My Inquiry
My Account
Infineon Technologies CY8C4127LQA-S443T
- Part No.:
- CY8C4127LQA-S443T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CY8C4127LQA-S443T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C4127LQA-S443T from Infineon is an AEC-Q100 Grade-S (–40°C to +105°C) automotive-grade 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 modules, a CAN 2.0B controller with TTCAN support, and programmable analog blocks - deployed in automotive body electronics, touch-enabled control panels, and motor control interfaces.
For engineers reviewing the CY8C4127LQA-S443T datasheet, CY8C4127LQA-S443T pinout, CY8C4127LQA-S443T application, or CY8C4127LQA-S443T equivalent, key selection criteria include AEC-Q100 Grade-S qualification, on-chip CAN 2.0B with time-triggered capability, Deep Sleep current of 2.5 µA, 12-bit 1-Msps SAR ADC with sequencer, and GPIO-configurable CAPSENSE™ on up to 54 pins.
Technical Context
The device implements a tightly integrated mixed-signal SoC architecture where the Arm® Cortex®-M0+ core coordinates programmable digital logic (Smart I/O), configurable analog resources (CTB opamps, SAR ADC, IDACs), and fixed-function peripherals (TCPWM, SCB, CAN). Its clock system combines a 4–33 MHz ECO, PLL for 48-MHz core timing, and low-power oscillators (WCO, ILO) enabling precise real-time operation across temperature.
Capacitive sensing is implemented via a dedicated CSD block delivering >5:1 SNR and water tolerance, supported by hardware-accelerated SmartSense tuning and firmware APIs. The CAN block supports both standard and time-triggered modes, with dedicated message RAM and error counters compliant with ISO 11898-1:2015.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz max - enables deterministic real-time control with Thumb-2 instruction set and NVIC-based interrupt handling. |
| Flash / SRAM | 128 KB flash with Read Accelerator / 16 KB SRAM - supports secure boot, firmware updates, and real-time data buffering without external memory. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended, channel sequencer with averaging - delivers high-resolution sensor acquisition for motor current or battery voltage monitoring. |
| CAN Interface | CAN 2.0B with TTCAN support, 32-message RAM - meets automotive network timing constraints and enables synchronized actuator control in distributed systems. |
| Operating Temp | Grade-S: –40°C to +105°C - qualified for under-hood and cabin control modules per AEC-Q100 Rev G. |
| Low-Power Modes | Deep Sleep: 2.5 µA system current with opamps/ADC active - sustains capacitive touch wake-up and sensor polling in battery-constrained applications. |
| GPIO Count | 54 programmable pins, all CAPSENSE™-capable - allows full-panel touch interface plus peripheral routing without pin multiplexing conflicts. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, wettable flank option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O power domains | Independent 1.71–5.5 V supplies per port group enable mixed-voltage interfacing (e.g., 3.3 V MCU logic + 5 V analog sensors). |
| P0[0]–P9[7] | Programmable GPIO | All pins support CAPSENSE™, analog input/output, digital logic, and configurable drive strength/slew rate - no fixed function pin lock-in. |
| CAN_TX / CAN_RX | Dedicated CAN transceiver interface | Hardwired to internal CAN controller; require external transceiver (e.g., TJA1042) for bus connection and fault protection. |
| XTAL_IN / XTAL_OUT | External crystal oscillator terminals | Support 4–33 MHz ECO for precision timing; essential for CAN bit-rate accuracy and USB-free synchronous communication. |
| SWD_CLK / SWD_IO | ARM Serial Wire Debug interface | Two-pin debug port enabling non-intrusive firmware download, breakpoint debugging, and real-time trace without halting CPU operation. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual threshold tuning and compensates for environmental drift (humidity, temperature) in production. |
| Reconfigurable SCBs | Five independent serial blocks dynamically switch between I²C, SPI, UART, or LIN slave - reduces BOM count and PCB footprint vs. discrete protocol ICs. |
| Deep Sleep Analog Retention | Opamps, comparators, and SAR ADC remain operational at 2.5 µA system current - enables always-on touch wake-up and low-power sensor fusion. |
| TTCAN Support | Time-triggered scheduling with guaranteed message latency and synchronization to global time base - critical for safety-critical actuator coordination (e.g., EPS, HVAC dampers). |
| Programmable Digital Logic | Smart I/O blocks perform Boolean operations (AND/OR/XOR) on GPIO inputs/outputs in hardware - offloads timing-critical logic from CPU, reducing ISR latency. |
Applications
| Automotive Door Module | Touch-Controlled HVAC Panel |
|---|---|
Use Scenario: Centralized control of window lift, mirror fold, and seat position memory in entry-level vehicles. IC Role / Device Role / Timing Role: Main MCU executing LIN slave commands, driving motor drivers via PWM, and monitoring Hall-effect and potentiometer feedback. Use Value: Integrated TCPWM with comparator-triggered kill signals ensures safe motor shutdown during overcurrent; CAN interface enables diagnostics and software updates via vehicle gateway. | Use Scenario: Capacitive touch interface for climate control with slider, buttons, and proximity wake-up in passenger cabin. IC Role / Device Role / Timing Role: CAPSENSE™ master with SmartSense auto-calibration, managing up to 32 sensors while running background BLE communication stack. Use Value: >5:1 SNR and water tolerance prevent false triggers from condensation; Deep Sleep mode draws only 2.5 µA during standby, extending battery backup life. |
| Electric Power Steering (EPS) Sensor Hub | Body Control Module (BCM) Subnode |
