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Infineon Technologies CY8C4125LQI-S433
- Part No.:
- CY8C4125LQI-S433
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 40-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQI-S433.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
CY8C4125LQI-S433 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 for I²C/SPI/UART, five TCPWM blocks, and 36 GPIOs-used in human-interface embedded systems requiring robust touch control and low-power operation.
For engineers reviewing the CY8C4125LQI-S433 datasheet, CY8C4125LQI-S433 pinout, CY8C4125LQI-S433 application, or CY8C4125LQI-S433 equivalent, key selection considerations include its 12-bit SAR ADC (1 Msps), dual opamps with Deep Sleep support, SmartSense auto-tuning for water-tolerant touch, programmable drive strength per GPIO, and compatibility with ModusToolbox™ and PSoC™ Creator toolchains.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with tightly coupled programmable analog (CTB opamps, SAR ADC, CSD sigma-delta engine) and digital (TCPWM, SCB, PLD) peripherals. Its clock system combines ±2% IMO, 32 kHz ILO, and WCO for precision timing across sleep/wake transitions.
Capacitive sensing uses a dedicated sigma-delta modulator achieving >5:1 SNR and hardware-accelerated SmartSense tuning-enabling reliable touch detection under moisture without host-CPU intervention. All GPIOs support CAPSENSE™, analog input, or digital I/O with configurable slew rate and drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply enables real-time control loop execution in motor or sensor fusion applications. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for firmware with CAPSENSE™ middleware, TCPWM motor control, and communication stacks. |
| ADC | 12-bit SAR @ 1 Msps with sequencer & averaging - supports multi-channel sensor acquisition with noise reduction in industrial monitoring. |
| Capacitive Sensing | Sigma-delta CSD with >5:1 SNR and SmartSense auto-tuning - delivers production-ready water-tolerant touch buttons/sliders without manual calibration. |
| Low-Power Mode | Deep Sleep @ 2.5 µA with active opamps/comparators - enables battery-powered devices with wake-on-touch capability. |
| Communication | 3 × SCBs supporting I²C/SPI/UART concurrently - allows simultaneous sensor interface (I²C), display control (SPI), and debug telemetry (UART). |
| PWM/Timing | 5 × 16-bit TCPWM blocks with quadrature decode & kill-input triggering - supports BLDC motor commutation and safety-critical edge-triggered shutdown. |
Pinout & Package
This device is housed in a 44-lead TQFP (7 mm × 7 mm, 0.8 mm pitch) package with exposed thermal pad. All 36 GPIOs are multifunctional and support CAPSENSE™, analog input/output, or digital I/O with programmable drive modes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.71–5.5 V operation; decoupling required per Infineon layout guidelines to maintain analog performance. |
| XRES | Active-low reset input | Asynchronous external reset with internal pull-up; compatible with pushbutton or supervisor IC assertion. |
| SWDCLK / SWDIO | ARM Serial Wire Debug interface | Two-pin debug port enabling programming, breakpoint debugging, and real-time variable inspection without halting CAPSENSE™ operation. |
| P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7], P4[0]–P4[3] | Programmable GPIO | Each pin configurable as CAPSENSE™ electrode, analog input (to SAR or CSD), opamp output, or digital signal with slew-rate control. |
| WCO_IN / WCO_OUT | 32.768 kHz crystal oscillator terminals | Supports external watch crystal for RTC accuracy; optional bypass to use internal ILO in low-cost designs. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two CTB opamps operate in Deep Sleep with selectable drive mode (high-bandwidth internal or high-drive external), enabling always-on sensor signal conditioning. |
| Hardware-Accelerated CAPSENSE™ | Dedicated sigma-delta modulator + SmartSense auto-tuning eliminates firmware calibration overhead and ensures consistent touch response across temperature/humidity. |
| Flexible Serial Peripherals | Three SCBs independently configured as I²C master/slave, SPI master/slave, or UART - no resource contention between interfaces. |
| Programmable Digital Logic | PLD blocks perform Boolean logic on GPIOs without CPU involvement - offloads simple state-machine tasks like LED sequencing or button debouncing. |
| Low-Power Timing | Five TCPWM blocks support center-aligned PWM for motor control and quadrature decoding for rotary encoders - all functional in Deep Sleep wake-up contexts. |
Applications
| Smart Home Touch Panel | Industrial HMI Keypad |
|---|---|
Use Scenario: Wall-mounted lighting control panel with moisture-prone surface exposure. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ button detection, LED dimming via TCPWM, and Zigbee/Wi-Fi co-processor communication via SCB UART. Use Value: SmartSense auto-tuning maintains reliable touch response during condensation; Deep Sleep current <2.5 µA extends battery life in wireless variants. |
Use Scenario: Factory-floor operator interface with ESD risk and glove operation requirement. IC Role / Device Role / Timing Role: Real-time HMI controller acquiring analog sensor data (temperature, pressure), driving segmented LCD, and managing CAN/I²C peripheral bus. Use Value: 12-bit SAR ADC with channel sequencer captures multi-sensor inputs in one trigger; GPIO drive strength configurable for noisy industrial environments. |
| Portable Medical Device UI | White Goods Control Board |
