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Infineon Technologies CY8C4025FNI-S402T
- Part No.:
- CY8C4025FNI-S402T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 25-XFBGA, WLCSP
- Datasheet:
-
CY8C4025FNI-S402T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 25WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
CY8C4025FNI-S402T from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with 48 MHz CPU, 32 KB flash, 4 KB SRAM, integrated CAPSENSE™ capacitive sensing, two SCBs supporting I²C/SPI/UART, and five 16-bit TCPWM blocks - deployed in industrial HMI, consumer touch interfaces, and smart sensor nodes requiring low-power operation down to 2.5 µA in Deep Sleep mode.
For engineers reviewing the CY8C4025FNI-S402T datasheet, CY8C4025FNI-S402T pinout, CY8C4025FNI-S402T application, or CY8C4025FNI-S402T equivalent, key selection criteria include CAPSENSE™ SNR (>5:1), programmable analog (IDACs, comparators), GPIO flexibility (36 pins, configurable drive modes), and dual development tool support (ModusToolbox™ and PSoC™ Creator).
Technical Context
The device integrates a single-cycle multiply Arm® Cortex®-M0+ core with tightly coupled memory subsystem (32 KB flash + read accelerator, 4 KB SRAM) and system-level peripherals including WCO, IMO, and ILO clock sources. Its programmable analog layer delivers sigma-delta capacitive sensing with hardware-accelerated SmartSense tuning and supports IDAC-driven current sourcing on any GPIO.
Digital resources include two reconfigurable serial communication blocks (SCBs), five TCPWM units with center-aligned/PWM/kill-signal triggering, and programmable logic blocks for boolean port-level operations - all routed via a unified high-speed I/O matrix and managed under a single-layer AHB interconnect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz max, single-cycle multiply - enables real-time firmware execution with deterministic interrupt latency for motor control and touch response. |
| Memory | 32 KB flash (with read accelerator), 4 KB SRAM - sufficient for CAPSENSE™ firmware, communication stacks, and small RTOS deployments without external memory. |
| Capacitive Sensing | CAPSENSE™ v2 with sigma-delta architecture, >5:1 SNR, water-tolerant - supports robust proximity/touch buttons/sliders in humid or wet environments. |
| Analog Peripherals | Two low-power comparators (active in Deep Sleep), two IDACs (up to 2 mA), 10-bit ADC function via capacitance sensing block - enables self-contained analog signal conditioning without external components. |
| Digital Peripherals | Two SCBs (I²C/SPI/UART), five 16-bit TCPWM blocks, programmable logic blocks - supports multi-protocol connectivity and precise timing control for LED dimming, motor commutation, or pulse generation. |
| Power Management | 1.71–5.5 V operation, Deep Sleep current ≤2.5 µA with analog active - allows battery-powered operation for years in sensor endpoints and portable HMI. |
| GPIO | Up to 36 programmable pins, configurable drive strength/slew rate, CAPSENSE™/analog/digital multiplexing - simplifies PCB layout and reduces BOM by eliminating dedicated touch or analog ICs. |
Pinout & Package
Package: 40-pin QFN (6 × 6 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V input; powers digital logic, analog blocks, and GPIO drivers - requires local decoupling per datasheet layout guidelines. |
| VSS | Ground reference | Primary return path for all domains; must be connected to thermal pad and low-impedance ground plane. |
| P0[0]–P0[7] | Port 0 GPIO | Configurable as CAPSENSE™, analog input/output, or digital I/O; supports slew-rate control and up to 25 mA drive strength. |
| SWDCLK / SWDIO | Debug interface | Serial Wire Debug pins - enable full-chip programming, breakpoint debugging, and trace without external emulators. |
| XRES | External reset | Active-low asynchronous reset input; debounced internally and compatible with pushbutton or supervisor ICs. |
| WCO_IN / WCO_OUT | 32.768 kHz crystal | Connects to external watch crystal for precision RTC and low-power timing - supports ±20 ppm stability over temperature. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense auto-tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual parameter adjustment and ensures consistent performance across voltage, temperature, and PCB variation. |
| Programmable analog blocks | Two IDACs and two low-power comparators operate in Deep Sleep - enable wake-on-touch or analog threshold detection without waking CPU. |
| Reconfigurable SCBs | Each SCB can be independently assigned as I²C master/slave, SPI master/slave, or UART - reduces peripheral count and supports protocol migration in field-upgradable designs. |
| Flexible TCPWM kill signals | Comparator-triggered PWM shutdown within <100 ns - critical for safe motor control and power converter protection against overcurrent or overtemperature faults. |
| GPIO configurability | All 36 pins support multiple functions (CAPSENSE™, analog, digital), programmable drive mode (pull-up/down, open-drain, strong), and slew rate - minimizes need for external level shifters or buffers. |
Applications
| Industrial HMI Panels | Smart Home Touch Controls |
|---|---|
Use Scenario: Wall-mounted thermostats and control panels with waterproof touch sliders and status LEDs. IC Role / Device Role / Timing Role: Main MCU executing CAPSENSE™ firmware, driving LCD segments, managing I²C-connected sensors, and generating PWM for backlight dimming. Use Value: Single-chip integration replaces discrete touch controller + MCU + LED driver, reducing BOM cost and board area while maintaining >5:1 SNR in condensing environments. | Use Scenario: Battery-powered light switches and appliance control knobs with gesture recognition. IC Role / Device Role / Timing Role: Low-power system controller handling wake-on-touch, BLE communication via SCB, and timed LED feedback using TCPWM. Use Value: 2.5 µA Deep Sleep current extends coin-cell life beyond 5 years; SmartSense ensures reliable operation despite housing material variability. |
| Medical Wearable Sensors | White Goods User Interfaces |
