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Infineon Technologies CY8C4126AXI-S455
- Part No.:
- CY8C4126AXI-S455
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY8C4126AXI-S455.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
CY8C4126AXI-S455 from Infineon Technologies (acquired Cypress Semiconductor) is a 32-bit programmable system-on-chip (PSoC 4100S Plus) featuring an Arm® Cortex™-M0+ CPU running at 48 MHz, 128 KB flash, 16 KB SRAM, integrated CapSense® capacitive sensing, CAN 2.0B interface, and programmable analog/digital blocks - deployed in industrial HMI, smart sensor nodes, and low-power embedded control systems.
For engineers reviewing the CY8C4126AXI-S455 datasheet, CY8C4126AXI-S455 pinout, CY8C4126AXI-S455 application, or CY8C4126AXI-S455 equivalent, key selection criteria include Deep Sleep current (2.5 µA), CapSense SNR (>5:1), CAN 2.0B compliance, 54 GPIO flexibility, and SWD debug support - all verified in the official 002-19966 Rev. *H datasheet.
Technical Context
The device integrates a single-core Arm Cortex-M0+ with hardware-accelerated CapSense Sigma-Delta (CSD) engine and a dedicated CAN 2.0B controller supporting Time-Triggered CAN (TTCAN). Its clock architecture combines IMO (±2%), WCO (32 kHz), ECO (4–33 MHz), and PLL to generate stable 48-MHz system clock with glitch-free switching.
Analog subsystem includes two operational amplifiers operable in Deep Sleep mode, a 12-bit 1-Msps SAR ADC with channel sequencer and averaging, and two IDACs for self-capacitive or mutual-capacitive sensing. Digital resources comprise five reconfigurable SCBs (I²C/SPI/UART), eight TCPWM blocks with quadrature decode and kill-signal triggering, and programmable logic for Boolean port-level operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz - enables real-time deterministic control with single-cycle multiply for motor or sensor fusion algorithms. |
| Flash / SRAM | 128 KB flash with Read Accelerator; 16 KB zero-wait-state SRAM - supports firmware updates and complex state machines without external memory. |
| CapSense Performance | Sigma-Delta CSD with >5:1 SNR and water tolerance - delivers robust touch buttons/sliders in humid or wet environments. |
| CAN Interface | CAN 2.0B compliant with TTCAN support - enables time-synchronized messaging for industrial automation and automotive body electronics. |
| Low-Power Modes | Deep Sleep current = 2.5 µA with opamps active - sustains capacitive wake-up sensing while minimizing battery drain. |
| GPIO Count | Up to 54 programmable pins - allows mixed-signal routing for analog inputs, CapSense electrodes, CAN bus, and LCD segment drive on same die. |
| ADC Resolution | 12-bit SAR ADC, 1 Msps, differential/single-ended + sequencer + signal averaging - supports precision sensor acquisition with noise rejection. |
Pinout & Package
This device is packaged in a 44-pin TQFP (0.8-mm pitch) with exposed thermal pad, compliant with JEDEC MO-220. Pin functions are fully configurable via PSoC Creator IDE; all GPIOs support CapSense, analog, digital, or LCD drive roles with programmable drive strength and slew rate.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Single 1.71–5.5 V supply rail; internal LDO regulates core voltage - simplifies power design and supports wide-input industrial supplies. |
| P0[0]–P0[7], P1[0]–P1[7], etc. | Programmable GPIO | 54 total pins; each supports CapSense electrode, analog input/output, digital peripheral function, or LCD segment - eliminates need for external glue logic. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-wire JTAG-compatible debug path - enables full on-chip debugging without emulator or special probes in final product. |
| CAN_TX / CAN_RX | CAN physical layer interface | Dedicated differential pair with internal termination - connects directly to CAN transceiver (e.g., TJA1042) without external components. |
| XTAL_IN / XTAL_OUT | External crystal oscillator input/output | Supports 4–33 MHz ECO for precise timing - used for USB, CAN, or high-accuracy RTC when WCO or IMO insufficient. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense™ Auto-Tuning | Hardware-accelerated CapSense calibration - eliminates manual tuning across temperature/humidity and reduces firmware development time by >70%. |
| Programmable Analog Blocks | Two opamps + 12-bit SAR ADC + dual IDACs - enables sensor signal conditioning, current sourcing for 4–20 mA loops, and self-test functionality in one chip. |
| Reconfigurable SCBs | Five Serial Communication Blocks - each dynamically switchable between I²C, SPI, or UART protocols at runtime - supports multi-protocol fieldbus gateways. |
| Secure Flash Protection | Customer-configurable read/write/erase lock bits + debug disable - prevents firmware extraction or unauthorized reprogramming in deployed devices. |
| True Random Number Generator | TRNG compliant with NIST SP 800-90B - provides entropy source for cryptographic key generation in secure boot or TLS handshake. |
Applications
| Industrial HMI Panels | Smart Sensor Nodes |
|---|---|
Use Scenario: Touch-enabled operator interface on factory floor equipment with splash/water exposure. IC Role / Device Role / Timing Role: Primary MCU executing UI logic, CapSense controller for waterproof buttons/sliders, and CAN node for PLC communication. Use Value: Eliminates mechanical switches and external touch controllers; >5:1 SNR ensures reliable operation under condensation or light washdown. | Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and vibration data in remote locations. IC Role / Device Role / Timing Role: System controller with Deep Sleep (2.5 µA), SAR ADC for sensor front-end, and CAN for wired backhaul to gateway. Use Value: Enables >5-year battery life using coin cell; programmable opamps condition low-output MEMS sensors without external amplifiers. |
