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Infineon Technologies CY8C4046LQI-T451
- Part No.:
- CY8C4046LQI-T451
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C4046LQI-T451.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 16UFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:895
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Product details
Overview
CY8C4046LQI-T451 from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller in the PSoC™ 4000T family, featuring fifth-generation CAPSENSE™ with multi-sense converter, 48 MHz CPU, 64 KB flash, and 8 KB SRAM. It delivers ultra-low-power touch HMI with hardware-accelerated "Always-on" capacitive and inductive sensing, supporting up to 16 capacitive electrodes and 6 inductive sensor pairs for wearables and IoT edge devices.
For engineers reviewing the CY8C4046LQI-T451 datasheet, CY8C4046LQI-T451 pinout, CY8C4046LQI-T451 application, or CY8C4046LQI-T451 equivalent, key selection criteria include deep-sleep current (6 µA), ENOB (13.5-bit), SNR (>5:1), liquid-tolerant sensing architecture, and dual SCB blocks supporting reconfigurable I²C/SPI/UART.
Technical Context
The CY8C4046LQI-T451 integrates a dedicated multi-sense converter low-power (MSCLP) block that enables ratio-metric capacitive and flyback inductive sensing concurrently-without CPU intervention-using autonomous channel scanning in Deep Sleep mode. Its two serial communication blocks (SCBs) support runtime-reconfigurable protocols including master/slave I²C, full-duplex SPI, and UART with configurable baud rates and clock sources.
It employs a 48 MHz internal main oscillator (±2%) and 40 kHz low-power oscillator (ILO), feeding two 16-bit TCPWM blocks with quadrature decode, center-aligned PWM, and comparator-triggered kill signals. GPIOs are programmable for sensing, digital I/O, or analog functions, with hardware filters and automatic smart tuning for CAPSENSE™.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ at 48 MHz with single-cycle multiply; enables deterministic real-time control and firmware compatibility with PSoC™ 4000/4000S. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM; supports secure boot, firmware updates, and CAPSENSE™ middleware execution without external memory. |
| Power Modes | Deep Sleep at 6 µA with hardware wake-on-touch; Active touch detection at 200 µA average; enables battery life >1 year in wearable standby. |
| CAPSENSE™ | Fifth-gen multi-sense converter with 13.5-bit ENOB, >5:1 SNR, <100 aF noise floor; provides liquid-tolerant proximity and hover detection without firmware overhead. |
| Sensing Channels | Up to 16 capacitive sensors (self/mutual) + 6 inductive sensor pairs (100 nH–200 µH range); supports sleek bezel-free UIs and metal-over-touch designs. |
| Communication | Two reconfigurable SCBs: one supports I²C/SPI/UART; the other adds master/slave I²C; enables dual-interface sensor fusion and host coexistence. |
| Timing | Two 16-bit TCPWM blocks with quadrature decode, center-aligned PWM, and comparator-triggered kill outputs; suitable for motor control and LED dimming. |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V input; powers all digital logic, CAPSENSE™ blocks, and GPIOs; requires local 100 nF decoupling. |
| VSS | Digital ground | Reference return path for core, peripherals, and sensing circuits; must be connected to low-impedance system ground plane. |
| P0.0–P0.7 | Programmable GPIO | Support capacitive sensing, digital I/O, or analog input; P0.0–P0.3 configurable as CAPSENSE™ CSD channels with shield drive capability. |
| P1.0–P1.7 | Programmable GPIO | Support inductive sensing (flyback excitation/detection), SCB interfaces, or TCPWM outputs; P1.4/P1.5 default I²C SCL/SDA. |
| SWDCLK / SWDIO | Debug interface | Serial Wire Debug pins; enable non-intrusive programming, real-time tracing, and full-chip debugging using standard Arm® tools. |
| XRES | External reset | Active-low asynchronous reset; debounced internally; allows clean system restart without power cycle during CAPSENSE™ firmware updates. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Sensing Engine | Hardware-based MSCLP block performs capacitive/inductive scan, filtering, and threshold detection without CPU wake-up-reducing active time by >90%. |
| Smart Tuning Algorithm | Real-time auto-calibration of sensor baseline, sensitivity, and noise thresholds; eliminates manual tuning across temperature/humidity variations. |
| Class-B Firmware Library | Pre-certified functional safety library supporting IEC 61508 SIL2 and UL 60730 compliance; reduces HMI certification effort by >6 months. |
| Reconfigurable SCBs | Runtime protocol switching between I²C, SPI, and UART on same pins-enables flexible sensor hub integration without PCB redesign. |
| Low-Temp-Drift Clock | Internal IMO (±2%) and ILO (40 kHz) with temperature-compensated stability; ensures consistent timing for PWM, sensing, and comms across –40°C to +85°C. |
Applications
| Wearable Fitness Tracker | Smart Home Touch Panel |
|---|---|
Use Scenario: Buttonless wristband with gesture-enabled navigation and sweat-resistant touch controls. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing BLE connectivity via SCB, and driving OLED display timing with TCPWM. Use Value: 6 µA Deep Sleep extends battery life to 14 months; liquid-tolerant sensing maintains reliability during exercise-induced perspiration. |
Use Scenario: Wall-mounted kitchen control panel with stainless-steel overlay and proximity wake-up. IC Role / Device Role / Timing Role: HMI controller handling mutual-capacitance touch, inductive metal-detection, and I²C communication with main system MCU. Use Value: Multi-sense converter enables simultaneous touch + hover detection through 2 mm metal; eliminates false triggers from condensation or grease. |
