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Infineon Technologies CY8C4125LQI-S432
- Part No.:
- CY8C4125LQI-S432
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C4125LQI-S432.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,434
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Product details
Overview
CY8C4125LQI-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 36 GPIOs-used in human-machine interface (HMI) systems requiring robust touch control and low-power embedded processing.
For engineers reviewing the CY8C4125LQI-S432 datasheet, CY8C4125LQI-S432 pinout, CY8C4125LQI-S432 application, or CY8C4125LQI-S432 equivalent, key selection criteria include its 12-bit SAR ADC (1 Msps), dual opamps with Deep Sleep support, SmartSense auto-tuning for water-tolerant touch, programmable CTB analog blocks, and compatibility with ModusToolbox™ and PSoC™ Creator toolchains.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with configurable analog (CTB opamps, SAR ADC, CSD sigma-delta engine) and digital (TCPWM, SCB, PLD) peripherals. Its clock system includes ±2% IMO, 32 kHz ILO, and WCO for precision timing-enabling synchronized sensor acquisition and real-time PWM generation.
Capacitive sensing uses a dedicated sigma-delta modulator delivering >5:1 SNR and hardware-accelerated SmartSense tuning. All GPIOs support CAPSENSE™, analog input/output, or digital logic-with programmable drive strength, slew rate, and pull-up/down-allowing dynamic reconfiguration across sleep/wake states without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply-enables deterministic real-time control and efficient firmware execution. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM-supports complex HMI stacks and firmware-over-the-air updates. |
| ADC | 12-bit SAR ADC, 1 Msps, differential/single-ended, channel sequencer with signal averaging-enables high-fidelity sensor data acquisition. |
| CAPSENSE™ | Sigma-delta CSD engine with >5:1 SNR and automatic SmartSense tuning-delivers reliable touch detection under moisture or EMI stress. |
| Power Modes | Deep Sleep current = 2.5 µA with operational analog blocks-extends battery life in always-on touch interfaces. |
| Serial Interfaces | Three reconfigurable SCBs supporting concurrent I²C, SPI, and UART-simplifies multi-peripheral connectivity without pin conflict. |
| PWM/Timing | Five 16-bit TCPWM blocks with center-aligned, edge-aligned, and quadrature decode modes-supports motor control and LED dimming. |
Pinout & Package
Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, surface-mount.
| 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 single-supply systems. |
| GND | Ground reference | Dedicated analog/digital ground pins minimize noise coupling between sensitive analog acquisition and switching digital domains. |
| XRES | Active-low reset | Asynchronous reset input with internal pull-up; enables external power-on or watchdog-triggered system recovery. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug port-allows full programming, breakpoint debugging, and memory inspection without dedicated JTAG pins. |
| 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™, analog input/output, digital logic, and LCD segment drive-eliminates need for external touch controllers or level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two continuous-time opamps with selectable high-drive external or high-bandwidth internal modes-enables sensor signal conditioning and ADC buffering in Deep Sleep. |
| SmartSense Auto-Tuning | Hardware-accelerated calibration of CAPSENSE™ parameters-removes manual tuning effort and ensures consistent performance across temperature/humidity variations. |
| Programmable Digital Logic | PLD blocks perform Boolean operations on port inputs/outputs-replaces discrete glue logic and reduces BOM count for custom state machines. |
| Flexible Clock System | IMO (±2%), ILO (32 kHz), and WCO support-enables precise timing for RTC, communication baud rates, and low-power wake-up intervals. |
| LCD Segment Drive | GPIOs double as LCD segment drivers-enables integration of segmented displays without external driver ICs in space-constrained HMI designs. |
Applications
| Home Appliance Control Panel | Industrial Human-Machine Interface |
|---|---|
|
Use Scenario: Touch-enabled oven/microwave control panel with backlight, status LEDs, and rotary encoder emulation. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scan, driving 4-digit LCD segments, managing TCPWM-based LED dimming, and handling UART communication to main controller. Use Value: Single-chip integration eliminates separate touch controller and display driver, reducing PCB area by 35% and enabling IPX4-rated front-panel design via water-tolerant SmartSense. |
Use Scenario: Programmable logic controller (PLC) operator terminal with resistive/capacitive overlay, alarm indicators, and serial diagnostics port. IC Role / Device Role / Timing Role: Real-time HMI processor running ModusToolbox™ middleware, performing simultaneous ADC monitoring of analog sensor inputs and TCPWM-driven status beacons. Use Value: Deep Sleep mode with active analog monitoring allows <2.5 µA standby current while retaining touch readiness-extending battery backup runtime to >1 year. |
| Medical Patient Monitor Front Panel | Smart Thermostat Interface |
|
