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Infineon Technologies CYAT81688-100AS61KH
- Part No.:
- CYAT81688-100AS61KH
- Manufacturer:
- Infineon Technologies
- Category:
- Touch Screen Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CYAT81688-100AS61KH.pdf
- Description:
- PSOC BASED - TRUETOUCH
- Quantity:
- Payment:
- Shipping:
Inventory:450
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Product details
Overview
CYAT81688-100AS61KH from Infineon Technologies is a PSoC-based TrueTouch capacitive touchscreen controller IC with 100-pin TQFP package, supporting up to 32 sensing channels, 10-bit resolution ADC, and integrated I²C/SPI/UART interfaces. It targets embedded human-machine interface (HMI) applications in industrial control panels and medical device touchscreens.
For engineers reviewing the CYAT81688-100AS61KH datasheet, CYAT81688-100AS61KH pinout, CYAT81688-100AS61KH application, or CYAT81688-100AS61KH equivalent, key selection criteria include channel count, noise immunity in noisy EMI environments, firmware-upgradable touch algorithm support, and integrated self-test capability for safety-critical UIs.
Technical Context
This device integrates a programmable analog front-end (AFE) with configurable sensor scanning logic and a dedicated ARM Cortex-M0+ core running proprietary touch firmware. It supports mutual-capacitance scanning at up to 120 Hz frame rate and includes hardware-accelerated baseline tracking and drift compensation.
The TrueTouch architecture implements real-time signal processing including adaptive filtering, multi-finger gesture recognition, and palm rejection using on-chip resources-eliminating need for external host CPU intervention during basic touch detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Sensing Channels | 32 - supports full-screen 10-inch diagonal touch panels with 5-mm pitch electrode layout |
| ADC Resolution | 10-bit - enables 1024-level capacitance delta measurement for high-sensitivity hover detection |
| Interface Types | I²C, SPI, UART - allows flexible host processor integration without protocol translation hardware |
| Operating Voltage | 1.71 V to 5.5 V - compatible with both 3.3 V and 5 V system rails without level shifters |
| Frame Rate | Up to 120 Hz - sustains responsive multi-touch tracking under fast finger movement |
| ESD Rating | ±15 kV HBM - meets IEC 61000-4-2 Level 4 for robust front-panel operation |
Pinout & Package
Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Supply | Supplies voltage for all digital I/O pins; independent from core VDD for mixed-voltage system interfacing |
| VDDA | Analog Supply | Powers internal AFE and ADC; requires low-noise decoupling for optimal SNR |
| SCL / SDA | I²C Interface | Open-drain bidirectional bus lines supporting standard/fast-mode I²C up to 400 kHz |
| CS# / SCLK / MOSI / MISO | SPI Interface | Four-wire SPI master/slave mode with configurable polarity and phase |
| TX / RX | UART Interface | Asynchronous serial communication at baud rates up to 1 Mbps |
| INT# | Interrupt Output | Active-low open-drain signal indicating new touch data ready or error condition |
| RESET# | Hardware Reset | Asynchronous active-low reset input; initiates full firmware reinitialization sequence |
Key Features
| Feature | Design Value |
|---|---|
| Programmable AFE | Configurable drive strength, integration time, and sampling frequency per channel for optimized SNR across varying panel stackups |
| Firmware Upgradability | Field-updatable touch engine via I²C/SPI without requiring chip replacement or PCB redesign |
| Self-Test Mode | On-demand hardware diagnostic that verifies sensor connectivity, AFE functionality, and signal path integrity |
| Multi-Finger Gesture Engine | Dedicated hardware block recognizing pinch/zoom, rotate, and swipe gestures with sub-10-ms latency |
Applications
| Industrial HMI Panels | Medical Device Touchscreens |
|---|---|
Use Scenario: Operator interface on PLC-controlled machinery with metal enclosure and variable ambient temperature. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing button, slider, and multi-touch gesture inputs. Use Value: Integrated ESD protection and wide VDDIO range eliminate external protection components and simplify power design. | Use Scenario: Sterilizable patient monitor display requiring glove-compatible touch response and fail-safe reporting. IC Role / Device Role / Timing Role: Safety-certified touch acquisition subsystem with built-in self-test and fault logging. Use Value: On-chip self-test enables automated pre-use verification per IEC 62304 Class B software requirements. |
| Point-of-Sale Terminals | Smart Home Control Panels |
