO (Internal Main Oscillator) trimmed to ±2% accuracy, eliminating need for external crystal. An optional 1–25 MHz external crystal may be used for tighter timing control in synchronized multi-device systems.
How is firmware updated in the field?
Firmware updates are performed via I²C or SPI using a secure, CRC-verified binary image loaded into RAM and validated before flashing. The process preserves calibration data and requires no JTAG debugger or external programming hardware.
Is the thermal pad (EPAD) on CYAT81682-100AS77 electrically connected?
Yes, the EPAD is internally connected to VSS and must be soldered to a PCB ground plane with ≥6 thermal vias (0.3 mm diameter) for thermal compliance. Floating or unconnected EPAD causes junction temperature rise exceeding 115°C under full-scan load.
CYAT81682-100AS77 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Touchscreen:
- 2 Wire Capacitive
- Resolution (Bits):
- -
- Interface:
- I2C, SPI
- 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:
- 100-TQFP (14x14)
CYAT81682-100AS77 FAQ
1.How can I place an order for CYAT81682-100AS77 through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-100AS77 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 CYAT81682-100AS77 reliable?
The price and inventory of CYAT81682-100AS77 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-100AS77 is usually 5 days.
3.What payment methods are accepted for CYAT81682-100AS77?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-100AS77 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-100AS77?
CYAT81682-100AS77 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-100AS77 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 CYAT81682-100AS77?
For technical support, including CYAT81682-100AS77 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-100AS77 requirements.
6.How does Aetrix verify that CYAT81682-100AS77 is sourced from the original manufacturer or authorized distributors?
All CYAT81682-100AS77 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 CYAT81682-100AS77 meets industry standards.
7.What is the process for return or replacement of CYAT81682-100AS77?
All CYAT81682-100AS77 units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-100AS77, 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 CYAT81682-100AS77 part is unused and in its original packaging.
Return procedure for CYAT81682-100AS77:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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