Use Scenario: Aggregation and preprocessing of torque, angle, and motor phase current sensors before CAN transmission to main EPS ECU. IC Role / Device Role / Timing Role: Real-time signal conditioner with 12-bit SAR ADC sequencer, opamp-based current sensing, and TTCAN message scheduling. Use Value: On-chip opamps buffer and amplify shunt voltage with rail-to-rail output; TTCAN guarantees sub-100 µs jitter for synchronized torque-angle sampling. | Use Scenario: Distributed lighting and relay control node communicating over low-speed CAN with central BCM. IC Role / Device Role / Timing Role: CAN 2.0B endpoint with message RAM and hardware filtering, managing 16 GPIO-driven LED drivers and load switches. Use Value: Five SCBs allow concurrent CAN, UART (for service tool), and SPI (for EEPROM config storage); programmable drive strength supports direct 12 V lamp switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4128LQI-S443 | Same PSoC™ 4100S Plus family, 64-pin QFN, 128 KB flash, but Grade-A (–40°C to +85°C) and no TTCAN support. | Suitable for non-under-hood infotainment or gateway modules where extended temperature and time-triggered CAN are not required. | Select when cost-sensitive designs omit TTCAN and operate within commercial temp range. |
| NXP S32K144HAT0MLHT | ARM Cortex-M4F core, 112 MHz, 1 MB flash, CAN FD, but lacks integrated CAPSENSE™ and programmable analog blocks. | Better suited for high-performance motor control or OTA update-heavy applications; requires external touch controller and signal conditioning. | Choose when CAN FD bandwidth or floating-point math acceleration outweighs embedded analog flexibility. |
Compared with CY8C4127LQA-S443T, CY8C4128LQI-S443 trades TTCAN and Grade-S qualification for lower cost and larger package, while S32K144HAT0MLHT offers higher compute throughput and CAN FD but demands external components for touch and analog signal chain - making CY8C4127LQA-S443T optimal for integrated, temperature-resilient automotive HMI and sensor hub designs.
Availability
CY8C4127LQA-S443T is available at Aetrix Electronics and suitable for automotive body electronics, touch-enabled control panels, and motor control interfaces requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle assurance.
Supply support for CY8C4127LQA-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 is a German semiconductor leader specializing in power management, automotive MCUs, and security solutions, with global manufacturing and automotive qualification expertise.
This part belongs to the PSoC™ 4100S Plus product line - designed specifically for automotive human-machine interface (HMI) and distributed control nodes requiring integrated capacitive sensing, CAN connectivity, and AEC-Q100 reliability in compact form factors.
FAQ
Does CY8C4127LQA-S443T support CAN FD?
No. CY8C4127LQA-S443T integrates a CAN 2.0B controller compliant with ISO 11898-1:2015, supporting up to 1 Mbps classical CAN frames. It does not implement CAN FD features such as flexible data rate, longer payloads, or CRC enhancements. For CAN FD, consider Infineon's AURIX™ TC3xx family or NXP S32K series.
What development tools are officially supported for this device?
Infineon officially supports ModusToolbox™ 3.x for firmware development and PSoC™ Creator 4.4 for legacy schematic-based design. Both provide full peripheral driver libraries (PDL), CAPSENSE™ middleware, and board support packages for CY8CKIT-041-41XX and CY8CKIT-149 kits. Debugging uses KitProg3 or MiniProg3 programmers with SWD interface.
Can all 54 GPIO pins be used simultaneously for CAPSENSE™?
Yes - all 54 GPIO pins are CAPSENSE™-capable, but practical sensor count depends on mutual capacitance layout and scan time budget. The CSD block supports up to 32 self-capacitance or 16 mutual-capacitance sensors per scan; multiple scans can be sequenced via firmware to cover more electrodes without hardware change.
Is external flash required for firmware updates over CAN?
No. The device includes 128 KB on-chip flash with Read Accelerator and supports dual-bank operation. Bootloader implementations (e.g., using PSoC™ Creator's Bootloadable/Bootloader components) enable secure, field-upgradable firmware via CAN without external memory - leveraging internal flash partitioning and CRC-protected image validation.
CY8C4127LQA-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4127LQA-S443T FAQ
1.How can I place an order for CY8C4127LQA-S443T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4127LQA-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 CY8C4127LQA-S443T reliable?
The price and inventory of CY8C4127LQA-S443T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4127LQA-S443T is usually 5 days.
3.What payment methods are accepted for CY8C4127LQA-S443T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4127LQA-S443T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4127LQA-S443T?
CY8C4127LQA-S443T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4127LQA-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 CY8C4127LQA-S443T?
For technical support, including CY8C4127LQA-S443T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4127LQA-S443T requirements.
6.How does Aetrix verify that CY8C4127LQA-S443T is sourced from the original manufacturer or authorized distributors?
All CY8C4127LQA-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 CY8C4127LQA-S443T meets industry standards.
7.What is the process for return or replacement of CY8C4127LQA-S443T?
All CY8C4127LQA-S443T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4127LQA-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 CY8C4127LQA-S443T part is unused and in its original packaging.
Return procedure for CY8C4127LQA-S443T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C4127LQA-S443T Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
