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Infineon Technologies CY8C4125FNI-PS423T
- Part No.:
- CY8C4125FNI-PS423T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 45-XFBGA, WLCSP
- Datasheet:
-
CY8C4125FNI-PS423T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 45WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
CY8C4125FNI-PS423T from Infineon is a PSoC™ 4100PS programmable system-on-chip based on Arm® Cortex®-M0+ CPU (48 MHz), featuring 32 KB flash, 4 KB SRAM, dual ADCs (12-bit SAR + 10-bit single-slope), CAPSENSE™ CSD capacitive sensing, and three configurable serial communication blocks (I²C/SPI/UART). It targets embedded human-interface and sensor-fusion applications requiring integrated analog front-end and low-power operation.
For engineers reviewing the CY8C4125FNI-PS423T datasheet, CY8C4125FNI-PS423T pinout, CY8C4125FNI-PS423T application, or CY8C4125FNI-PS423T equivalent, key selection criteria include its 48-pin QFN package, Deep-Sleep current (2.5 µA), CAPSENSE™ SNR performance, programmable GPIO drive modes, and Smart I/O Boolean logic capability.
Technical Context
The device integrates a 32-bit Arm® Cortex®-M0+ core with dedicated hardware accelerators for CAPSENSE™ Sigma-Delta modulation and Smart I/O pin-level Boolean operations. Its analog subsystem includes two independent CTB opamps, four programmable analog blocks, and dual DACs (13-bit VDAC + 7-bit IDAC) supporting simultaneous AFE and capacitive sensing on shared pins.
Digital peripherals are fully reconfigurable: three SCBs support run-time switching between I²C, SPI, and UART protocols; eight TCPWM blocks offer center-aligned PWM, quadrature decoding, and pseudo-random modulation; and the eight-channel descriptor-based DMA enables zero-CPU-overhead data movement between peripherals and memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ up to 48 MHz - deterministic real-time execution with Thumb-2 instruction set and NVIC interrupt controller |
| Memory | 32 KB flash (with read accelerator) + 4 KB SRAM - supports firmware updates via bootloader and low-latency peripheral access |
| Analog Converters | 12-bit SAR ADC (1 Msps) + 10-bit single-slope ADC - enables simultaneous high-speed and high-resolution signal acquisition |
| CAPSENSE™ | 4th-gen Sigma-Delta (CSD) engine with SmartSense™ auto-tuning - delivers >100 dB SNR and robust water-tolerant touch detection |
| DACs | Two 13-bit voltage DACs + two 7-bit current DACs - supports precision biasing, sensor excitation, and IDAC-driven CAPSENSE™ |
| GPIO | Up to 38 programmable pins with configurable drive strength, slew rate, and Smart I/O Boolean logic - eliminates external glue logic for signal conditioning |
| Power Range | 1.71 V to 5.5 V operation - enables direct interface with 3.3 V and 5 V systems without level-shifting |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per Infineon datasheet Rev. *F (pages 16–19).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 1.71–5.5 V; powers digital core, analog blocks, and I/O banks |
| VSS | Ground reference | Primary digital/analog return path; requires low-impedance PCB connection to thermal pad |
| P0[0]–P0[7] | Programmable GPIO bank | Support CAPSENSE™, analog mux input, SCB SDA/SCL, or Smart I/O logic function |
| P1[0]–P1[7] | Programmable GPIO bank | Configurable as TCPWM outputs, ADC inputs, or WCO crystal connections |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; debounced by hardware for reliable startup |
| SWDCK / SWDIO | ARM Serial Wire Debug interface | Enables in-circuit programming and real-time debugging without dedicated JTAG pins |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Four CTB opamps + two LP comparators + 38-channel analog mux - enables custom AFE design without external components |
| CAPSENSE™ CSD Engine | Hardware-accelerated sigma-delta modulation with automatic SmartSense™ tuning - reduces firmware development time for robust touch UI |
| Smart I/O Logic | Eight pins support Boolean operations (AND/OR/XOR/NOT) at pin level - replaces discrete logic gates for signal preprocessing |
| Descriptor-Based DMA | Eight-channel controller with scatter-gather support - enables autonomous ADC-to-memory or SCB-to-TCPWM data transfers |
| Deep-Sleep Mode | 2.5 µA system current with active analog (ADC, comparators) and WCO running - extends battery life in always-on sensing nodes |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
Use Scenario: Capacitive touch buttons and sliders on microwave oven or washing machine control panel operating in humid environments. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ CSD algorithm, managing display backlight via PWM, and communicating with main controller over I²C. Use Value: Water-tolerant touch detection (>100 dB SNR) and 2.5 µA Deep-Sleep current enable reliable operation and multi-year battery life in cordless remotes. | Use Scenario: Operator terminal with segmented LCD and tactile feedback in factory automation equipment. IC Role / Device Role / Timing Role: System controller handling CAPSENSE™ input, driving 4-bit-per-pin LCD segments in Deep-Sleep, and logging sensor data via UART to PLC. Use Value: Integrated LCD drive with memory retention during Deep-Sleep eliminates external display controller, reducing BOM count and PCB area. |
| Portable Medical Sensor Node | Smart Lighting Dimmer Module |
