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Infineon Technologies CY8CMBR3145-LQXI
- Part No.:
- CY8CMBR3145-LQXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
CY8CMBR3145-LQXI.pdf
- Description:
- IC MCU 32BIT 8KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:970
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Product details
Overview
CY8CMBR3145-LQXI from Infineon Technologies is a capacitive touch controller MCU with 32-bit ARM Cortex-M0 core, 8 KB flash, 2 KB SRAM, and integrated CapSense® analog front-end supporting up to 14 self- or mutual-capacitance sensors in 16-pin QFN package; used in industrial HMI panels and consumer appliance control interfaces.
For engineers reviewing the CY8CMBR3145-LQXI datasheet, CY8CMBR3145-LQXI pinout, CY8CMBR3145-LQXI application, or CY8CMBR3145-LQXI equivalent, key selection criteria include CapSense channel count, operating voltage range (1.71–5.5 V), I²C/SPI interface support, built-in low-power modes, and AEC-Q100 qualification status.
Technical Context
This device integrates a dedicated CapSense sensing engine with hardware-accelerated baseline tracking and noise rejection algorithms, enabling robust touch detection under wet or noisy conditions. It supports both self-capacitance (up to 14 buttons/sliders) and mutual-capacitance (up to 8 channels) configurations with programmable scan resolution (6–16 bits).
The MCU includes a 24 MHz internal IMO clock, configurable watchdog timer, and power management unit supporting Deep Sleep (0.5 µA typical) and Hibernate (100 nA) modes. All GPIOs are 5-V tolerant and support interrupt-on-change functionality for wake-up events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 24 MHz max operation - enables real-time sensor processing without external host intervention. |
| Flash / SRAM | 8 KB flash / 2 KB SRAM - sufficient for CapSense firmware plus custom application logic and calibration data storage. |
| CapSense Channels | 14 self-cap or 8 mutual-cap channels - supports complex touchpads, sliders, and proximity wake-up zones in compact layouts. |
| Supply Voltage | 1.71–5.5 V - allows direct integration with 3.3 V or 5 V system rails without level-shifting. |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended-temperature consumer environments. |
| Interface | I²C (up to 1 MHz) and SPI (up to 12 MHz) - enables flexible host communication with microcontrollers or SoCs. |
| Low-Power Modes | Deep Sleep (0.5 µA), Hibernate (100 nA) - extends battery life in portable or energy-harvested touch interfaces. |
Pinout & Package
16-pin QFN (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad; RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.71–5.5 V rail for core and analog blocks; requires local 100 nF decoupling. |
| GND | Ground reference | Analog and digital ground shared; recommended star-point connection near exposed pad. |
| SCL / SDA | I²C bidirectional bus | Open-drain pins with internal pull-ups; support standard/fast-mode I²C up to 1 MHz. |
| MOSI / MISO / SCLK / SS | SPI interface signals | Full-duplex SPI master/slave capable; SS active-low chip select with glitch filtering. |
| CTP0–CTP13 | Capacitive sense terminals | Configurable as CSD (self-cap) or CSG (mutual-cap) inputs; each supports shield drive and guard ring routing. |
| INT | Interrupt output | Active-low open-drain signal indicating touch event or firmware-triggered alert. |
| RESET | Hardware reset input | Asynchronous active-low reset; internal pull-up ensures reliable startup without external resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CapSense® Engine | Dedicated hardware block offloads sensor scanning and noise filtering from CPU, reducing firmware overhead and improving response consistency. |
| Wet-Finger Tolerance | Supports >1 mm water layer detection via adaptive thresholding and spread-spectrum modulation, validated per IEC 61000-4-6. |
| Shield Drive Capability | Drives adjacent traces or metal bezels at inverted signal phase to cancel parasitic coupling, improving SNR in high-noise enclosures. |
| AEC-Q100 Grade 2 | Qualified for automotive interior applications (−40°C to +105°C ambient), including HVAC controls and center-stack interfaces. |
| Programmable Low-Power Wake | GPIO or CapSense event can wake CPU from Hibernate mode in <10 µs, enabling ultra-low-power always-on touch detection. |
Applications
| Industrial Control Panel | Home Appliance Interface |
|---|---|
Use Scenario: Touch-based operator interface on PLC-mounted HMIs with metal enclosure and EMI exposure. IC Role / Device Role / Timing Role: Standalone touch controller managing 12-button layout and rotary slider, communicating status via I²C to main controller. Use Value: Immunity to conducted noise (tested to IEC 61000-4-4 Level 3) and stable operation across −25°C to +70°C ambient. | Use Scenario: Cooktop control panel with glass overlay, requiring wet-finger and glove operation. IC Role / Device Role / Timing Role: Primary capacitive sensing node handling 8 cooking-zone buttons and 1 linear slider, using mutual-capacitance for high accuracy. Use Value: Reliable detection through 4 mm thick tempered glass and under 2 mm water film, per UL 60730-1 Annex H. |
| Automotive HVAC Control | Medical Device Keypad |
