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Infineon Technologies CY8C4125LQI-S422T
- Part No.:
- CY8C4125LQI-S422T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQI-S422T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,953
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Product details
Overview
CY8C4125LQI-S422T 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 deep-sleep operation at 2.5 µA digital current, includes three SCBs (I²C/SPI/UART), five TCPWM blocks, and 36 GPIOs-used in human-interface devices requiring robust touch control and low-power embedded logic.
For engineers reviewing the CY8C4125LQI-S422T datasheet, CY8C4125LQI-S422T pinout, CY8C4125LQI-S422T application, or CY8C4125LQI-S422T equivalent, key selection criteria include CAPSENSE™ SNR performance (>5:1), deep-sleep analog retention, TCPWM kill-signal triggering for motor safety, and ModusToolbox™-supported firmware development flow.
Technical Context
The device integrates a single-core Arm Cortex-M0+ CPU with tightly coupled flash and SRAM, enabling deterministic real-time execution. Its programmable analog subsystem includes two opamps supporting comparator and ADC buffering modes, plus a 12-bit 1-Msps SAR ADC with channel sequencer and signal averaging-enabling simultaneous sensor acquisition and low-noise signal conditioning.
Digital flexibility comes from five TCPWM blocks supporting center-aligned PWM and quadrature decoding, three reconfigurable SCBs, and Smart I/O for pre-processing GPIO events without CPU intervention. The CAPSENSE™ sigma-delta engine delivers water-tolerant touch detection with hardware-accelerated SmartSense auto-tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+ @ 48 MHz - enables real-time deterministic control with single-cycle multiply for efficient math operations. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for complex CAPSENSE™ firmware, communication stacks, and application logic with over-the-air update headroom. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended - supports high-fidelity sensor interface with built-in sequencer and averaging for noise reduction. |
| Power Consumption | 2.5 µA in Deep Sleep with analog active - allows battery-powered touch interfaces to maintain wake-on-touch capability for months. |
| CAPSENSE™ Performance | SNR >5:1 with water tolerance - ensures reliable touch detection on wet or contaminated surfaces without firmware compensation. |
| GPIO Count | 36 programmable pins - each configurable as CAPSENSE™, analog input, or digital I/O with programmable drive strength and slew rate. |
| Serial Interfaces | 3 × SCBs supporting I²C/SPI/UART concurrently - enables multi-protocol connectivity (e.g., I²C touch controller + SPI display + UART debug) without external bridges. |
Pinout & Package
Package: 44-lead TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V input; powers all digital logic, analog blocks, and GPIOs-supports direct connection to common system rails. |
| GND | Ground reference | Dedicated analog/digital ground plane connection point; critical for CAPSENSE™ noise immunity and ADC accuracy. |
| XRES | Active-low reset | Asynchronous reset input; debounced internally-enables reliable power-on and fault recovery without external RC network. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug port-supports full-speed programming, real-time tracing, and breakpoints via standard Arm debug tools. |
| P0[0]–P0[7] | General-purpose I/O | Capable of CAPSENSE™, analog input, or digital function; configurable slew rate and drive strength optimize EMI and signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration eliminates manual tuning-reduces firmware development time and improves production yield. |
| Deep Sleep Analog Retention | Opamps and comparators remain operational at 2.5 µA system current-enables wake-on-touch with sub-100 µs latency. |
| Reconfigurable SCBs | Three independent serial blocks dynamically assigned as I²C, SPI, or UART at runtime-simplifies BOM by eliminating protocol-specific ICs. |
| TCPWM Kill Signal | Comparator-triggered hardware PWM shutdown-provides fail-safe motor control response within one clock cycle, meeting functional safety requirements. |
| Programmable Drive Modes | Each GPIO supports open-drain, push-pull, high-Z, resistive pull-up/down-enables direct interfacing with diverse sensors, LEDs, and legacy peripherals. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
|
Use Scenario: Capacitive touch buttons and sliders on oven, washer, or HVAC control panels exposed to moisture and cleaning agents. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing display updates via SPI, and controlling relay drivers via GPIO/PWM. Use Value: Water-tolerant >5:1 SNR ensures reliable operation under condensation or spills; deep-sleep current extends battery backup life during power outages. |
Use Scenario: Operator panel on PLC-controlled machinery requiring ESD-hardened touch input and real-time status feedback. IC Role / Device Role / Timing Role: Real-time controller handling touch interrupt, driving segmented LCD via GPIO, and communicating diagnostics over UART/I²C. Use Value: Hardware TCPWM kill signals enable immediate motor stop on emergency button press-bypassing software latency for SIL-2 compliance. |
| Medical Device Keypad | Smart Lighting Dimmer Module |
|
