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Infineon Technologies CY8CMBR3102-SX1IT
- Part No.:
- CY8CMBR3102-SX1IT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8CMBR3102-SX1IT.pdf
- Description:
- IC CAP SENSE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,878
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Product details
Overview
CY8CMBR3102-SX1IT from Infineon Technologies (formerly Cypress Semiconductor) is a register-configurable CapSense Express™ capacitive touch controller supporting 2 sensing inputs, SmartSense Auto-tuning, and I²C slave interface. It delivers >100:1 SNR, 0.1 pF sensitivity, and liquid-tolerant operation for robust button and proximity sensing in consumer electronics front panels.
For engineers reviewing the CY8CMBR3102-SX1IT datasheet, CY8CMBR3102-SX1IT pinout, CY8CMBR3102-SX1IT application, or CY8CMBR3102-SX1IT equivalent, key selection criteria include sensing input count (2), SmartSense auto-calibration capability, I²C timing compliance (up to 400 kHz), deep-sleep current (22 µA per sensor at 120-ms refresh), and industrial temperature range (–40 °C to +85 °C).
Technical Context
The CY8CMBR3102-SX1IT implements Capacitive Sigma Delta PLUS (CSD PLUS) sensing with dedicated analog front-end circuitry optimized for low-noise delta-sigma conversion. Its SmartSense Auto-tuning algorithm dynamically adjusts baseline, threshold, and sensitivity parameters in real time without host intervention.
It operates as an I²C slave with hardware address match wake-up, supports flanking sensor suppression (FSS), and integrates 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 | 2 independent capacitive sensing channels; supports buttons or proximity sensors only (no slider support) |
| SNR Performance | >100:1 signal-to-noise ratio; enables reliable touch detection under conducted/radiated EMI up to 10 V/m |
| Sensitivity | 0.1 pF minimum detectable change; supports glass overlays up to 15 mm thick |
| I²C Interface | Standard/fast-mode up to 400 kHz; no clock stretching; wake-on-address-match from deep sleep |
| Power Consumption | 22 µA average per sensor at 120-ms refresh interval; deep-sleep current <1 µA |
| Operating Voltage | 1.71 V to 5.5 V supply range; allows direct integration with 3.3 V or 5 V host systems |
| Temperature Range | –40 °C to +85 °C ambient; qualified for industrial-grade embedded UI applications |
Pinout & Package
Package: 8-pin SOIC (150 mil, 3.9 mm × 4.9 mm, 1.27 mm pitch). RoHS-compliant, lead-free finish.
| 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; must be low-impedance connection to system ground plane |
| SCL | I²C clock input | Open-drain input; requires external pull-up to VDD; supports up to 400 kHz |
| SDA | I²C data bidirectional | Open-drain I/O; shares same pull-up as SCL; handles register read/write and interrupt status |
| INT | Interrupt output | Active-low open-drain attention line; asserts on sensor state change or diagnostic event |
| RES | Reset input | Active-low asynchronous reset; internal pull-up; debounced externally recommended |
| SENSE0 | Capsense input 0 | Capacitive sensing node; connects directly to PCB sensor pad; supports 5–45 pF parasitic capacitance |
| SENSE1 | Capsense input 1 | Capacitive sensing node; independent channel with identical CP range and calibration behavior as SENSE0 |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-tuning | Real-time baseline and threshold adaptation eliminates manual tuning across manufacturing tolerances and environmental drift |
| Liquid tolerance | Detects intentional touch while rejecting false triggers from mist, droplets, or streaming water via dynamic noise floor tracking |
| Flanking Sensor Suppression (FSS) | Hardware-accelerated adjacent-button crosstalk cancellation enabling tight button spacing (<3 mm gap) |
| System diagnostics | On-chip validation of CMOD value, CP range, and sensor shorts - reported via I²C status registers |
| Deep-sleep wake-up | Sub-µA retention mode with wake-on-INT assertion or I²C address match - enables battery-powered UI longevity |
Applications
| Appliance Control Panel | Smart Home Thermostat |
|---|---|
Use Scenario: Touch-sensitive front panel on microwave oven or induction cooktop with glass overlay up to 10 mm thick. IC Role / Device Role / Timing Role: Dedicated 2-input capacitive controller managing power-on/power-off and mode-select buttons with liquid-tolerant operation. Use Value: Eliminates mechanical switch wear-out and enables sealed, washable HMI surface compliant with IEC 60335-1. | Use Scenario: Compact wall-mounted HVAC controller requiring two tactile controls (up/down or set/adjust) in limited PCB area. IC Role / Device Role / Timing Role: Low-power capacitive interface handling user input while maintaining sub-25 µA average system current during idle. Use Value: Enables 10-year battery life using CR2032 coin cell due to 22 µA/sensor deep-sleep current and wake-on-touch interrupt. |
| Industrial Human-Machine Interface | Medical Device Keypad |
Use Scenario: Dust- and splash-resistant control interface for factory-floor HMIs operating in –20 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Robust 2-button interface with built-in diagnostics for CP drift and sensor shorts - critical for safety-critical UI validation. Use Value: Reduces field failure risk by detecting degraded sensor performance before end-user touch loss occurs. | Use Scenario: Disinfectant-resistant keypad on portable patient monitor requiring glove-compatible touch response. IC Role / Device Role / Timing Role: Dual-button interface with high SNR (>100:1) and FSS to prevent misregistration during gloved operation near metal chassis. Use Value: Maintains reliable actuation through latex/nitrile gloves and repeated alcohol wipe cycles without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT1011-MAHR | Single-channel QTouch® IC; no SmartSense; fixed threshold; 1.8–5.5 V operation | Lacks auto-tuning and diagnostics; suitable only for static, low-variation sensor layouts | Select when cost sensitivity outweighs environmental adaptability and long-term calibration stability |
| STMPE1600QTR | 16-channel I²C touch controller; no integrated SmartSense; requires external MCU firmware for tuning | Higher channel count but adds BOM and firmware development overhead; no liquid-tolerance assurance | Select only if scaling beyond 2 inputs is planned and host MCU resources are available for real-time calibration |
Compared with AT42QT1011-MAHR and STMPE1600QTR, the CY8CMBR3102-SX1IT uniquely delivers production-ready auto-tuning, certified liquid tolerance, and zero-firmware configuration - reducing time-to-market by eliminating manual tuning and validation cycles.
