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Infineon Technologies CY8C4126AZI-S433
- Part No.:
- CY8C4126AZI-S433
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4126AZI-S433.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
CY8C4126AZI-S433 from Infineon is a programmable 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 64 KB flash, 8 KB SRAM, integrated CAPSENSE™ capacitive sensing, and reconfigurable analog/digital blocks. It supports deep-sleep operation at 2.5 µA, features three SCB serial interfaces (I²C/SPI/UART), and delivers high-noise-immunity touch sensing for human-interface applications.
For engineers reviewing the CY8C4126AZI-S433 datasheet, CY8C4126AZI-S433 pinout, CY8C4126AZI-S433 application, or CY8C4126AZI-S433 equivalent, this device is selected for embedded control systems requiring mixed-signal flexibility, low-power capacitive touch, and field-reprogrammable peripheral routing without hardware redesign.
Technical Context
The CY8C4126AZI-S433 implements a tightly coupled subsystem where the Arm® Cortex®-M0+ core executes firmware while programmable analog blocks (two opamps, 12-bit SAR ADC, dual IDACs) and digital logic (TCPWM, SCB, Smart I/O) operate independently under PSoC™ routing fabric. Its clock system integrates IMO (±2%), ILO (32 kHz), and WCO support for precision timing across sleep/wake cycles.
Capacitive sensing uses sigma-delta modulation with hardware-accelerated SmartSense tuning, achieving >5:1 SNR and water-tolerant operation. GPIOs are fully reconfigurable for analog input, CAPSENSE™ electrode, or digital I/O with programmable drive strength and slew rate-enabling single-chip integration of sensor interface, signal conditioning, and communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time control loops and deterministic interrupt response in resource-constrained designs. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports medium-complexity firmware with fast code execution and data buffering for sensor processing. |
| Analog Peripherals | 12-bit 1-Msps SAR ADC, two rail-to-rail opamps, two low-power comparators, dual IDACs - allows simultaneous analog signal acquisition, conditioning, and capacitive sensing on shared pins. |
| Digital Peripherals | Five 16-bit TCPWM blocks, three reconfigurable SCBs (I²C/SPI/UART), quadrature decoder - provides flexible motor control, serial connectivity, and position feedback without external ICs. |
| Power & Sleep | 1.71–5.5 V operation; Deep Sleep current = 2.5 µA with analog active - sustains battery-powered touch interfaces for months on coin-cell power. |
| Capacitive Sensing | CAPSENSE™ sigma-delta engine with automatic SmartSense tuning and >5:1 SNR - eliminates manual calibration and maintains reliability under moisture or EMI stress. |
| GPIO | Up to 36 programmable pins with configurable drive modes, slew rates, and analog/digital/CAPSENSE™ assignment - reduces BOM count by unifying signal routing and peripheral mapping. |
Pinout & Package
This device is packaged in a 48-lead TQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are fully reconfigurable via firmware-defined routing, enabling dynamic assignment of analog, digital, or CAPSENSE™ roles per pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.71–5.5 V operation; multiple VDD/VSS pairs ensure stable core/analog domain separation and low-noise ADC reference. |
| P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7], P4[0]–P4[3] | Programmable GPIO | Each pin supports CAPSENSE™ electrode, analog input/output, or digital I/O with software-selectable drive strength (0.5–20 mA) and slew rate control. |
| XRES | External reset input | Active-low asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion. |
| SWDCK, SWDIO | Serial Wire Debug interface | Two-pin debug port supporting programming, real-time tracing, and breakpoints without dedicated UART or JTAG pins. |
| XTAL_IN, XTAL_OUT | 32 kHz watch crystal oscillator terminals | Connects to external 32.768 kHz crystal for precise RTC or low-power wake-up timing independent of main oscillator. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable analog blocks | Two opamps operate in comparator, buffer, or high-drive mode-including deep-sleep operation-enabling always-on sensor front-end without wake-up latency. |
| Hardware-accelerated CAPSENSE™ | Sigma-delta modulation with automatic SmartSense tuning achieves >5:1 SNR and tolerates conductive contaminants-reducing firmware overhead and improving field reliability. |
| Flexible serial connectivity | Three SCBs dynamically assign I²C, SPI, or UART functionality at runtime-eliminating fixed-peripheral bottlenecks and simplifying multi-protocol gateway design. |
| Low-power TCPWM | Five 16-bit timer/counter/PWM blocks support center-aligned PWM, quadrature decoding, and comparator-triggered kill signals-ideal for motor control with safety-critical shutdown. |
| Unified GPIO architecture | All 36 pins support analog input, CAPSENSE™ electrode, or digital I/O with programmable drive strength and slew rate-enabling single-layer PCB layout and reduced external components. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
Use Scenario: Capacitive touch buttons and sliders on microwave oven or washing machine control panel exposed to steam and cleaning agents. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ acquisition, LED backlight PWM, and UART communication to main controller. Use Value: SmartSense auto-tuning maintains button responsiveness despite condensation; deep-sleep current <2.5 µA extends battery backup life during standby. |
Use Scenario: Operator panel on PLC-mounted equipment requiring ESD-hardened touch input and RS-485 communication in factory environments. IC Role / Device Role / Timing Role: Standalone HMI controller managing touch UI, local status LEDs, and isolated UART-to-RS485 bridge via SCB and GPIO-driven level shifter. Use Value: Integrated 12-bit SAR ADC monitors panel temperature for derating; programmable slew rates suppress EMI in noisy industrial settings. |
