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Infineon Technologies CY8C4025LQI-S403
- Part No.:
- CY8C4025LQI-S403
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CY8C4025LQI-S403.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
CY8C4025LQI-S403 from Infineon is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB flash, 4 KB SRAM, and integrated CAPSENSE™ capacitive sensing engine. It operates from 1.71 V to 5.5 V, supports Deep Sleep mode at 2.5 µA, and delivers best-in-class SNR (>5:1) for water-tolerant touch interfaces in consumer HMI and industrial control panels.
For engineers reviewing the CY8C4025LQI-S403 datasheet, CY8C4025LQI-S403 pinout, CY8C4025LQI-S403 application, or CY8C4025LQI-S403 equivalent, key selection criteria include its reconfigurable analog/digital blocks, dual SCB serial interfaces (I²C/SPI/UART), five TCPWM timers with comparator-triggered kill signals, and 36 GPIOs supporting programmable drive modes and LCD segment drive.
Technical Context
The device integrates a single-cycle multiply Arm® Cortex®-M0+ CPU running at up to 48 MHz, coupled with a flexible I/O subsystem enabling any GPIO to serve as CAPSENSE™, analog input, or digital port. Its analog subsystem includes two low-power comparators active in Deep Sleep and a sigma-delta capacitive sensing engine with hardware SmartSense tuning.
Digital resources comprise two reconfigurable serial communication blocks (SCBs), five 16-bit TCPWM units supporting center-aligned PWM and motor-control kill signals, and programmable logic blocks for Boolean operations on port signals - all routed via a high-speed interconnect without external glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz max, single-cycle multiply - enables real-time sensor fusion and deterministic control loops without external co-processors. |
| Memory | 32 KB flash with read accelerator + 4 KB SRAM - supports firmware updates in field and local data buffering for touch event queues. |
| Capacitive Sensing | CAPSENSE™ v2 with sigma-delta architecture and >5:1 SNR - achieves reliable button/slider detection under wet conditions and EMI noise. |
| Low-Power Modes | Deep Sleep current = 2.5 µA with analog active - sustains touch wake-up capability while preserving battery life in portable devices. |
| Serial Interfaces | 2 × SCBs, each configurable as I²C/SPI/UART - allows simultaneous host communication and sensor hub bridging without resource contention. |
| PWM & Timing | 5 × 16-bit TCPWM blocks with center-aligned, edge-aligned, and pseudo-random modes - supports precise motor phase control and LED dimming with hardware kill signal triggering. |
| GPIO | 36 programmable pins with configurable drive strength, slew rate, and CAPSENSE™/analog/digital multiplexing - eliminates need for external level shifters or dedicated touch controllers. |
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 |
|---|---|---|
| VDD | Core & I/O supply | Accepts 1.71–5.5 V; powers CPU, memory, and all digital/analog blocks - enables single-rail operation across diverse system voltages. |
| VSS | Digital ground | Primary reference for digital logic and I/O buffers; must be low-impedance connection to minimize switching noise coupling into analog paths. |
| P0[0]–P0[7] | General-purpose I/O | Port 0 pins support CAPSENSE™, analog input, or digital functions; programmable pull-up/down and drive strength - used for touch buttons and status indicators. |
| P1[0]–P1[7] | General-purpose I/O | Port 1 pins include SCB0 and TCPWM0 routing; enable UART debug interface and motor gate driver PWM outputs simultaneously. |
| SWDCLK / SWDIO | Debug interface | Arm® Serial Wire Debug pins - provide full in-system programming and real-time debugging using MiniProg4 or industry-standard SWD probes. |
| XRES | External reset | Active-low asynchronous reset input - allows system-level power-on reset coordination and brown-out recovery without internal POR dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two IDACs and two low-power comparators usable in Deep Sleep - enable continuous proximity sensing or battery voltage monitoring during ultra-low-power standby. |
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration - eliminates manual threshold tuning and maintains stable touch response across temperature/humidity drift and PCB aging. |
| Programmable Digital Logic | Boolean logic blocks on GPIO ports - implement debounce, edge detection, or state machines directly in hardware without CPU intervention or firmware overhead. |
| LCD Segment Drive | Up to 36 segments driven directly by GPIOs - reduces BOM cost by removing external LCD drivers in small-display applications like thermostats or appliance panels. |
| ModusToolbox™ Integration | Pre-verified CAPSENSE™ middleware and PDL drivers - accelerates development of production-ready touch GUIs with <100 ms time-to-first-touch. |
Applications
| Home Appliance Control Panel | Industrial HMI Terminal |
|---|---|
Use Scenario: Touch-enabled oven/microwave control interface exposed to steam, condensation, and cleaning agents. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing display backlight PWM, and communicating with main controller via I²C. Use Value: Sigma-delta CAPSENSE™ with >5:1 SNR ensures reliable button actuation even when surface is wet; Deep Sleep at 2.5 µA extends battery backup runtime during power loss. | Use Scenario: Ruggedized panel-mounted operator interface for PLC-controlled machinery with EMI exposure. IC Role / Device Role / Timing Role: Standalone HMI processor handling touch input, LED status feedback, and RS-485 gateway via SCB1 configured as UART. Use Value: Programmable slew rates and drive strengths suppress EMI emissions; TCPWM kill signals halt motor drives instantly upon emergency stop detection. |
| Portable Medical Device UI | Smart Lighting Control Node |
