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Infineon Technologies CY8C4125FNI-S433T
- Part No.:
- CY8C4125FNI-S433T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 35-XFBGA, WLCSP
- Datasheet:
-
CY8C4125FNI-S433T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 35WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,484
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Product details
Overview
CY8C4125FNI-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, and reconfigurable analog/digital blocks. It supports 1-Msps 12-bit SAR ADC, two opamps, five TCPWM units, three SCBs (I²C/SPI/UART), and operates from 1.71–5.5 V in Deep Sleep mode at 2.5 µA. Used in touch-enabled human-machine interfaces for industrial control panels.
For engineers reviewing the CY8C4125FNI-S433T datasheet, CY8C4125FNI-S433T pinout, CY8C4125FNI-S433T application, or CY8C4125FNI-S433T equivalent, key selection criteria include CAPSENSE™ SNR performance (>5:1), deep-sleep current consumption (2.5 µA), TCPWM quadrature decoding capability, and GPIO flexibility (36 pins, all configurable for analog/digital/CAPSENSE™).
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (CTB opamps, SAR ADC, CSD sigma-delta block) and digital (PLD logic, TCPWM, SCB) subsystems. Its SmartSense auto-tuning and hardware-accelerated CAPSENSE™ engine enable robust water-tolerant touch detection without host CPU intervention.
System-level timing relies on multiple clock sources: ±2% IMO, 32 kHz ILO, and external WCO. All 36 GPIOs support dynamic reconfiguration between digital, analog, and CAPSENSE™ roles, with programmable drive strength, slew rate, and pull-up/down-enabling single-chip integration of sensing, control, and communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - delivers deterministic real-time control with single-cycle multiply for motor or sensor fusion tasks. |
| Memory | 64 KB flash / 8 KB SRAM - sufficient for firmware + CAPSENSE™ tuning tables and real-time signal processing buffers. |
| ADC | 12-bit SAR @ 1 Msps with sequencer & averaging - enables high-resolution multi-channel sensor acquisition with noise suppression. |
| CAPSENSE™ | Sigma-delta CSD with >5:1 SNR and SmartSense auto-tuning - achieves reliable touch detection under wet or noisy EMI conditions. |
| Low-power Mode | Deep Sleep @ 2.5 µA with active analog - maintains touch wake-up capability while minimizing battery drain in portable HMI. |
| Communication | 3 × SCBs supporting I²C/SPI/UART concurrently - allows simultaneous connection to display, sensor hub, and host MCU without external bridges. |
| PWM/Timing | 5 × 16-bit TCPWM blocks with quadrature decode & kill-input triggering - supports BLDC motor control and safety-critical timing functions. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO / CAPSENSE™ / Analog Input | Configurable as touch sense electrode, ADC input, or digital I/O; supports high-drive analog output when used with CTB. |
| P1[0]–P1[7] | GPIO / SCB / TCPWM | Supports I²C/SPI/UART signal routing and PWM output; some pins offer dedicated TCPWM kill-input functionality. |
| P2[0]–P2[7] | GPIO / LCD Segment / IDAC Output | Drives LCD segments directly; also routes IDAC current for self-capacitance or mutual-capacitance sensing configurations. |
| VDD / VSS | Power / Ground | Single 1.71–5.5 V supply rail; separate analog/digital ground pins ensure low-noise ADC and CAPSENSE™ operation. |
| XRES | Reset Input | Active-low reset with internal pull-up; accepts 1.2–5.5 V logic levels for compatibility with diverse system supervisors. |
| SWDCLK / 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 |
|---|---|
| Reconfigurable Analog Blocks | Two continuous-time opamps usable as buffer, comparator, or transimpedance amplifier - reduces BOM count by eliminating external signal-conditioning ICs. |
| Hardware CAPSENSE™ Engine | Dedicated sigma-delta modulator with automatic SmartSense calibration - eliminates firmware overhead for baseline tracking and noise compensation. |
| Programmable Digital Logic | PLD-based Boolean logic on port signals - enables custom glue logic (e.g., interrupt arbitration or status encoding) without CPU involvement. |
| Flexible Clock System | IMO ±2%, ILO 32 kHz, and WCO support - allows precise timing for RTC, touch scanning, and communication without external crystals in cost-sensitive designs. |
| GPIO Flexibility | All 36 pins support analog, digital, and CAPSENSE™ roles with programmable drive strength - simplifies PCB layout and enables last-minute design changes via firmware. |
Applications
| Industrial HMI Panel | Smart Appliance Control |
|---|---|
|
Use Scenario: Touch-enabled operator interface on PLC-mounted control panel with ambient temperature up to 70°C and exposure to conductive dust. IC Role / Device Role / Timing Role: Primary controller managing CAPSENSE™ buttons/sliders, driving 4-digit LCD, and communicating via I²C to local sensor nodes. Use Value: Deep Sleep current of 2.5 µA extends battery backup life; >5:1 SNR ensures reliable touch detection despite surface contamination. |
Use Scenario: Cooktop control with proximity wake-up, slider-based power adjustment, and water-resistant overlay. IC Role / Device Role / Timing Role: Standalone CAPSENSE™ + MCU handling all user interaction, thermal monitoring via SAR ADC, and PWM-driven LED indicators. Use Value: Hardware SmartSense auto-tunes sensing parameters across temperature and humidity; TCPWM center-aligned mode enables smooth LED dimming. |
| Medical Device Keypad | IoT Gateway Edge Node |
|
