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Infineon Technologies CYAT81682-128AS88Z
- Part No.:
- CYAT81682-128AS88Z
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 128-LQFP
- Datasheet:
-
CYAT81682-128AS88Z.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
CYAT81682-128AS88Z from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 128 I/O pins, integrated analog front-end and programmable digital logic, designed for multi-touch gesture recognition in industrial HMI panels requiring high noise immunity and wet-finger operation.
For engineers reviewing the CYAT81682-128AS88Z datasheet, CYAT81682-128AS88Z pinout, CYAT81682-128AS88Z application, or CYAT81682-128AS88Z equivalent, key selection criteria include mutual-capacitance scan resolution (up to 1024 × 1024), integrated CapSense® Sigma-Delta modulator, and support for up to 10 simultaneous touch points with palm rejection.
Technical Context
This device implements a mixed-signal configurable system-on-chip architecture combining ARM Cortex-M0+ CPU core, dedicated CapSense® hardware engine, and programmable analog/digital blocks. It supports both self- and mutual-capacitance sensing modes with on-chip calibration and automatic baseline tracking.
The controller integrates 256 KB flash, 64 KB SRAM, USB 2.0 FS interface, and I²C/SPI/UART peripherals. Its TrueTouch firmware stack enables robust operation under water, glove, and high-noise EMI environments without external shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0+ @ 48 MHz - enables real-time gesture processing and host communication handling |
| CapSense Channels | Up to 128 - supports large-format touchscreens with fine-grained electrode resolution |
| Simultaneous Touch Points | 10 - meets multi-user and complex gesture requirements in kiosk and control panel designs |
| Flash Memory | 256 KB - accommodates full TrueTouch firmware plus customer application code and configuration data |
| Operating Voltage | 1.71–5.5 V - allows direct integration with diverse power domains including 3.3 V and 5 V systems |
| Wet-Finger Support | Yes - maintains reliable detection with >1 mm water layer, eliminating need for overlay redesign |
Pinout & Package
Package: 128-pin QFN (12 mm × 12 mm, 0.4 mm pitch) with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply | Configurable 1.71–5.5 V supply for all GPIOs and CapSense I/Os |
| VDDA | Analog Supply | Dedicated 2.7–5.5 V supply for CapSense analog front-end and ADC |
| SDA/SCL | I²C Interface | Standard-mode/fast-mode I²C bus for host communication and configuration updates |
| USB_DP/USB_DM | USB 2.0 FS PHY | Integrated transceiver supporting HID-compliant touch reporting over USB |
| CTB[0..127] | CapSense Electrode | Programmable mutual/self-capacitance sensor inputs supporting matrix or linear topologies |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Configurable op-amps, comparators, and IDACs enable custom sensor signal conditioning without external components |
| Hardware-Based Gesture Engine | Dedicated logic accelerates pinch-to-zoom, swipe, and rotate detection with <10 ms latency |
| Auto-Tuning Calibration | Real-time baseline and sensitivity adjustment compensates for temperature drift and aging effects |
| Glove Mode Support | Detects 1–3 mm thick gloves using enhanced signal-to-noise ratio and adaptive thresholding |
Applications
| Industrial Control Panel | Medical Diagnostic Display |
|---|---|
Use Scenario: Operator interface on PLC-controlled machinery with oil, dust, and occasional liquid exposure. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 15″ resistive-replacement overlay with 12-button + slider layout. Use Value: Wet-finger and glove operation ensures uninterrupted workflow during maintenance or sterile procedures. | Use Scenario: Touchscreen on ultrasound or MRI console requiring EMI resilience near high-power RF sources. IC Role / Device Role / Timing Role: Immune touch controller interfacing via USB HID to embedded Linux host with zero added latency. Use Value: On-chip EMI filtering and differential sensing reduce false triggers without metal shielding or ground plane redesign. |
| Public Kiosk Terminal | Smart Building Automation Panel |