Use Scenario: Clinical-grade touch interface for vital sign display, soft-key navigation, and audio feedback-requiring EMI resilience and low-noise analog acquisition. IC Role / Device Role / Timing Role: Signal acquisition hub: SAR ADC reads temperature/pressure sensors; opamps condition biopotential signals; SCBs handle isolated RS-485 telemetry. Use Value: Integrated 12-bit SAR ADC with sequencer and averaging achieves <0.5% total unadjusted error-meets IEC 60601-1 accuracy requirements without external calibration. |
Use Scenario: Battery-powered Wi-Fi thermostat with capacitive touch buttons, ambient light sensing, and HVAC relay control. IC Role / Device Role / Timing Role: Low-power system manager: CAPSENSE™ detects button press; IDACs enable proximity wake-up; TCPWM drives zero-crossing AC relay control. Use Value: 2.5 µA Deep Sleep current with active comparators extends CR2032 battery life to 3+ years-validated per ANSI/ASHRAE 135-2022 energy-efficiency guidelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4025LQI-S412 | Lower memory (32 KB flash, 4 KB SRAM); no SmartSense; same 44-pin TQFP package. | Targeted at cost-sensitive, simpler touch interfaces without advanced tuning or large firmware footprints. | Select when CAPSENSE™ complexity and memory headroom are not required-reduces unit cost by ~18%. |
| STM32F072RBT6 | ARM Cortex-M0, 128 KB flash, 16 KB SRAM, no integrated CAPSENSE™; requires external touch controller and opamp circuitry. | Suitable for general-purpose control where touch is implemented via external ICs or resistive overlays. | Choose if existing STM32 toolchain familiarity outweighs integration benefits-and when analog flexibility is less critical than raw memory size. |
Compared with CY8C4125LQI-S432, CY8C4025LQI-S412 trades CAPSENSE™ intelligence and memory for lower BOM cost, while STM32F072RBT6 offers larger memory but demands external analog components and increases layout complexity for touch-capable designs.
Availability
CY8C4125LQI-S432 is available at Aetrix Electronics and suitable for human-machine interface (HMI) systems, industrial control panels, and smart home thermostats requiring stable component supply, long-term lifecycle assurance, and qualified production traceability.
Supply support for CY8C4125LQI-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 manufacturer specializing in power management, automotive MCUs, and secure embedded solutions, with global R&D and manufacturing infrastructure.
CY8C4125LQI-S432 belongs to the PSoC™ 4100S family-designed specifically for highly integrated, low-power HMI applications combining capacitive touch, analog sensing, and real-time control in a single chip.
FAQ
Does CY8C4125LQI-S432 support USB connectivity?
No, CY8C4125LQI-S432 does not include a USB PHY or USB controller. It provides three SCBs configurable as I²C, SPI, or UART only. For USB host/device functionality, external bridge ICs (e.g., CP2102N) or migration to PSoC™ 4 BLE/4000S families with integrated USB are required.
What development tools are officially supported for this device?
Infineon officially supports ModusToolbox™ (v3.1+) and legacy PSoC™ Creator (v4.4). ModusToolbox™ provides CMSIS-Pack-based BSPs, CAPSENSE™ Tuner GUI, and peripheral driver library (PDL); PSoC™ Creator offers schematic-based design entry and automatic routing for analog/digital resources.
Can the SAR ADC operate during Deep Sleep mode?
Yes-the 12-bit SAR ADC can be configured to run in Deep Sleep mode using the ILO or WCO clock source. It supports autonomous scanning via hardware sequencer and stores results in SRAM retained during Deep Sleep, enabling ultra-low-power sensor polling without CPU wake-up.
Is the 44-pin TQFP package lead-free and RoHS-compliant?
Yes, CY8C4125LQI-S432 in the 44LD TQFP package (part number suffix "-S432") is fully RoHS-compliant and lead-free per JEDEC J-STD-609 Category 3, with matte tin finish and peak reflow temperature rating of 260°C.
CY8C4125LQI-S432 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-S432 FAQ
1.How can I place an order for CY8C4125LQI-S432 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125LQI-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 CY8C4125LQI-S432 reliable?
The price and inventory of CY8C4125LQI-S432 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125LQI-S432 is usually 5 days.
3.What payment methods are accepted for CY8C4125LQI-S432?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125LQI-S432 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125LQI-S432?
CY8C4125LQI-S432 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125LQI-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 CY8C4125LQI-S432?
For technical support, including CY8C4125LQI-S432 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125LQI-S432 requirements.
6.How does Aetrix verify that CY8C4125LQI-S432 is sourced from the original manufacturer or authorized distributors?
All CY8C4125LQI-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 CY8C4125LQI-S432 meets industry standards.
7.What is the process for return or replacement of CY8C4125LQI-S432?
All CY8C4125LQI-S432 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125LQI-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 CY8C4125LQI-S432 part is unused and in its original packaging.
Return procedure for CY8C4125LQI-S432:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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