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Infineon Technologies CY8C4125AXI-473
- Part No.:
- CY8C4125AXI-473
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C4125AXI-473.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
CY8C4125AXI-473 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex™-M0 programmable system-on-chip (PSoC® 4100 family) integrating MCU, reconfigurable analog/digital blocks, 12-bit SAR ADC, two opamps, and two SCBs supporting I²C/SPI/UART. It operates from 1.71 V to 5.5 V, delivers 24 MHz CPU performance, and supports CapSense® capacitive sensing in industrial HMI applications.
For engineers reviewing the CY8C4125AXI-473 datasheet, CY8C4125AXI-473 pinout, CY8C4125AXI-473 application, or CY8C4125AXI-473 equivalent, key selection criteria include its 32 kB flash / 4 kB SRAM memory map, Deep Sleep current of 20 nA, 48-pin TQFP package with full GPIO reconfigurability, and integrated SmartSense™ auto-tuning for robust touch interfaces.
Technical Context
The device implements a single-layer AHB-Lite interconnect between Cortex-M0 CPU, SRAM, flash with Read Accelerator, and peripheral subsystems including TCPWM, SCB, CTBm, and SAR ADC. Clocking relies on IMO (24 MHz ±2%) and ILO (32.768 kHz), with glitch-free switching and hardware-controlled power mode transitions.
Analog resources include two rail-to-rail opamps configurable as buffers, comparators, or ADC input drivers; a 12-bit 806 ksps SAR ADC with differential input support and channel sequencer; and two low-power comparators active in Deep Sleep. Digital logic is implemented via programmable DSI and fixed-function peripherals with automatic routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0, 24 MHz max, single-cycle 32-bit multiply - enables deterministic real-time control and binary upward compatibility with Cortex-M3/M4. |
| Flash / SRAM | 32 kB flash with Read Accelerator / 4 kB SRAM - supports firmware + bootloader + configuration data without external memory in compact embedded designs. |
| ADC | 12-bit SAR, 806 ksps, differential/single-ended modes, channel sequencer with signal averaging - enables high-fidelity sensor acquisition with noise rejection in motor control or environmental monitoring. |
| Opamps | Two rail-to-rail opamps with Comparator mode and ADC input buffering - allows flexible analog front-end design including precision signal conditioning and zero-crossing detection. |
| Low-Power Modes | 20 nA Stop Mode, Deep Sleep with GPIO wakeup, Hibernate with SRAM retention - extends battery life in portable or energy-harvested IoT endpoints. |
| CapSense® | Cypress CapSense Sigma-Delta (CSD) with >5:1 SNR and SmartSense™ auto-tuning - delivers water-tolerant, production-ready touch buttons/sliders without manual calibration. |
| SCBs | Two serial communication blocks, runtime-reconfigurable as I²C/SPI/UART - simplifies interface adaptation across sensor fusion, display, or host communication requirements. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, rated for –40 °C to +105 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main supply input | 1.71–5.5 V system power; powers digital core, analog blocks, and I/O banks. |
| VSS | GND reference | Digital and analog ground common point; requires low-impedance PCB connection for noise immunity. |
| P0[0]–P0[7] | Programmable GPIO | Port 0 pins support CapSense®, LCD segment/common, analog input/output, or digital logic with configurable drive strength/slew rate. |
| P1[0]–P1[7] | Programmable GPIO | Port 1 pins include dedicated SWD debug signals (SWDIO, SWCLK) and support high-speed digital interfaces. |
| P2[0]–P2[7] | Programmable GPIO | Port 2 pins support analog functions (opamp inputs/outputs, ADC channels) and deep-sleep wakeup capability. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up ensures reliable startup without external components. |
| XTAL_IN / XTAL_OUT | Crystal oscillator terminals | Supports optional external crystal (1–33 MHz) for precise timing; not required due to integrated IMO/ILO oscillators. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Subsystem | Two opamps + 12-bit SAR ADC + dual LP comparators enable mixed-signal signal chains without external components in space-constrained designs. |
| SmartSense™ Auto-Tuning | Hardware-accelerated CapSense® tuning eliminates manual calibration and compensates for environmental drift in production touch interfaces. |
| Runtime-Reconfigurable SCBs | Two serial blocks independently switch between I²C, SPI, and UART protocols in firmware - reduces BOM count and simplifies multi-interface system integration. |
| Deep Sleep with GPIO Wakeup | 20 nA Stop Mode + pin-selectable wake sources allow ultra-low-power sensor polling while retaining fast response to user interaction. |
| Flash Security Options | Open/Protected/Kill protection modes with row-level read/write locks provide scalable security for IP protection and anti-tampering in connected devices. |
Applications
| Industrial HMI Panels | Smart Home Sensors |
|---|---|
Use Scenario: Touch-enabled control panels for HVAC, lighting, or access systems operating in extended temperature environments. IC Role / Device Role / Timing Role: Primary system controller executing CapSense® firmware, managing local displays via LCD drive, and communicating with gateway via I²C. Use Value: Integrated CSD engine and –40 °C to +105 °C rating eliminate external touch controllers and thermal derating concerns. | Use Scenario: Battery-powered occupancy/motion sensors with ambient light and temperature monitoring. IC Role / Device Role / Timing Role: Sensor hub aggregating analog (temp/light) and digital (PIR) inputs, performing local decision logic, and transmitting alerts via UART to BLE module. Use Value: 20 nA Stop Mode and programmable SAR ADC sequencing extend coin-cell battery life beyond 2 years. |
