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Infineon Technologies CY8C4126AXI-M443T
- Part No.:
- CY8C4126AXI-M443T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4126AXI-M443T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,723
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Product details
Overview
CY8C4126AXI-M443T from Infineon is a PSoC™ 4100M-series programmable system-on-chip integrating an Arm® Cortex®-M0 CPU (24 MHz), 128 kB flash, 16 kB SRAM, and reconfigurable analog/digital peripherals. It supports capacitive sensing (CSD), segment LCD drive, four opamps with Deep Sleep operation, and eight TCPWM blocks - deployed in industrial HMI, sensor nodes, and low-power embedded control systems.
For engineers reviewing the CY8C4126AXI-M443T datasheet, CY8C4126AXI-M443T pinout, CY8C4126AXI-M443T application, or CY8C4126AXI-M443T equivalent, key selection criteria include Deep Sleep current (20 nA Stop Mode), SAR ADC performance (12-bit, 806 Ksps), CAPSENSE™ SNR (>5:1), and GPIO flexibility (up to 55 pins with programmable drive modes).
Technical Context
The device implements a tightly coupled MCU subsystem with DMA engine and automatic routing between programmable analog (opamps, comparators, IDACs) and digital resources (TCPWM, SCBs). Its clock system integrates IMO (24 MHz), ILO (32.768 kHz), and external crystal support for precision timing across operating modes.
Capacitive sensing uses Infineon's proprietary Capacitive Sigma-Delta (CSD) architecture with hardware-accelerated SmartSense tuning, while LCD drive operates directly from GPIO pins with 4-bit per-pin memory retention in Deep Sleep - enabling ultra-low-power display interfaces without external controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0 @ 24 MHz with single-cycle multiply - enables deterministic real-time control and efficient firmware execution. |
| Memory | 128 kB flash + 16 kB SRAM - sufficient for complex firmware with bootloader, communication stacks, and CAPSENSE™ library. |
| ADC | 12-bit SAR ADC @ 806 Ksps - supports high-resolution sensor acquisition with minimal latency in motor feedback or environmental monitoring. |
| Low-Power Modes | 20 nA Stop Mode with GPIO wakeup - extends battery life in always-on sensor endpoints and remote controls. |
| Capacitive Sensing | CSD architecture with >5:1 SNR and water tolerance - delivers robust touch interface performance in humid or wet environments. |
| GPIO Count | Up to 55 programmable pins - supports mixed-signal routing for CAPSENSE™, LCD, analog inputs, and digital I/O in compact designs. |
| Opamps | Four rail-to-rail opamps operable in Deep Sleep - enables continuous analog signal conditioning (e.g., sensor biasing) without waking CPU. |
| SCBs | Four reconfigurable serial blocks (I²C/SPI/UART) - allows concurrent multi-protocol communication (e.g., I²C sensor hub + UART debug + SPI display). |
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 | Core & I/O supply | 1.71–5.5 V input; powers all digital logic, analog blocks, and GPIO drivers - supports direct connection to single Li-ion or 3.3 V/5 V rails. |
| VSS | Digital ground | Primary reference for digital logic and I/O; must be low-impedance and separated from analog ground where noise-sensitive analog circuits are used. |
| XRES | Active-low reset | Asynchronous reset input; internal pull-up ensures reliable startup; compatible with pushbutton or supervisor IC assertion. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug (SWD) interface - enables full programming, debugging, and trace without dedicated JTAG pins. |
| P0[0]–P0[7] | Programmable GPIO | Support CAPSENSE™, LCD segment/common, analog input/output, or digital I/O - configurable drive strength (0.5–20 mA) and slew rate. |
| P1[0]–P1[7] | Programmable GPIO | Same capabilities as Port 0; includes dedicated SCB and TCPWM connections - used for peripheral signal routing and interrupt-capable inputs. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual parameter adjustment and maintains stable touch response across voltage/temperature drift. |
| Deep Sleep analog operation | Opamps and comparators remain active at ≤1 µA total - enables continuous sensor wake-up triggers without CPU intervention. |
| Reconfigurable SCBs | Each of four serial blocks can be independently assigned as I²C master/slave, SPI master/slave, or UART - reduces BOM count and PCB routing complexity. |
| Segment LCD drive | Direct drive on any GPIO with 4-bit memory retention in Deep Sleep - eliminates external LCD controller and preserves display state during low-power sleep. |
| Programmable TCPWM | Eight 16-bit timer/counter/PWM units with center-aligned, edge-aligned, and pseudo-random modulation - supports motor control, LED dimming, and audio generation. |
Applications
| Industrial HMI Panels | Smart Sensor Nodes |
|---|---|
|
Use Scenario: Touch-enabled control panel for HVAC or PLC interface with segmented LCD display. IC Role / Device Role / Timing Role: Main system controller handling CAPSENSE™ touch detection, LCD segment driving, and RS-485 communication via SCB. Use Value: Single-chip integration replaces separate microcontroller, touch controller, and LCD driver - reducing component count and board area by >40%. |
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality. IC Role / Device Role / Timing Role: Low-power data acquisition node using SAR ADC, opamp-based sensor signal conditioning, and Deep Sleep wakeup on threshold violation. Use Value: 20 nA Stop Mode extends 2-AA battery life to >5 years - validated under EN 60730 Class B functional safety requirements. |
