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Infineon Technologies CY8C4126AZI-S445
- Part No.:
- CY8C4126AZI-S445
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY8C4126AZI-S445.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
CY8C4126AZI-S445 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, CAN 2.0B interface, and programmable analog/digital blocks. It supports deep-sleep operation at 2.5 µA with active analog, targets touch-enabled industrial HMI and motor control edge nodes.
For engineers reviewing the CY8C4126AZI-S445 datasheet, CY8C4126AZI-S445 pinout, CY8C4126AZI-S445 application, or CY8C4126AZI-S445 equivalent, key selection criteria include its 44-pin TQFP package, 1.71–5.5 V supply range, 12-bit SAR ADC with 1 Msps, CAN 2.0B compliance, and CapSense sigma-delta architecture with >5:1 SNR.
Technical Context
The device integrates an Arm Cortex-M0+ core with tightly coupled flash accelerator and 8-channel DMA, enabling deterministic real-time execution in resource-constrained embedded systems. Its clock system combines IMO (±2%), ILO, WCO, ECO (4–33 MHz), and PLL to generate stable 48-MHz HFCLK with glitchless switching.
Analog subsystem includes two opamps operable in Deep Sleep, a 12-bit SAR ADC with channel sequencer and averaging, two IDACs, and two low-power comparators - all configurable via PSoC Creator. Digital resources comprise five reconfigurable SCBs (I²C/SPI/UART), eight TCPWM blocks with quadrature decode and kill-signal triggering, and programmable logic for Boolean operations on GPIOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz, single-cycle multiply - enables deterministic real-time firmware with minimal latency for motor control loops. |
| Flash / SRAM | 128 KB flash with Read Accelerator; 16 KB zero-wait-state SRAM - supports complex CapSense + communication stacks without external memory. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended, channel sequencer with signal averaging - delivers high-resolution sensor acquisition with noise suppression in noisy industrial environments. |
| CapSense | Sigma-Delta (CSD) architecture, >5:1 SNR, SmartSense™ auto-tuning - achieves robust water-tolerant touch detection on up to 54 GPIOs without manual calibration. |
| CAN Interface | CAN 2.0B compliant, Time-Triggered CAN (TTCAN) support - enables deterministic communication in automotive body electronics and industrial fieldbus nodes. |
| Power Modes | Deep Sleep: 2.5 µA with opamps active; Active: 120 µA/MHz - allows battery-powered devices to operate for years on coin cells while retaining analog monitoring capability. |
| GPIO | Up to 54 programmable pins in 44-pin TQFP; all support CapSense, analog, digital, or LCD segment drive - eliminates need for external touch controllers or level shifters in compact HMI designs. |
Pinout & Package
Package: 44-pin TQFP (0.8 mm pitch), RoHS-compliant, surface-mount, 10 mm × 10 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 1.71–5.5 V; powers digital core, analog blocks, and I/O; requires local 100 nF decoupling. |
| VSS | Ground reference | Digital and analog ground common point; must be connected to low-impedance PCB plane. |
| P0[0]–P0[7] | Programmable GPIO bank 0 | Support CapSense, analog input/output, SCB, TCPWM, or LCD drive; configurable slew rate and drive strength. |
| P1[0]–P1[7] | Programmable GPIO bank 1 | Same functionality as P0; includes dedicated CAN_TX and CAN_RX pins on P1[2]/P1[3]. |
| SWDCK / SWDIO | Serial Wire Debug interface | Two-pin debug port for programming and full-chip debugging; enabled by default, disableable via firmware for security. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up; compatible with pushbutton or supervisor IC reset signals. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense Sigma-Delta (CSD) | Enables >5:1 SNR touch performance with water tolerance - reduces false triggers in wet or condensing environments without shield layers. |
| SmartSense™ Auto-Tuning | Hardware-accelerated real-time capacitance compensation - eliminates factory calibration and field recalibration for production scalability. |
| Programmable Analog Blocks | Two opamps + two comparators operational in Deep Sleep - allows continuous analog monitoring (e.g., battery voltage, temperature) while MCU core remains powered off. |
| CAN 2.0B + TTCAN | Integrated CAN controller with time-triggered scheduling - supports deterministic message timing for safety-critical motor feedback and diagnostics. |
| PSoC Creator Integration | Drag-and-drop schematic design with automatic analog/digital routing - reduces firmware/hardware co-design cycle from weeks to hours for mixed-signal applications. |
Applications
| Industrial HMI Panels | Automotive Body Control Modules |
|---|---|
Use Scenario: Touch-enabled operator interface on factory floor equipment with splash-prone environment. IC Role / Device Role / Timing Role: Primary system controller executing CapSense firmware, CAN messaging, and real-time status display logic. Use Value: Eliminates external touch controller and discrete CAN transceiver, reducing BOM count and PCB area by 30% versus multi-chip solution. | Use Scenario: Door module managing window lift, mirror fold, and interior lighting with fault reporting. IC Role / Device Role / Timing Role: CAN node endpoint with synchronized actuator control and diagnostic logging via TTCAN time slots. Use Value: Achieves <100 µs jitter on window position feedback using TCPWM quadrature decode and comparator-triggered kill signals. |
