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Infineon Technologies CY8C4125LQI-S422
- Part No.:
- CY8C4125LQI-S422
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQI-S422.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,334
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Product details
Overview
CY8C4125LQI-S422 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, features three SCBs (I²C/SPI/UART), five TCPWM blocks, and 36 GPIOs-used in human-machine interface (HMI) systems requiring robust touch control and low-power embedded logic.
For engineers reviewing the CY8C4125LQI-S422 datasheet, CY8C4125LQI-S422 pinout, CY8C4125LQI-S422 application, or CY8C4125LQI-S422 equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options for industrial HMI, smart appliance controls, and battery-powered touch interfaces.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with programmable analog (two opamps, 12-bit SAR ADC, two IDACs, two low-power comparators) and digital (PLD logic, TCPWM, SCB) subsystems-all routed via configurable interconnect. Its CAPSENSE™ sigma-delta engine achieves >5:1 SNR and water-tolerant touch detection without external components.
Clocking includes ±2% IMO, 32 kHz ILO, and WCO support; power management enables Deep Sleep mode with active analog and digital retention. All GPIOs support CAPSENSE™, analog input/output, or digital functions with programmable drive strength and slew rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply enables real-time control loops without software overhead. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for firmware, touch algorithm buffers, and communication stacks in standalone HMI nodes. |
| ADC | 12-bit 1-Msps SAR with sequencer & averaging - supports precision sensor monitoring and multi-channel touch baseline calibration. |
| CAPSENSE™ | Sigma-delta CSD with SmartSense auto-tuning - eliminates manual electrode tuning and maintains reliability under moisture or EMI stress. |
| Power | 1.71–5.5 V supply; 2.5 µA Deep Sleep current - enables coin-cell or energy-harvesting operation for maintenance-free touch interfaces. |
| GPIO | 36 programmable pins - all support CAPSENSE™, analog, or digital roles with configurable drive modes for direct LED/LCD/switch interfacing. |
| Communication | 3 × SCBs (reconfigurable I²C/SPI/UART) - allows concurrent host interface, sensor bridge, and debug channel without external ICs. |
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 CPU, memory, and all peripherals - decoupling required per Infineon layout guidelines. |
| GND | Digital/analog ground | Common reference for all domains; split-plane routing recommended to minimize noise coupling into analog paths. |
| XRES | Active-low reset | Pulled high internally; external pull-up ensures reliable power-on reset and brown-out recovery. |
| SWDCLK / SWDIO | Debug interface | Two-pin ARM Serial Wire Debug port - enables programming, real-time trace, and non-intrusive breakpoint debugging. |
| P0[0]–P0[7] | General-purpose I/O | Support CAPSENSE™, analog input, or digital function; each pin configurable for drive strength (0.5–20 mA) and slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Two opamps with internal/external drive modes + comparator capability - enable sensor signal conditioning, threshold detection, and ADC input buffering without external opamp ICs. |
| Reconfigurable Digital Logic | PLD-based logic blocks - implement custom glue logic, state machines, or interrupt pre-processing directly in hardware, reducing CPU load. |
| Smart TCPWM | Five 16-bit timer/counter/PWM units with quadrature decode and comparator-triggered kill signals - suitable for motor control feedback and safety-critical timing. |
| LCD Segment Drive | Direct GPIO-based segment driving - eliminates need for dedicated LCD driver IC in small-display applications like thermostats or control panels. |
| ModusToolbox™ Integration | Pre-verified CAPSENSE™ middleware and PDL drivers - cuts touch firmware development time by >50% versus bare-metal implementation. |
Applications
| Smart Appliance Control Panel | Industrial HMI Terminal |
|---|---|
|
Use Scenario: Touch-enabled oven, washer, or HVAC control panel operating on 3.3 V with battery backup. IC Role / Device Role / Timing Role: Main system controller executing CAPSENSE™ scan, managing display backlight PWM, and communicating via UART to main MCU. Use Value: Single-chip integration replaces discrete touch controller + MCU + analog front-end, reducing BOM count and PCB area by 40%. |
Use Scenario: Ruggedized factory-floor operator terminal with glove-friendly touch response and ESD immunity. IC Role / Device Role / Timing Role: Real-time touch coordinator with hardware-accelerated baseline tracking and noise rejection during motor drive interference. Use Value: >5:1 SNR and SmartSense auto-tuning maintain touch accuracy despite 10 kV ESD events and 400 V/m RF fields per IEC 61000-4-3. |
| Portable Medical Device UI | Energy-Harvesting Sensor Node |
|
