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Infineon Technologies CY8C4126AXI-M445
- Part No.:
- CY8C4126AXI-M445
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY8C4126AXI-M445.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
CY8C4126AXI-M445 from Infineon is a PSoC™ 4100M programmable system-on-chip featuring a 24-MHz Arm® Cortex®-M0 CPU, 128 kB flash, 16 kB SRAM, and integrated programmable analog (4 opamps, 2 comparators, 12-bit SAR ADC @ 806 Ksps) and digital peripherals (8 TCPWM blocks, 4 reconfigurable SCBs). It supports capacitive sensing with SmartSense tuning and operates from 1.71–5.5 V across –40°C to +105°C for industrial HMI and sensor interface applications.
For engineers reviewing the CY8C4126AXI-M445 datasheet, CY8C4126AXI-M445 pinout, CY8C4126AXI-M445 application, or CY8C4126AXI-M445 equivalent, key selection criteria include Deep Sleep current (20 nA), CAPSENSE™ SNR (>5:1), LCD drive capability in Deep Sleep, and reconfigurable SCB I²C/SPI/UART functionality.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0 core with fully programmable analog and digital subsystems routed via automatic interconnect fabric. Its analog resources include four rail-to-rail opamps supporting comparator mode and ADC input buffering, plus two low-power comparators active in Deep Sleep mode.
Digital timing is managed by eight independent 16-bit TCPWM blocks supporting center-aligned PWM and comparator-triggered kill signals; serial communication uses four SCBs that can be dynamically configured as I²C, SPI, or UART with hardware FIFO and DMA support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0 at 24 MHz with single-cycle multiply - enables deterministic real-time control without external math acceleration. |
| Flash / SRAM | 128 kB flash with Read Accelerator + 16 kB SRAM - supports complex firmware with fast instruction fetch and data buffering for sensor fusion. |
| ADC Performance | 12-bit SAR ADC at 806 Ksps - delivers high-speed sampling for multi-channel analog monitoring with <1 µs conversion time. |
| Low-Power Modes | 20 nA Stop Mode with GPIO wakeup - allows battery-powered devices to maintain years of operation on coin-cell energy budgets. |
| CAPSENSE™ | Capacitive Sigma-Delta (CSD) with >5:1 SNR and water tolerance - enables robust touch interfaces in humid or wet environments without shielding. |
| LCD Drive | Segment LCD drive on all GPIO pins with 4-bit memory per pin in Deep Sleep - permits ultra-low-power display updates without CPU intervention. |
| GPIO Count | Up to 55 programmable GPIOs - supports mixed-signal routing for custom HMI, sensor aggregation, and motor control I/O consolidation. |
Pinout & Package
Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, industrial temperature grade (–40°C to +105°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 1.71–5.5 V; powers digital core, analog blocks, and I/O banks - enables single-supply operation across wide voltage ranges. |
| VSS | Digital ground reference | Common return path for digital logic and internal regulators - must be low-impedance and separated from analog ground if precision ADC use required. |
| XRES | External reset input | Active-low asynchronous reset pin; debounced internally - allows reliable power-on and fault recovery without external RC network. |
| SWDIO / SWCLK | ARM Serial Wire Debug interface | Two-pin debug port supporting programming, real-time trace, and breakpoints - eliminates need for JTAG header space and simplifies production programming. |
| P0[0]–P0[7] | Programmable GPIO bank 0 | Support CAPSENSE™, analog input/output, LCD segment/common, or digital I/O - configurable per-pin drive strength, slew rate, and pull-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual parameter adjustment and ensures consistent touch performance across manufacturing variance and environmental drift. |
| Reconfigurable SCBs | Four serial blocks independently assignable as I²C master/slave, SPI master/slave, or UART - reduces BOM count and PCB footprint versus discrete protocol ICs. |
| Deep Sleep analog operation | Opamps and comparators remain functional at 20 nA system current - enables continuous sensor wake-up detection without full MCU activation. |
| Programmable TCPWM kill input | Comparator output directly triggers PWM shutdown within one clock cycle - meets functional safety requirements for motor overcurrent protection. |
| On-chip voltage reference | Internal 1.024 V reference with ±1% accuracy over temperature - removes need for external precision reference in ADC-based measurement systems. |
Applications
| Industrial HMI Panel | Capacitive Touch Remote Control |
|---|---|
|
Use Scenario: Wall-mounted control panel for HVAC or lighting with segmented LCD and touch buttons. IC Role / Device Role / Timing Role: System controller managing CAPSENSE™ input, LCD segment drive, and RS-485 communication via SCB. Use Value: Single-chip integration replaces MCU + touch controller + display driver, reducing bill-of-materials and enabling Deep Sleep display updates at <1 µA. |
Use Scenario: Battery-powered remote with water-resistant touch keys and LED feedback. IC Role / Device Role / Timing Role: Capacitive sensing hub with SmartSense tuning, LED PWM dimming via TCPWM, and BLE interface timing coordination. Use Value: >5:1 SNR and automatic water rejection allow reliable operation in kitchen/bathroom environments without mechanical buttons or seals. |
| Smart Sensor Node | Motor Control Interface |
|