| Industrial Control Keypad | Wireless Earbud Case |
Use Scenario: Dust- and chemical-resistant operator interface for factory HMIs with glove operation support. IC Role / Device Role / Timing Role: Dedicated touch controller interfacing with PLC via UART, managing backlight PWM and status LEDs via TCPWM. Use Value: 13.5-bit ENOB and hardware filtering ensure reliable detection through 1.5 mm polycarbonate overlay-even under EMI-heavy motor drive environments. |
Use Scenario: Charging case with lid-open detection, battery level sensing, and wireless charging status indication. IC Role / Device Role / Timing Role: System manager monitoring hall-effect lid switch, measuring battery voltage via SAR ADC, and controlling RGB LED via PWM. Use Value: Integrated CAPSENSE™ replaces mechanical switches; ultra-low 200 µA active sensing enables >2000 open/close cycles per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power HMI controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4045LQI-S412 | Same PSoC™ 4000T core but 32 KB flash, 4 KB SRAM, no inductive sensing support; lacks MSCLP block. | Limited to capacitive-only HMI; unsuitable for metal-over-touch or liquid-level sensing use cases. | Select when cost-sensitive designs require only basic touch and no inductive channel expansion. |
| STM32G031K8T6 | Arm® Cortex®-M0+, 64 KB flash, but no integrated CAPSENSE™; requires external touch controller or custom firmware for sensing. | Higher BOM cost and PCB area due to added components; no hardware-accelerated "Always-on" sensing engine. | Choose if existing STM32 toolchain familiarity outweighs CAPSENSE™ integration benefits and power savings. |
Compared with CY8C4045LQI-S412 and STM32G031K8T6, CY8C4046LQI-T451 uniquely delivers certified, hardware-accelerated multi-sense HMI in a single chip-reducing system latency by 3×, eliminating external sensing ICs, and enabling sub-6 µA standby operation unattainable with discrete solutions.
Availability
CY8C4046LQI-T451 is available at Aetrix Electronics and suitable for wearable electronics, smart home interfaces, industrial HMIs, and wireless earbud accessories requiring stable component supply and long-term lifecycle assurance.
Supply support for CY8C4046LQI-T451 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 MCUs, and human-machine interface solutions with global manufacturing and R&D infrastructure.
CY8C4046LQI-T451 belongs to the PSoC™ 4000T product line-designed specifically for next-generation ultra-low-power touch and multi-sense HMI in space-constrained, battery-operated IoT endpoints.
FAQ
Does CY8C4046LQI-T451 support JTAG debugging?
No-CY8C4046LQI-T451 uses Arm® Serial Wire Debug (SWD) exclusively. It features SWDCLK and SWDIO pins compliant with ARM CoreSight standards, enabling full programming, real-time tracing, and breakpoint debugging via MiniProg4 or third-party SWD probes. JTAG is not implemented on this device.
What is the maximum operating temperature for reliable CAPSENSE™ performance?
CY8C4046LQI-T451 maintains full CAPSENSE™ functionality-including 13.5-bit ENOB and >5:1 SNR-across its rated industrial temperature range of –40°C to +85°C. The internal IMO and ILO oscillators are temperature-compensated, and smart tuning automatically adjusts baselines to preserve sensitivity and noise immunity at temperature extremes.
Can the bootloader be updated or replaced after factory programming?
Yes-the factory-installed I²C bootloader (occupying 0x00000000–0x00003200) can be overwritten using SWD/JTAG programming. ModusToolbox™ DFU middleware supports field updates via I²C, and custom bootloaders may be developed using the PDL. Bootloader metadata (256 bytes) remains reserved for device identification and image validation.
How many GPIOs support both capacitive and inductive sensing simultaneously?
Up to eight GPIOs (P0.0–P0.3 and P1.0–P1.3) are configurable for either capacitive sensing (CSD) or inductive sensing (IDAC-driven flyback), but not simultaneously on the same pin. The MSCLP block timeslices shared resources-capacitive and inductive scans occur sequentially under hardware control, ensuring signal integrity and noise isolation.
CY8C4046LQI-T451 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN
- 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:
- 11
- 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-T451 FAQ
1.How can I place an order for CY8C4046LQI-T451 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4046LQI-T451 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-T451 reliable?
The price and inventory of CY8C4046LQI-T451 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4046LQI-T451 is usually 5 days.
3.What payment methods are accepted for CY8C4046LQI-T451?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4046LQI-T451 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4046LQI-T451?
CY8C4046LQI-T451 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4046LQI-T451 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-T451?
For technical support, including CY8C4046LQI-T451 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4046LQI-T451 requirements.
6.How does Aetrix verify that CY8C4046LQI-T451 is sourced from the original manufacturer or authorized distributors?
All CY8C4046LQI-T451 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-T451 meets industry standards.
7.What is the process for return or replacement of CY8C4046LQI-T451?
All CY8C4046LQI-T451 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4046LQI-T451, 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-T451 part is unused and in its original packaging.
Return procedure for CY8C4046LQI-T451:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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