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Infineon Technologies CY8C4046LQI-T412
- Part No.:
- CY8C4046LQI-T412
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY8C4046LQI-T412.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 24UFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:964
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Product details
Overview
CY8C4046LQI-T412 from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with fifth-generation CAPSENSE™ and multi-sense HMI technology, integrated 48-MHz CPU, 64 KB flash, 8 KB SRAM, and hardware-accelerated capacitive/inductive sensing. It delivers ultra-low-power touch operation (6 µA Deep Sleep with always-on wake-on-touch) and supports up to 16 capacitive and 6 inductive sensors for robust human-machine interfaces in wearables and IoT edge devices.
For engineers reviewing the CY8C4046LQI-T412 datasheet, CY8C4046LQI-T412 pinout, CY8C4046LQI-T412 application, or CY8C4046LQI-T412 equivalent, key selection criteria include its 1.71–5.5 V operating range, autonomous multi-sense scanning capability, 13.5-bit ENOB resolution, I²C/SPI/UART reconfigurable SCBs, and WLCSP-25 package compatibility with ModusToolbox™ DFU middleware support.
Technical Context
The CY8C4046LQI-T412 implements a dedicated multi-sense converter (MSCLP) with ratio-metric architecture for simultaneous capacitive and inductive sensing, enabling liquid-tolerant HMI operation without CPU intervention. Its two runtime-reconfigurable serial communication blocks (SCBs) support master/slave I²C, SPI, or UART on shared pins, while dual 16-bit TCPWM blocks provide center-aligned PWM, quadrature decoding, and comparator-triggered kill signals.
Power management includes deep-sleep mode with hardware-based wake-on-touch detection and active sensing at 200 µA average current. The device integrates a ±2% IMO and 40 kHz ILO, supports up to 21 GPIOs with configurable analog/digital/sensing roles, and uses SWD for secure debug with flash protection and permanent interface disable capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz, single-cycle multiply - enables real-time sensor processing and deterministic interrupt latency |
| Memory | 64 KB flash with read accelerator + 8 KB SRAM - sufficient for CAPSENSE™ middleware, firmware, and application code in compact wearable designs |
| Sensing Capability | Fifth-gen CAPSENSE™ with MSCLP, 13.5-bit ENOB, >5:1 SNR - delivers reliable proximity/touch detection under wet conditions and EMI-rich environments |
| Power Modes | Deep Sleep @ 6 µA with hardware wake-on-touch; Active @ 200 µA avg - extends battery life in hearables and coin-cell-powered IoT nodes |
| Package | 25-pin WLCSP, 0.35 mm pitch - enables ultra-compact PCB layout for space-constrained wearables and smart accessories |
| Communication | Two reconfigurable SCBs supporting I²C/SPI/UART - allows flexible peripheral interfacing without additional level-shifting or protocol converters |
| Clock Sources | ±2% IMO + 40 kHz ILO - eliminates external crystal requirement for low-cost, low-power timing in portable applications |
Pinout & Package
Package: 25-pin Wafer-Level Chip Scale Package (WLCSP), 0.35 mm pitch, 2.13 mm × 2.13 mm footprint, solder-ball mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 1.71–5.5 V; powers digital core, analog subsystem, and CAPSENSE™ blocks |
| VSS | Ground reference | Common return path for all internal circuits; requires low-impedance PCB connection |
| P0.0–P0.7 | Programmable GPIO / CAPSENSE™ electrode | Configurable as digital I/O, analog input, or self/mutual-capacitance sensor electrodes |
| P1.0–P1.7 | Programmable GPIO / inductive sensing pair | Support flyback inductive sensing up to 6 channels; each pair drives LC resonator excitation |
| P2.2 / P2.3 | I²C SCL / SDA (bootloader default) | Hardwired to factory-installed I²C bootloader (address 0x0C, 400 kbps); require external pull-ups |
| SWDIO / SWCLK | Serial Wire Debug interface | Enables programming, debugging, and trace via standard Arm® SWD; debug can be permanently disabled in secure firmware |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Multi-Sense Scanning | Hardware-accelerated CAPSENSE™ and inductive sensing without CPU involvement - reduces active time and extends battery life |
| Always-On Touch Detection | Dedicated hardware wake-on-touch in Deep Sleep mode - enables instant UI response with sub-6 µA quiescent current |
| Smart Sensing Algorithm | Automatic hardware tuning of sensor parameters (e.g., IDAC, scan speed) - eliminates manual calibration during production |
| Class-B Firmware Library Support | Pre-certified functional safety routines for IEC 61508/UL 60730 compliance - accelerates certification for industrial and medical HMI |
| Reconfigurable Serial Blocks | Two SCBs independently assignable to I²C/SPI/UART protocols - simplifies BOM consolidation and design reuse across product variants |
Applications
| Smart Wearable Watch | Water-Resistant Smart Button |
|---|---|
Use Scenario: Round wrist-worn device with curved capacitive bezel and gesture-enabled crown control. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing BLE connectivity, and driving OLED display timing via TCPWM. Use Value: 13.5-bit ENOB and liquid-tolerant sensing enable reliable touch-through-glass operation even with sweat or rain exposure. | Use Scenario: Submersible IoT activation button for pool equipment or outdoor lighting controls. IC Role / Device Role / Timing Role: Standalone HMI controller performing inductive metal-detection and capacitive wake-up, with I²C communication to host MCU. Use Value: Dual-mode sensing provides fail-safe actuation: inductive detects metal housing presence; capacitive confirms user press - both immune to water ingress. |
| Hearable Earbud Touch Panel | Industrial Control Knob |
