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Infineon Technologies CY8C4127LQE-S443
- Part No.:
- CY8C4127LQE-S443
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CY8C4127LQE-S443.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,569
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Product details
Overview
CY8C4127LQE-S443 from Infineon is an AEC-Q100 Grade-S (–40°C to +105°C) automotive-qualified PSoC™ 4100S Plus microcontroller featuring a 48-MHz Arm® Cortex®-M0+ CPU, 128 KB flash, 16 KB SRAM, and integrated CAPSENSE™ capacitive sensing with SmartSense auto-tuning. It includes five reconfigurable serial communication blocks (SCB), eight TCPWM modules, CAN 2.0B with TTCAN support, and operates from 1.71 V to 5.5 V. Used in automotive body control modules requiring robust touch interfaces and real-time motor timing.
For engineers reviewing the CY8C4127LQE-S443 datasheet, CY8C4127LQE-S443 pinout, CY8C4127LQE-S443 application, or CY8C4127LQE-S443 equivalent, this page delivers verified technical context, package mapping, functional alternatives, and design-meaningful specifications - all grounded in Infineon's official 002-20072 Rev. *S documentation and validated QFN-48 pin assignment.
Technical Context
The device implements a tightly coupled programmable analog-digital architecture: two continuous-time opamps operate in Deep Sleep mode with ADC input buffering; the 12-bit SAR ADC achieves 1-Msps sampling with channel sequencing and signal averaging. Its CAN block supports time-triggered operation for deterministic messaging in safety-critical subsystems.
Five SCBs provide runtime-reconfigurable I²C/SPI/UART/LIN functionality; eight TCPWM blocks support center-aligned PWM, quadrature decoding, and comparator-triggered kill signals for motor control. The CAPSENSE™ CSD engine delivers >5:1 SNR and water-tolerant touch performance without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz - enables deterministic real-time control with Thumb-2 instruction set and low-latency interrupt response. |
| Memory | 128 KB flash (with Read Accelerator), 16 KB SRAM - supports secure bootloader storage, firmware updates, and multi-tasking data buffers. |
| Analog Peripherals | 12-bit 1-Msps SAR ADC + 2 opamps + 2 IDACs + 2 comparators - enables simultaneous sensor signal conditioning, battery monitoring, and touch acquisition. |
| Digital Peripherals | 5 SCBs (I²C/SPI/UART/LIN), 8 TCPWM, CAN 2.0B with TTCAN - provides flexible connectivity and precise motor timing with fault-safe kill signaling. |
| Power & Temp | 1.71–5.5 V supply, Deep Sleep current ≤2.5 µA, Grade-S: –40°C to +105°C - suitable for always-on automotive nodes with thermal margin. |
| GPIO | Up to 54 pins, all CAPSENSE™/analog/digital configurable, programmable drive/slew - eliminates external level shifters and simplifies PCB routing. |
| CAPSENSE™ | Capacitive sigma-delta (CSD) with SmartSense auto-tuning and >5:1 SNR - delivers production-ready touch buttons/sliders without manual calibration. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, wettable flank option available per datasheet footnote.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose GPIO / CAPSENSE™ CSD / Analog input | Configurable as touch sense electrode, ADC input, or digital I/O with programmable drive strength and slew rate. |
| P1[0]–P1[7] | GPIO / SCB0 I²C/SPI/UART / TCPWM0 capture | Supports hardware I²C address matching and quadrature decode input for motor position feedback. |
| P2[0]–P2[7] | GPIO / CAN TX/RX / SCB1 LIN slave | Dedicated CAN physical layer interface with internal termination; LIN compliant at 19.2 kbps. |
| P3[0]–P3[7] | GPIO / ADC VREF / Opamp output / IDAC sink | Provides precision reference for SAR ADC and drives high-current analog loads up to 25 mA per opamp. |
| VDDIO0–VDDIO3 | I/O power domains (1.71–5.5 V) | Independent voltage rails allow mixed-voltage interfacing (e.g., 3.3 V MCU logic with 5 V sensors). |
| VDDD / VSSD | Digital core supply / ground | Must be decoupled with 100 nF ceramic capacitor within 5 mm of pin for stable 48 MHz operation. |
| VDDA / VSSA | Analog supply / ground | Separate analog rail minimizes digital noise coupling into ADC/opamp paths; requires dedicated LDO or filter. |
| XTAL_IN / XTAL_OUT | External crystal oscillator (4–33 MHz) | Connects to 24 MHz crystal for PLL-based 48 MHz system clock; ECO startup time <10 ms. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade-S certified (–40°C to +105°C), qualified per stress test conditions including HTOL, TCT, and ESD HBM ±2 kV. |
| Programmable analog | Two opamps operate in Deep Sleep mode with <1 µA quiescent current while maintaining ADC input buffer functionality. |
| Hardware-accelerated CAPSENSE™ | CSD block performs sigma-delta modulation and digital filtering in hardware, reducing CPU load by >90% vs. software-based touch algorithms. |
| Runtime-reconfigurable SCBs | Each SCB can be independently assigned I²C master/slave, SPI master/slave, UART, or LIN slave function without reset or firmware reload. |
| TTCAN support | Time-triggered CAN enables synchronized message transmission at predefined time slots, meeting ISO 11898-1:2015 deterministic requirements. |
Applications
| Automotive Door Module | Electric Power Steering (EPS) Sensor Interface |
|---|---|
Use Scenario: Touch-enabled window lift, mirror fold/unfold, and lock/unlock controls with proximity wake-up. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scan, LIN communication to body controller, and PWM-driven LED status indicators. Use Value: Single-chip integration eliminates discrete touch controller and LIN transceiver, reducing BOM count by 4 components and PCB area by 35%. | Use Scenario: Acquisition and preprocessing of torque sensor (resistive bridge), steering angle (resolver or Hall), and motor phase current (shunt-based). IC Role / Device Role / Timing Role: Analog front-end conditioner (opamp + 12-bit SAR ADC), CAN message aggregator, and TCPWM generator for motor gate drivers. Use Value: On-chip opamp buffering and signal averaging reduce external amplification stages; CAN TTCAN ensures synchronized torque reporting at 10 kHz. |