Use Scenario: Disinfectant-resistant touch keypad on portable diagnostic equipment requiring low EMI and fail-safe operation. IC Role / Device Role / Timing Role: Dedicated touch controller interfacing with host ARM processor via UART; manages wake-on-touch and button debouncing in hardware. Use Value: Low-power comparators remain active in Deep Sleep to detect touch events; isolated analog/digital grounds minimize noise coupling into sensitive analog front-end. |
Use Scenario: Battery-powered environmental monitor aggregating data from multiple sensors and transmitting via BLE module. IC Role / Device Role / Timing Role: Sensor hub collecting thermistor, humidity, and motion data via SAR ADC and GPIO interrupts; schedules BLE transmission using TCPWM timers. Use Value: Single-chip integration of analog acquisition, digital logic, and communication reduces footprint and power vs. discrete MCU + ADC + logic solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller with integrated capacitive sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S412 | Lower memory (32 KB flash / 4 KB SRAM); no TCPWM quadrature decode; 28-pin QFN package. | Limited to simpler touch-only applications without motor control or complex timing. | Select when BOM cost and board space are critical, and advanced timing features are unnecessary. |
| CY8C4247AZI-M485 | Higher performance (48 MHz M0+, 256 KB flash, 32 KB SRAM); includes USBFS; 68-pin TQFP. | Supports USB HID touch devices and more complex firmware stacks (e.g., ModusToolbox middleware). | Select when future scalability, USB connectivity, or larger code footprint is required. |
Compared with CY8C4125FNI-S433T, CY8C4025LQI-S412 trades memory and timing capability for lower cost and smaller footprint, while CY8C4247AZI-M485 adds USB and memory headroom at the expense of higher unit price and larger package.
Availability
CY8C4125FNI-S433T is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical keypad, and IoT edge node applications requiring stable component supply, long-term lifecycle support, and qualified automotive-grade traceability.
Supply support for CY8C4125FNI-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 microcontrollers, with global manufacturing and quality certifications including IATF 16949.
CY8C4125FNI-S433T belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, touch-centric embedded systems requiring integrated analog sensing, low-power operation, and field-programmable flexibility without external components.
FAQ
Does CY8C4125FNI-S433T support USB connectivity?
No. This device lacks a USB physical layer or USBFS peripheral. It provides three SCB modules configurable only as I²C, SPI, or UART. For USB-capable PSoC™ 4 variants, consider CY8C4247AZI-M485 or CY8C4248LQI-BL553, which integrate USBFS with full-speed capability and descriptor handling.
What development tools are officially supported for CY8C4125FNI-S433T?
Infineon officially supports ModusToolbox™ (v3.x+) and legacy PSoC™ Creator v4.4 for this part. ModusToolbox provides CMSIS-Pack-based BSPs, PDL drivers, CAPSENSE™ Tuner, and middleware; PSoC™ Creator offers schematic-based design entry and automatic routing for analog/digital resources.
Can all 36 GPIOs be used simultaneously for CAPSENSE™ electrodes?
Yes - all GPIOs support CAPSENSE™ functionality, but practical electrode count depends on scan time and SNR requirements. The CSD block supports up to 32 electrodes in mutual-capacitance mode or 64 in self-capacitance mode, with hardware-accelerated scanning and SmartSense auto-calibration.
Is CY8C4125FNI-S433T qualified for automotive applications?
No. This variant is rated for industrial temperature range (–40°C to +85°C) and carries industrial-grade qualification (AEC-Q200 not applicable). For automotive-qualified equivalents, refer to CY8C4126FNI-S433T (AEC-Q100 Grade 2, –40°C to +105°C) with identical peripherals and pinout.
CY8C4125FNI-S433T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 35-XFBGA, WLCSP
- 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, LVD, POR, PWM, WDT
- Number of I/O:
- 31
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K 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:
CY8C4125FNI-S433T FAQ
1.How can I place an order for CY8C4125FNI-S433T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125FNI-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 CY8C4125FNI-S433T reliable?
The price and inventory of CY8C4125FNI-S433T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125FNI-S433T is usually 5 days.
3.What payment methods are accepted for CY8C4125FNI-S433T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125FNI-S433T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125FNI-S433T?
CY8C4125FNI-S433T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125FNI-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 CY8C4125FNI-S433T?
For technical support, including CY8C4125FNI-S433T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125FNI-S433T requirements.
6.How does Aetrix verify that CY8C4125FNI-S433T is sourced from the original manufacturer or authorized distributors?
All CY8C4125FNI-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 CY8C4125FNI-S433T meets industry standards.
7.What is the process for return or replacement of CY8C4125FNI-S433T?
All CY8C4125FNI-S433T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125FNI-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 CY8C4125FNI-S433T part is unused and in its original packaging.
Return procedure for CY8C4125FNI-S433T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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