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Infineon Technologies CY8C4125LQI-S412T
- Part No.:
- CY8C4125LQI-S412T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQI-S412T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
CY8C4125LQI-S412T 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 operates from 1.71 V to 5.5 V and supports deep-sleep mode with 2.5 µA system current, targeting human-interface and low-power embedded control applications.
For engineers reviewing the CY8C4125LQI-S412T datasheet, CY8C4125LQI-S412T pinout, CY8C4125LQI-S412T application, or CY8C4125LQI-S412T equivalent, key selection considerations include its reconfigurable analog/digital blocks, SmartSense auto-tuning for touch, TCPWM timing flexibility, and GPIO-capable CAPSENSE™ on all 36 pins - critical for rapid prototyping of touch-enabled industrial HMI and battery-powered sensor nodes.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (two opamps, two comparators, IDACs) and digital (PLD logic, TCPWM, SCBs) subsystems routed via a flexible interconnect matrix. Its CAPSENSE™ sigma-delta engine delivers >5:1 SNR and water tolerance without external components.
Clocking combines ±2% IMO, 32 kHz ILO, and WCO support; power management enables Deep Sleep with active analog and configurable wake sources. All 36 GPIOs support programmable drive strength, slew rate, and dual-role (analog/digital/CAPSENSE™), eliminating dedicated peripheral pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply enables real-time math in motor control and sensor fusion. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for ModusToolbox™ middleware, CAPSENSE™ library, and custom firmware with OTA update headroom. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended - supports high-fidelity analog sensor acquisition with hardware channel sequencing and averaging. |
| CAPSENSE™ | Sigma-delta CSD with SmartSense auto-tuning - eliminates manual calibration, achieves >5:1 SNR, and tolerates moisture on touch surfaces. |
| Serial Interfaces | 3 × SCBs - runtime-reconfigurable as I²C, SPI, or UART, enabling mixed-protocol connectivity without hardware redesign. |
| Power Range | 1.71 V to 5.5 V - supports direct Li-ion, coin-cell, or 3.3/5 V rail operation without external regulators. |
| Deep Sleep Current | 2.5 µA - maintains RTC, comparators, and opamp monitoring while preserving battery life for multi-year deployments. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO / CAPSENSE™ / Analog Input / SCB0 SDA/SCL | Programmable port with simultaneous analog sensing, digital I/O, and I²C interface - reduces BOM count in HMI designs. |
| P1[0]–P1[7] | GPIO / CAPSENSE™ / TCPWM0 / SCB1 MOSI/MISO | Supports quadrature decoding, PWM generation, and SPI slave/master - ideal for motor feedback and display control. |
| P2[0]–P2[7] | GPIO / CAPSENSE™ / ADC Input / SCB2 TX/RX | Direct SAR ADC channel routing and UART debug interface - simplifies sensor node bring-up and field diagnostics. |
| VDD / VSS | Power Supply / Ground | Dual VDD/VSS pairs per side ensure stable analog/digital separation and low-noise operation at full speed. |
| XRES | Active-Low Reset Input | External reset assertion compatible with push-button or supervisor ICs; debounced internally to prevent spurious resets. |
| SWDCLK / SWDIO | Debug Interface | 2-pin ARM Serial Wire Debug - enables programming, real-time trace, and breakpoints without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable SCBs | Three independent serial blocks dynamically assigned as I²C, SPI, or UART - avoids pin conflicts when adding sensors, displays, or wireless modules. |
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration - eliminates factory tuning steps and compensates for PCB aging, temperature drift, and humidity. |
| Programmable TCPWM | Five 16-bit timer/counter/PWM units with center-aligned, edge-aligned, and pseudo-random modes - supports precise motor phase control and LED dimming. |
| Deep Sleep Analog Retention | Opamps and comparators remain active in Deep Sleep at 2.5 µA - enables wake-on-touch or wake-on-threshold without full MCU restart. |
| Flexible GPIO Routing | All 36 pins support CAPSENSE™, analog input, or digital I/O with programmable drive strength (0.5–20 mA) and slew rate - simplifies layout and reduces layer count. |
Applications
| Industrial HMI Panel | Smart Home Appliance Control |
|---|---|
|
Use Scenario: Touch-enabled control panel for HVAC, lighting, or access systems operating in noisy electrical environments. IC Role / Device Role / Timing Role: Main controller executing CAPSENSE™ firmware, managing display updates via SPI, and regulating fan speed via TCPWM. Use Value: Sigma-delta CAPSENSE™ rejects EMI from nearby motors and transformers, while Deep Sleep extends battery backup runtime during standby. |
Use Scenario: Buttonless interface on refrigerator door or oven control panel exposed to condensation and grease. IC Role / Device Role / Timing Role: Capacitive touch processor with automatic water-tolerance compensation and LCD segment drive for status indicators. Use Value: SmartSense eliminates manual recalibration after cleaning; integrated LCD drive removes need for external display driver IC. |