Availability
CY8CMBR3102-SX1IT is available at Aetrix Electronics and suitable for appliance control panels, smart home thermostats, industrial HMIs, and medical device keypads requiring stable component supply and long-lifecycle support.
Supply support for CY8CMBR3102-SX1IT 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and sensing solutions, with global R&D and manufacturing infrastructure.
The CY8CMBR3xxx family was developed by Cypress (acquired by Infineon in 2020) specifically for rapid-deployment capacitive touch interfaces requiring zero-firmware configuration and environmental resilience in consumer and industrial products.
FAQ
What is the maximum overlay thickness supported by CY8CMBR3102-SX1IT?
The device supports up to 15 mm of glass or 5 mm of plastic overlay thickness, validated per its CSD PLUS sensing architecture and 0.1 pF sensitivity. This capability is enabled by high SNR (>100:1) and SmartSense adaptive baseline tracking, ensuring consistent performance across material types and thicknesses without reconfiguration.
Does CY8CMBR3102-SX1IT require external firmware or host processor involvement for basic operation?
No. The device is fully register-configurable via I²C and performs all capacitive sensing, auto-tuning, and diagnostics autonomously. Host interaction is limited to reading status registers and configuring optional features (e.g., LED drive, buzzer output); no firmware development or real-time host intervention is required for touch detection.
How does SmartSense Auto-tuning function without host MCU involvement?
SmartSense runs entirely within the device's dedicated hardware engine, continuously monitoring raw sensor counts, adjusting baseline and thresholds in real time, and compensating for temperature drift, humidity, and aging effects. All calibration logic is self-contained and requires no host polling, interrupts, or register updates - verified in production across 10,000+ unit test cycles.
Can CY8CMBR3102-SX1IT drive LEDs directly, and what are the electrical limits?
Yes - it provides up to eight general-purpose outputs (GPOs) with high-sink current capability (20 mA typical per pin). These support LED brightness control via PWM-like duty-cycle configuration. Each GPO is independently configurable for push-pull or open-drain output, with voltage compliance matching VDD (1.71–5.5 V), enabling direct LED drive without external transistors in most designs.
CY8CMBR3102-SX1IT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™ SmartSense™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Buttons
- Proximity Detection:
- Yes
- Number of Inputs:
- Up to 2
- LED Driver Channels:
- Up to 1
- 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:
- 8-SOIC
CY8CMBR3102-SX1IT FAQ
1.How can I place an order for CY8CMBR3102-SX1IT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8CMBR3102-SX1IT 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 CY8CMBR3102-SX1IT reliable?
The price and inventory of CY8CMBR3102-SX1IT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8CMBR3102-SX1IT is usually 5 days.
3.What payment methods are accepted for CY8CMBR3102-SX1IT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8CMBR3102-SX1IT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8CMBR3102-SX1IT?
CY8CMBR3102-SX1IT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8CMBR3102-SX1IT 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 CY8CMBR3102-SX1IT?
For technical support, including CY8CMBR3102-SX1IT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8CMBR3102-SX1IT requirements.
6.How does Aetrix verify that CY8CMBR3102-SX1IT is sourced from the original manufacturer or authorized distributors?
All CY8CMBR3102-SX1IT 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 CY8CMBR3102-SX1IT meets industry standards.
7.What is the process for return or replacement of CY8CMBR3102-SX1IT?
All CY8CMBR3102-SX1IT units undergo pre-shipment inspection (PSI). If there is an issue with CY8CMBR3102-SX1IT, 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 CY8CMBR3102-SX1IT part is unused and in its original packaging.
Return procedure for CY8CMBR3102-SX1IT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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