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Infineon Technologies CY8C4125LQQ-S432
- Part No.:
- CY8C4125LQQ-S432
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQQ-S432.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
CY8C4125LQQ-S432 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 operates across 1.71–5.5 V for embedded human-interface and industrial control applications.
For engineers reviewing the CY8C4125LQQ-S432 datasheet, CY8C4125LQQ-S432 pinout, CY8C4125LQQ-S432 application, or CY8C4125LQQ-S432 equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-context insights for rapid integration into touch-enabled, low-power embedded systems.
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 analog peripherals remain operational in Deep Sleep mode, enabling always-on capacitive sensing with <2.5 µA system current.
Its clock system includes ±2% IMO, 32 kHz ILO, and WCO support; GPIOs are fully reconfigurable for CAPSENSE™, analog, or digital roles with programmable drive strength and slew rate. The 48-pin TQFP package maps all 36 GPIOs plus dedicated debug (SWD) and reset pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply, deterministic real-time execution for sensor fusion and motor control loops. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for ModusToolbox™-based firmware with CAPSENSE™ middleware and communication stacks. |
| Analog Peripherals | 12-bit 1-Msps SAR ADC + two opamps + two IDACs + two low-power comparators - enables simultaneous signal conditioning, measurement, and capacitive sensing without external components. |
| Digital Peripherals | Three SCBs (I²C/SPI/UART), five TCPWM blocks, programmable logic - supports multi-protocol connectivity and precise PWM timing for LED dimming or motor commutation. |
| Power & Sleep | 1.71–5.5 V operation; Deep Sleep current = 2.5 µA with active analog - allows battery-powered touch interfaces to run >1 year on coin cell. |
| CAPSENSE™ | Sigma-delta CSD with SmartSense auto-tuning and >5:1 SNR - delivers robust water-tolerant touch detection on curved or coated surfaces. |
| Package | 48-pin TQFP (LQQ) - 7×7 mm body, 0.5 mm pitch, compatible with standard PCB assembly and thermal management for industrial environments. |
Pinout & Package
48-pin TQFP (LQQ) package with exposed thermal pad; 36 GPIOs support CAPSENSE™, analog input/output, or digital logic functions. SWDIO/SWCLK pins enable debug and programming; XRES provides hardware reset.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 1.71–5.5 V power domain; decoupling required per Infineon layout guidelines for noise-sensitive analog operation. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin ARM-standard debug path for firmware loading, real-time tracing, and runtime register inspection without halting CPU. |
| XRES | Active-low reset input | Asynchronous hardware reset; internal pull-up ensures reliable startup after power ramp; compatible with pushbutton or supervisor IC assertion. |
| P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7], P4[0]–P4[3] | Programmable GPIO | All 36 pins support CAPSENSE™ electrode, analog input (SAR/IDAC), comparator input, or digital I/O with configurable drive strength (2–12 mA) and slew rate. |
| XTAL_IN / XTAL_OUT | 32 kHz watch crystal oscillator terminals | Supports precision RTC timing; requires external 32.768 kHz crystal and load capacitors; optional for low-power timekeeping in Deep Sleep. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Subsystem | Two opamps operate in high-drive external or high-bandwidth internal modes with ADC input buffering - eliminates need for external opamp buffers in sensor front-ends. |
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration adjusts sensitivity and baseline in real time - removes manual tuning effort and improves production yield across panel variance. |
| Deep Sleep with Active Analog | 2.5 µA system current while maintaining opamp, comparator, and CSD functionality - enables wake-on-touch with sub-100 ms latency and zero firmware overhead. |
| Run-Time Reconfigurable SCBs | Three serial blocks dynamically switch between I²C, SPI, and UART protocols via firmware - reduces BOM count and simplifies multi-peripheral communication routing. |
| Programmable Digital Logic | Boolean logic blocks process port inputs/outputs without CPU intervention - offloads debounce, edge detection, or state-machine logic from firmware. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
|
Use Scenario: Capacitive touch buttons and sliders on washing machine or oven control panels exposed to moisture and cleaning agents. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ firmware, managing display backlight PWM, and communicating via I²C to system controller. Use Value: Water-tolerant sigma-delta sensing with >5:1 SNR ensures reliable operation under condensation; Deep Sleep extends battery backup life during standby. |
Use Scenario: Ruggedized operator terminal with glove-compatible touch overlay in factory automation settings. IC Role / Device Role / Timing Role: Real-time touch processor interfacing with PLC via UART, driving segmented LCD, and monitoring safety inputs via GPIO. Use Value: Programmable drive strength (up to 12 mA) supports long traces to remote sensors; TCPWM blocks generate precise 1–100 kHz PWM for LED indicators. |
| Medical Device Keypad | Smart Building Sensor Node |
|
