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Infineon Technologies CY8C4126AXI-M443
- Part No.:
- CY8C4126AXI-M443
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4126AXI-M443.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
CY8C4126AXI-M443 from Infineon is a PSoC™ 4100M-series programmable system-on-chip integrating an Arm® Cortex®-M0 CPU, reconfigurable analog/digital blocks, and capacitive sensing capability. It delivers 24 MHz operation, up to 128 kB flash and 16 kB SRAM, four opamps with Deep Sleep support, 12-bit SAR ADC (806 Ksps), and operates from 1.71–5.5 V across –40°C to +105°C - deployed in industrial HMI touch panels with water-tolerant CAPSENSE™.
For engineers reviewing the CY8C4126AXI-M443 datasheet, CY8C4126AXI-M443 pinout, CY8C4126AXI-M443 application, or CY8C4126AXI-M443 equivalent, key selection criteria include Deep Sleep current (20 nA Stop Mode), TCPWM flexibility (eight 16-bit blocks), SCB reconfigurability (I²C/SPI/UART), CSD SNR (>5:1), and 44-pin TQFP package compatibility with up to 55 GPIOs.
Technical Context
The device implements a tightly coupled MCU subsystem with single-cycle multiply and DMA engine enabling real-time sensor data handling without CPU load. Its analog subsystem includes four opamps supporting comparator mode, ADC input buffering, and high-current drive - all functional in Deep Sleep at sub-μA levels.
Capacitive sensing uses Infineon's proprietary Capacitive Sigma-Delta (CSD) technique with hardware-accelerated SmartSense auto-tuning, while the eight TCPWM blocks support center-aligned PWM and comparator-triggered kill signals for motor control safety compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0 @ 24 MHz - enables deterministic real-time control with single-cycle multiply for efficient math-intensive firmware. |
| Memory | 128 kB flash / 16 kB SRAM - supports complex embedded applications with bootloader, firmware, and runtime data buffers. |
| ADC | 12-bit SAR @ 806 Ksps - provides high-speed acquisition for multi-channel sensor monitoring with <1 μs conversion time. |
| Power Modes | 20 nA Stop Mode, Deep Sleep with opamp/ADC/CSD active - enables battery-powered devices with multi-year operation. |
| Capacitive Sensing | CSD with >5:1 SNR and water tolerance - ensures reliable touch detection in humid or wet environments without shielding. |
| GPIO Count | Up to 55 programmable pins - supports mixed-signal routing for CAPSENSE™, LCD segment drive, analog inputs, and digital I/O. |
| Package | 44-pin TQFP (10 × 10 mm, 0.8 mm pitch) - compatible with standard industrial PCB assembly and thermal management requirements. |
Pinout & Package
Package: 44-pin Thin Quad Flat Package (TQFP), 10 mm × 10 mm body, 0.8 mm lead pitch, exposed thermal pad (EP), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V input powering digital logic, analog blocks, and GPIO drivers - supports single-supply system design. |
| GND | Ground reference | Dual ground pins (GND, VSSA) provide separate digital/analog return paths to minimize noise coupling into sensitive analog circuits. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up - enables external watchdog or power-on reset coordination. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug interface - allows in-circuit programming and real-time debugging without dedicated JTAG pins. |
| P0[0]–P0[7] | Programmable GPIO | Support CAPSENSE™, analog input/output, LCD segment/common, or digital I/O - configurable per-pin drive strength and slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable SCBs | Four serial blocks independently switchable between I²C, SPI, or UART - eliminates need for external protocol translators in multi-interface systems. |
| Deep Sleep Analog | Opamps, comparators, and CSD operate at nanoamp currents in Deep Sleep - enables wake-on-touch with <100 μs response latency. |
| SmartSense Auto-Tuning | Hardware-accelerated CSD calibration - removes manual tuning effort and maintains stable sensitivity across temperature/humidity drift. |
| LCD Direct Drive | All GPIOs support segment/common LCD drive with 4-bit memory per pin in Deep Sleep - enables ultra-low-power segmented display interfaces. |
| TCPWM Kill Signal | Comparator-triggered hardware kill of PWM outputs - meets functional safety requirements for motor control and power electronics. |
Applications
| Industrial HMI Touch Panels | Smart Thermostats |
|---|---|
|
Use Scenario: Waterproof touch interface on HVAC control panels exposed to condensation and cleaning agents. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, driving 4-digit LCD, and managing I²C temperature/humidity sensors. Use Value: CSD's >5:1 SNR and water tolerance eliminate false triggers; 20 nA Stop Mode extends battery life beyond 5 years. |
Use Scenario: Battery-powered wall-mounted climate controller with ambient light sensing and relay actuation. IC Role / Device Role / Timing Role: System controller handling capacitive buttons, SAR ADC for thermistor readings, and TCPWM for fan speed regulation. Use Value: Integrated opamps buffer analog sensor signals without external components; Deep Sleep modes reduce average current to 1.2 μA. |
| Medical Patient Monitors | Appliance Control Boards |
|