Use Scenario: Outdoor-facing self-service terminal exposed to rain, UV, and variable ambient temperature. IC Role / Device Role / Timing Role: Multi-touch controller supporting 10-finger gestures and palm rejection for intuitive navigation. Use Value: Integrated water rejection algorithm eliminates false touches from condensation or light rainfall. | Use Scenario: Wall-mounted HVAC and lighting control panel in commercial office environments. IC Role / Device Role / Timing Role: Low-power touch coordinator with wake-on-touch and I²C host handshaking. Use Value: 2.5 µA deep-sleep current extends battery life in wireless retrofit modules powered by coin cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4248LQ-BL583 | Lower channel count (68 I/O), no integrated USB PHY, requires external transceiver | Limited to smaller displays (<7″) and non-USB host interfaces | Select when cost-sensitive and USB not required; verify CapSense firmware compatibility |
| MTCH6302-I/SS | Dedicated touch controller (no MCU), 16-channel max, no programmable logic or flash | Suitable only for simple button/slider overlays, not multi-touch gesture systems | Choose for fixed-function, low-BOM-cost implementations where firmware customization is unnecessary |
Compared with CY8C4248LQ-BL583 and MTCH6302-I/SS, CYAT81682-128AS88Z uniquely combines high-channel-count CapSense, ARM-based programmability, and native USB HID - enabling field-upgradable gesture logic and single-chip integration for large-format industrial touchscreens.
Availability
CYAT81682-128AS88Z is available at Aetrix Electronics and suitable for industrial HMI, medical diagnostic equipment, outdoor kiosks, and smart building automation requiring stable component supply and long-term design-in support.
Supply support for CYAT81682-128AS88Z 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, automotive MCUs, and human-machine interface solutions with global manufacturing and R&D infrastructure.
This part belongs to the PSoC 4 TrueTouch family, engineered specifically for robust, programmable capacitive touch control in harsh electromagnetic and environmental conditions.
FAQ
What is the maximum supported electrode count for mutual-capacitance scanning?
The CYAT81682-128AS88Z supports up to 128 electrodes configured as rows/columns, enabling 64 × 64 mutual-capacitance matrices (4096 nodes) with full hardware-accelerated scanning and noise suppression.
Does this device require an external crystal oscillator?
No - it integrates a precision internal IMO (Internal Main Oscillator) trimmed to ±2% over temperature and voltage, sufficient for USB timing and CapSense measurement. An external crystal is optional for tighter frequency accuracy.
Can the CapSense firmware be updated in the field?
Yes - the device supports bootloader-based firmware updates over I²C or USB HID, allowing runtime patching of gesture algorithms, sensitivity profiles, and noise compensation parameters without hardware modification.
Is there hardware support for proximity sensing without physical touch?
Yes - the CapSense hardware engine includes dedicated proximity detection mode using shield electrodes and low-power scanning, achieving up to 5 cm detection range with configurable thresholds and debounce timing.
CYAT81682-128AS88Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-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:
- 128-TQFP (14x20)
CYAT81682-128AS88Z FAQ
1.How can I place an order for CYAT81682-128AS88Z through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81682-128AS88Z 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 CYAT81682-128AS88Z reliable?
The price and inventory of CYAT81682-128AS88Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81682-128AS88Z is usually 5 days.
3.What payment methods are accepted for CYAT81682-128AS88Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81682-128AS88Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81682-128AS88Z?
CYAT81682-128AS88Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81682-128AS88Z 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 CYAT81682-128AS88Z?
For technical support, including CYAT81682-128AS88Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81682-128AS88Z requirements.
6.How does Aetrix verify that CYAT81682-128AS88Z is sourced from the original manufacturer or authorized distributors?
All CYAT81682-128AS88Z 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 CYAT81682-128AS88Z meets industry standards.
7.What is the process for return or replacement of CYAT81682-128AS88Z?
All CYAT81682-128AS88Z units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81682-128AS88Z, 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 CYAT81682-128AS88Z part is unused and in its original packaging.
Return procedure for CYAT81682-128AS88Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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