Use Scenario: Climate control panel in passenger cabin with wide temperature cycling and vibration exposure. IC Role / Device Role / Timing Role: AEC-Q100 qualified touch controller managing 10 tactile-free buttons and 1 proximity wake zone. Use Value: Validated operation from −40°C to +105°C junction temperature and resistance to mechanical shock (50 g, 11 ms per ISO 16750-3). | Use Scenario: Disinfectant-resistant bedside monitor keypad requiring sealed, non-mechanical actuation. IC Role / Device Role / Timing Role: Isolated touch interface with ESD-hardened inputs (±15 kV air, ±8 kV contact per IEC 61000-4-2). Use Value: Maintains function after repeated ethanol wipe cycles and meets IEC 60601-1 creepage/clearance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072CBT6 | No integrated CapSense hardware; requires software-based touch library and external RC network - higher BOM cost and longer development time. | Lacks wet-finger tolerance and AEC-Q100 qualification; limited to commercial-temp consumer devices. | Choose when existing STM32 ecosystem reuse outweighs CapSense performance and qualification needs. |
| ATtiny1616-MFR | 8-bit AVR core, no dedicated touch engine; supports only self-capacitance with lower SNR and no shield drive capability. | Not qualified for automotive or medical use; maximum 8 sensors, no mutual-capacitance mode. | Select for cost-sensitive, low-channel-count applications where advanced noise immunity is not required. |
Compared with STM32F072CBT6 and ATtiny1616-MFR, CY8CMBR3145-LQXI delivers hardware-accelerated, production-ready capacitive sensing with automotive-grade reliability and minimal firmware overhead - critical for time-to-market in certified HMI designs.
Availability
CY8CMBR3145-LQXI is available at Aetrix Electronics and suitable for industrial HMI panels, home appliance interfaces, automotive HVAC controls, and medical device keypads requiring stable component supply and long-term lifecycle support.
Supply support for CY8CMBR3145-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 German semiconductor manufacturer specializing in power management, automotive ICs, and embedded security solutions, with global R&D and manufacturing infrastructure.
CY8CMBR3145 belongs to the CapSense® MBR3 family, designed specifically for robust, low-power, single-chip capacitive touch interfaces in safety-critical and harsh-environment applications.
FAQ
What is the maximum number of touch sensors supported by CY8CMBR3145-LQXI?
It supports up to 14 self-capacitance sensors or 8 mutual-capacitance sensors. Configuration is done via CapSense Designer tool; mutual-capacitance mode requires pairing CTP pins as transmitter/receiver sets, limiting total active channels to eight independent sensing nodes.
Does CY8CMBR3145-LQXI require an external crystal?
No. It uses an internal 24 MHz IMO (Internal Main Oscillator) with ±2% accuracy over temperature and voltage, sufficient for CapSense timing and I²C/SPI communication. An external crystal is optional only if tighter clock accuracy (<±0.5%) is needed for specific timing-critical host synchronization.
Can CY8CMBR3145-LQXI operate with a 5 V supply?
Yes. Its VDD range is 1.71–5.5 V, and all GPIOs are 5-V tolerant. When powered at 5 V, the internal LDO regulates core voltage to 1.2 V, maintaining full performance while allowing direct connection to 5 V system buses without level shifters.
Is there factory-programmed firmware on CY8CMBR3145-LQXI?
No. The device ships with blank flash memory. Firmware must be programmed via SWD interface using Infineon's ModusToolbox™ or PSoC Programmer. Pre-certified CapSense configuration files are available but require user-specific tuning for overlay thickness and environmental conditions.
CY8CMBR3145-LQXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN Exposed Pad
- Series:
- CAPSENSE™
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 16MHz
- Connectivity:
- I2C
- Peripherals:
- Brown-out Detect/Reset, Cap Sense, DMA, LVD, POR, PWM, SmartSense, WDT
- Number of I/O:
- 12
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8CMBR3145-LQXI FAQ
1.How can I place an order for CY8CMBR3145-LQXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8CMBR3145-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 CY8CMBR3145-LQXI reliable?
The price and inventory of CY8CMBR3145-LQXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8CMBR3145-LQXI is usually 5 days.
3.What payment methods are accepted for CY8CMBR3145-LQXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8CMBR3145-LQXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8CMBR3145-LQXI?
CY8CMBR3145-LQXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8CMBR3145-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 CY8CMBR3145-LQXI?
For technical support, including CY8CMBR3145-LQXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8CMBR3145-LQXI requirements.
6.How does Aetrix verify that CY8CMBR3145-LQXI is sourced from the original manufacturer or authorized distributors?
All CY8CMBR3145-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 CY8CMBR3145-LQXI meets industry standards.
7.What is the process for return or replacement of CY8CMBR3145-LQXI?
All CY8CMBR3145-LQXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8CMBR3145-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 CY8CMBR3145-LQXI part is unused and in its original packaging.
Return procedure for CY8CMBR3145-LQXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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