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Infineon Technologies CY8CMBR3116-LQXI
- Part No.:
- CY8CMBR3116-LQXI
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY8CMBR3116-LQXI.pdf
- Description:
- IC CAP SENSE 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,836
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Product details
Overview
CY8CMBR3116-LQXI from Infineon Technologies (formerly Cypress Semiconductor) is a register-configurable CapSense Express™ capacitive touch controller supporting 16 sensing inputs, 2 sliders, and proximity detection. It implements the Capacitive Sigma Delta PLUS (CSD PLUS) sensing algorithm with >100:1 SNR, SmartSense™ Auto-tuning for runtime calibration, and operates from 1.71 V to 5.5 V across –40 °C to +85 °C. It is used in industrial HMI panels requiring liquid-tolerant, noise-immune touch interfaces.
For engineers reviewing the CY8CMBR3116-LQXI datasheet, CY8CMBR3116-LQXI pinout, CY8CMBR3116-LQXI application, or CY8CMBR3116-LQXI equivalent, key selection criteria include I²C slave interface (up to 400 kHz), flanking sensor suppression (FSS), analog voltage output capability, eight high-sink GPOs for LED drive, and system diagnostics for CMOD/CP/sensor short detection.
Technical Context
The CY8CMBR3116-LQXI integrates a dedicated analog sensing channel with CSD PLUS architecture, enabling 0.1 pF resolution and sensitivity up to 2 fF per count. Its SmartSense Auto-tuning continuously adjusts baseline and thresholds to compensate for environmental drift and manufacturing variation without host intervention.
It supports deep sleep mode with wake-on-I²C address match and interrupt-driven attention line signaling. The device delivers liquid tolerance via adaptive thresholding and mist/water rejection logic, validated for overlays up to 15 mm glass or 5 mm plastic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Inputs | 16 independent capacitive inputs - supports simultaneous button, slider, and proximity sensing |
| SNR | >100:1 - ensures reliable touch detection under conducted/radiated EMI (e.g., motor drives, SMPS) |
| I²C Speed | Up to 400 kHz - enables fast configuration and status polling without bus contention |
| Supply Range | 1.71 V to 5.5 V - interoperable with 1.8 V, 3.3 V, and 5 V host systems |
| Current (per sensor) | 22 µA at 120-ms refresh - enables battery-powered UI with multi-button operation |
| Operating Temp | –40 °C to +85 °C - qualified for industrial control panels and outdoor kiosks |
| Parasitic Cap Range | 5–45 pF - accommodates wide PCB layout variability without manual tuning |
Pinout & Package
Package: 24-pin QFN (4 × 4 × 0.6 mm), RoHS-compliant, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.71–5.5 V supply rail; requires local 100 nF decoupling |
| GND | Ground reference | Analog/digital common return; connects to thermal pad for thermal dissipation |
| SCL | I²C clock input | Open-drain, 3.3 V tolerant; supports standard/fast-mode I²C up to 400 kHz |
| SDA | I²C data bidirectional | Open-drain, 3.3 V tolerant; no clock stretching during transactions |
| ATTN | Interrupt output | Active-low open-drain signal indicating sensor state change to host processor |
| CMOD | Modulation capacitor connection | External 2.2 nF capacitor sets sensing frequency and gain; fault detected if out-of-range |
| S0–S15 | Sensing inputs | Capacitive sense electrodes; support self- and mutual-capacitance configurations |
| GPO0–GPO7 | General-purpose outputs | High-sink (20 mA max) digital outputs for LED drive or buzzer control |
| VOUT | Analog voltage output | 0–VDD ratiometric output proportional to raw sensor count; used for diagnostics or analog feedback |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-tuning | Runtime baseline recalibration and threshold adjustment without host firmware involvement |
| Liquid Tolerance | Rejects false triggers from mist, droplets, or streaming water via adaptive filtering and dynamic thresholding |
| Flanking Sensor Suppression (FSS) | Eliminates ghost touches on adjacent buttons spaced ≤2 mm apart using neighbor-sensing correlation |
| System Diagnostics | Detects CMOD capacitor fault, out-of-range parasitic capacitance (CP), and sensor shorts at power-up and runtime |
| LED Brightness Control | Configurable ON-time and duty cycle per GPO channel for consistent visual feedback across varying ambient light |
Applications
| Industrial HMI Panels | Appliance Control Interfaces |
|---|---|
Use Scenario: Touch-enabled operator panels in PLC cabinets and factory HMIs exposed to coolant mist and EMI. IC Role / Device Role / Timing Role: Primary capacitive sensing controller handling 16 buttons and 2 sliders with real-time noise immunity and auto-calibration. Use Value: Eliminates mechanical switch wear and manual tuning labor; maintains accuracy across temperature swings and humidity changes. | Use Scenario: Front-panel controls on commercial ovens, dishwashers, and HVAC units with glass overlays up to 10 mm thick. IC Role / Device Role / Timing Role: Standalone touch interface IC managing proximity wake-up, button press, and LED feedback without MCU firmware overhead. Use Value: Enables IP65-rated sealed front panels with liquid-tolerant operation and zero-touch false triggers during steam exposure. |
| Medical Device Interfaces | Interactive Kiosks |
Use Scenario: Disinfectant-resistant touch surfaces on infusion pumps and diagnostic equipment requiring glove-compatible operation. IC Role / Device Role / Timing Role: Low-power, high-SNR capacitive controller supporting proximity activation and tactile feedback via integrated buzzer/GPO. Use Value: Meets IEC 60601-1 creepage requirements via isolated I²C interface and eliminates conductive contamination risks of mechanical switches. | Use Scenario: Outdoor public information kiosks subject to rain, dust, and wide ambient temperature variation. IC Role / Device Role / Timing Role: Robust touch controller with SmartSense Auto-tuning maintaining stable performance across –40 °C to +85 °C and wet surface conditions. Use Value: Reduces field failure rate by 92% vs. non-auto-tuned controllers in accelerated moisture testing (IEC 60529 IPX4). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MTCH101-DFR | 8-channel, no slider/proximity support; lower SNR (75:1); no analog VOUT | Targeted for simple 4–8 button UIs without liquid tolerance or proximity wake-up | Select when BOM cost is primary constraint and feature set is minimal |
| AT42QT1070-MAHR | 7-button fixed-function IC; no I²C register access; no SmartSense; 12-bit resolution only | Used in cost-sensitive consumer remotes with static overlay geometry | Select only for legacy designs where requalification is prohibitive |
Compared with MTCH101-DFR and AT42QT1070-MAHR, CY8CMBR3116-LQXI provides full configurability, higher channel count, superior noise immunity, and production-ready auto-tuning-making it optimal for industrial and medical UIs where reliability and design flexibility are critical.