Use Scenario: Sterilizable touch interface on infusion pumps or diagnostic equipment requiring low-power standby and high EMC immunity. IC Role / Device Role / Timing Role: CAPSENSE™ acquisition engine with signal averaging, isolated I²C communication to main controller, and watchdog-managed firmware integrity. Use Value: Internal 32 kHz WCO provides accurate timing for watchdog and sleep intervals without external crystal-reducing component count and board area. |
Use Scenario: DALI- or 0–10 V dimmable LED driver with touch-adjustable brightness and color temperature presets. IC Role / Device Role / Timing Role: Touch processor generating PWM for LED current control, storing user profiles in flash, and communicating via UART to lighting gateway. Use Value: Integrated IDACs drive capacitive sense channels directly-eliminating external current sources and simplifying PCB layout for Class II isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S402 | Lower memory (32 KB flash / 4 KB SRAM); no TCPWM kill-signal support; same CAPSENSE™ engine. | Limited to simpler touch-only applications without motor control or complex firmware. | Select when cost sensitivity outweighs need for advanced PWM safety features and larger code space. |
| STM32G031K8T6 | No integrated CAPSENSE™; requires external touch controller; higher active current (50 µA/MHz vs. 2.5 µA deep sleep). | Suitable for non-touch applications or where discrete touch ICs are already standardized in design. | Choose only if existing STM32 toolchain familiarity and ecosystem outweigh CAPSENSE™ integration benefits. |
Compared with CY8C4125LQI-S422T, CY8C4025LQI-S402 reduces memory and safety features for cost-sensitive touch panels, while STM32G031K8T6 trades integrated capacitive sensing for broader ARM Cortex-M0 ecosystem support-but lacks hardware touch optimization and ultra-low deep-sleep current.
Availability
CY8C4125LQI-S422T is available at Aetrix Electronics and suitable for industrial HMI, medical keypad, smart lighting, and home appliance control requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4125LQI-S422T 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 qualification to AEC-Q100 and IATF 16949 standards.
CY8C4125LQI-S422T belongs to the PSoC™ 4100S product line, designed specifically for cost-sensitive, low-power human-interface applications requiring integrated capacitive sensing, flexible analog/digital reconfiguration, and rapid firmware development using ModusToolbox™.
FAQ
Does CY8C4125LQI-S422T support USB connectivity?
No, CY8C4125LQI-S422T does not include a USB PHY or USB controller. It relies on its three SCBs for I²C, SPI, or UART communication. For USB host/device functionality, an external USB-to-UART bridge (e.g., CP2102N) or companion MCU with USB support is required.
What is the maximum operating temperature for this device?
CY8C4125LQI-S422T is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Infineon's official datasheet (002-00122 Rev. *Q, Section 5.2), and applies across all operating modes including full-speed CPU execution and CAPSENSE™ acquisition.
Can the internal opamps be used for precision sensor signal conditioning?
Yes-the two continuous-time opamps support rail-to-rail input/output, gain bandwidth up to 12 MHz, and operate in Deep Sleep mode. They are specified for input offset voltage ≤3 mV and input bias current ≤1 pA, making them suitable for conditioning outputs from thermistors, RTDs, and bridge sensors at moderate precision levels.
Is ModusToolbox™ required for development, or can PSoC™ Creator still be used?
ModusToolbox™ is Infineon's current-generation development platform and fully supports CY8C4125LQI-S422T. PSoC™ Creator remains functional but is in maintenance mode; new projects should use ModusToolbox™ for ongoing updates, CAPSENSE™ Tuner integration, and long-term toolchain support.
CY8C4125LQI-S422T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- 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:
- 27
- 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:
CY8C4125LQI-S422T FAQ
1.How can I place an order for CY8C4125LQI-S422T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQI-S422T 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 CY8C4125LQI-S422T reliable?
The price and inventory of CY8C4125LQI-S422T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQI-S422T is usually 5 days.
3.What payment methods are accepted for CY8C4125LQI-S422T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQI-S422T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQI-S422T?
CY8C4125LQI-S422T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQI-S422T 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 CY8C4125LQI-S422T?
For technical support, including CY8C4125LQI-S422T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQI-S422T requirements.
6.How does Aetrix verify that CY8C4125LQI-S422T is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQI-S422T 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 CY8C4125LQI-S422T meets industry standards.
7.What is the process for return or replacement of CY8C4125LQI-S422T?
All CY8C4125LQI-S422T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQI-S422T, 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 CY8C4125LQI-S422T part is unused and in its original packaging.
Return procedure for CY8C4125LQI-S422T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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