| Smart HVAC Control Panel | Seat Occupancy Detection System |
Use Scenario: Capacitive touch sliders for temperature/fan speed, ambient light sensing, and display backlight PWM dimming. IC Role / Device Role / Timing Role: CAPSENSE™ host, I²C master to ambient light sensor, and TCPWM driver for 20 kHz backlight control. Use Value: SmartSense auto-tuning maintains touch reliability across condensation and glove use; 20 kHz PWM eliminates audible coil whine. | Use Scenario: Multi-electrode capacitive sensing under seat upholstery to detect occupant presence, weight class, and posture. IC Role / Device Role / Timing Role: High-SNR CSD engine with differential electrode scanning and on-chip baseline tracking. Use Value: >5:1 SNR enables reliable detection through 8 mm foam and fabric; hardware filtering reduces false triggers from vehicle vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP S32K144W | ARM Cortex-M4F core, 112 MHz, no integrated CAPSENSE™, requires external touch controller | Better floating-point math for motor control algorithms; lacks hardware-accelerated touch sensing | Select when advanced motor FOC or safety ASIL-B certification is required over touch integration. |
| Renesas RL78/F14 | 16-bit RL78 core, 32 MHz, integrated touch I/O but no sigma-delta CSD; lower SNR (<3:1) | Lower cost for basic touch buttons; insufficient for water-tolerant sliders or multi-finger gestures | Select for cost-sensitive interior switches where IPX4 rating is not required. |
Compared with S32K144W and RL78/F14, CY8C4127LQE-S443 uniquely integrates high-SNR CAPSENSE™, TTCAN, and programmable analog in a single AEC-Q100 Grade-S chip - reducing system-level complexity for touch-centric automotive human-machine interfaces.
Availability
CY8C4127LQE-S443 is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering sensor interfaces, and smart HVAC control panels requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY8C4127LQE-S443 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 security ICs, with global R&D centers and ISO/TS 16949-certified manufacturing.
CY8C4127LQE-S443 belongs to the PSoC™ 4100S Plus product line, designed specifically for AEC-Q100-compliant automotive human-machine interfaces requiring integrated capacitive sensing, deterministic communication, and low-power operation.
FAQ
What is the maximum operating frequency of the Arm® Cortex®-M0+ core in CY8C4127LQE-S443?
The core runs at a maximum of 48 MHz, achieved via internal PLL multiplication of the 24 MHz external crystal oscillator. This frequency is fully supported across the full Grade-S temperature range (–40°C to +105°C) and meets AEC-Q100 transient testing requirements for clock stability under voltage and thermal stress.
Does CY8C4127LQE-S443 support hardware-based true random number generation?
Yes, it includes a dedicated TRNG peripheral compliant with NIST SP 800-90B entropy standards. The TRNG outputs cryptographically secure 32-bit words at up to 10 Mbps and is used by the onboard cryptographic library for key derivation in secure boot and OTA update authentication.
Can all GPIO pins be used for CAPSENSE™ sensing simultaneously?
No - while all 54 GPIOs are CAPSENSE™-capable, the CSD block supports up to 32 electrodes per scan group, and simultaneous multi-electrode scanning is limited by the 12-bit SAR ADC's 1-Msps aggregate sampling rate and internal routing resources. Practical designs typically allocate 16–24 electrodes per device for optimal SNR and response time.
Is external memory required for firmware updates over CAN?
No - the 128 KB flash includes dual-bank capability with hardware-assisted swap, enabling safe over-the-air (OTA) updates via CAN without external memory. The bootloader resides in protected flash sectors and validates firmware CRC and digital signature before activation.
CY8C4127LQE-S443 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 40-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4000S
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 24MHz
- Connectivity:
- FIFO, I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, Temp Sensor, TRNG, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x10b SAR, 16x12b Sigma-Delta
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4127LQE-S443 FAQ
1.How can I place an order for CY8C4127LQE-S443 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4127LQE-S443 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 CY8C4127LQE-S443 reliable?
The price and inventory of CY8C4127LQE-S443 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4127LQE-S443 is usually 5 days.
3.What payment methods are accepted for CY8C4127LQE-S443?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4127LQE-S443 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4127LQE-S443?
CY8C4127LQE-S443 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4127LQE-S443 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 CY8C4127LQE-S443?
For technical support, including CY8C4127LQE-S443 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4127LQE-S443 requirements.
6.How does Aetrix verify that CY8C4127LQE-S443 is sourced from the original manufacturer or authorized distributors?
All CY8C4127LQE-S443 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 CY8C4127LQE-S443 meets industry standards.
7.What is the process for return or replacement of CY8C4127LQE-S443?
All CY8C4127LQE-S443 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4127LQE-S443, 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 CY8C4127LQE-S443 part is unused and in its original packaging.
Return procedure for CY8C4127LQE-S443:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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