Use Scenario: Wearable pulse oximeter using analog front-end to condition photodiode signals and perform ADC conversion. IC Role / Device Role / Timing Role: Signal acquisition MCU with dual ADCs (SAR for fast sampling, single-slope for low-noise DC), VDAC for LED bias control, and IDAC for current sourcing. Use Value: On-chip 13-bit VDAC and 7-bit IDAC eliminate external precision DACs, enabling compact, calibrated optical sensing with <1% gain error. | Use Scenario: DALI-compatible dimmer module controlling LED drivers via PWM and monitoring line voltage/current. IC Role / Device Role / Timing Role: Digital controller implementing DALI protocol stack in SCB, generating center-aligned PWM for smooth dimming, and measuring AC parameters via ADC. Use Value: Three SCBs allow concurrent DALI communication, UART debug, and I²C sensor interface - no external protocol bridge required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4126FNI-PS423T | Same package and core; adds 8 KB flash (40 KB total) and 8 KB SRAM (12 KB total) | Better suited for larger firmware images and complex CAPSENSE™ + BLE coexistence stacks | Select when firmware size exceeds 32 KB or multi-threaded RTOS usage requires >4 KB RAM |
| CY8C4247FNI-PS423T | Same footprint; adds Bluetooth Low Energy (BLE) radio and 256 KB flash | Enables wireless connectivity without external transceiver; higher RF layout complexity | Select only if BLE 5.0 stack integration and OTA updates are mandatory |
Compared with CY8C4125FNI-PS423T, the CY8C4126 variant offers scalable memory for future firmware growth, while CY8C4247 trades analog flexibility for integrated BLE - making CY8C4125 optimal for cost-sensitive, wired, analog-intensive designs where RF is unnecessary.
Availability
CY8C4125FNI-PS423T is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI interfaces, portable medical sensor nodes, and smart lighting dimmer modules requiring stable component supply and long-term manufacturability.
Supply support for CY8C4125FNI-PS423T 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and programmable mixed-signal solutions with global manufacturing and R&D infrastructure.
CY8C41x5 belongs to the PSoC™ 4100PS product line, designed specifically for cost-optimized, low-power embedded systems requiring integrated capacitive sensing, analog signal conditioning, and flexible digital peripherals without wireless overhead.
FAQ
Does CY8C4125FNI-PS423T support USB communication?
No. This device lacks a USB physical layer (PHY) and dedicated USB controller. Communication is limited to I²C, SPI, and UART via its three configurable Serial Communication Blocks (SCBs). For USB connectivity, external bridge ICs (e.g., CP2102N) or migration to PSoC™ 4000S/6 series with USBFS is required.
What is the maximum operating temperature for continuous Deep-Sleep mode?
The device is rated for industrial temperature range (–40 °C to +85 °C). Deep-Sleep current of 2.5 µA is specified at 25 °C; at +85 °C, typical Deep-Sleep current increases to ≤4.2 µA per datasheet Section 6.2.1, remaining within guaranteed operational limits.
Can the 12-bit SAR ADC and 10-bit single-slope ADC operate simultaneously?
Yes. The two ADCs are physically independent and share no clock or reference resources. They can sample different channels concurrently - for example, SAR ADC acquiring fast transient signals while single-slope ADC monitors slow-varying sensor baselines - with full software control over timing and trigger sources.
Is SmartSense™ auto-tuning compatible with custom PCB layouts and overlay materials?
Yes. SmartSense™ dynamically adjusts CAPSENSE™ parameters (IDAC, scan resolution, averaging) based on real-time noise and capacitance measurements. It supports user-defined thresholds and has been validated across diverse overlays (glass, plastic, wood) and PCB stack-ups, including flex-rigid designs with non-standard ground plane spacing.
CY8C4125FNI-PS423T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 45-XFBGA, WLCSP
- Series:
- PSOC™ 4 CY8C4100PS
- 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:
- 37
- 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, 16x12b SAR; D/A 2x7b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125FNI-PS423T FAQ
1.How can I place an order for CY8C4125FNI-PS423T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125FNI-PS423T 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 CY8C4125FNI-PS423T reliable?
The price and inventory of CY8C4125FNI-PS423T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125FNI-PS423T is usually 5 days.
3.What payment methods are accepted for CY8C4125FNI-PS423T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125FNI-PS423T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125FNI-PS423T?
CY8C4125FNI-PS423T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125FNI-PS423T 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 CY8C4125FNI-PS423T?
For technical support, including CY8C4125FNI-PS423T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125FNI-PS423T requirements.
6.How does Aetrix verify that CY8C4125FNI-PS423T is sourced from the original manufacturer or authorized distributors?
All CY8C4125FNI-PS423T 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 CY8C4125FNI-PS423T meets industry standards.
7.What is the process for return or replacement of CY8C4125FNI-PS423T?
All CY8C4125FNI-PS423T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125FNI-PS423T, 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 CY8C4125FNI-PS423T part is unused and in its original packaging.
Return procedure for CY8C4125FNI-PS423T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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