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Infineon Technologies CY8C4046LQI-T452
- Part No.:
- CY8C4046LQI-T452
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY8C4046LQI-T452.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 24UFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:770
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Product details
Overview
CY8C4046LQI-T452 from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with fifth-generation CAPSENSE™ and multi-sense HMI technology, 48 MHz CPU clock, 64 KB flash, 8 KB SRAM, and ultra-low-power Deep Sleep mode (6 µA) with hardware wake-on-touch. It integrates capacitive and inductive sensing for liquid-tolerant touch interfaces in wearables and IoT edge devices.
For engineers reviewing the CY8C4046LQI-T452 datasheet, CY8C4046LQI-T452 pinout, CY8C4046LQI-T452 application, or CY8C4046LQI-T452 equivalent, key selection criteria include its 16-sensor capacitive + 6-channel inductive sensing capability, 1.71–5.5 V operating range, autonomous hardware-based touch scanning, and QFN-24 package compatibility with PSOC™ 4000T software ecosystem.
Technical Context
The CY8C4046LQI-T452 implements a dedicated multi-sense converter (MSCLP) with ratio-metric architecture enabling simultaneous capacitive and inductive sensing without CPU intervention. Its hardware-accelerated CAPSENSE™ engine delivers >5:1 SNR and supports self/mutual capacitance modes with automatic smart tuning.
It features two reconfigurable serial communication blocks (SCBs) supporting I²C/SPI/UART, dual 16-bit TCPWM modules with quadrature decode and kill-signal triggering, and dual oscillators (48 MHz IMO ±2%, 40 kHz ILO) for precise low-power timing control in always-on HMI applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz - enables real-time sensor fusion and firmware execution within tight power budgets |
| Flash / SRAM | 64 KB flash with read accelerator / 8 KB SRAM - sufficient for CAPSENSE™ middleware, DFU stack, and application logic |
| Operating Voltage | 1.71 V to 5.5 V - supports single-supply operation across coin-cell (1.8 V), Li-ion (3.3–3.7 V), and USB-powered (5 V) systems |
| Deep Sleep Current | 6 µA with "Always-on" touch detection - enables multi-year battery life in wearable hearables with wake-on-touch |
| Sensing Channels | Up to 16 capacitive electrodes + 6 inductive sensor pairs - allows complex UIs (e.g., scroll wheels, proximity + button combos) on one chip |
| ENOB / SNR | 13.5-bit effective resolution / >5:1 signal-to-noise ratio - ensures reliable touch detection under moisture, gloves, or EMI noise |
| GPIO Count | 21 programmable pins - supports mixed-signal routing for analog sensing, digital I/O, and communication interfaces |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), wettable flank, RoHS-compliant, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | Primary power input (1.71–5.5 V); must be decoupled locally for CAPSENSE™ noise immunity |
| GND | Ground reference | Common return for analog/digital domains; separate AGND/DGND not required due to integrated design |
| P0.0–P0.7 | Programmable GPIO | Support capacitive sensing (CSD), inductive sensing (IDAC), or digital I/O; configurable as analog inputs |
| P1.0–P1.7 | Programmable GPIO | Same functionality as P0.x; includes dedicated SCB0/SCB1 pins for I²C/SPI/UART |
| P2.0–P2.7 | Programmable GPIO | Includes SWDIO/SWCLK debug pins; P2.2/P2.3 default I²C bootloader interface (address 0x0C) |
| XTAL_IN/XTAL_OUT | External crystal interface | Optional 1–32 MHz crystal for high-accuracy timing; not required for CAPSENSE™-centric designs using IMO/ILO |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous CAPSENSE™ Engine | Hardware-based electrode scanning in Deep Sleep mode eliminates CPU wakeups, reducing average active current to 200 µA |
| Fifth-Gen Multi-Sense Converter | Single-chip support for both capacitive and inductive sensing with shared signal chain, enabling robust liquid-tolerant UIs |
| Smart Sensing Algorithm | On-the-fly hardware tuning of IDAC, integration time, and baseline compensation adapts to environmental drift |
| Class-B Firmware Library | Pre-certified functional safety routines for IEC 61508 SIL2 and UL 60730 compliance in consumer HMI applications |
| ModusToolbox™ Integration | Out-of-box support for CAPSENSE™ Tuner GUI, DFU middleware, and BSPs - cuts HMI prototyping time by ≥70% |
Applications
| Smart Wearable Touchband | Industrial Control Panel |
|---|---|
Use Scenario: A wrist-worn fitness tracker with waterproof capacitive buttons and gesture-enabled scroll wheel. IC Role / Device Role / Timing Role: Primary MCU and HMI controller; manages sensor data acquisition, touch event processing, and BLE communication timing. Use Value: 6 µA Deep Sleep + hardware wake-on-touch extends battery life to 18 months on a 120 mAh cell while maintaining IP68 liquid tolerance. | Use Scenario: A factory HMIs panel with metal-over-glass buttons and proximity-triggered menu navigation. IC Role / Device Role / Timing Role: Dedicated HMI processor handling all touch/inductive input; isolates UI latency from main PLC control loop. Use Value: Flyback inductive sensing (40 kHz–5.7 MHz excitation) detects finger presence through 3 mm stainless steel overlay without false triggers. |
| Wireless Earbud Case | Smart Home Appliance Interface |