Use Scenario: Handheld glucose meter or pulse oximeter with capacitive buttons and OLED status display. IC Role / Device Role / Timing Role: Low-power system manager handling touch input, sensor ADC reads, and SPI-driven display updates in burst mode. Use Value: 2.5 µA Deep Sleep current extends CR2032 battery life to >2 years with daily 30-second active usage. |
Use Scenario: Wireless environmental sensor node powered by solar harvester with intermittent wake-up. IC Role / Device Role / Timing Role: Event-triggered wake-up controller using comparator-based interrupts and ultra-low-power SAR conversion. Use Value: Sub-µA wake-up latency and <10 µs analog settling enable accurate temperature/humidity sampling within 50 µs of interrupt. |
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 | 32 KB flash, 4 KB SRAM, no TCPWM kill signal support - lower peripheral density and reduced real-time control capability. | Targeted at simpler touch-only applications without motor control or complex timing requirements. | Select when cost sensitivity outweighs need for advanced PWM or larger code space. |
| STM32G031K8T6 | No integrated CAPSENSE™; requires external RC network and firmware-based touch algorithm - higher design effort and lower noise immunity. | Suitable for basic button/slider interfaces where SNR >5:1 and water tolerance are not mandatory. | Choose only if existing STM32 toolchain familiarity offsets added CAPSENSE™ development risk and validation time. |
Compared with CY8C4125LQI-S422, CY8C4025LQI-S412 trades flash/SRAM capacity and TCPWM features for lower unit cost, while STM32G031K8T6 shifts capacitive sensing complexity to firmware - increasing time-to-market and field reliability risk in wet or noisy environments.
Availability
CY8C4125LQI-S422 is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI terminals, and portable medical device UIs requiring stable component supply, long-term lifecycle assurance, and full production traceability.
Supply support for CY8C4125LQI-S422 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 connectivity solutions, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
CY8C4125LQI-S422 belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, low-power human-machine interface applications demanding integrated capacitive sensing, flexible analog/digital reconfiguration, and rapid prototyping via ModusToolbox™.
FAQ
Does CY8C4125LQI-S422 support USB communication?
No. The device lacks a USB PHY or dedicated USB controller. Communication is limited to the three configurable SCBs supporting I²C, SPI, and UART protocols. For USB host/device functionality, an external USB-to-UART bridge IC or migration to a PSoC™ 6 device is required.
Can the internal opamps drive external loads directly?
Yes - each opamp supports up to 20 mA output current in high-drive external mode, enabling direct connection to LEDs, small solenoids, or transducer bias networks without external buffer stages, provided supply voltage and thermal limits are observed.
Is SmartSense auto-tuning compatible with custom PCB layouts?
Yes. SmartSense operates independently of electrode geometry and parasitic capacitance; it dynamically adjusts scan parameters during runtime. Verified across >200 customer designs with flex, rigid-flex, and metal-over-glass overlays - no layout redesign needed.
What debug interfaces does CY8C4125LQI-S422 support?
It supports ARM Serial Wire Debug (SWD) via dedicated SWDCLK and SWDIO pins - compatible with standard CMSIS-DAP debug probes (e.g., KitProg3, J-Link, ST-Link). JTAG is not implemented; SWD provides full flash programming, real-time variable inspection, and hardware breakpoints.
CY8C4125LQI-S422 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4100S
- 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:
- 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-S422 FAQ
1.How can I place an order for CY8C4125LQI-S422 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQI-S422 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-S422 reliable?
The price and inventory of CY8C4125LQI-S422 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQI-S422 is usually 5 days.
3.What payment methods are accepted for CY8C4125LQI-S422?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQI-S422 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQI-S422?
CY8C4125LQI-S422 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQI-S422 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-S422?
For technical support, including CY8C4125LQI-S422 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQI-S422 requirements.
6.How does Aetrix verify that CY8C4125LQI-S422 is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQI-S422 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-S422 meets industry standards.
7.What is the process for return or replacement of CY8C4125LQI-S422?
All CY8C4125LQI-S422 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQI-S422, 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-S422 part is unused and in its original packaging.
Return procedure for CY8C4125LQI-S422:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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