| Smart Home Sensor Hubs | Medical Portable Devices |
Use Scenario: Battery-powered air quality monitor with capacitive buttons and BLE gateway connectivity. IC Role / Device Role / Timing Role: Low-power sensor aggregator with Deep Sleep wake-on-capacitance-change and SAR ADC sampling. Use Value: Extends coin-cell life to 3+ years via 2.5 µA Deep Sleep current while maintaining responsive touch and accurate CO₂/VOC readings. | Use Scenario: Handheld patient monitor with ECG front-end and touch UI for parameter configuration. IC Role / Device Role / Timing Role: Analog signal conditioner (opamp buffering), ADC digitizer, and CapSense UI controller in single chip. Use Value: Meets IEC 60601-1 leakage current limits through programmable GPIO drive strength and isolated analog domain partitioning. |
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 KB flash, 8 KB SRAM, 48-pin TQFP - lower memory density and smaller I/O count. | Suitable for cost-sensitive touch-only applications without CAN or complex firmware. | Select when BOM cost reduction outweighs need for CAN, larger code space, or 54 GPIOs. |
| STM32G071KBT6 | Arm Cortex-M0+, 128 KB flash, but no integrated CapSense or programmable analog; requires external touch controller and opamp circuitry. | Applicable where CAN + basic touch is sufficient and analog flexibility is not required. | Choose only if existing STM32 toolchain familiarity and ecosystem outweigh CapSense integration benefits. |
Compared with CY8C4126AZI-S445, CY8C4127AZI-S433 offers reduced memory and I/O for simpler designs, while STM32G071KBT6 lacks native capacitive sensing and programmable analog - requiring additional components and PCB area to match equivalent functionality.
Availability
CY8C4126AZI-S445 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive body control modules, and smart home sensor hubs requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4126AZI-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
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.
CY8C4126AZI-S445 belongs to the PSoC 4100S Plus product line, designed specifically for ultra-low-power, touch-enabled embedded systems requiring integrated analog, digital, and communication peripherals in a single chip.
FAQ
Does CY8C4126AZI-S445 support USB connectivity?
No. This device does not include a USB PHY or USB controller. Communication interfaces are limited to five SCBs supporting I²C, SPI, or UART protocols, plus CAN 2.0B. USB functionality requires external bridge ICs or migration to PSoC 4 BLE or PSoC 6 families with native USB support.
What debug interface does CY8C4126AZI-S445 use?
It uses the standard Arm Serial Wire Debug (SWD) interface with two pins: SWDIO and SWDCK. Full debug-on-chip capability is supported via PSoC Creator IDE, including breakpoints, watchpoints, and real-time register inspection. Debug features can be permanently disabled in firmware for security.
Can the CapSense block operate during Deep Sleep mode?
Yes. The CapSense CSD block remains fully functional in Deep Sleep mode with 2.5 µA system current. It can detect touch events and generate interrupts to wake the CPU, enabling ultra-low-power wake-on-touch behavior without external components.
Is CY8C4126AZI-S445 qualified for automotive applications?
No. While it supports CAN 2.0B and operates across –40°C to +85°C, CY8C4126AZI-S445 is not AEC-Q100 qualified. For automotive use, Infineon recommends the PSoC 4100S Plus AEC-Q100 qualified variants such as CY8C4126LTI-S433 (automotive-grade 48-pin TQFP).
CY8C4126AZI-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:
CY8C4126AZI-S445 FAQ
1.How can I place an order for CY8C4126AZI-S445 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZI-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 CY8C4126AZI-S445 reliable?
The price and inventory of CY8C4126AZI-S445 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZI-S445 is usually 5 days.
3.What payment methods are accepted for CY8C4126AZI-S445?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZI-S445 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZI-S445?
CY8C4126AZI-S445 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZI-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 CY8C4126AZI-S445?
For technical support, including CY8C4126AZI-S445 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZI-S445 requirements.
6.How does Aetrix verify that CY8C4126AZI-S445 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZI-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 CY8C4126AZI-S445 meets industry standards.
7.What is the process for return or replacement of CY8C4126AZI-S445?
All CY8C4126AZI-S445 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZI-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 CY8C4126AZI-S445 part is unused and in its original packaging.
Return procedure for CY8C4126AZI-S445:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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