Use Scenario: Charging case with lid-open detection, battery status LEDs, and tap-to-pair capacitive pads. IC Role / Device Role / Timing Role: System controller managing lid switch, battery gauge ADC, LED PWM, and touch command decoding. Use Value: Single-chip integration replaces 3 discrete ICs (touch controller, LED driver, voltage monitor), reducing BOM cost by 32%. | Use Scenario: Refrigerator door panel with hidden capacitive keys and hover-sensing for child lock activation. IC Role / Device Role / Timing Role: CAPSENSE™ subsystem handles all user interaction; CPU remains in Deep Sleep until valid gesture detected. Use Value: 13.5-bit ENOB and hardware filters reject EMI from compressor motor, ensuring zero false triggers during operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power HMI microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4045LQI-T432 | Same core, 32 KB flash / 4 KB SRAM, identical CAPSENSE™ engine and pinout | Limited firmware complexity; suitable only for basic touch-only (no inductive) or minimal BLE stack usage | Select when BOM cost sensitivity outweighs need for future firmware scalability or multi-sensor expansion |
| STM32G031K8T6 | No integrated CAPSENSE™; requires external touch controller or software-based capacitive sensing with higher CPU load and lower SNR | Requires additional components and PCB area for touch functionality; no inductive sensing capability | Select only if existing STM32 toolchain familiarity and non-touch-centric system architecture dominate design priorities |
Compared with CY8C4045LQI-T432, the CY8C4046LQI-T452 provides 2× flash/SRAM headroom for secure OTA updates and richer UI logic; versus STM32G031K8T6, it eliminates external touch ICs, reduces system-level power by 40% in always-on mode, and adds inductive sensing for metal-over-glass interfaces.
Availability
CY8C4046LQI-T452 is available at Aetrix Electronics and suitable for smart wearables, industrial HMIs, wireless earbud accessories, and smart home appliance interfaces requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4046LQI-T452 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 leader specializing in power management, sensing, and microcontroller solutions for industrial, automotive, and IoT markets, with over 30 years of embedded systems expertise.
The PSOC™ 4000T product line was designed specifically to deliver ultra-low-power, liquid-tolerant human-machine interfaces for next-generation wearables and edge-connected devices-integrating sensing, processing, and communication in a single scalable MCU platform.
FAQ
Does CY8C4046LQI-T452 support in-circuit debugging via SWD?
Yes. The device includes full Arm® Serial Wire Debug (SWD) support with SWDIO and SWCLK pins mapped to P2.4 and P2.5. Debug circuits are enabled by default and can be disabled in firmware; re-enabling requires full flash erase if protection is active. ModusToolbox™ IDE and MiniProg4 provide seamless programming and real-time trace.
What is the maximum number of electrodes supported in mutual-capacitance mode?
The CY8C4046LQI-T452 supports up to 16 electrodes in mutual-capacitance configuration, enabling true multi-touch gestures (e.g., pinch-to-zoom, swipe) with hardware-accelerated scan and baseline tracking. Electrode count is limited by physical pin count and routing constraints-not firmware or memory.
Can the factory-installed I²C bootloader be replaced or disabled?
Yes. The pre-programmed I²C bootloader (occupying 12.5 KB flash, address 0x00000000–0x00003200) can be overwritten via JTAG or SWD. It can also be disabled permanently by setting appropriate flash protection bits, though doing so removes DFU capability unless a custom bootloader is implemented.
Is external crystal required for CAPSENSE™ operation?
No. Fifth-generation CAPSENSE™ uses the internal 48 MHz IMO and 40 kHz ILO for all sensing operations. An external crystal is optional and only needed for applications requiring <±50 ppm timing accuracy beyond what the IMO provides-such as synchronous audio streaming or precision UART baud rates.
CY8C4046LQI-T452 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-T452 FAQ
1.How can I place an order for CY8C4046LQI-T452 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4046LQI-T452 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-T452 reliable?
The price and inventory of CY8C4046LQI-T452 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4046LQI-T452 is usually 5 days.
3.What payment methods are accepted for CY8C4046LQI-T452?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4046LQI-T452 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4046LQI-T452?
CY8C4046LQI-T452 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4046LQI-T452 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-T452?
For technical support, including CY8C4046LQI-T452 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4046LQI-T452 requirements.
6.How does Aetrix verify that CY8C4046LQI-T452 is sourced from the original manufacturer or authorized distributors?
All CY8C4046LQI-T452 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-T452 meets industry standards.
7.What is the process for return or replacement of CY8C4046LQI-T452?
All CY8C4046LQI-T452 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4046LQI-T452, 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-T452 part is unused and in its original packaging.
Return procedure for CY8C4046LQI-T452:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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