My Inquiry
My Account
Infineon Technologies CY8C4125AXI-S433
- Part No.:
- CY8C4125AXI-S433
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4125AXI-S433.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:765
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C4125AXI-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 1.71–5.5 V operation, deep-sleep mode at 2.5 µA, and delivers >5:1 SNR for water-tolerant touch interfaces in consumer HMI and industrial control panels.
For engineers reviewing the CY8C4125AXI-S433 datasheet, CY8C4125AXI-S433 pinout, CY8C4125AXI-S433 application, or CY8C4125AXI-S433 equivalent, this device enables rapid development of mixed-signal embedded systems with hardware-accelerated touch, configurable TCPWM, SCB-based I²C/SPI/UART, and programmable opamps operating in Deep Sleep.
Technical Context
The CY8C4125AXI-S433 integrates a single-core Arm Cortex-M0+ CPU with tightly coupled flash and SRAM, supported by a flexible clock system including ±2% IMO, 32 kHz ILO, and WCO. Its analog subsystem includes two continuous-time opamps (CTB), dual low-power comparators, and a 12-bit 1-Msps SAR ADC with channel sequencer and signal averaging.
Digital flexibility is delivered via five TCPWM blocks (supporting center-aligned PWM, quadrature decode, and comparator-triggered kill signals), three reconfigurable SCBs, and programmable logic blocks that perform Boolean operations on GPIOs-enabling real-time signal conditioning without CPU intervention.
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 - sufficient for complex CAPSENSE™ + communication + control firmware with zero external memory dependency. |
| Analog Performance | 12-bit 1-Msps SAR ADC with differential input, sequencer, and signal averaging - supports high-accuracy sensor acquisition and noise-rejecting measurements. |
| Capacitive Sensing | CAPSENSE™ sigma-delta engine with >5:1 SNR and SmartSense auto-tuning - eliminates manual calibration and ensures robust operation under moisture or EMI. |
| Low-Power Operation | Deep Sleep current = 2.5 µA with opamps/comparators active - enables battery-powered touch interfaces with multi-year runtime. |
| I/O Flexibility | 36 programmable GPIOs with configurable drive strength, slew rate, and CAPSENSE™/analog/digital roles - simplifies PCB layout and enables pin reuse across design iterations. |
| Communication | Three SCBs supporting concurrent I²C, SPI, or UART - allows independent peripheral interfacing (e.g., I²C sensor, SPI display, UART debug) without resource contention. |
Pinout & Package
This device is packaged in a 48-lead TQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. All pins support multiple functions via routing matrix; dedicated power, ground, reset, SWD, and crystal connections are fixed per datasheet pin map.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.71–5.5 V operation; decoupling required per datasheet layout guidelines to maintain analog integrity. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external 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 GPIOs | Each pin supports CAPSENSE™, analog input/output, digital logic, or LCD segment drive - configured at runtime or boot. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug port enabling full JTAG-like programming, breakpointing, and memory inspection without dedicated debug header. |
| XTAL_IN / XTAL_OUT | 32 kHz watch crystal oscillator terminals | Connects to external 32.768 kHz crystal for precise RTC timing and low-power wake-up events. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | Two opamps operate in Deep Sleep with selectable drive modes (high-bandwidth internal or high-drive external) - enables always-on sensor front-end with sub-µA quiescent current. |
| Hardware-Accelerated CAPSENSE™ | Sigma-delta CSD engine with automatic SmartSense tuning - reduces firmware overhead and eliminates sensitivity drift due to temperature/humidity. |
| Programmable Digital Logic | Boolean logic blocks route and combine GPIO signals in hardware - offloads CPU for debounce, edge detection, or state-machine transitions. |
| Flexible Timing Resources | Five TCPWM blocks support center-aligned PWM, quadrature decoding, and comparator-triggered fault shutdown - ideal for motor control and encoder feedback. |
| Multi-Protocol Serial Interface | Three SCBs independently configurable as I²C master/slave, SPI master/slave, or UART - eliminates need for external protocol translators. |
Applications
| Smart Home Touch Panel | Industrial HMI Keypad |
|---|---|
Use Scenario: Wall-mounted thermostat with glass-front capacitive buttons and ambient light sensing. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ button scan, temperature ADC reading, I²C communication with HVAC controller, and real-time clock via WCO. Use Value: Single-chip integration eliminates external touch controller and reduces BOM cost while maintaining >5:1 SNR under condensation. |
Use Scenario: Factory-floor operator interface with metal-over-glass keypad and status LED indicators. IC Role / Device Role / Timing Role: System controller executing CAPSENSE™ with water tolerance, driving LEDs via GPIO PWM, and communicating via RS-485 (via SCB + transceiver). Use Value: Deep Sleep operation at 2.5 µA extends battery backup life during power outages; programmable drive strength ensures reliable LED brightness control. |
