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Infineon Technologies CY8CMBR3116-LQXIT
- Part No.:
- CY8CMBR3116-LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY8CMBR3116-LQXIT.pdf
- Description:
- IC CAP SENSE 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,356
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Product details
Overview
CY8CMBR3116-LQXIT from Infineon Technologies (formerly Cypress) 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-LQXIT datasheet, CY8CMBR3116-LQXIT pinout, CY8CMBR3116-LQXIT application, or CY8CMBR3116-LQXIT equivalent, key selection criteria include I²C slave interface (up to 400 kHz), 22 µA average current per sensor at 120-ms refresh, flanking sensor suppression (FSS), analog voltage output, and eight high-sink GPOs for LED feedback.
Technical Context
The CY8CMBR3116-LQXIT integrates a dedicated analog sensing channel with CSD PLUS modulation, enabling 0.1 pF sensitivity and support for overlay thickness up to 15 mm (glass) or 5 mm (plastic). Its SmartSense Auto-tuning continuously adjusts baseline and thresholds using real-time environmental compensation without host intervention.
It features an I²C slave interface with wake-on-hardware address match, deep sleep mode with interrupt/I²C wake-up, and system diagnostics for CMOD capacitor validation, CP out-of-range detection, and sensor short monitoring - all configurable via 8-bit registers accessible over I²C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Inputs | 16 independent capacitive sensing channels for buttons, sliders, or proximity sensors |
| SNR | >100:1 - ensures reliable touch detection in high-noise industrial environments |
| Supply Voltage | 1.71 V to 5.5 V - supports single-supply operation across battery and rail-powered systems |
| Current Consumption | 22 µA per sensor at 120-ms refresh - enables multi-button UIs with ultra-low power budget |
| I²C Speed | Up to 400 kHz - allows fast configuration and status polling without bus contention |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and automotive cabin-adjacent applications |
| Parasitic Cap Range | 5 pF to 45 pF - accommodates wide layout variation and sensor geometry without re-tuning |
Pinout & Package
The CY8CMBR3116-LQXIT is housed in a 24-pin QFN package (4 × 4 × 0.6 mm), thermally enhanced with exposed thermal pad, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.71–5.5 V supply rail; requires local 1-µF ceramic decoupling |
| GND | Ground reference | Analog/digital common return; must be low-impedance and separated from noisy digital ground |
| SCL | I²C clock input | Open-drain input compatible with 3.3 V or 5 V hosts; internal pull-up not provided |
| SDA | I²C data I/O | Open-drain bidirectional line; requires external pull-up resistor (typically 4.7 kΩ) |
| INT | Interrupt output | Active-low open-drain signal indicating sensor state change; wakes host on event |
| RESET | Hardware reset input | Active-low asynchronous reset; internal pull-up enabled; debounced externally recommended |
| CPx (1–16) | Capsense input | Direct connection to sensor electrodes; each supports self- or mutual-capacitance measurement |
| GPO0–GPO7 | General-purpose output | High-sink (20 mA max) outputs for driving LEDs or buzzer; software-configurable polarity and timing |
| AVOUT | Analog voltage output | 0–VDD ratiometric output proportional to raw sensor count; used for diagnostics or analog feedback |
Key Features
| Feature | Design Value |
|---|---|
| Liquid tolerance | Rejects false triggers from mist, droplets, or streaming water via adaptive baseline tracking and FSS |
| SmartSense Auto-tuning | Eliminates manual tuning by dynamically adjusting sensor thresholds and scan parameters in real time |
| Flanking Sensor Suppression | Prevents adjacent button crosstalk in dense layouts by suppressing neighboring channel responses during active detection |
| System diagnostics | Detects CMOD fault, CP out-of-range, and sensor shorts - reports via I²C status registers for production test automation |
| LED brightness control | Configurable ON-time and duty cycle per GPO channel, enabling visual feedback intensity matching user preference or ambient light |
Applications
| Industrial Control Panel | Home Appliance Interface |
|---|---|
Use Scenario: Touch-enabled operator panel on PLC-mounted HMIs with IP65-rated front bezel and condensation-prone enclosures. IC Role / Device Role / Timing Role: Primary capacitive sensing controller managing 12 buttons and 2 linear sliders; handles all raw capacitance measurement, filtering, and event reporting via I²C. Use Value: Liquid tolerance prevents false actuation from humidity or cleaning sprays; SmartSense maintains consistent response across temperature swings from 0 °C to 70 °C. | Use Scenario: Glass-topped oven or dishwasher control with hidden capacitive keys under 8-mm tempered glass. IC Role / Device Role / Timing Role: Standalone touch controller interfacing to MCU host; provides interrupt-driven status updates and LED feedback via GPOs. Use Value: 15-mm glass overlay support enables seamless aesthetic integration; 22 µA/sensor enables battery-backed backup operation during AC loss. |
| Medical Device Keypad | Automotive Cabin Controller |
