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Infineon Technologies CY8C4045LQI-S412T
- Part No.:
- CY8C4045LQI-S412T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4045LQI-S412T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
CY8C4045LQI-S412T from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 32 KB flash, 4 KB SRAM, integrated CAPSENSE™ capacitive sensing, two SCBs supporting I²C/SPI/UART, and five 16-bit TCPWM blocks. It operates from 1.71 V to 5.5 V and supports Deep Sleep mode at 2.5 µA digital system current. Used in touch-enabled industrial HMI and smart sensor nodes requiring low-power, reconfigurable analog/digital logic.
For engineers reviewing the CY8C4045LQI-S412T datasheet, CY8C4045LQI-S412T pinout, CY8C4045LQI-S412T application, or CY8C4045LQI-S412T equivalent, key selection criteria include CAPSENSE™ SNR (>5:1), programmable analog (IDACs, comparators), TCPWM kill-signal triggering, and SWD debug compatibility with industry-standard tools.
Technical Context
The device implements a single-layer AHB-Lite interconnect linking the Cortex-M0+ core, memory subsystem (32 KB flash + 4 KB SRAM + 8 KB ROM), and peripherals including two low-power comparators active in Deep Sleep, a sigma-delta CAPSENSE™ v2 engine, and dual SCBs with runtime-reconfigurable serial protocols. Clocking includes IMO (±2%), WCO, and ILO for precise timing control across power modes.
Analog functionality is delivered via dedicated capacitance-sensing blocks (10-bit single-slope ADC), two programmable IDACs usable on any GPIO, and continuous-time analog blocks. Digital flexibility comes from programmable logic blocks (PLB) enabling Boolean operations on port signals, alongside fixed-function TCPWMs supporting center-aligned PWM and comparator-triggered kill signals for motor control safety.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz with single-cycle multiply - enables real-time firmware execution and efficient signal processing in resource-constrained edge nodes. |
| Memory | 32 KB flash (with read accelerator), 4 KB SRAM - sufficient for CAPSENSE™ firmware, communication stacks, and small RTOS deployments without external memory. |
| Capacitive Sensing | CAPSENSE™ v2 with >5:1 SNR and SmartSense auto-tuning - delivers robust touch detection under moisture or EMI without manual calibration. |
| Serial Interfaces | 2 × SCBs, each configurable as I²C/SPI/UART - allows concurrent sensor bus (I²C), display interface (SPI), and host debug (UART) without additional ICs. |
| PWM & Timing | 5 × 16-bit TCPWM blocks with center-aligned, edge-aligned, and pseudo-random modes - supports motor gate drive, LED dimming, and precision timing with hardware kill-signal input. |
| Power Modes | Deep Sleep at 2.5 µA digital current, 1.71–5.5 V operation - enables battery-powered operation for >1 year in intermittent-sense applications. |
| GPIO | Up to 36 pins, all support CAPSENSE™, analog, or digital functions with programmable drive strength/slew rate - simplifies PCB routing and eliminates external level shifters or buffers. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | Accepts 1.71–5.5 V; powers digital logic, analog blocks, and GPIOs - enables direct connection to common battery or LDO rails. |
| VSS | Digital ground | Reference return path for all digital circuitry; must be low-impedance and separated from analog ground per layout guidelines. |
| SWDCLK / SWDIO | Debug interface | ARM Serial Wire Debug pins - provide full-chip programming, breakpoint debugging, and trace without JTAG header or emulator. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Programmable GPIO | Multi-function pins supporting CAPSENSE™, analog input/output, digital logic, LCD segment drive, or serial interface signals - configured at runtime via PDL or Creator. |
| XRES | External reset input | Active-low asynchronous reset pin - allows system-level reset coordination with PMICs or watchdog circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable analog blocks | Two current DACs (IDACs) and two low-power comparators usable on any GPIO - enable flexible sensor biasing, threshold detection, and self-calibration without external components. |
| Programmable digital logic | Boolean logic blocks applied directly to port inputs/outputs - allow glueless implementation of custom state machines or signal conditioning before CPU involvement. |
| CAPSENSE™ v2 engine | Sigma-delta modulation with automatic SmartSense tuning - eliminates manual parameter tuning and maintains stable touch performance across temperature/humidity variations. |
| Runtime-reconfigurable SCBs | Two serial communication blocks independently switchable among I²C, SPI, UART - permits dynamic protocol adaptation (e.g., SPI-to-UART bridge during firmware update). |
| TCPWM kill-signal input | Hardware-triggered immediate PWM shutdown via comparator output - meets functional safety requirements for motor control and power conversion without software latency. |
Applications
| Industrial HMI Panel | Smart Thermostat |
|---|---|
Use Scenario: Touch-based control panel in factory automation with metal enclosure and ambient EMI. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing display refresh via SPI, and communicating with PLC over UART. Use Value: CAPSENSE™ v2's >5:1 SNR and water tolerance ensure reliable touch response despite condensation or glove use; Deep Sleep extends battery life during idle periods. | Use Scenario: Battery-powered residential thermostat with ambient light sensing and HVAC relay control. IC Role / Device Role / Timing Role: System controller handling temperature ADC sampling, capacitive button interface, and timed relay actuation via TCPWM. Use Value: Integrated IDACs drive ambient light sensor; programmable drive strength prevents false triggers on mechanical relays; 2.5 µA Deep Sleep enables 2-year coin-cell operation. |
