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Infineon Technologies CY8C4126AXI-S443
- Part No.:
- CY8C4126AXI-S443
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4126AXI-S443.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:292
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Product details
Overview
CY8C4126AXI-S443 from Infineon Technologies (acquired Cypress Semiconductor) is a PSoC 4100S Plus programmable system-on-chip featuring a 48-MHz Arm Cortex-M0+ CPU, 128 KB flash, 16 KB SRAM, integrated CapSense® capacitive sensing, and a CAN 2.0B controller. It delivers best-in-class SNR (>5:1) for touch interfaces, supports Deep Sleep mode at 2.5 µA, and integrates two opamps, a 12-bit 1-Msps SAR ADC, five reconfigurable SCBs (I²C/SPI/UART), and eight TCPWM blocks - deployed in industrial HMI, smart sensor nodes, and motor control edge devices.
For engineers reviewing the CY8C4126AXI-S443 datasheet, CY8C4126AXI-S443 pinout, CY8C4126AXI-S443 application, or CY8C4126AXI-S443 equivalent, key selection criteria include its 44-pin TQFP package with 36 GPIOs, true random number generation (TRNG) for secure boot, CAN 2.0B + TTCAN support, SmartSense™ auto-tuning for CapSense, and SWD debug interface with four breakpoint comparators.
Technical Context
The device implements a single-layer AHB-Lite interconnect linking the Cortex-M0+ core, flash accelerator, SRAM, and peripherals including CAN, TRNG, and CapSense sigma-delta (CSD) blocks. Its clock architecture combines IMO (±2%), ILO (32 kHz), WCO, ECO (4–33 MHz), and PLL to generate stable 48-MHz HFCLK with glitchless switching and fractional dividers for analog/digital peripheral synchronization.
Power management includes three modes: Active (full operation), Sleep (CPU/flash/SRAM clock-gated), and Deep Sleep (2.5 µA system current with opamps and comparators functional). The CapSense CSD block operates independently of CPU load and supports automatic hardware tuning via SmartSense™, while the CAN block supports Time-Triggered CAN (TTCAN) for deterministic timing in safety-critical control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz, single-cycle multiply - enables real-time firmware execution with low latency interrupt response (≤12 cycles). |
| Memory | 128 KB flash (with Read Accelerator), 16 KB SRAM - supports complex firmware with zero-wait-state SRAM access and fast code fetch. |
| Analog Peripherals | 12-bit 1-Msps SAR ADC, 2 opamps (Deep Sleep-capable), 2 low-power comparators - enables high-resolution sensor acquisition and always-on analog monitoring. |
| Digital Peripherals | 5 SCBs (reconfigurable I²C/SPI/UART), 8 TCPWM blocks, CAN 2.0B with TTCAN - provides flexible communication and precise timing for motor control and networked systems. |
| Capacitive Sensing | CapSense® CSD with >5:1 SNR, SmartSense™ auto-tuning - eliminates manual calibration and ensures robust touch performance under moisture or EMI. |
| Security & Debug | TRNG, flash protection, disableable SWD debug (4 breakpoints, 2 watchpoints) - supports secure key generation and tamper-resistant firmware deployment. |
| Power Range | 1.71 V to 5.5 V operation, Deep Sleep current = 2.5 µA - enables battery-powered operation over wide voltage ranges with ultra-low standby consumption. |
Pinout & Package
Package: 44-pin TQFP (0.8 mm pitch), 10 × 10 mm body, exposed thermal pad (not electrically connected). Pinout validated per Cypress Document 002-19966 Rev. *H, Page 10–11 (Pin Functions table and Package Diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO Port 0 | Programmable digital/analog/CapSense pins; support drive strength/slew rate configuration and internal pull-up/down. |
| P1[0]–P1[7] | GPIO Port 1 | Includes dedicated CapSense CSD inputs (e.g., P1[2], P1[3]) and analog input routing to SAR ADC MUX. |
| P2[0]–P2[7] | GPIO Port 2 | Supports CAN TX/RX (P2[0]/P2[1]), SCB0 I²C (P2[4]/P2[5]), and TCPWM outputs (e.g., P2[6]). |
| P3[0]–P3[7] | GPIO Port 3 | Includes SWDIO/SWCLK debug pins (P3[0]/P3[1]), ECO crystal connections (P3[2]/P3[3]), and WCO inputs (P3[4]/P3[5]). |
| VDD, VSS | Power Supply | VDD (1.71–5.5 V), VSS (ground); decoupling required per layout guidelines (AN88619) for stable Deep Sleep operation. |
| XRES | Reset Input | Active-low asynchronous reset; internal pull-up enabled by default; compatible with external RC or supervisor IC reset sources. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® with SmartSense™ | Hardware-accelerated auto-tuning eliminates manual calibration and maintains >5:1 SNR across temperature/humidity variations. |
| Reconfigurable SCBs | Five independent Serial Communication Blocks dynamically assignable as I²C, SPI, or UART - reduces BOM count and simplifies multi-protocol gateway design. |
| Deep Sleep Analog Retention | Opamps and comparators remain active at 2.5 µA system current - enables continuous sensor monitoring without waking CPU. |
| Time-Triggered CAN (TTCAN) | Deterministic message scheduling with synchronized time base - meets functional safety requirements for motor control and industrial automation. |
| SWD Debug Security | Debug interface can be permanently disabled via firmware; re-enabling requires full flash erase - prevents unauthorized firmware extraction or modification. |
Applications
| Industrial HMI Panels | Smart Sensor Edge Nodes |
|---|---|
|
Use Scenario: Touch-enabled operator interface on factory-floor equipment with water/oil exposure. IC Role / Device Role / Timing Role: Primary MCU handling CapSense input, CAN bus communication to PLC, and local PWM-driven status indicators. Use Value: SmartSense™ ensures reliable touch detection under condensation; TTCAN guarantees deterministic command delivery to motion controllers. |
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and vibration in remote locations. IC Role / Device Role / Timing Role: System controller managing SAR ADC sampling, TRNG-based secure OTA updates, and low-power CAN messaging. Use Value: 2.5 µA Deep Sleep extends 10-year battery life; integrated TRNG enables FIPS-compliant key derivation for encrypted payloads. |
