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Infineon Technologies CY8C4126AXI-S445
- Part No.:
- CY8C4126AXI-S445
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY8C4126AXI-S445.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
CY8C4126AXI-S445 from 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, CAN 2.0B interface, and programmable analog/digital blocks. It targets embedded control applications requiring mixed-signal integration, low-power operation (2.5 µA Deep Sleep), and hardware-accelerated touch sensing in industrial HMI and IoT edge nodes.
For engineers reviewing the CY8C4126AXI-S445 datasheet, CY8C4126AXI-S445 pinout, CY8C4126AXI-S445 application, or CY8C4126AXI-S445 equivalent, key selection criteria include its 44-pin TQFP package, 54 GPIOs with CapSense support on any pin, 12-bit 1-Msps SAR ADC, CAN 2.0B block with TTCAN, and Deep Sleep analog retention capability.
Technical Context
The device integrates a single-core Arm Cortex-M0+ with tightly coupled flash accelerator and 8-channel DMA, enabling deterministic real-time control. Its analog subsystem includes two opamps operable in Deep Sleep, a 12-bit SAR ADC with channel sequencer and averaging, and a dedicated capacitance-sensing block supporting Sigma-Delta (CSD) with >5:1 SNR.
Digital resources comprise five reconfigurable Serial Communication Blocks (SCBs) for I²C/SPI/UART, eight 16-bit TCPWM blocks with quadrature decode and comparator-triggered kill signals, and programmable logic blocks for Boolean operations on GPIOs - all routed via a high-speed interconnect matrix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - delivers deterministic real-time execution with single-cycle multiply for motor control and sensor fusion. |
| Flash Memory | 128 KB with Read Accelerator - enables zero-wait-state code execution at full speed and supports secure firmware updates. |
| SRAM | 16 KB, zero wait-state - sufficient for real-time buffering of ADC samples, CAN message queues, and CapSense baseline tracking. |
| Analog Peripherals | 2 opamps (Deep Sleep capable), 12-bit 1-Msps SAR ADC, 2 IDACs, 2 LP comparators - supports simultaneous analog signal conditioning and capacitive sensing without waking CPU. |
| Digital Peripherals | 5 SCBs (I²C/SPI/UART), 8 TCPWM blocks, CAN 2.0B with TTCAN - enables multi-protocol connectivity and precise timing-critical functions like motor commutation and synchronized sensor sampling. |
| Power Modes | Deep Sleep @ 2.5 µA (digital) + active analog - allows continuous CapSense or comparator monitoring while preserving battery life in portable devices. |
| GPIO | Up to 54 pins, all CapSense/analog/digital configurable - eliminates external components for touch buttons, LED drivers, and analog front-ends. |
Pinout & Package
Package: 44-pin TQFP (0.8 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 1.71–5.5 V input; powers digital logic, flash, and SRAM; requires local decoupling per datasheet layout rules. |
| VSS | Ground reference | Common return path for all analog/digital circuits; must be connected to low-impedance ground plane. |
| P0[0]–P0[7] | Programmable GPIO bank | Supports CapSense, analog input/output, digital logic, and SCB functions; slew rate and drive strength configurable per pin. |
| SWDCLK / SWDIO | Debug interface | Two-wire Serial Wire Debug interface for programming and full-chip debugging; enabled by default, disableable in firmware for security. |
| CAN_TX / CAN_RX | CAN bus interface | Differential transceiver pins compliant with ISO 11898-2; require external termination and ESD protection for automotive-grade robustness. |
| XRES | External reset input | Active-low asynchronous reset; debounced internally; used for system-level fault recovery and brown-out coordination. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® CSD with SmartSense™ | Hardware-accelerated capacitive sensing with automatic tuning and >5:1 SNR - eliminates manual calibration and improves water-tolerance in consumer HMI designs. |
| Programmable Analog Blocks | Reconfigurable opamps and switched-capacitor circuits - enable custom analog front-ends (e.g., current sensing, filter stages) without external components. |
| Time-Triggered CAN (TTCAN) | Deterministic CAN scheduling with guaranteed latency - meets functional safety requirements for industrial motion control and distributed actuation. |
| Deep Sleep with Analog Retention | Opamps, comparators, and CapSense remain active at 2.5 µA - enables always-on touch wake-up and low-power sensor monitoring in battery-powered edge nodes. |
| Secure Flash Protection | Configurable read/write/erase lock per flash row and debug disable - prevents firmware extraction and unauthorized reprogramming in deployed systems. |
Applications
| Industrial HMI Panels | Smart Home Sensors |
|---|---|
Use Scenario: Touch-enabled control panels for PLCs, HVAC controllers, and factory HMIs operating in electrically noisy environments. IC Role / Device Role / Timing Role: System controller with integrated CapSense, CAN bus master, and real-time PWM generation for status LEDs and fan control. Use Value: Eliminates external touch controller and CAN transceiver, reducing BOM count and PCB area while maintaining >5:1 SNR under EMI stress. | Use Scenario: Battery-powered occupancy/motion sensors with ambient light and temperature monitoring in residential gateways. IC Role / Device Role / Timing Role: Low-power sensor hub managing CapSense wake-up, SAR ADC sampling, and UART-to-Matter bridge communication. Use Value: Achieves 3-year battery life via Deep Sleep analog retention and hardware-averaged ADC readings, avoiding MCU wake-ups for baseline updates. |
| Automotive Body Controllers | Medical Wearable Interfaces |