Use Scenario: Wireless environmental sensor node measuring temperature, humidity, and ambient light. IC Role / Device Role / Timing Role: Analog front-end (opamp-buffered thermistor, ADC, IDAC for bridge excitation) and low-power scheduler. Use Value: 20 nA Stop Mode with GPIO wakeup extends coin-cell life to >5 years while maintaining sub-100 ms response to sensor events. |
Use Scenario: Brushless DC motor driver board requiring overcurrent protection and commutation timing. IC Role / Device Role / Timing Role: Fault monitor using comparator-triggered TCPWM kill signal and synchronized PWM generation for gate drivers. Use Value: Sub-microsecond kill latency prevents MOSFET shoot-through during phase current faults, meeting IEC 61800-5-2 functional safety requirements. |
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-M445 | 128 kB flash, 16 kB SRAM, same package but with USBFS block and enhanced clocking - adds USB 2.0 device interface capability. | Required when host connectivity (e.g., USB HID keyboard/mouse emulation) is needed alongside CAPSENSE™ and LCD. | Select for designs needing certified USB enumeration without external PHY; otherwise identical peripheral configuration and toolchain compatibility. |
| CY8C4026LQI-S423 | 32 kB flash, 4 kB SRAM, 48-pin QFN, no LCD drive - lower cost, smaller footprint, reduced analog resources (2 opamps, 1 comparator). | Suitable for simple touch-only or sensor-only applications without display or high-channel-count analog acquisition. | Choose for cost-sensitive, space-constrained designs where full PSoC™ 4100M feature set is unnecessary and USB/LCD are omitted. |
Compared with CY8C4126AXI-M445, CY8C4127AZI-M445 adds USBFS at no SRAM/flash penalty but increases BOM complexity; CY8C4026LQI-S423 trades analog/digital resources and LCD support for lower unit cost and smaller package - both retain PSoC™ Creator compatibility and CAPSENSE™ SmartSense.
Availability
CY8C4126AXI-M445 is available at Aetrix Electronics and suitable for industrial HMI panels, capacitive touch remotes, smart sensor nodes, and motor control interfaces requiring stable component supply across extended temperature and long product lifecycles.
Supply support for CY8C4126AXI-M445 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 programmable mixed-signal solutions with global manufacturing and quality certification (IATF 16949, ISO 9001).
This part belongs to the PSoC™ 4100M family - designed for cost-effective, flexible embedded control in industrial and consumer applications where analog/digital reconfigurability, ultra-low-power operation, and rapid prototyping are critical.
FAQ
Does CY8C4126AXI-M445 support USB communication?
No. CY8C4126AXI-M445 lacks a USB physical layer (PHY) and USBFS block. It supports only I²C, SPI, and UART through its four SCBs. For USB device functionality, select CY8C4127AZI-M445, which integrates USBFS and maintains identical CPU, memory, and analog specifications.
What is the maximum operating frequency of the internal main oscillator (IMO)?
The internal main oscillator (IMO) is factory-trimmed to 24 MHz with ±2% accuracy over temperature and voltage. It serves as the default clock source for the Cortex®-M0 core and can be divided or multiplied via the PLL to generate precise peripheral clocks up to 48 MHz for high-speed SCB or ADC operation.
Can all GPIO pins drive LCD segments in Deep Sleep mode?
Yes. All 55 GPIOs support LCD segment or common drive, and the LCD controller retains state and updates segments autonomously in Deep Sleep mode using its dedicated 4-bit memory per pin - enabling static or scrolling text display at <1 µA total current without waking the CPU.
Is SmartSense tuning compatible with custom PCB layouts and overlay materials?
Yes. SmartSense automatically adjusts CSD parameters (IDAC current, scan resolution, averaging) based on raw sensor capacitance and noise floor measurements - it adapts to variations in trace geometry, overlay thickness (up to 10 mm glass), and environmental conditions without requiring layout redesign or firmware recalibration.
CY8C4126AXI-M445 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-LQFP
- Series:
- PSOC™ 4 CY8C41xx - M
- 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, LVD, POR, PWM, WDT
- Number of I/O:
- 51
- 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 16x12b SAR; 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126AXI-M445 FAQ
1.How can I place an order for CY8C4126AXI-M445 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-M445 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-M445 reliable?
The price and inventory of CY8C4126AXI-M445 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-M445 is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-M445?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-M445 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-M445?
CY8C4126AXI-M445 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-M445 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-M445?
For technical support, including CY8C4126AXI-M445 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-M445 requirements.
6.How does Aetrix verify that CY8C4126AXI-M445 is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-M445 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-M445 meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-M445?
All CY8C4126AXI-M445 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-M445, 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-M445 part is unused and in its original packaging.
Return procedure for CY8C4126AXI-M445:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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