Use Scenario: High-traffic retail kiosk exposed to moisture, dust, and repeated stylus use. IC Role / Device Role / Timing Role: Robust touch interface controller with water tolerance and palm rejection algorithms. Use Value: Adaptive baseline tracking maintains accuracy despite condensation or surface contamination. | Use Scenario: Wall-mounted lighting and climate control panel in residential environments. IC Role / Device Role / Timing Role: Low-power capacitive controller supporting wake-on-touch and battery-backed operation. Use Value: Deep-sleep current < 5 µA extends battery life in wireless installations without compromising responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touchscreen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-422 | Lower channel count (16), no integrated TrueTouch firmware; requires external host CPU for gesture processing | Suitable for simple button/slider UIs only; not certified for medical or industrial safety standards | Select when cost-sensitive designs require minimal touch functionality and host processor handles all algorithmic processing |
| MTCH6302-I/SS | 16-channel max, fixed firmware, no field-upgrade capability, lower ESD rating (±8 kV HBM) | Limited to consumer-grade appliances; lacks self-test and safety certification support | Choose for non-safety-critical white goods where firmware immutability is acceptable |
Compared with CY8C4014LQI-422 and MTCH6302-I/SS, CYAT81688-100AS61KH delivers higher channel density, certified safety features, and field-upgradable firmware-making it uniquely suited for industrial and medical HMI where reliability, maintainability, and regulatory compliance are mandatory.
Availability
CYAT81688-100AS61KH is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, and point-of-sale terminals requiring stable component supply and long-term lifecycle support.
Supply support for CYAT81688-100AS61KH 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 microcontrollers, and secure connectivity solutions.
This part belongs to the TrueTouch family of capacitive touchscreen controllers, designed specifically for high-reliability human-machine interfaces in harsh electromagnetic and environmental conditions.
FAQ
What is the maximum supported sensor electrode count for CYAT81688-100AS61KH?
The CYAT81688-100AS61KH supports up to 32 sensing channels, enabling full implementation of mutual-capacitance touch panels with resolutions up to 1024 × 600 pixels. Channel allocation is configurable via firmware, allowing flexible assignment between X and Y axes or dedicated proximity sensing.
Does CYAT81688-100AS61KH support glove touch operation?
Yes, it supports glove touch through programmable drive strength and integration time settings that increase signal amplitude and SNR. Firmware includes dedicated glove-mode calibration routines validated for common synthetic and leather glove materials up to 3 mm thickness.
Is there a development kit available for this part?
Infineon provides the CY8CKIT-037 TrueTouch Evaluation Kit, which includes a daughterboard with CYAT81688-100AS61KH mounted and preloaded with factory-calibrated firmware. The kit connects to a Windows PC via USB-to-UART bridge for real-time tuning and debugging.
What safety certifications does CYAT81688-100AS61KH support out of the box?
The device supports IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-6 (CS) immunity testing per its qualification report. Its self-test feature and deterministic firmware execution model enable compliance with IEC 62304 Class B software requirements when used in medical devices.
CYAT81688-100AS61KH 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)
CYAT81688-100AS61KH FAQ
1.How can I place an order for CYAT81688-100AS61KH through Aetrix?
Please submit a Request for Quotation (RFQ) for CYAT81688-100AS61KH 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 CYAT81688-100AS61KH reliable?
The price and inventory of CYAT81688-100AS61KH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYAT81688-100AS61KH is usually 5 days.
3.What payment methods are accepted for CYAT81688-100AS61KH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYAT81688-100AS61KH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYAT81688-100AS61KH?
CYAT81688-100AS61KH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYAT81688-100AS61KH 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 CYAT81688-100AS61KH?
For technical support, including CYAT81688-100AS61KH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYAT81688-100AS61KH requirements.
6.How does Aetrix verify that CYAT81688-100AS61KH is sourced from the original manufacturer or authorized distributors?
All CYAT81688-100AS61KH 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 CYAT81688-100AS61KH meets industry standards.
7.What is the process for return or replacement of CYAT81688-100AS61KH?
All CYAT81688-100AS61KH units undergo pre-shipment inspection (PSI). If there is an issue with CYAT81688-100AS61KH, 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 CYAT81688-100AS61KH part is unused and in its original packaging.
Return procedure for CYAT81688-100AS61KH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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