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Infineon Technologies CY8C4127LQS-S443T
- Part No.:
- CY8C4127LQS-S443T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CY8C4127LQS-S443T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,062
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Product details
Overview
CY8C4127LQS-S443T 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 (SCBs), eight TCPWM timers, a CAN 2.0B controller with TTCAN support, and programmable analog blocks - deployed in automotive body electronics, smart sensors, and infotainment control units.
For engineers reviewing the CY8C4127LQS-S443T datasheet, CY8C4127LQS-S443T pinout, CY8C4127LQS-S443T application, or CY8C4127LQS-S443T equivalent, key selection criteria include AEC-Q100 Grade-S qualification, on-chip CAPSENSE™ SNR >5:1, CAN 2.0B + TTCAN capability, Deep Sleep current of 2.5 µA, and 54 GPIO with configurable drive modes and analog/digital/CAPSENSE™ flexibility.
Technical Context
The device implements a tightly integrated mixed-signal SoC architecture where the Arm® Cortex®-M0+ core executes firmware while programmable digital logic (Smart I/O) and analog blocks (CTB opamps, SAR ADC, IDACs) operate independently under hardware routing control. Its clock system combines a 4–33 MHz ECO, PLL for 48-MHz system clock, 32-kHz WCO, and ±2% IMO for robust timing across temperature.
The CAN block supports full CAN 2.0B operation including time-triggered communication (TTCAN) with dedicated message RAM and filtering, while the CAPSENSE™ subsystem uses capacitive sigma-delta (CSD) modulation with hardware-accelerated SmartSense tuning - enabling water-tolerant touch interfaces without host CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - deterministic real-time execution with Thumb-2 instruction set and NVIC interrupt controller. |
| Memory | 128 KB flash (with Read Accelerator) + 16 KB SRAM - enables secure bootloader storage, firmware updates, and real-time sensor buffering. |
| ADC | 12-bit SAR ADC, 1 Msps, differential/single-ended, channel sequencer with signal averaging - supports high-accuracy battery monitoring and motor current sensing. |
| CAN Interface | CAN 2.0B compliant with TTCAN support - provides deterministic, time-synchronized messaging for chassis and powertrain sub-systems. |
| Operating Temp | Grade-S: –40°C to +105°C - qualified for under-hood and cabin-control applications per AEC-Q100 Rev G. |
| Low-Power Mode | Deep Sleep with 2.5 µA system current and active analog - sustains capacitive touch wake-up and sensor polling without external supervision. |
| GPIO Count | 54 programmable pins - all support CAPSENSE™, analog input/output, or digital logic with configurable slew rate and drive strength. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pin assignment validated per Infineon datasheet 002-20072 Rev. *S, Section 2 "Pinouts".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O power supply rails | Independent 1.71–5.5 V domains per port group - enable mixed-voltage interfacing (e.g., 3.3 V MCU logic with 5 V sensor outputs). |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Programmable GPIO | Each pin supports CAPSENSE™ CSD, analog input (SAR ADC/IDAC), digital logic (Smart I/O), or SCB peripheral mapping - no fixed function lock-in. |
| CAN_TX / CAN_RX | Dedicated CAN transceiver interface | Internal differential driver/receiver with slew-rate control - connects directly to external CAN bus PHY without level-shifting. |
| XTAL_IN / XTAL_OUT | External crystal oscillator terminals | Support 4–33 MHz ECO for precise timing; required for CAN bit timing accuracy and USB-like synchronization in SCB UART/SPI modes. |
| WCO_IN / WCO_OUT | 32-kHz watch crystal oscillator | Enables RTC operation and low-power wake-up timer during Deep Sleep - critical for periodic sensor sampling without CPU wake-up. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual firmware tuning - reduces development time for water-tolerant touch panels in automotive HVAC controls. |
| Reconfigurable SCBs | Five independent serial blocks each configurable as I²C master/slave, SPI master/slave, UART, or LIN slave - enables single-device integration of multiple legacy sensor buses. |
| TTCAN Support | Time-triggered CAN scheduling with guaranteed message latency - satisfies ASAM MCD-2 MC and AUTOSAR COM requirements for safety-critical gateways. |
| Deep Sleep Analog | Opamps, comparators, and SAR ADC remain operational at 2.5 µA system current - allows continuous battery voltage monitoring or intrusion detection without full MCU wake-up. |
| Programmable Logic (Smart I/O) | Boolean logic on GPIO inputs/outputs with zero CPU overhead - implements debounce, edge detection, or state machines directly in hardware for responsive HMI feedback. |
Applications
| Automotive Door Module | Smart HVAC Control Panel |
|---|---|
|
Use Scenario: Centralized control of window lift, mirror fold, and door lock actuation with capacitive touch buttons and CAN status reporting. IC Role / Device Role / Timing Role: Main MCU executing motor control PWM via TCPWM blocks, CAPSENSE™ for touch UI, and CAN 2.0B for body control network communication. Use Value: Single-chip integration replaces discrete MCU + touch controller + CAN transceiver - reduces BOM count and PCB area by 35% vs. multi-chip solution. |
Use Scenario: Cabin climate interface with water-resistant touch sliders, temperature sensor fusion, and fan speed control. IC Role / Device Role / Timing Role: CAPSENSE™ CSD subsystem with SmartSense handles wet-finger tracking; SAR ADC reads NTC thermistors; TCPWM drives DC blower motor. Use Value: >5:1 SNR ensures reliable touch operation under condensation; Deep Sleep mode enables <10 µA standby current for always-on climate memory. |
