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Infineon Technologies CY8CMBR3110-SX2I
- Part No.:
- CY8CMBR3110-SX2I
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8CMBR3110-SX2I.pdf
- Description:
- IC CAP SENSE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:701
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Product details
Overview
CY8CMBR3110-SX2I from Infineon Technologies (formerly Cypress Semiconductor) is a register-configurable CapSense Express™ capacitive touch controller supporting 10 sensing inputs, SmartSense auto-tuning, and I²C interface. It delivers >100:1 SNR, 0.1 pF sensitivity, liquid-tolerant operation, and operates from 1.71 V to 5.5 V across –40 °C to +85 °C. Used in industrial HMI panels, appliance control interfaces, and consumer electronics requiring robust, no-firmware touch sensing.
For engineers reviewing the CY8CMBR3110-SX2I datasheet, CY8CMBR3110-SX2I pinout, CY8CMBR3110-SX2I application, or CY8CMBR3110-SX2I equivalent, key selection criteria include sensing input count (10), SmartSense auto-tuning capability, I²C slave support up to 400 kHz, deep-sleep current (22 µA per sensor at 120-ms refresh), and QFN-24 package compatibility with overlay thickness up to 15 mm (glass).
Technical Context
The CY8CMBR3110-SX2I implements Capacitive Sigma Delta PLUS (CSD PLUS) sensing architecture with dedicated analog front-end channels and digital signal processing optimized for noise immunity. It uses hardware-based SmartSense auto-tuning to dynamically adjust baseline, threshold, and sensitivity without host intervention.
It integrates flanking sensor suppression (FSS), system diagnostics for CMOD/CP faults, and configurable GPOs for LED/buzzer feedback. Communication occurs exclusively via I²C slave interface with wake-on-address-match and no clock stretching - enabling low-latency, deterministic host interaction in resource-constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Inputs | 10 independent capacitive sensing channels - supports buttons, sliders, and proximity sensors on single device. |
| SNR | >100:1 - ensures reliable touch detection under conducted/radiated EMI, including AC line noise and RF interference. |
| Sensitivity | 0.1 pF minimum detectable change - enables thin overlay designs and high-resolution slider position tracking. |
| Supply Voltage | 1.71 V to 5.5 V - compatible with both 1.8 V and 3.3 V/5 V host systems without level-shifting. |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and extended-temperature consumer applications. |
| I²C Speed | Up to 400 kHz - supports fast configuration updates and real-time sensor status polling without bus contention. |
| Deep Sleep Current | 22 µA per active sensor at 120-ms refresh - enables battery-powered UIs with multi-week operational life. |
Pinout & Package
Package: 24-pin QFN (4 × 4 × 0.6 mm), exposed thermal pad, RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.71–5.5 V supply rail; decoupling capacitor required near pin. |
| GND | Ground reference | Analog/digital common ground; connects to thermal pad for thermal dissipation. |
| SCL | I²C clock input | Open-drain input; requires external pull-up to VDD for proper I²C timing compliance. |
| SDA | I²C data bidirectional | Open-drain bidirectional line; shares same pull-up as SCL. |
| INT | Interrupt output | Active-low open-drain attention line signaling sensor state change to host MCU. |
| AXRES | Reset input | Asynchronous reset; low pulse ≥1 µs forces full internal reset and reinitialization. |
| SPO0–SPO9 | Sensor input pins | Capacitive sensing electrodes; each connects directly to PCB trace or overlay electrode. |
| GPO0–GPO7 | General-purpose outputs | High-sink current (20 mA typical) outputs for driving LEDs or buzzer transducers. |
| AVOUT | Analog voltage output | Configurable 0–VDD analog output proportional to raw sensor delta capacitance value. |
| CMOD | Modulation capacitor terminal | Connects external 2.2 nF ±10 % ceramic capacitor; critical for CSD PLUS oscillator stability. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-tuning | Real-time baseline and threshold adaptation eliminates manual tuning during production ramp and environmental drift. |
| Liquid Tolerance | Detects intentional touches through mist, droplets, or streaming water by rejecting false triggers using dynamic CP compensation. |
| Flanking Sensor Suppression (FSS) | Hardware-accelerated adjacent-button crosstalk rejection - enables <2 mm button pitch without firmware overhead. |
| System Diagnostics | On-chip detection of CMOD fault, out-of-range CP (5–45 pF), and sensor short - reduces validation time and field failure root cause analysis. |
| LED Brightness Control | 8-bit programmable PWM on all 8 GPOs - enables uniform visual feedback across diverse LED forward voltages and brightness requirements. |
Applications
| Home Appliance Control Panel | Industrial HMI Terminal |
|---|---|
Use Scenario: Touch-enabled oven, washer, or HVAC control panel with glass overlay and IPX4-rated enclosure. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing 10 buttons/sliders, providing interrupt-driven status to host MCU via I²C. Use Value: Eliminates mechanical switch wear, supports 15 mm glass overlay, and maintains reliability under condensation and cleaning cycles. | Use Scenario: Ruggedized factory floor operator interface with metal bezel and ambient EMI exposure. IC Role / Device Role / Timing Role: Noise-immune touch sensor hub handling proximity wake-up and tactile feedback via GPO-driven LEDs/buzzer. Use Value: >100:1 SNR prevents false triggers from variable-frequency drives and welding equipment nearby. |