| Medical Patient Monitor Keypad | Smart Thermostat User Interface |
Use Scenario: Glove-compatible touch interface on bedside vital signs monitor requiring high immunity to saline splash and repeated disinfection. IC Role / Device Role / Timing Role: Dedicated CAPSENSE™ processor feeding touch events to host MCU over I²C; operates independently in low-power mode between measurements. Use Value: >5:1 SNR ensures false-touch rejection under wet conditions; dual IDACs enable self-capacitance and mutual-capacitance sensing on same electrodes. |
Use Scenario: Wall-mounted HVAC thermostat with ambient light sensing, temperature measurement, and capacitive up/down controls. IC Role / Device Role / Timing Role: System-on-chip managing CAPSENSE™, thermistor ADC, ambient light ADC (via IDAC-based transimpedance), and LCD segment drive. Use Value: Single-chip integration replaces discrete opamp, comparator, and touch controller; LCD drive capability eliminates external display driver IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4026LQI-S412 | Lower memory (32 KB flash, 4 KB SRAM); no WCO; 28-pin QFN package | Targeted for cost-sensitive, space-constrained designs with basic CAPSENSE™ only-lacks TCPWM flexibility and SCB count for multi-protocol use. | Select when footprint and BOM cost outweigh need for advanced timers or crystal-backed RTC. |
| STM32G031F8P6 | Arm® Cortex®-M0+, 64 KB flash, but no integrated CAPSENSE™ or programmable analog; requires external touch controller and opamp circuitry. | Suitable for general-purpose control where touch is implemented externally or omitted-adds PCB area, component count, and firmware complexity for sensor interface. | Choose only if existing STM32 toolchain familiarity or ecosystem dependencies outweigh integrated analog benefits. |
Compared with CY8C4126AZI-S433, CY8C4026LQI-S412 sacrifices memory, precision timing, and peripheral count for lower cost and size, while STM32G031F8P6 shifts analog and touch responsibility to external components-increasing design effort and reducing noise resilience in touch-sensitive applications.
Availability
CY8C4126AZI-S433 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI interfaces, medical patient monitor keypads, and smart thermostat user interfaces requiring stable component supply and long-term manufacturability.
Supply support for CY8C4126AZI-S433 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 MCUs, and secure embedded solutions, with global R&D and manufacturing infrastructure.
The PSoC™ 4100S product line was designed to deliver field-programmable analog and digital peripherals alongside an Arm® Cortex®-M0+ core-targeting human-interface, sensor-fusion, and low-power embedded control applications where hardware flexibility reduces time-to-market.
FAQ
Does CY8C4126AZI-S433 support USB connectivity?
No, CY8C4126AZI-S433 does not include a USB PHY or USB controller. It provides three reconfigurable serial communication blocks (SCBs) supporting I²C, SPI, and UART only. For USB host or device functionality, an external USB-to-UART bridge IC or migration to a PSoC™ 4 BLE or PSoC™ 6 device is required.
Can the internal opamps drive external loads directly?
Yes-the two continuous-time opamps support high-drive external mode with up to 20 mA output current and rail-to-rail swing. They can directly drive resistive touch overlays, small solenoids, or LED strings without external buffers, provided load impedance stays within specified voltage compliance and thermal limits per the datasheet's CTBm electrical specs.
Is SmartSense tuning available for all CAPSENSE™ configurations?
SmartSense auto-tuning is supported for both self-capacitance and mutual-capacitance CAPSENSE™ sensors implemented using the CSD block. It requires no user calibration code and adapts baseline and sensitivity parameters in real time-but does not apply to the 10-bit CapSense ADC function or non-CSD analog measurement modes.
What debug interfaces are supported during development?
CY8C4126AZI-S433 supports Serial Wire Debug (SWD) via dedicated SWDCK and SWDIO pins. It does not support JTAG. Debugging is fully compatible with Infineon's ModusToolbox™ and legacy PSoC™ Creator IDEs, including flash programming, real-time variable watch, and hardware breakpoints-all using the two-pin SWD interface.
CY8C4126AZI-S433 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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, 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 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-S433 FAQ
1.How can I place an order for CY8C4126AZI-S433 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZI-S433 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-S433 reliable?
The price and inventory of CY8C4126AZI-S433 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZI-S433 is usually 5 days.
3.What payment methods are accepted for CY8C4126AZI-S433?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZI-S433 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZI-S433?
CY8C4126AZI-S433 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZI-S433 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-S433?
For technical support, including CY8C4126AZI-S433 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZI-S433 requirements.
6.How does Aetrix verify that CY8C4126AZI-S433 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZI-S433 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-S433 meets industry standards.
7.What is the process for return or replacement of CY8C4126AZI-S433?
All CY8C4126AZI-S433 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZI-S433, 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-S433 part is unused and in its original packaging.
Return procedure for CY8C4126AZI-S433:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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