Use Scenario: Door module controllers handling window lift, mirror adjustment, and interior lighting with CAN network integration. IC Role / Device Role / Timing Role: CAN 2.0B node with TTCAN scheduling, TCPWM for motor drive, and GPIO-driven LED dimming. Use Value: Meets ASIL-B timing constraints through deterministic CAN frame transmission and hardware-triggered kill signals for motor stall protection. | Use Scenario: Clinical-grade pulse oximeter with capacitive touch controls and optical sensor signal conditioning. IC Role / Device Role / Timing Role: Analog front-end conditioner (opamp + IDAC), CapSense UI controller, and USB-CDC interface via SCB. Use Value: Single-chip solution replaces discrete opamp, ADC driver, and microcontroller - reduces leakage paths and improves signal integrity for <1% SpO₂ measurement error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127AZI-S445 | Same core, 64-pin TQFP, 256 KB flash, 32 KB SRAM - higher memory density and GPIO count. | Required for designs needing >128 KB flash or >54 GPIOs; larger footprint and higher cost. | Select when firmware complexity exceeds 128 KB or board layout accommodates 64-pin TQFP. |
| STM32G474RET6 | Arm Cortex-M4F, 512 KB flash, 128 KB SRAM, no integrated CapSense - superior compute but external touch IC needed. | Suitable for math-intensive control (e.g., FOC motor drives) but adds BOM cost and layout complexity for touch interfaces. | Choose when floating-point performance outweighs integrated analog/touch benefits and external CapSense is acceptable. |
Compared with CY8C4127AZI-S445 and STM32G474RET6, CY8C4126AXI-S445 offers optimal balance of CapSense integration, CAN+TCPWM timing precision, and 44-pin compactness - ideal for cost-sensitive, space-constrained HMI and sensor nodes where analog programmability reduces component count.
Availability
CY8C4126AXI-S445 is available at Aetrix Electronics and suitable for industrial HMI panels, smart home sensors, and automotive body controllers requiring stable component supply, long-term lifecycle assurance, and consistent RoHS-compliant manufacturing.
Supply support for CY8C4126AXI-S445 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
Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, offering scalable PSoC platforms with integrated analog/digital flexibility.
The PSoC 4100S Plus product line targets low-power, cost-sensitive applications demanding hardware-accelerated capacitive sensing, deterministic communication (CAN/TTCAN), and reconfigurable analog front-ends - optimized for industrial and consumer edge devices.
FAQ
What development tools are required to program CY8C4126AXI-S445?
PSoC Creator IDE (free, Windows-only) is the official development environment, providing schematic-based design entry, automatic routing, and pre-verified component libraries. Programming uses the MiniProg3 or KitProg2 debugger via SWD interface. Arm GCC toolchain integration is supported for firmware-only workflows after initial hardware configuration.
Does CY8C4126AXI-S445 support secure boot or cryptographic acceleration?
No hardware cryptographic accelerators (AES, SHA, RSA) are integrated. Secure boot is implemented via flash protection bits and debug disable - preventing unauthorized firmware execution and extraction. TRNG provides entropy for software-based key generation, but encryption must be handled in firmware using standard libraries.
Can all 54 GPIOs be used simultaneously for CapSense and analog functions?
Yes - all GPIOs support CapSense and analog input/output, but resource contention applies: only two opamps and one SAR ADC are available. Simultaneous use requires time-multiplexing analog functions or configuring pins for shared roles (e.g., IDAC output + CapSense electrode). Pin mapping must avoid conflicts in the PSoC Creator design phase.
What is the maximum operating temperature for CY8C4126AXI-S445 in industrial applications?
The device is rated for –40 °C to +85 °C ambient temperature (Industrial grade), validated per JEDEC JESD47. Thermal derating is not required up to 85 °C when PCB layout follows recommended copper pour and thermal vias per the PSoC 4100S Plus Hardware Design Considerations (AN88619).
CY8C4126AXI-S445 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-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:
- 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 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-S445 FAQ
1.How can I place an order for CY8C4126AXI-S445 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-S445 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-S445 reliable?
The price and inventory of CY8C4126AXI-S445 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-S445 is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-S445?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-S445 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-S445?
CY8C4126AXI-S445 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-S445 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-S445?
For technical support, including CY8C4126AXI-S445 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-S445 requirements.
6.How does Aetrix verify that CY8C4126AXI-S445 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-S445 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-S445 meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-S445?
All CY8C4126AXI-S445 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-S445, 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-S445 part is unused and in its original packaging.
Return procedure for CY8C4126AXI-S445:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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