Use Scenario: Disinfectant-resistant touch interface on portable diagnostic equipment requiring frequent wipe-downs. IC Role / Device Role / Timing Role: Noise-immune capacitive controller with built-in diagnostics for ISO 13485-compliant production test and field recalibration. Use Value: >100:1 SNR rejects EMI from nearby motors or RF transceivers; system diagnostics flag sensor degradation before failure. | Use Scenario: Center console touch controls in vehicles where ambient temperature ranges from –40 °C to +85 °C and ESD events are frequent. IC Role / Device Role / Timing Role: Automotive-qualified capacitive controller handling proximity wake-up and touch confirmation with integrated ESD protection on all pins. Use Value: Industrial temp grade ensures reliability across climate zones; flanking sensor suppression avoids misreads during glove use or accidental palm contact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT2120-MAHR | 12-channel QTouch controller; no slider/proximity support; fixed threshold, no auto-tuning | Limited to basic button arrays; lacks liquid tolerance and analog output | Choose for cost-sensitive, low-channel-count designs without dynamic environmental adaptation needs |
| STM32F070CBT6 + Touch Library | ARM Cortex-M0 MCU with software-based touch; requires firmware development and tuning effort | Offers full programmability but extends development cycle; higher BOM and validation overhead | Choose when custom gesture logic, multi-modal sensing, or co-processing with other peripherals is required |
Compared with AT42QT2120-MAHR and STM32F070CBT6, the CY8CMBR3116-LQXIT delivers faster time-to-market via register-only configuration, eliminates firmware dependency, and guarantees robust performance in wet/noisy conditions - critical for industrial and appliance deployments.
Availability
CY8CMBR3116-LQXIT is available at Aetrix Electronics and suitable for industrial HMI panels, home appliance interfaces, medical device keypads, and automotive cabin controllers requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for CY8CMBR3116-LQXIT 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, sensing, and connectivity solutions for industrial, automotive, and IoT applications.
The CY8CMBR3xxx family was originally developed by Cypress Semiconductor and continues under Infineon's portfolio to deliver turnkey, firmware-free capacitive touch solutions targeting rapid UI deployment in harsh or space-constrained environments.
FAQ
What is the maximum overlay thickness supported by CY8CMBR3116-LQXIT?
The CY8CMBR3116-LQXIT supports up to 15 mm of glass or 5 mm of plastic overlay thickness while maintaining reliable touch detection. This capability is enabled by its 0.1 pF sensitivity and CSD PLUS sensing algorithm, which achieves high signal-to-noise ratio even with large parasitic capacitance introduced by thick dielectrics.
Does CY8CMBR3116-LQXIT require firmware development?
No - the CY8CMBR3116-LQXIT is register-configurable via I²C and requires no firmware development. All functionality - including button/slider mapping, sensitivity, LED timing, and diagnostics - is set through 8-bit configuration registers. The EZ-Click Customizer GUI tool enables full setup without coding.
How does SmartSense Auto-tuning improve production yield?
SmartSense Auto-tuning automatically calibrates sensor thresholds and scan parameters during power-up and runtime, compensating for PCB stack-up variation, sensor trace length differences, and component tolerances. This eliminates manual tuning per unit or batch, reducing production test time and increasing first-pass yield in high-volume manufacturing.
Can CY8CMBR3116-LQXIT detect proximity without physical touch?
Yes - the device supports true proximity sensing using the same electrode array as touch buttons. It detects conductive objects within ~20–50 mm (depending on electrode size and layout) by monitoring baseline capacitance shifts. Proximity mode is configured independently per channel and can trigger interrupts or drive GPOs for wake-up or pre-activation functions.
CY8CMBR3116-LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-UFQFN Exposed Pad
- Series:
- CAPSENSE™ Express™ SmartSense™
- Packaging:
- Tape & Reel (TR)
- 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-LQXIT FAQ
1.How can I place an order for CY8CMBR3116-LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8CMBR3116-LQXIT 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-LQXIT reliable?
The price and inventory of CY8CMBR3116-LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8CMBR3116-LQXIT is usually 5 days.
3.What payment methods are accepted for CY8CMBR3116-LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8CMBR3116-LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8CMBR3116-LQXIT?
CY8CMBR3116-LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8CMBR3116-LQXIT 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-LQXIT?
For technical support, including CY8CMBR3116-LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8CMBR3116-LQXIT requirements.
6.How does Aetrix verify that CY8CMBR3116-LQXIT is sourced from the original manufacturer or authorized distributors?
All CY8CMBR3116-LQXIT 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-LQXIT meets industry standards.
7.What is the process for return or replacement of CY8CMBR3116-LQXIT?
All CY8CMBR3116-LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8CMBR3116-LQXIT, 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-LQXIT part is unused and in its original packaging.
Return procedure for CY8CMBR3116-LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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