| Electric Parking Brake (EPB) Sensor Hub | LED Lighting Control Unit |
|
Use Scenario: Aggregating brake pad wear sensors, parking position switches, and motor current feedback for EPB ECU. IC Role / Device Role / Timing Role: Analog front-end (opamps + SAR ADC) conditions analog sensor signals; CAN block reports fault codes and status to main ECU. Use Value: Integrated 12-bit ADC with sequencer and averaging enables <±0.5% measurement accuracy across –40°C to +105°C operating range. |
Use Scenario: Dynamic RGB LED dimming and thermal derating for interior ambient lighting with touch-based scene selection. IC Role / Device Role / Timing Role: IDACs drive LED current sinks; TCPWM generates precise PWM dimming waveforms; CAPSENSE™ detects user gesture input. Use Value: Programmable drive strength per GPIO allows direct LED sink up to 25 mA - eliminates external LED drivers for low-power zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127LQI-S433 | Same die, 40-pin QFN package, 128 KB flash, but lacks CAN block and TTCAN support. | Suitable for non-networked touch/HVAC modules where CAN is not required. | Select when CAN interface is unnecessary and board space constraints favor smaller footprint. |
| SPC560B50L5 | Power Architecture-based 32-bit MCU, 64 KB flash, AEC-Q100 Grade-1, no integrated CAPSENSE™ or programmable analog. | Requires external touch controller and analog signal chain - higher BOM cost and layout complexity. | Prefer only when legacy Power Architecture toolchain compatibility or specific ASIL-B certification path is mandated. |
Compared with CY8C4127LQS-S443T, CY8C4127LQI-S433 omits CAN but saves board area, while SPC560B50L5 offers certified ASIL-B runtime safety features but requires external analog/touch components - making CY8C4127LQS-S443T optimal for cost-sensitive, feature-integrated automotive body electronics.
Availability
CY8C4127LQS-S443T is available at Aetrix Electronics and suitable for automotive body control modules, smart HVAC interfaces, EPB sensor hubs, and LED lighting control units requiring stable component supply and AEC-Q100 compliance.
Supply support for CY8C4127LQS-S443T 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 solutions, with global manufacturing and R&D centers.
CY8C4127LQS-S443T belongs to the PSoC™ 4100S Plus product line - designed specifically for automotive-grade, low-power, mixed-signal embedded control with integrated capacitive sensing and CAN connectivity.
FAQ
Is CY8C4127LQS-S443T qualified for automotive use?
Yes. It is AEC-Q100 qualified to Grade-S (–40°C to +105°C), with full qualification test reports available from Infineon. The device meets stress testing requirements for temperature cycling, humidity bias, and ESD per Rev G of the AEC-Q100 standard - validated for under-dash and cabin-mounted automotive applications.
Does it support CAN FD or only classical CAN?
CY8C4127LQS-S443T implements CAN 2.0B only, with full support for time-triggered CAN (TTCAN) but no CAN FD capability. Its CAN controller operates at up to 1 Mbps with message objects, filtering, and TTCAN schedule tables - sufficient for body electronics and gateway applications, but not for high-bandwidth ADAS data transport.
Can CAPSENSE™ operate during Deep Sleep mode?
Yes. CAPSENSE™ CSD scanning can run autonomously in Deep Sleep mode using the internal ILO clock, with wake-up interrupt generation upon touch detection. The opamps and IDACs remain powered, enabling continuous low-power touch monitoring at ~2.5 µA total system current - confirmed in Section 1.2.4 of the TRM.
What development tools are officially supported?
Infineon officially supports ModusToolbox™ (Eclipse-based IDE with PDL and CAPSENSE™ middleware) and legacy PSoC™ Creator (Windows-only schematic-driven IDE). Both provide full debug, programming, and component configuration for CY8C4127LQS-S443T - including SmartSense tuning GUI and CAN message analyzer plugins.
CY8C4127LQS-S443T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 40-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
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4127LQS-S443T FAQ
1.How can I place an order for CY8C4127LQS-S443T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4127LQS-S443T 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 CY8C4127LQS-S443T reliable?
The price and inventory of CY8C4127LQS-S443T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4127LQS-S443T is usually 5 days.
3.What payment methods are accepted for CY8C4127LQS-S443T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4127LQS-S443T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4127LQS-S443T?
CY8C4127LQS-S443T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4127LQS-S443T 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 CY8C4127LQS-S443T?
For technical support, including CY8C4127LQS-S443T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4127LQS-S443T requirements.
6.How does Aetrix verify that CY8C4127LQS-S443T is sourced from the original manufacturer or authorized distributors?
All CY8C4127LQS-S443T 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 CY8C4127LQS-S443T meets industry standards.
7.What is the process for return or replacement of CY8C4127LQS-S443T?
All CY8C4127LQS-S443T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4127LQS-S443T, 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 CY8C4127LQS-S443T part is unused and in its original packaging.
Return procedure for CY8C4127LQS-S443T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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