Use Scenario: Disposable pulse oximeters and glucose monitors requiring compact size and moisture resilience. IC Role / Device Role / Timing Role: Signal acquisition MCU acquiring analog sensor data via IDAC-biased photodiodes, processing CAPSENSE™ for buttonless interaction, and transmitting via UART to host. Use Value: Integrated sigma-delta sensing eliminates external ADC and noise-filtering components; programmable analog reduces analog front-end complexity. | Use Scenario: Washing machine and dishwasher control panels with wash-cycle timers and status indicators. IC Role / Device Role / Timing Role: System-on-chip managing CAPSENSE™ buttons, driving 7-segment LCD via GPIO, controlling relays via TCPWM-triggered outputs, and logging cycle data to flash. Use Value: Five TCPWM blocks support independent timing for pump control, heater duty cycling, buzzer tones, and display refresh - no external timer IC required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S402 | Same core and peripherals, but 32-pin QFN package (fewer GPIOs), no WCO pins, lower max operating temperature (85°C vs. 105°C) | Suitable for space-constrained, cost-sensitive designs with reduced I/O count and ambient temperature <85°C | Select when footprint and thermal budget allow trade-off of GPIO count and extended temperature range. |
| CY8C4127LQI-S433 | Higher flash (128 KB), more SRAM (16 KB), additional SCB and TCPWM blocks, but no CAPSENSE™ v2 hardware acceleration | Better for complex firmware with BLE stack or larger UI rendering; lacks SmartSense and sigma-delta SNR advantage | Choose when computational headroom and peripheral count outweigh CAPSENSE™ performance requirements. |
Compared with CY8C4025LQI-S402, this part adds WCO support and extended temperature rating; versus CY8C4127LQI-S433, it trades memory capacity for superior capacitive sensing fidelity and lower power in touch-active states.
Availability
CY8C4025FNI-S402T is available at Aetrix Electronics and suitable for industrial HMI, smart home controls, medical wearables, and white goods user interfaces requiring stable component supply, long-term lifecycle support, and qualified automotive-grade traceability.
Supply support for CY8C4025FNI-S402T 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 systems, with global R&D and manufacturing infrastructure.
This device belongs to the PSoC™ 4000S product line - designed specifically for cost-sensitive, low-power embedded applications demanding integrated capacitive sensing, flexible analog/digital reconfiguration, and rapid prototyping via ModusToolbox™ or PSoC™ Creator.
FAQ
What development tools are officially supported for CY8C4025FNI-S402T?
Infineon officially supports both ModusToolbox™ (cross-platform, Eclipse-based, GitHub-integrated) and PSoC™ Creator (Windows-only, schematic-driven IDE). ModusToolbox™ provides peripheral configurators and CAPSENSE™ middleware; PSoC™ Creator offers drag-and-drop component placement and automatic routing. Both generate production-ready code and support MiniProg4 debugging.
Does CY8C4025FNI-S402T support hardware encryption or secure boot?
No. This device does not include hardware cryptographic accelerators, secure boot ROM, or flash write-protection fuses. It supports basic flash lock bits and debug disable via firmware, but lacks dedicated security peripherals found in PSoC™ 4100S or PSoC™ 6 families. Secure firmware updates require external implementation using software-based signing and verification.
Can all 36 GPIOs be used simultaneously for CAPSENSE™ sensing?
No. While all GPIOs are CAPSENSE™-capable, the hardware limits concurrent sensing electrodes to 24 due to shared analog routing resources and sigma-delta modulator bandwidth. Practical layouts typically use 12–16 electrodes with guard rings and shielding to maintain >5:1 SNR; higher counts require time-multiplexed scanning and firmware compensation.
Is the WCO oscillator mandatory for real-time clock functionality?
No. The internal 32 kHz ILO provides RTC timing with ±50% accuracy over temperature and voltage, sufficient for non-critical timekeeping. The WCO (±20 ppm) is optional but required for applications needing precise time-of-day tracking, low-power calendar alarms, or synchronization with external 32.768 kHz clocks - and must be externally connected to WCO_IN/WCO_OUT pins.
CY8C4025FNI-S402T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 25-XFBGA, WLCSP
- Series:
- PSOC™ 4 CY8C4000S
- 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:
- 21
- 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 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4025FNI-S402T FAQ
1.How can I place an order for CY8C4025FNI-S402T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4025FNI-S402T 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 CY8C4025FNI-S402T reliable?
The price and inventory of CY8C4025FNI-S402T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4025FNI-S402T is usually 5 days.
3.What payment methods are accepted for CY8C4025FNI-S402T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4025FNI-S402T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4025FNI-S402T?
CY8C4025FNI-S402T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4025FNI-S402T 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 CY8C4025FNI-S402T?
For technical support, including CY8C4025FNI-S402T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4025FNI-S402T requirements.
6.How does Aetrix verify that CY8C4025FNI-S402T is sourced from the original manufacturer or authorized distributors?
All CY8C4025FNI-S402T 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 CY8C4025FNI-S402T meets industry standards.
7.What is the process for return or replacement of CY8C4025FNI-S402T?
All CY8C4025FNI-S402T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4025FNI-S402T, 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 CY8C4025FNI-S402T part is unused and in its original packaging.
Return procedure for CY8C4025FNI-S402T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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