| Motor Control Interfaces | Medical Wearables |
|
Use Scenario: Brushless DC motor control module with Hall-effect feedback and overcurrent protection. IC Role / Device Role / Timing Role: Real-time PWM generation (TCPWM), analog current sensing (opamp + ADC), and comparator-based fault shutdown. Use Value: Hardware-triggered "Kill" signals from comparators disable PWM outputs within <100 ns - meeting IEC 61800-5-2 functional safety response time. |
Use Scenario: Clinical-grade pulse oximeter with optical sensor front-end and OLED/LCD display. IC Role / Device Role / Timing Role: Analog front-end (IDAC-driven photodiode bias, opamp transimpedance gain), CAPSENSE™ button interface, and SPI-driven display. Use Value: Integrated IDACs and opamps eliminate 6 discrete analog components - improving signal integrity and reducing EMI susceptibility in sensitive bio-signal paths. |
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-M445T | Higher flash (256 kB) and SRAM (32 kB); same package and peripheral set - no change in pinout or power profile. | Better suited for firmware with BLE stack or advanced CAPSENSE™ gesture algorithms requiring larger code/data space. | Select when future firmware expansion or dual-application partitioning (e.g., secure boot + main app) is required. |
| STM32L432KCU6 | Arm Cortex-M4F core (80 MHz), 256 kB flash, 64 kB SRAM, but lacks integrated CAPSENSE™, programmable analog, and LCD drive. | Requires external components for touch, analog signal chain, and display - increases BOM cost and layout complexity. | Prefer only if floating-point math, DSP acceleration, or existing STM32 ecosystem alignment outweighs PSoC™ integration benefits. |
Compared with CY8C4127AZI-M445T, this part trades memory headroom for lower unit cost and identical footprint; versus STM32L432KCU6, it delivers higher analog integration and lower system-level power but less raw CPU throughput - making it optimal for resource-constrained, sensor-rich HMI designs.
Availability
CY8C4126AXI-M443T is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, motor control interfaces, and medical wearables requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY8C4126AXI-M443T 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 leader specializing in power management, automotive MCUs, and programmable mixed-signal solutions with strong industrial and automotive qualifications.
This device belongs to the PSoC™ 4100M product line - designed specifically for cost-sensitive, low-power embedded systems needing configurable analog/digital integration without external support chips.
FAQ
Does CY8C4126AXI-M443T support USB connectivity?
No. This device does not include a USB PHY or USB controller. Communication is limited to its four reconfigurable SCBs (I²C, SPI, UART) and SWD debug interface. For USB host/device functionality, external bridge ICs (e.g., CP2102N) or migration to PSoC™ 4 BLE/4000S families is required.
What development tools are required to program CY8C4126AXI-M443T?
PSoC™ Creator IDE (legacy) or ModusToolbox™ (current) is required for schematic-based design and firmware generation. Programming uses standard SWD via KitProg3 or MiniProg4 debug probes - no special programmers or license fees are needed for basic development and production flashing.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No. The 12-bit SAR ADC has a single sample-and-hold circuit and sequential conversion architecture. It supports up to 16-channel scanning with configurable sequencing and trigger sources (e.g., TCPWM, SCB), but true simultaneous sampling requires external analog multiplexers or a different ADC architecture.
Is the CAPSENSE™ implementation certified for IEC 61000-4-6 conducted immunity?
Yes. Infineon provides CAPSENSE™ design guides and layout recommendations validated to meet IEC 61000-4-6 Level 3 (10 V/m, 150 kHz–80 MHz) when implemented per AN91820 and AN92607 guidelines - including shielded traces, guard rings, and proper grounding practices.
CY8C4126AXI-M443T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- Packaging:
- Tape & Reel (TR)
- 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-M443T FAQ
1.How can I place an order for CY8C4126AXI-M443T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AXI-M443T 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-M443T reliable?
The price and inventory of CY8C4126AXI-M443T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AXI-M443T is usually 5 days.
3.What payment methods are accepted for CY8C4126AXI-M443T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AXI-M443T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AXI-M443T?
CY8C4126AXI-M443T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AXI-M443T 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-M443T?
For technical support, including CY8C4126AXI-M443T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AXI-M443T requirements.
6.How does Aetrix verify that CY8C4126AXI-M443T is sourced from the original manufacturer or authorized distributors?
All CY8C4126AXI-M443T 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-M443T meets industry standards.
7.What is the process for return or replacement of CY8C4126AXI-M443T?
All CY8C4126AXI-M443T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AXI-M443T, 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-M443T part is unused and in its original packaging.
Return procedure for CY8C4126AXI-M443T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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