Use Scenario: Disinfectant-resistant touch interface on portable diagnostic equipment requiring ESD immunity and low leakage. IC Role / Device Role / Timing Role: CAPSENSE™ acquisition engine with hardware averaging, coupled with SAR ADC for temperature/humidity sensor readout. Use Value: Integrated 12-bit SAR ADC with differential mode rejects common-mode noise from adjacent medical electronics; opamp buffer enables direct thermistor connection. |
Use Scenario: Battery-powered occupancy/light-level node with touch wake, ambient light sensing, and BLE host interface. IC Role / Device Role / Timing Role: Low-power system controller managing sleep/wake cycles, analog sensor acquisition, and UART-to-BLE bridge firmware. Use Value: 2.5 µA Deep Sleep current enables >2-year operation on CR2032; IDACs drive capacitive proximity detection without external bias circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4126AZI-S433 | Same PSoC™ 4100S family, but in 44-pin QFN package with identical peripherals and memory; lacks WCO pins. | Preferred for space-constrained PCBs where crystal-less RTC is acceptable; no external 32 kHz crystal required. | Select when board area is critical and precise low-power timekeeping is not needed. |
| STM32G031F8P6 | Arm® Cortex®-M0+, 64 MHz, 64 KB flash, 8 KB SRAM, but no integrated CAPSENSE™ or programmable analog; requires external touch controller. | Suitable for cost-sensitive designs where touch is implemented via discrete IC or omitted entirely. | Choose only if CAPSENSE™ and reconfigurable analog are unnecessary and BOM cost reduction outweighs design flexibility loss. |
Compared with CY8C4125LQQ-S432, CY8C4126AZI-S433 trades WCO support for smaller footprint and lower thermal resistance, while STM32G031F8P6 sacrifices integrated capacitive sensing and analog configurability for broader ecosystem tooling - making CY8C4125LQQ-S432 optimal for touch-first, low-power embedded systems requiring hardware-level analog/digital co-design.
Availability
CY8C4125LQQ-S432 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI interfaces, medical device keypads, and smart building sensor nodes requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4125LQQ-S432 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 leader specializing in power management, sensing, security, and microcontroller solutions for industrial, automotive, and IoT markets.
CY8C4125LQQ-S432 belongs to the PSoC™ 4100S product line - designed specifically for highly integrated, low-power human-interface applications combining capacitive touch, analog signal processing, and real-time control in a single chip.
FAQ
Does CY8C4125LQQ-S432 support USB connectivity?
No. CY8C4125LQQ-S432 does not include a USB PHY or USB controller. It provides three SCBs configurable as I²C, SPI, or UART only. For USB host or device functionality, an external USB-to-UART bridge (e.g., CP2102N) or companion MCU with USB support is required.
What development tools are officially supported for CY8C4125LQQ-S432?
Infineon officially supports ModusToolbox™ (v3.x+) and legacy PSoC™ Creator (v4.4). ModusToolbox™ provides Eclipse-based IDE, BSPs, PDL drivers, CAPSENSE™ Tuner, and middleware; PSoC™ Creator offers schematic-driven design with automatic analog/digital routing and API component library.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No. The 12-bit SAR ADC has a single conversion core with a channel sequencer supporting up to 16 channels in automatic scan mode, but it performs sequential conversions - not true simultaneous sampling. Differential mode is supported per channel, and hardware signal averaging reduces noise across repeated samples.
Is the 48-pin TQFP package RoHS-compliant and lead-free?
Yes. CY8C4125LQQ-S432 in 48-pin TQFP (LQQ) packaging meets RoHS Directive 2011/65/EU and is lead-free (Pb-free), with JEDEC-standard matte tin finish on leads and compliant with IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3).
CY8C4125LQQ-S432 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C4100S Plus
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 24MHz
- Connectivity:
- FIFO, I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, CapSense, LCD, POR, PWM, Temp Sensor, 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 SAR, 16x12b Sigma-Delta; D/A 2x7/8b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125LQQ-S432 FAQ
1.How can I place an order for CY8C4125LQQ-S432 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQQ-S432 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 CY8C4125LQQ-S432 reliable?
The price and inventory of CY8C4125LQQ-S432 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQQ-S432 is usually 5 days.
3.What payment methods are accepted for CY8C4125LQQ-S432?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQQ-S432 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQQ-S432?
CY8C4125LQQ-S432 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQQ-S432 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 CY8C4125LQQ-S432?
For technical support, including CY8C4125LQQ-S432 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQQ-S432 requirements.
6.How does Aetrix verify that CY8C4125LQQ-S432 is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQQ-S432 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 CY8C4125LQQ-S432 meets industry standards.
7.What is the process for return or replacement of CY8C4125LQQ-S432?
All CY8C4125LQQ-S432 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQQ-S432, 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 CY8C4125LQQ-S432 part is unused and in its original packaging.
Return procedure for CY8C4125LQQ-S432:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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