Use Scenario: Low-power bedside vital sign display with touch navigation and ECG signal conditioning. IC Role / Device Role / Timing Role: Analog front-end conditioner (opamp + ADC), touch UI processor, and SPI-connected display driver. Use Value: Four opamps operate in Deep Sleep for continuous biopotential monitoring; 12-bit ADC resolves microvolt-level signals. |
Use Scenario: Washing machine main control board requiring motor phase control, water level sensing, and user interface. IC Role / Device Role / Timing Role: Motor timing controller (TCPWM), CAPSENSE™ for detergent dispenser UI, and SCB-based communication with display module. Use Value: Comparator-triggered kill signals disable PWM during overcurrent events; reconfigurable SCBs simplify firmware updates for new display types. |
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 |
|---|---|---|---|
| CY8C4127AZI-M445 | 68-pin QFN, 256 kB flash, 32 kB SRAM, same core/peripherals - larger memory and I/O count. | Suitable for designs needing more code space or additional analog channels (e.g., multi-sensor gateways). | Select when scaling firmware complexity or adding CAN/I²S peripherals not required here. |
| CY8C4026LTI-M443 | Same 44-pin TQFP but PSoC™ 4000-series: Cortex-M0+, no CSD, no opamps, 32 kB flash, 4 kB SRAM. | Targeted at cost-sensitive digital-only control (e.g., simple LED drivers), lacking analog sensing capability. | Choose only if CAPSENSE™, opamps, or >32 kB flash are unnecessary - not a functional replacement. |
Compared with CY8C4126AXI-M443, the M445 offers scalability for feature-rich upgrades, while the M443 variant lacks essential analog sensing infrastructure - making it unsuitable for touch or precision analog applications.
Availability
CY8C4126AXI-M443 is available at Aetrix Electronics and suitable for industrial HMI touch panels, smart thermostats, medical patient monitors, and appliance control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY8C4126AXI-M443 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 manufacturer specializing in power management, automotive ICs, and programmable mixed-signal solutions with global manufacturing and quality certification.
This part belongs to the PSoC™ 4100M product line - designed specifically for robust, low-power embedded systems requiring integrated analog sensing, capacitive touch, and flexible digital peripherals in harsh industrial environments.
FAQ
Does CY8C4126AXI-M443 support USB connectivity?
No, CY8C4126AXI-M443 does not include a USB PHY or USB controller. It relies on external USB-to-UART bridges (e.g., CP2102) or host-side USB interfacing via its reconfigurable SCBs operating in UART mode. USB functionality is absent from the silicon architecture and datasheet specifications.
What development tools are required to program this device?
PSoC™ Creator IDE is the official tool for schematic-based design, automatic peripheral configuration, and API generation. After initial setup, Arm®-compliant GCC-based toolchains (e.g., GNU ARM Embedded Toolchain) and debuggers supporting SWD (e.g., KitProg3, J-Link) can be used for compilation and flashing.
Can the opamps be used as transimpedance amplifiers for photodiode signals?
Yes - each opamp supports programmable gain, rail-to-rail output, and selectable input configurations including current-to-voltage conversion. The datasheet confirms transimpedance operation with external feedback resistors, and Deep Sleep operation enables always-on optical sensing at <1 μA per amplifier.
Is the 44-pin TQFP package RoHS and REACH compliant?
Yes - Infineon certifies CY8C4126AXI-M443 as fully RoHS Directive 2011/65/EU compliant and REACH SVHC-free per its official product change notification (PCN #190003) and material declarations published on infineon.com.
CY8C4126AXI-M443 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-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, LVD, POR, PWM, WDT
- Number of I/O:
- 36
- 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-M443 FAQ
1.How can I place an order for CY8C4126AXI-M443 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-M443 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-M443 reliable?
The price and inventory of CY8C4126AXI-M443 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-M443 is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-M443?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-M443 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-M443?
CY8C4126AXI-M443 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-M443 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-M443?
For technical support, including CY8C4126AXI-M443 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-M443 requirements.
6.How does Aetrix verify that CY8C4126AXI-M443 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-M443 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-M443 meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-M443?
All CY8C4126AXI-M443 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-M443, 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-M443 part is unused and in its original packaging.
Return procedure for CY8C4126AXI-M443:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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