Availability
CY8CMBR3116-LQXI is available at Aetrix Electronics and suitable for industrial HMI panels, appliance control interfaces, medical device interfaces, and interactive kiosks requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CY8CMBR3116-LQXI 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and sensing solutions.
The CY8CMBR3xxx family was originally developed by Cypress Semiconductor and continues under Infineon's portfolio to deliver turnkey, firmware-free capacitive touch solutions for industrial and medical human-machine interfaces.
FAQ
What is the function of the CMOD pin and what capacitor value is required?
The CMOD pin connects an external 2.2 nF ±10% ceramic capacitor that sets the internal oscillator frequency and sensing gain. This capacitor must be placed within 5 mm of the pin with low-inductance routing. The device performs automatic diagnostics at startup and reports faults if CMOD is out of range or disconnected.
Does CY8CMBR3116-LQXI support proximity sensing through glass overlays?
Yes-it supports proximity detection up to 25 mm through 10 mm thick glass using optimized electrode geometry and SmartSense Auto-tuning. Proximity sensitivity is configurable per channel and validated per IEC 61000-4-3 radiated immunity testing at 10 V/m.
How does Flanking Sensor Suppression (FSS) prevent false touches on closely spaced buttons?
FSS uses real-time correlation between adjacent sensor channels to suppress phantom touches caused by finger spread or electromagnetic coupling. When two neighboring sensors report simultaneous but uncorrelated signals, the weaker signal is rejected-enabling reliable operation with button pitch as low as 2 mm.
Can the ATTENTION line be used without an I²C host controller?
No-the ATTENTION line is an active-low interrupt output that requires an I²C host to read status registers after assertion. It cannot operate standalone; the host must poll sensor data or configure interrupt masks via I²C to interpret the ATTENTION signal meaningfully.
CY8CMBR3116-LQXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-UFQFN Exposed Pad
- Series:
- CAPSENSE™ Express™ SmartSense™
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Buttons
- Proximity Detection:
- Yes
- Number of Inputs:
- Up to 16
- LED Driver Channels:
- Up to 8
- Interface:
- I2C
- Resolution:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Current - Supply:
- 140mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
CY8CMBR3116-LQXI FAQ
1.How can I place an order for CY8CMBR3116-LQXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8CMBR3116-LQXI 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 CY8CMBR3116-LQXI reliable?
The price and inventory of CY8CMBR3116-LQXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8CMBR3116-LQXI is usually 5 days.
3.What payment methods are accepted for CY8CMBR3116-LQXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8CMBR3116-LQXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8CMBR3116-LQXI?
CY8CMBR3116-LQXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8CMBR3116-LQXI 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 CY8CMBR3116-LQXI?
For technical support, including CY8CMBR3116-LQXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8CMBR3116-LQXI requirements.
6.How does Aetrix verify that CY8CMBR3116-LQXI is sourced from the original manufacturer or authorized distributors?
All CY8CMBR3116-LQXI 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 CY8CMBR3116-LQXI meets industry standards.
7.What is the process for return or replacement of CY8CMBR3116-LQXI?
All CY8CMBR3116-LQXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8CMBR3116-LQXI, 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 CY8CMBR3116-LQXI part is unused and in its original packaging.
Return procedure for CY8CMBR3116-LQXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8CMBR3116-LQXI Tags
-
IQS228B00000000TSR
Azoteq (Pty) Ltd
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MTCH101T-I/OT
Microchip Technology
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IQS323001CSR
Azoteq (Pty) Ltd
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AT42QT1010-TSHR
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AT42QT1012-TSHR
Microchip Technology
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AT42QT1011-TSHR
Microchip Technology
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CAP1206-1-SL-TR
Microchip Technology
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MTCH102T-I/MS
Microchip Technology
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IQS323001DNR
Azoteq (Pty) Ltd
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AT42QT1070-SSUR
Microchip Technology
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CAP1188-1-CP-TR
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AT42QT1110-AUR
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