| Motor Control Interfaces | Medical Diagnostic Devices |
Use Scenario: Compact BLDC motor driver boards requiring analog current sensing, PWM generation, and fault signaling. IC Role / Device Role / Timing Role: Real-time controller generating center-aligned PWM via TCPWM blocks, sampling shunt voltage with SAR ADC, and triggering kill signals via comparator outputs. Use Value: Comparator-based hardware kill path ensures <1 µs fault response time independent of firmware latency. | Use Scenario: Portable blood glucose meters or pulse oximeters requiring precision analog front-end and secure firmware storage. IC Role / Device Role / Timing Role: Mixed-signal SoC acquiring analog biosensor signals, running FDA-compliant algorithms, and storing calibrated parameters in protected flash. Use Value: Flash Kill mode prevents unauthorized firmware extraction or tampering during device servicing or disposal. |
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 |
|---|---|---|---|
| CY8C4025LQI-431 | Lower memory (16 kB flash / 2 kB SRAM), no CapSense® CSD block, 32-pin QFN package | Suitable for cost-sensitive, non-touch applications with simpler analog needs | Select when CapSense® and >32 kB code space are unnecessary and footprint is constrained. |
| STM32F072RBT6 | ARM Cortex-M0+, 48 MHz, 128 kB flash, but discrete analog peripherals require external opamps/ADCs | Better for high-throughput digital processing where analog integration is secondary | Choose when higher clock speed and larger memory outweigh benefits of integrated analog reconfigurability. |
Compared with CY8C4125AXI-473, CY8C4025LQI-431 trades CapSense® and memory for lower cost and smaller size, while STM32F072RBT6 offers greater raw compute headroom at the expense of analog integration and design consolidation.
Availability
CY8C4125AXI-473 is available at Aetrix Electronics and suitable for industrial HMI panels, smart home sensors, motor control interfaces, and medical diagnostic devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CY8C4125AXI-473 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 global semiconductor leader headquartered in Munich, Germany, delivering power systems, automotive ICs, and embedded security solutions to industrial and consumer markets.
This part belongs to the PSoC® 4100 family - a programmable mixed-signal SoC platform designed for embedded applications demanding tight integration of ARM-based control, configurable analog, and capacitive sensing without external components.
FAQ
Does CY8C4125AXI-473 support external crystal oscillators?
Yes. The device provides dedicated XTAL_IN and XTAL_OUT pins supporting external crystals from 1 MHz to 33 MHz. However, it also integrates an internal main oscillator (IMO) at 24 MHz ±2% and internal low-power oscillator (ILO) at 32.768 kHz, making external crystals optional for most applications requiring moderate timing accuracy.
What debug interface does CY8C4125AXI-473 use?
CY8C4125AXI-473 uses the Arm Serial Wire Debug (SWD) interface with two-wire connectivity (SWDIO and SWCLK). It supports full on-chip debugging, flash programming, and trace capabilities via standard tools like MiniProg3 or third-party JTAG/SWD adapters compatible with Arm Cortex-M0.
Can all GPIO pins be used for CapSense® sensing?
Yes. All 36 GPIO pins support CapSense® functionality, including mutual-capacitance and self-capacitance configurations. The device's CapSense Sigma-Delta (CSD) block and SmartSense™ auto-tuning algorithm operate across any pin combination, enabling flexible layout and robust water-tolerant touch designs without dedicated sensor pins.
Is flash protection reversible after enabling Kill mode?
No. Once Kill mode is activated, flash memory becomes permanently inaccessible for external read, write, or erase operations - including debug interface access. This irreversible state prevents firmware extraction or partial erasure attacks but also precludes failure analysis or recovery. Use only after final production firmware validation.
CY8C4125AXI-473 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- Series:
- PSOC™ 4 CY8C4100
- 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, 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 8x12b SAR; D/A 2xIDAC
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125AXI-473 FAQ
1.How can I place an order for CY8C4125AXI-473 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AXI-473 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-473 reliable?
The price and inventory of CY8C4125AXI-473 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AXI-473 is usually 5 days.
3.What payment methods are accepted for CY8C4125AXI-473?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AXI-473 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AXI-473?
CY8C4125AXI-473 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AXI-473 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-473?
For technical support, including CY8C4125AXI-473 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AXI-473 requirements.
6.How does Aetrix verify that CY8C4125AXI-473 is sourced from the original manufacturer or authorized distributors?
All CY8C4125AXI-473 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-473 meets industry standards.
7.What is the process for return or replacement of CY8C4125AXI-473?
All CY8C4125AXI-473 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AXI-473, 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-473 part is unused and in its original packaging.
Return procedure for CY8C4125AXI-473:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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