| Consumer Audio Device | Medical Equipment Interface |
Use Scenario: Premium wireless speaker with gesture-capable top-panel slider and mute button. IC Role / Device Role / Timing Role: Low-power touch manager operating in deep sleep between user interactions, waking host only on valid touch. Use Value: 22 µA/sensor average current extends battery life while maintaining sub-100 ms response latency. | Use Scenario: Sterilizable patient monitor front panel requiring glove-compatible touch and splash resistance. IC Role / Device Role / Timing Role: Liquid-tolerant sensor controller validating electrode integrity and rejecting false triggers from saline residue or cleaning agents. Use Value: Built-in CP diagnostics and FSS ensure consistent performance after repeated alcohol wipe-downs. |
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 SmartSense; fixed threshold algorithm; 2.7–5.5 V supply. | Lacks auto-tuning and liquid tolerance features; requires manual calibration per unit during production. | Select when cost sensitivity outweighs development time savings and environmental robustness requirements. |
| STMFTL1A | 16-channel STM32-based touch controller; firmware-dependent; requires ARM Cortex-M0+ integration. | Demands host MCU resources and firmware development; no hardware-based diagnostics or FSS acceleration. | Select only if existing STM32 ecosystem and custom algorithm control are mandatory design constraints. |
Compared with AT42QT2120-MAHR and STMFTL1A, the CY8CMBR3110-SX2I provides autonomous SmartSense tuning, integrated liquid tolerance, and hardware-accelerated FSS - reducing BOM count, qualification effort, and production yield risk in volume HMI deployments.
Availability
CY8CMBR3110-SX2I is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, and medical equipment interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for CY8CMBR3110-SX2I 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 markets.
The CY8CMBR3xxx family was originally developed by Cypress Semiconductor and continues under Infineon's portfolio to deliver turnkey, register-configurable capacitive touch controllers targeting rapid HMI development with zero firmware investment.
FAQ
What is the function of the AXRES pin on CY8CMBR3110-SX2I?
The AXRES pin is an asynchronous reset input that triggers a full internal hardware reset when pulled low for ≥1 µs. It resets all registers to default values, clears sensor baselines, and restarts the SmartSense auto-tuning process. Unlike power-on reset, AXRES does not require power cycling and is used for recovery from abnormal sensor states or host-initiated reinitialization.
Does CY8CMBR3110-SX2I support proximity sensing with a single electrode?
Yes - the CY8CMBR3110-SX2I supports self-capacitance proximity sensing using any of its 10 SPO pins as a single-electrode configuration. It achieves up to 50 mm detection range with optimized electrode size and layout, and uses SmartSense to maintain stable baseline against environmental drift without recalibration.
How is liquid tolerance implemented in CY8CMBR3110-SX2I?
Liquid tolerance is achieved through adaptive baseline tracking, dynamic CP compensation, and dual-threshold detection logic. When water bridges electrodes, the device distinguishes between slow parasitic capacitance shifts (liquid) and fast delta-C changes (touch) - suppressing false triggers while preserving true touch response, validated per IEC 60529 IPX4 test conditions.
Can CY8CMBR3110-SX2I drive standard 20 mA LEDs directly?
Yes - all eight GPO pins support 20 mA sink current at VDD = 3.3 V with ≤0.4 V saturation voltage. Each GPO provides 8-bit PWM brightness control and can drive common-cathode LEDs without external drivers. For higher-current or high-voltage LEDs, external MOSFET buffering is recommended.
CY8CMBR3110-SX2I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™ SmartSense™
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Buttons
- Proximity Detection:
- Yes
- Number of Inputs:
- Up to 10
- LED Driver Channels:
- Up to 5
- 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:
- 16-SOIC
CY8CMBR3110-SX2I FAQ
1.How can I place an order for CY8CMBR3110-SX2I through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8CMBR3110-SX2I 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 CY8CMBR3110-SX2I reliable?
The price and inventory of CY8CMBR3110-SX2I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8CMBR3110-SX2I is usually 5 days.
3.What payment methods are accepted for CY8CMBR3110-SX2I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8CMBR3110-SX2I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8CMBR3110-SX2I?
CY8CMBR3110-SX2I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8CMBR3110-SX2I 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 CY8CMBR3110-SX2I?
For technical support, including CY8CMBR3110-SX2I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8CMBR3110-SX2I requirements.
6.How does Aetrix verify that CY8CMBR3110-SX2I is sourced from the original manufacturer or authorized distributors?
All CY8CMBR3110-SX2I 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 CY8CMBR3110-SX2I meets industry standards.
7.What is the process for return or replacement of CY8CMBR3110-SX2I?
All CY8CMBR3110-SX2I units undergo pre-shipment inspection (PSI). If there is an issue with CY8CMBR3110-SX2I, 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 CY8CMBR3110-SX2I part is unused and in its original packaging.
Return procedure for CY8CMBR3110-SX2I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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