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Infineon Technologies CY8C4126AZI-S433T
- Part No.:
- CY8C4126AZI-S433T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4126AZI-S433T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,495
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Product details
Overview
CY8C4126AZI-S433T 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, 12-bit 1-Msps SAR ADC, and three reconfigurable serial communication blocks (I²C/SPI/UART). It supports deep-sleep operation at 2.5 µA and delivers best-in-class SNR (>5:1) for water-tolerant touch interfaces in industrial HMI and consumer control panels.
For engineers reviewing the CY8C4126AZI-S433T datasheet, CY8C4126AZI-S433T pinout, CY8C4126AZI-S433T application, or CY8C4126AZI-S433T equivalent, key selection criteria include deep-sleep current, CAPSENSE™ sigma-delta performance, TCPWM kill-signal triggering for motor safety, and GPIO flexibility across 36 pins with analog/digital/CAPSENSE™ reconfiguration capability.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (two opamps, two comparators, 12-bit SAR ADC, IDACs) and digital (TCPWM, SCB, PLD) subsystems. Its CAPSENSE™ block uses sigma-delta modulation with hardware SmartSense tuning to achieve >5:1 SNR and robust water tolerance without firmware calibration.
Clocking includes ±2% IMO, 32 kHz ILO, and WCO support; power management enables Deep Sleep mode with active analog blocks and 2.5 µA system current. All 36 GPIOs support configurable drive modes, slew rates, and dual-role assignment (e.g., analog input + CAPSENSE™ sensor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time control loop execution within 20.8 ns per instruction cycle. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports complex firmware with bootloader, CAPSENSE™ library, and communication stacks. |
| ADC | 12-bit SAR ADC @ 1 Msps with differential/single-ended modes and channel sequencer - allows synchronized multi-sensor acquisition in motor control or environmental monitoring. |
| CAPSENSE™ | Sigma-delta modulator with >5:1 SNR and automatic SmartSense tuning - eliminates manual calibration and sustains reliable touch detection under moisture or EMI stress. |
| Low-power Mode | Deep Sleep current = 2.5 µA with operational analog blocks - enables battery-powered devices with multi-year runtime and wake-on-touch capability. |
| Serial Interfaces | Three SCBs supporting run-time reconfigurable I²C/SPI/UART - permits dynamic peripheral assignment without hardware redesign or pin remapping. |
| TCPWM Blocks | Five 16-bit Timer/Counter/PWM units with center-aligned, edge, and pseudo-random modes - supports precise motor phase control and LED dimming with comparator-triggered kill signals. |
Pinout & Package
Package: 44-lead TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | General-purpose GPIO / CAPSENSE™ sensor / Analog input | Configurable as touch electrode, ADC input, or digital I/O; supports high-drive analog output when assigned to CTB opamp. |
| P1[0]–P1[7] | General-purpose GPIO / SCB interface / TCPWM output | Can route UART TX/RX, SPI MISO/MOSI, or PWM signals; supports slew-rate control for EMI reduction. |
| P2[0]–P2[7] | General-purpose GPIO / LCD segment driver / IDAC output | Drives up to 44-segment LCD directly; IDACs enable current-source-based proximity or capacitance measurement on any pin. |
| VDD, VSS | Power supply / Ground | Supports 1.71–5.5 V operation; separate analog/digital ground pins ensure noise isolation for precision ADC and CAPSENSE™. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external push-button or supervisor IC assertion. |
| SWDCK / SWDIO | Debug interface | Two-pin Serial Wire Debug interface for programming and real-time trace; operates during all power modes except Hibernate. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | Two continuous-time opamps with high-bandwidth internal drive and high-drive external mode - enables sensor signal conditioning and active filtering without external components. |
| Capacitive Sensing Engine | Sigma-delta CAPSENSE™ with hardware-accelerated SmartSense tuning - reduces firmware development time by eliminating manual parameter optimization for varying PCB stack-ups. |
| Reconfigurable Digital Logic | Programmable logic blocks (PLD) performing Boolean operations on port inputs/outputs - implements glue logic, state machines, or interrupt pre-processing without CPU intervention. |
| Flexible Clock System | Integrated ±2% IMO, 32 kHz ILO, and WCO support - allows accurate RTC operation with external crystal while maintaining low-power timing for wake-up events. |
| GPIO Flexibility | All 36 pins support CAPSENSE™, analog, or digital functions with programmable drive strength and slew rate - simplifies PCB layout and enables last-minute feature changes via firmware. |
Applications
| Industrial HMI Panels | Smart Home Appliances |
|---|---|
Use Scenario: Touch-enabled control interface on HVAC controllers or PLC operator terminals exposed to dust, condensation, and ESD. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ scanning, display driving, and Modbus RTU communication over UART. Use Value: >5:1 SNR and water tolerance ensure reliable touch response under humid conditions; Deep Sleep mode extends battery life in wireless gateway variants. |
Use Scenario: Touch-sensitive cooktop, oven, or washing machine control panel requiring EMI resilience and user feedback via LED/PWM dimming. IC Role / Device Role / Timing Role: Single-chip solution managing capacitive keys, thermal monitoring (via internal temp sensor), and RGB LED sequencing using TCPWM blocks. Use Value: Integrated IDACs enable current-mode proximity sensing for gesture detection; programmable slew rates minimize conducted emissions in Class B environments. |