Use Scenario: Compact earbud with ear-tip proximity detection and tap-to-control surface. IC Role / Device Role / Timing Role: Ultra-low-power CAPSENSE™ node handling proximity, hover, and tap gestures; communicates results over I²C to main audio SoC. Use Value: 6 µA Deep Sleep with hardware wake-on-proximity eliminates continuous polling, extending 200 mAh battery to >7 days standby. | Use Scenario: Sealed rotary control for factory HMIs exposed to coolant mist and metal shavings. IC Role / Device Role / Timing Role: Dedicated sensing MCU implementing inductive position tracking and capacitive button confirmation on same PCB. Use Value: Flyback inductive sensing (40 kHz–5.7 MHz excitation) rejects EMI from nearby VFDs and motors while maintaining <1° angular resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller-based HMI applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4045LQI-T412 | Same package and core, but 32 KB flash / 4 KB SRAM; no inductive sensing support | Limited to pure capacitive-only HMI; unsuitable for multi-sense or metal-detection use cases | Select when cost-sensitive designs require only basic touch and lack space/power budget for full multi-sense capability |
| CY8C4047LQI-T412 | Same feature set plus 12-bit SAR ADC (1 Msps), extra TCPWM block, and enhanced GPIO drive strength | Supports analog sensor fusion (e.g., temperature-compensated touch) and higher-current LED drivers | Select when integrating analog front-end functions or driving higher-power indicators without external components |
Compared with CY8C4045LQI-T412, the CY8C4046LQI-T412 adds inductive sensing and doubles memory; versus CY8C4047LQI-T412, it trades ADC and extra peripherals for lower unit cost and identical footprint-ideal for volume touch-only HMI where analog sensing isn't required.
Availability
CY8C4046LQI-T412 is available at Aetrix Electronics and suitable for smart wearables, water-resistant IoT controls, and hearable touch interfaces requiring stable component supply, long-term lifecycle assurance, and qualified WLCSP packaging.
Supply support for CY8C4046LQI-T412 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, sensing, and microcontroller solutions for automotive, industrial, and IoT markets.
The PSoC™ 4000T product line is designed specifically for ultra-low-power human-machine interface applications, integrating fifth-generation CAPSENSE™ and multi-sense technology to replace mechanical buttons and enable sleek, sealed, liquid-tolerant user interfaces.
FAQ
Does CY8C4046LQI-T412 support in-system programming via I²C?
Yes, the device ships with a factory-installed I²C bootloader configured for address 0x0C, 400 kbps data rate, and SCL/SDA on P2.2/P2.3. External pull-up resistors are required, and the bootloader occupies the bottom 12.5 KB of flash. It is compatible with ModusToolbox™ DFU middleware and supports .cyacd2 firmware updates.
What is the maximum number of electrodes supported in mutual-capacitance mode?
The CY8C4046LQI-T412 supports up to 16 electrodes in mutual-capacitance configuration, enabling high-resolution touchpad or slider implementations. Electrode count is constrained by available GPIOs and routing; full 16-electrode operation requires proper PCB layout with shielded traces and guard rings to maintain >5:1 SNR.
Can the multi-sense converter operate independently of the CPU during Deep Sleep?
Yes, the multi-sense converter (MSCLP) performs autonomous channel scanning and wake-on-touch detection entirely in hardware during Deep Sleep mode. No CPU clock or firmware execution is required, enabling true 6 µA quiescent current while maintaining responsive HMI functionality.
Is SWD debug permanently enabled, and can it be secured against unauthorized access?
SWD debug is enabled by default but can be disabled in firmware. Once disabled, re-enabling requires full chip erase (if not erase-protected), clearing flash protection, and reprogramming. All debug and programming interfaces can also be permanently disabled via device security features to prevent phishing attacks from malicious firmware.
CY8C4046LQI-T412 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-UFQFN Exposed Pad
- Series:
- PSOC™ 4000T
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- I2C, Microwire, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, POR, PWM, WDT
- Number of I/O:
- 19
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4046LQI-T412 FAQ
1.How can I place an order for CY8C4046LQI-T412 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4046LQI-T412 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 CY8C4046LQI-T412 reliable?
The price and inventory of CY8C4046LQI-T412 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4046LQI-T412 is usually 5 days.
3.What payment methods are accepted for CY8C4046LQI-T412?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4046LQI-T412 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4046LQI-T412?
CY8C4046LQI-T412 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4046LQI-T412 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 CY8C4046LQI-T412?
For technical support, including CY8C4046LQI-T412 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4046LQI-T412 requirements.
6.How does Aetrix verify that CY8C4046LQI-T412 is sourced from the original manufacturer or authorized distributors?
All CY8C4046LQI-T412 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 CY8C4046LQI-T412 meets industry standards.
7.What is the process for return or replacement of CY8C4046LQI-T412?
All CY8C4046LQI-T412 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4046LQI-T412, 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 CY8C4046LQI-T412 part is unused and in its original packaging.
Return procedure for CY8C4046LQI-T412:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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