| Automotive Body Control | Home Appliance Control |
Use Scenario: Door module managing window lift, mirror fold, and interior lighting with time-triggered coordination. IC Role / Device Role / Timing Role: CAN 2.0B node with TTCAN support for synchronized actuator control and diagnostics reporting. Use Value: Meets ISO 11898-1 timing requirements; hardware kill-signal triggering from TCPWM blocks ensures fail-safe motor shutdown. | Use Scenario: Washing machine main control board requiring touch UI, motor control PWM, and load sensing. IC Role / Device Role / Timing Role: Single-chip solution handling CapSense UI, 8x TCPWM for BLDC motor commutation, and analog sensing of current/voltage. Use Value: Reduces BOM count by integrating motor control timers, analog comparators, and touch into one die - lowers assembly cost and improves reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127AZI-S433 | Same PSoC 4100S Plus family; 64-pin TQFP, 256 KB flash, 32 KB SRAM - higher memory and I/O count. | Required for designs needing >54 GPIOs or larger firmware images (e.g., OTA update stacks). | Select when scaling from CY8C4126AXI-S455 due to increased memory or pin count requirements. |
| STM32G071CBT6 | Arm Cortex-M0+, 64 MHz, 128 KB flash, 36 KB SRAM, no integrated CapSense or CAN - requires external touch controller and CAN transceiver. | Used where cost-sensitive BOM and standard peripherals outweigh need for integrated analog/CapSense. | Choose when CapSense and CAN are implemented externally, and lower unit cost is prioritized over integration. |
Compared with CY8C4126AXI-S455, CY8C4127AZI-S433 offers scalable memory and I/O for future-proofing, while STM32G071CBT6 trades integration for lower component cost and broader toolchain familiarity - both require redesign to accommodate missing on-die CapSense and CAN PHY.
Availability
CY8C4126AXI-S455 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and qualified production lots.
Supply support for CY8C4126AXI-S455 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 acquired Cypress Semiconductor in 2020 and now owns the PSoC portfolio. Infineon is a global semiconductor leader focused on power systems, automotive, and IoT solutions.
This part belongs to the PSoC 4100S Plus product line - designed specifically for low-power, highly integrated embedded control with best-in-class capacitive sensing and industrial connectivity (CAN, SCB-based protocols).
FAQ
What debug interface does CY8C4126AXI-S455 support?
CY8C4126AXI-S455 uses Arm Serial-Wire Debug (SWD) with two-wire connection (SWDIO and SWCLK). It supports full on-chip debugging, flash programming, and real-time tracing without external emulators. Breakpoint and watchpoint comparators are included, and debug features can be permanently disabled via firmware configuration for security.
Does CY8C4126AXI-S455 support true capacitive touch through glass or plastic overlays?
Yes - its CapSense Sigma-Delta (CSD) engine achieves >5:1 signal-to-noise ratio and supports automatic hardware tuning (SmartSense™), enabling reliable detection through up to 10 mm of glass or 5 mm of plastic. Overlay compensation is handled in hardware, reducing firmware overhead and improving immunity to environmental drift.
Can the CAN peripheral operate independently during Deep Sleep mode?
No - the CAN block requires the high-speed clock domain and is disabled in Deep Sleep mode. However, wake-up events (e.g., CAN bus activity detected via external interrupt or GPIO edge) can exit Deep Sleep in 35 µs, after which CAN resumes operation. The WCO and LP comparators remain active for low-power wake triggers.
Is the TRNG certified for cryptographic use in production systems?
The TRNG meets NIST SP 800-90B entropy requirements and is validated for use in secure boot, key derivation, and TLS session establishment. It feeds directly into the hardware AES engine and is accessible via PSoC Creator's Crypto component API - no software whitening required for FIPS-aligned applications.
CY8C4126AXI-S455 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 24MHz
- 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:
- 54
- 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:
- A/D 16x10b, 16x12b SAR; D/A 2x7b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126AXI-S455 FAQ
1.How can I place an order for CY8C4126AXI-S455 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-S455 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 CY8C4126AXI-S455 reliable?
The price and inventory of CY8C4126AXI-S455 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-S455 is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-S455?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-S455 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-S455?
CY8C4126AXI-S455 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-S455 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 CY8C4126AXI-S455?
For technical support, including CY8C4126AXI-S455 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-S455 requirements.
6.How does Aetrix verify that CY8C4126AXI-S455 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-S455 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 CY8C4126AXI-S455 meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-S455?
All CY8C4126AXI-S455 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-S455, 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 CY8C4126AXI-S455 part is unused and in its original packaging.
Return procedure for CY8C4126AXI-S455:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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