| Medical Patient Monitors | Automotive Cabin Controls |
Use Scenario: Non-invasive patient interface on portable monitors where glove operation and sterilization resistance are required. IC Role / Device Role / Timing Role: CAPSENSE™ controller with analog front-end for biopotential signal conditioning and USB CDC communication via SCB. Use Value: Opamp buffer mode enables direct connection to dry-electrode ECG sensors; 2.5 µA Deep Sleep supports long-term battery operation in ambulatory devices. |
Use Scenario: Center-stack or door-panel touch controls in EVs, subject to wide temperature (-40°C to +105°C) and automotive EMC requirements. IC Role / Device Role / Timing Role: Safety-aware MCU executing CAPSENSE™ with comparator-triggered kill signals for backlight dimming and CAN message framing via SCB. Use Value: TCPWM kill-input capability ensures immediate LED shutdown during fault detection; AEC-Q100 Grade 2 qualification confirmed per Infineon documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4026LQI-S423 | Lower memory (32 KB flash / 4 KB SRAM); no WCO; 32-pin QFN package | Limited to simpler CAPSENSE™ designs without RTC or high-channel-count ADC | Select when cost and board space constrain requirements and full 44-pin TQFP routing is unnecessary. |
| CY8C4127AZI-S433 | Same package and core, but adds USB 2.0 FS PHY and 128 KB flash | Required for host-side USB HID or MSC implementations; higher code footprint support | Choose when firmware requires USB connectivity or future-proofing against feature expansion beyond 64 KB. |
Compared with CY8C4126AZI-S433T, CY8C4026LQI-S423 trades memory and clocking for lower cost and smaller footprint, while CY8C4127AZI-S433 adds USB and flash headroom at identical pinout-making the S433T optimal for non-USB, resource-balanced CAPSENSE™-centric designs.
Availability
CY8C4126AZI-S433T is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical patient interfaces, and automotive cabin controls requiring stable component supply, long-lifecycle support, and qualified automotive-grade variants.
Supply support for CY8C4126AZI-S433T 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 connectivity solutions, with global R&D and manufacturing infrastructure.
CY8C4126AZI-S433T belongs to the PSoC™ 4100S family, designed specifically for cost-sensitive, low-power embedded systems requiring integrated capacitive sensing, analog signal conditioning, and flexible digital peripherals without external glue logic.
FAQ
What is the maximum operating temperature range for CY8C4126AZI-S433T?
The CY8C4126AZI-S433T is rated for industrial temperature range: –40 °C to +85 °C ambient. This is validated per Infineon's datasheet Rev. *Q (2024-02-27), Section 5.2. Its 44-lead TQFP package meets JEDEC J-STD-020 moisture sensitivity level 3, and thermal performance supports sustained operation at full 48 MHz CPU speed within this range.
Does CY8C4126AZI-S433T support USB device functionality?
No, CY8C4126AZI-S433T does not include a USB physical layer or USB controller. USB capability is present only in higher-tier PSoC™ 4100S variants such as CY8C4127AZI-S433. This part relies on its three SCBs for UART, I²C, or SPI communication, making it suitable for RS-485 gateways or BLE co-processor interfaces instead of native USB endpoints.
How many CAPSENSE™ buttons can be implemented simultaneously?
The device supports up to 36 self-capacitive or mutual-capacitive buttons using its dedicated sigma-delta CAPSENSE™ block, limited only by available GPIO count and scan time budget. With SmartSense auto-tuning, each button maintains >5:1 SNR across voltage, temperature, and contamination variations-no manual recalibration required per button count.
Is the internal 32 kHz watch crystal oscillator (WCO) included on-chip?
No, the WCO is an external circuit: CY8C4126AZI-S433T provides dedicated XIN/XOUT pins to connect a 32.768 kHz quartz crystal. The internal 32 kHz ILO serves as a low-power backup clock source, but the WCO must be externally populated to achieve ±20 ppm accuracy for RTC applications, as specified in Section 2.2.5 of the datasheet.
CY8C4126AZI-S433T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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, 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-S433T FAQ
1.How can I place an order for CY8C4126AZI-S433T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126AZI-S433T 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-S433T reliable?
The price and inventory of CY8C4126AZI-S433T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126AZI-S433T is usually 5 days.
3.What payment methods are accepted for CY8C4126AZI-S433T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126AZI-S433T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126AZI-S433T?
CY8C4126AZI-S433T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126AZI-S433T 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-S433T?
For technical support, including CY8C4126AZI-S433T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126AZI-S433T requirements.
6.How does Aetrix verify that CY8C4126AZI-S433T is sourced from the original manufacturer or authorized distributors?
All CY8C4126AZI-S433T 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-S433T meets industry standards.
7.What is the process for return or replacement of CY8C4126AZI-S433T?
All CY8C4126AZI-S433T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126AZI-S433T, 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-S433T part is unused and in its original packaging.
Return procedure for CY8C4126AZI-S433T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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