Use Scenario: Battery-powered glucose meter or infusion pump with sealed membrane touch overlay. IC Role / Device Role / Timing Role: System-on-chip managing capacitive touch, OLED display timing, and BLE communication via SCB0 in UART mode. Use Value: Single 32 KB flash image hosts both CAPSENSE™ and BLE stack; SmartSense auto-calibration compensates for overlay thickness variation across production batches. | Use Scenario: DALI-2 or 0–10 V dimmable LED driver with local touch adjustment and thermal foldback. IC Role / Device Role / Timing Role: Embedded controller performing PWM dimming, NTC-based thermal monitoring, and capacitive slider input. Use Value: Two IDACs enable ratiometric current sourcing for precision analog sensor reads; five TCPWM units allow independent channel dimming plus thermal protection pulse generation. |
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 |
|---|---|---|---|
| CY8C4025AZI-S403 | Same core and peripherals, but in 40-pin QFN package (6 mm × 6 mm) with reduced GPIO count (28 pins) and no LCD drive capability. | Suitable for space-constrained designs where touch-only I/O suffices and display integration is handled externally. | Select when board area is critical and LCD functionality is unnecessary; verify thermal dissipation in sealed enclosures. |
| CY8C4014LQI-S412 | Lower memory (16 KB flash / 2 KB SRAM), no SmartSense, and only one SCB - lacks dual-protocol serial flexibility and advanced CAPSENSE™ tuning. | Targeted at cost-sensitive, single-function touch nodes without firmware update requirements or multi-interface needs. | Choose only for fixed-feature, high-volume consumer products where future scalability is not required. |
Compared with CY8C4025AZI-S403 and CY8C4014LQI-S412, the CY8C4025LQI-S403 provides the highest I/O density and full CAPSENSE™ v2 feature set in TQFP packaging - making it optimal for prototyping, mid-volume industrial HMIs, and designs requiring layout flexibility and long-term firmware extensibility.
Availability
CY8C4025LQI-S403 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, portable medical device UIs, and smart lighting control nodes requiring stable component supply and long-term design continuity.
Supply support for CY8C4025LQI-S403 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 ICs, and embedded controllers, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The PSoC™ 4000S product line targets cost-optimized, highly integrated embedded systems requiring reconfigurable analog/digital logic and robust capacitive sensing - designed specifically for human-machine interface consolidation in appliances, industrial controls, and IoT endpoints.
FAQ
What development tools are officially supported for CY8C4025LQI-S403?
Infineon officially supports ModusToolbox™ software (cross-platform, Eclipse-based) and PSoC™ Creator (Windows-only IDE). Both provide full CAPSENSE™ configuration, TCPWM setup, and SCB peripheral initialization. The CY8CKIT-145-40XX prototyping kit offers direct hardware access to all 36 GPIOs and includes onboard MiniProg4 debugger.
Does CY8C4025LQI-S403 support secure firmware updates?
Yes - the device includes ROM-based bootloader support and flash protection mechanisms that prevent unauthorized read/write access. Secure boot is implemented via customer-configurable flash lock bits and optional checksum validation in user firmware; however, it does not include hardware cryptographic accelerators or key storage.
Can the CAPSENSE™ block operate independently during Deep Sleep?
Yes - the CAPSENSE™ sigma-delta sensing engine remains fully functional in Deep Sleep mode with only 2.5 µA system current. Hardware SmartSense auto-tuning continues to run, and touch interrupts can wake the CPU without exiting Deep Sleep, enabling sub-100 ms wake-to-detect latency.
What is the maximum operating temperature for CY8C4025LQI-S403 in industrial applications?
The CY8C4025LQI-S403 is rated for industrial temperature range: –40 °C to +85 °C ambient. Its 48-pin TQFP package has been validated for sustained operation at 85 °C junction temperature under 100% CPU load with standard PCB copper pour; derating applies above 70 °C ambient if no forced airflow is present.
CY8C4025LQI-S403 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 40-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4000S
- 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:
- 34
- 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; D/A 2x7b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4025LQI-S403 FAQ
1.How can I place an order for CY8C4025LQI-S403 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4025LQI-S403 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 CY8C4025LQI-S403 reliable?
The price and inventory of CY8C4025LQI-S403 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4025LQI-S403 is usually 5 days.
3.What payment methods are accepted for CY8C4025LQI-S403?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4025LQI-S403 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4025LQI-S403?
CY8C4025LQI-S403 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4025LQI-S403 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 CY8C4025LQI-S403?
For technical support, including CY8C4025LQI-S403 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4025LQI-S403 requirements.
6.How does Aetrix verify that CY8C4025LQI-S403 is sourced from the original manufacturer or authorized distributors?
All CY8C4025LQI-S403 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 CY8C4025LQI-S403 meets industry standards.
7.What is the process for return or replacement of CY8C4025LQI-S403?
All CY8C4025LQI-S403 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4025LQI-S403, 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 CY8C4025LQI-S403 part is unused and in its original packaging.
Return procedure for CY8C4025LQI-S403:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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