| Motor Control Gate Drivers | Medical Diagnostic Handhelds |
|
Use Scenario: Compact BLDC motor driver with position feedback, fault monitoring, and CAN-based commissioning. IC Role / Device Role / Timing Role: Real-time motor commutation using TCPWM center-aligned PWM, comparator-triggered kill signals, and CAN diagnostics. Use Value: Hardware comparator kill path (<100 ns response) prevents MOSFET shoot-through; TTCAN synchronizes multi-axis motion profiles. |
Use Scenario: Portable ultrasound or ECG device requiring low-noise analog front-end and intuitive touch UI. IC Role / Device Role / Timing Role: Mixed-signal SoC integrating SAR ADC for signal acquisition, CapSense for gesture controls, and LCD segment drivers. Use Value: On-chip opamps buffer high-impedance sensor signals before ADC; CapSense CSD achieves medical-grade noise immunity per IEC 60601-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127LQI-S433 | 64-pin QFN, 256 KB flash, 32 KB SRAM, same PSoC 4100S Plus architecture - adds 18 extra GPIOs and larger memory. | Suitable for designs requiring higher I/O density or firmware expansion headroom (e.g., multi-sensor fusion gateways). | Select when board space allows QFN and future firmware growth exceeds 128 KB flash capacity. |
| STM32G071CBT6 | Arm Cortex-M0+, 128 KB flash, 36 KB SRAM, no integrated CapSense or CAN - relies on external components for touch and bus interface. | Applicable where cost sensitivity outweighs integration benefits and external touch controller/CAN transceiver acceptable. | Choose only if CapSense and CAN must be implemented externally and BOM cost reduction is primary objective. |
Compared with CY8C4126AXI-S443, CY8C4127LQI-S433 offers scalable I/O and memory within identical architecture and toolchain, while STM32G071CBT6 requires added components for touch and CAN - increasing PCB area, validation effort, and supply chain complexity.
Availability
CY8C4126AXI-S443 is available at Aetrix Electronics and suitable for industrial HMI, smart sensor edge nodes, motor control gate drivers, and medical diagnostic handhelds requiring stable component supply, long-term lifecycle assurance, and qualified automotive/industrial grade sourcing.
Supply support for CY8C4126AXI-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 acquired Cypress Semiconductor in 2020 and now develops, manufactures, and supports the PSoC family - a leader in programmable mixed-signal SoCs for embedded control and human-machine interaction.
The PSoC 4100S Plus product line targets cost-sensitive, low-power industrial and consumer applications requiring integrated analog, digital, CapSense, and CAN - with emphasis on rapid prototyping via PSoC Creator and field-deployable security features.
FAQ
Does CY8C4126AXI-S443 support USB connectivity?
No. CY8C4126AXI-S443 does not include a USB PHY or USB controller. It supports I²C, SPI, UART, and CAN via its five reconfigurable Serial Communication Blocks (SCBs). For USB host/device functionality, external bridge ICs (e.g., CY7C65215) or migration to PSoC 4 BLE/4000S series with integrated USB are required.
What is the maximum operating temperature for this device?
CY8C4126AXI-S443 is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in the "Device Level Specifications" section (Page 15) of datasheet 002-19966 Rev. *H, with validated operation up to 85 °C junction temperature under specified power dissipation conditions.
Can the CapSense block operate during Deep Sleep mode?
Yes. The CapSense sigma-delta (CSD) block operates autonomously in Deep Sleep mode with CPU and flash powered down. It generates interrupts on touch events and supports SmartSense™ auto-tuning without CPU intervention - verified in Section "Capacitive Sensing" (Page 9) and "Power Modes" (Page 14) of the datasheet.
Is the CAN controller compliant with ISO 11898-1:2015?
Yes. The CAN 2.0B block supports all mandatory features of ISO 11898-1:2015, including bit timing, error framing, arbitration, and TTCAN time synchronization. Compliance is documented in the "CAN Block" subsection (Page 9) and verified through Cypress's CAN conformance test reports referenced in AN219674.
CY8C4126AXI-S443 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- Series:
- PSOC™ 4 CY8C4100S Plus
- 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, POR, PWM, WDT
- Number of I/O:
- 37
- 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 Slope, 16x12b SAR; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126AXI-S443 FAQ
1.How can I place an order for CY8C4126AXI-S443 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-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 CY8C4126AXI-S443 reliable?
The price and inventory of CY8C4126AXI-S443 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-S443 is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-S443?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-S443 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-S443?
CY8C4126AXI-S443 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-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 CY8C4126AXI-S443?
For technical support, including CY8C4126AXI-S443 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-S443 requirements.
6.How does Aetrix verify that CY8C4126AXI-S443 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-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 CY8C4126AXI-S443 meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-S443?
All CY8C4126AXI-S443 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-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 CY8C4126AXI-S443 part is unused and in its original packaging.
Return procedure for CY8C4126AXI-S443:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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