| Medical Wearable Sensor | IoT Smoke Detector |
Use Scenario: Compact wearable monitoring skin impedance and motion via capacitive electrodes. IC Role / Device Role / Timing Role: Signal acquisition MCU performing CAPSENSE™ measurement, motion data fusion, and BLE communication via SCB. Use Value: Single-chip integration of analog front-end, digital processing, and serial interface reduces BOM count and board area; SmartSense auto-tunes electrode drift over time. | Use Scenario: UL-listed smoke detector with photoelectric sensor, piezo alarm, and wireless reporting. IC Role / Device Role / Timing Role: Safety-critical controller running self-test routines, interpreting optical sensor pulses, and driving alarm tone via TCPWM. Use Value: Comparator-based kill signal disables alarm driver instantly during fault detection; ROM-resident bootloader ensures secure firmware updates without flash corruption risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller with integrated capacitive sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4045LQI-S412 | Same die, identical electrical specs, but shipped in tape-and-reel (S412T) vs. tray (S412) packaging - no functional difference. | No application impact; both support same PCB footprint and thermal profile. | Select S412T for automated SMT assembly; S412 for prototyping or low-volume hand-soldering. |
| CY8C4045AZI-S412T | Same architecture but in 40-pin QFN package (vs. 48-pin TQFP); 2 fewer GPIOs and no LCD segment drive capability. | Not suitable for designs requiring >34 GPIOs or LCD interface; smaller footprint benefits space-constrained layouts. | Choose only if pin count and LCD support are not required; verify GPIO mapping compatibility with existing layout. |
Compared with CY8C4045LQI-S412T, the S412 variant offers identical functionality in tray packaging for manual assembly, while the AZI-S412T reduces size and I/O count for compact, non-LCD applications - selection hinges strictly on packaging logistics and physical interface requirements.
Availability
CY8C4045LQI-S412T is available at Aetrix Electronics and suitable for industrial HMI, smart thermostats, medical wearables, and IoT smoke detectors requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4045LQI-S412T 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, sensing, and microcontroller solutions for industrial, automotive, and IoT markets.
The PSoC™ 4000S product line targets cost-sensitive, low-power embedded systems requiring mixed-signal flexibility - especially where capacitive touch, programmable analog, and reconfigurable digital logic replace discrete component combinations.
FAQ
What development tools are supported for CY8C4045LQI-S412T?
Infineon officially supports ModusToolbox™ (cross-platform, Eclipse-based) and PSoC™ Creator (Windows-only, schematic-driven). Both provide full peripheral configuration, CAPSENSE™ tuning tools, and PDL-based firmware examples. MiniProg4 is the recommended programmer/debugger, and CY8CKIT-145-40XX serves as the reference evaluation kit with breadboard-compatible pin access.
Does CY8C4045LQI-S412T support secure boot or flash encryption?
CY8C4045LQI-S412T includes hardware-assisted flash protection (lock bits, row protection) and disableable SWD debug interface, but lacks dedicated AES encryption engines or secure boot ROM. Secure firmware updates require external crypto co-processors or software-based signing/verification using the 8 KB ROM-resident bootloader and PDL APIs.
Can all 36 GPIOs be used simultaneously for CAPSENSE™ sensing?
No - CAPSENSE™ v2 supports up to 32 sensing channels (electrodes) per device, and shared GPIO resources constrain simultaneous use. The maximum number of active CAPSENSE™ pins depends on scan resolution, SNR targets, and presence of other analog/digital functions on the same port; typical designs use 16–24 electrodes with guard rings and shield drivers.
Is the 48-MHz CPU frequency achievable across the full 1.71–5.5 V supply range?
Yes - the Arm® Cortex®-M0+ core operates at 48 MHz across the entire 1.71–5.5 V range when powered from the internal IMO (±2% accuracy) or an external clock source. Voltage scaling is not required; the device uses adaptive body biasing to maintain timing closure without frequency throttling.
CY8C4045LQI-S412T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4000S
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 27
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4045LQI-S412T FAQ
1.How can I place an order for CY8C4045LQI-S412T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4045LQI-S412T 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 CY8C4045LQI-S412T reliable?
The price and inventory of CY8C4045LQI-S412T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4045LQI-S412T is usually 5 days.
3.What payment methods are accepted for CY8C4045LQI-S412T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4045LQI-S412T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4045LQI-S412T?
CY8C4045LQI-S412T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4045LQI-S412T 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 CY8C4045LQI-S412T?
For technical support, including CY8C4045LQI-S412T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4045LQI-S412T requirements.
6.How does Aetrix verify that CY8C4045LQI-S412T is sourced from the original manufacturer or authorized distributors?
All CY8C4045LQI-S412T 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 CY8C4045LQI-S412T meets industry standards.
7.What is the process for return or replacement of CY8C4045LQI-S412T?
All CY8C4045LQI-S412T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4045LQI-S412T, 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 CY8C4045LQI-S412T part is unused and in its original packaging.
Return procedure for CY8C4045LQI-S412T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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