| Portable Medical Sensor Node | Automotive Interior Switch |
|
Use Scenario: Battery-powered wearable pulse oximeter requiring ultra-low-power operation and analog signal conditioning. IC Role / Device Role / Timing Role: Signal acquisition hub: SAR ADC digitizes photodiode outputs, opamps buffer low-level signals, IDACs drive LEDs. Use Value: 2.5 µA Deep Sleep with active analog blocks enables multi-week operation on CR2032; 12-bit resolution ensures clinical-grade accuracy. |
Use Scenario: Non-mechanical door lock or seat position switch in automotive cabin with stringent EMC and reliability requirements. IC Role / Device Role / Timing Role: Safety-critical touch controller interfacing with CAN transceiver via SCB, validating inputs before actuation. Use Value: Hardware-based comparator kill signals disable actuators within microseconds upon fault detection - meets ASIL-B timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller with capacitive sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S402 | 32 KB flash, 4 KB SRAM, no TCPWM kill signal feature, lower GPIO count (28 pins) | Targeted at cost-sensitive, simpler touch interfaces without motor control or complex timing | Select when firmware size <32 KB and no hardware safety-triggered shutdown is required |
| STM32G031K8T6 | No integrated CAPSENSE™, requires external RC network and software library; 64 KB flash but only 8 KB SRAM | Requires additional design effort for touch robustness and lacks hardware water-tolerance compensation | Select when leveraging existing STM32 ecosystem and external touch ICs are acceptable |
Compared with CY8C4025LQI-S402, this part adds TCPWM kill signaling and 20 KB more flash for complex HMI logic; versus STM32G031K8T6, it delivers turnkey CAPSENSE™ with hardware SNR optimization and zero external components for touch.
Availability
CY8C4125LQI-S412T is available at Aetrix Electronics and suitable for industrial HMI panels, smart home appliance controls, portable medical sensor nodes, and automotive interior switches requiring stable component supply across multi-year production cycles.
Supply support for CY8C4125LQI-S412T 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 ISO/TS 16949 and ISO 9001.
This device belongs to the PSoC™ 4100S product line - designed specifically for embedded systems demanding integrated capacitive sensing, low-power operation, and field-programmable analog/digital resources in a single chip.
FAQ
Does CY8C4125LQI-S412T support USB connectivity?
No. The device does not include a USB PHY or USB controller. Communication is limited to its three SCBs (I²C, SPI, UART) and SWD debug interface. For USB host/device functionality, an external USB-to-UART bridge or companion USB MCU is required.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No. The 12-bit SAR ADC uses a single conversion core with hardware channel sequencing. It supports sequential sampling with programmable delays and signal averaging per channel, but not true simultaneous sampling across multiple inputs.
Is the CAPSENSE™ block certified for IEC 61000-4-3 and IEC 61000-4-6 immunity testing?
Yes. Infineon provides CAPSENSE™ design guides and reference layouts qualified to IEC 61000-4-3 (radiated immunity) and IEC 61000-4-6 (conducted immunity) up to Level 3. Certification documentation is included in the PSoC™ 4100S Design Guide (AN91182).
What debug interfaces are supported besides SWD?
Only SWD (Serial Wire Debug) is supported. There is no JTAG, SWO trace output, or UART-based bootloader interface built-in. Debugging and programming require an SWD-compatible probe (e.g., KitProg3, Segger J-Link) connected to SWDCLK and SWDIO pins.
CY8C4125LQI-S412T 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; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125LQI-S412T FAQ
1.How can I place an order for CY8C4125LQI-S412T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQI-S412T 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-S412T reliable?
The price and inventory of CY8C4125LQI-S412T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQI-S412T is usually 5 days.
3.What payment methods are accepted for CY8C4125LQI-S412T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQI-S412T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQI-S412T?
CY8C4125LQI-S412T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQI-S412T 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-S412T?
For technical support, including CY8C4125LQI-S412T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQI-S412T requirements.
6.How does Aetrix verify that CY8C4125LQI-S412T is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQI-S412T 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-S412T meets industry standards.
7.What is the process for return or replacement of CY8C4125LQI-S412T?
All CY8C4125LQI-S412T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQI-S412T, 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-S412T part is unused and in its original packaging.
Return procedure for CY8C4125LQI-S412T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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