| Portable Medical Device UI | White Goods Control Board |
Use Scenario: Handheld glucose meter with touch-responsive menu navigation and low-power display backlight control. IC Role / Device Role / Timing Role: Main processor managing capacitive UI, 12-bit SAR ADC for sensor signal acquisition, and SPI-driven OLED display interface. Use Value: Integrated opamp buffering and signal averaging enable clean analog readings from electrochemical sensors without external signal conditioning. |
Use Scenario: Washing machine main control board requiring motor phase control, water-level sensing, and user interface. IC Role / Device Role / Timing Role: Real-time controller running TCPWM for BLDC motor commutation, CAPSENSE™ for detergent drawer detection, and SCB-based UART for service diagnostics. Use Value: Comparator-triggered kill signals provide hardware-fast motor shutdown on overcurrent, improving safety compliance without software latency. |
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-S402 | Lower memory (32 KB flash / 4 KB SRAM); no WCO; 32-QFN package | Suitable for space-constrained, cost-sensitive touch-only designs without RTC or high-speed analog needs | Select when footprint and BOM cost outweigh need for 64 KB flash or crystal-based timing accuracy. |
| STM32G031F8P6 | ARM Cortex-M0+, 64 MHz, 64 KB flash, but lacks integrated CAPSENSE™ and programmable analog blocks | Requires external touch controller and opamp circuitry for equivalent capacitive sensing performance | Choose only if leveraging existing STM32 ecosystem tools and accepting added component count for touch functionality. |
Compared with CY8C4125AXI-S433, CY8C4025LQI-S402 trades memory and timing precision for smaller size and lower cost, while STM32G031F8P6 offers higher CPU speed but demands external components to match integrated analog/touch capabilities.
Availability
CY8C4125AXI-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 CY8C4125AXI-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, automotive MCUs, and secure connectivity solutions, with global R&D and manufacturing infrastructure.
CY8C4125AXI-S433 belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, low-power embedded systems requiring integrated capacitive sensing, reconfigurable analog, and Arm-based programmability in a single chip.
FAQ
Does CY8C4125AXI-S433 support USB connectivity?
No, CY8C4125AXI-S433 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, an external USB-to-UART bridge (e.g., CP2102) or migration to PSoC™ 4 BLE/4000S families is required.
What development tools are officially supported for this device?
Infineon officially supports ModusToolbox™ (v3.x+) and legacy PSoC™ Creator (v4.4) for CY8C4125AXI-S433. Both provide CAPSENSE™ Tuner, PDL drivers, BSPs, and code generation for TCPWM, SCB, and analog blocks. ARM GCC and OpenOCD are validated for command-line builds and debugging.
Can all 36 GPIOs be used simultaneously for CAPSENSE™?
No. While any GPIO can be assigned to CAPSENSE™, the maximum number of simultaneous sensing channels is limited by the CSD hardware block - up to 32 electrodes with shared mutual-capacitance scanning or 24 with dedicated shield drivers, depending on configuration and resolution settings per Infineon AN92239.
Is the 48 MHz CPU frequency achievable across the full 1.71–5.5 V supply range?
Yes, the Arm Cortex-M0+ core operates at up to 48 MHz across the entire 1.71–5.5 V supply range. The internal IMO is trimmed to ±2% accuracy and dynamically adjusts for voltage/temperature variation, ensuring timing-critical peripherals (TCPWM, SCB) remain synchronized without external crystal dependency.
CY8C4125AXI-S433 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- 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:
- 36
- 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:
CY8C4125AXI-S433 FAQ
1.How can I place an order for CY8C4125AXI-S433 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AXI-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 CY8C4125AXI-S433 reliable?
The price and inventory of CY8C4125AXI-S433 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AXI-S433 is usually 5 days.
3.What payment methods are accepted for CY8C4125AXI-S433?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AXI-S433 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AXI-S433?
CY8C4125AXI-S433 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AXI-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 CY8C4125AXI-S433?
For technical support, including CY8C4125AXI-S433 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AXI-S433 requirements.
6.How does Aetrix verify that CY8C4125AXI-S433 is sourced from the original manufacturer or authorized distributors?
All CY8C4125AXI-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 CY8C4125AXI-S433 meets industry standards.
7.What is the process for return or replacement of CY8C4125AXI-S433?
All CY8C4125AXI-S433 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AXI-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 CY8C4125AXI-S433 part is unused and in its original packaging.
Return procedure for CY8C4125AXI-S433:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C4125AXI-S433 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