Use Scenario: Battery-powered glucose meter with capacitive touch buttons and analog biosensor front-end. IC Role / Device Role / Timing Role: Signal acquisition (biosensor → SAR ADC), touch UI (CAPSENSE™), and BLE communication (SCB UART + PSoC™ BLE component). Use Value: Dual opamps condition low-level biosensor signals in Deep Sleep; integrated IDACs enable precise transimpedance amplifier biasing. |
Use Scenario: Washing machine main control board requiring motor phase control and water-level sensing. IC Role / Device Role / Timing Role: Motor commutation (TCPWM + comparator kill-input), water-level capacitive sensing (CSD), and appliance status display (LCD segment drive). Use Value: Hardware-triggered PWM kill signal prevents overcurrent damage; CSD achieves >5:1 SNR for stable water-level detection through plastic housing. |
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-S412 | Lower memory (32 KB flash / 4 KB SRAM); no SmartSense; same 44L TQFP package. | Limited to simpler touch UIs without complex sensor fusion or large middleware stacks. | Select when cost sensitivity outweighs need for auto-tuning or extended memory headroom. |
| STM32G031K8T6 | Arm Cortex-M0+, 64 KB flash, but lacks integrated CAPSENSE™, programmable analog, and hardware CSD engine. | Requires external touch controller or software-based capacitive sensing with higher CPU load and lower SNR. | Choose only if existing STM32 toolchain familiarity and ecosystem outweigh need for hardware-accelerated touch. |
Compared with CY8C4125LQI-S433, CY8C4025LQI-S412 reduces BOM cost but sacrifices SmartSense and memory scalability, while STM32G031K8T6 demands external components and firmware effort to match basic touch functionality-making CY8C4125LQI-S433 optimal for integrated, production-ready capacitive HMI designs.
Availability
CY8C4125LQI-S433 is available at Aetrix Electronics and suitable for smart home interfaces, industrial HMIs, portable medical devices, and white goods control boards requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4125LQI-S433 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, sensing, and microcontroller solutions for industrial, automotive, and IoT applications.
CY8C4125LQI-S433 belongs to the PSoC™ 4100S product line-designed specifically for embedded human-interface applications demanding integrated capacitive touch, low-power operation, and field-programmable analog/digital resources.
FAQ
Does CY8C4125LQI-S433 support USB connectivity?
No. This device does not include a USB PHY or USB controller. Communication is limited to I²C, SPI, UART, and CAN (via external transceiver). For USB-enabled designs, Infineon's PSoC™ 4000S or PSoC™ 6 families provide native USB support, but CY8C4125LQI-S433 relies on external bridge ICs if USB host/peripheral functionality is required.
What development tools are officially supported for CY8C4125LQI-S433?
Infineon officially supports two IDEs: PSoC™ Creator (legacy schematic-based design) and ModusToolbox™ (modern Eclipse-based environment with HAL drivers and middleware). Both include CAPSENSE™ Tuner, TCPWM configurator, and SCB setup wizards. Debugging requires KitProg3 or MiniProg4 programmers compatible with SWD interface.
Can the SAR ADC and CSD operate simultaneously without interference?
Yes. The 12-bit SAR ADC and sigma-delta CSD use independent analog routing paths and clock domains. Infineon's hardware design isolates their reference voltages and sampling circuits, allowing concurrent operation-e.g., measuring temperature via SAR while scanning touch buttons via CSD-without measurable crosstalk or timing conflict.
Is the 44L TQFP package RoHS-compliant and lead-free?
Yes. CY8C4125LQI-S433 in 44L TQFP packaging meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3). The device uses lead-free matte tin finish on pins and complies with IPC/JEDEC J-STD-006 solderability requirements for both reflow and wave soldering processes.
CY8C4125LQI-S433 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 40-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:
- 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 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-S433 FAQ
1.How can I place an order for CY8C4125LQI-S433 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQI-S433 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-S433 reliable?
The price and inventory of CY8C4125LQI-S433 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQI-S433 is usually 5 days.
3.What payment methods are accepted for CY8C4125LQI-S433?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQI-S433 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQI-S433?
CY8C4125LQI-S433 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQI-S433 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-S433?
For technical support, including CY8C4125LQI-S433 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQI-S433 requirements.
6.How does Aetrix verify that CY8C4125LQI-S433 is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQI-S433 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-S433 meets industry standards.
7.What is the process for return or replacement of CY8C4125LQI-S433?
All CY8C4125LQI-S433 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQI-S433, 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-S433 part is unused and in its original packaging.
Return procedure for CY8C4125LQI-S433:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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