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Infineon Technologies CY8C4125AZI-S423
- Part No.:
- CY8C4125AZI-S423
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4125AZI-S423.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,461
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Product details
Overview
CY8C4125AZI-S423 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, 12-bit 1-Msps SAR ADC, and three reconfigurable serial communication blocks (I²C/SPI/UART). It supports deep-sleep operation at 2.5 µA and delivers best-in-class SNR (>5:1) for water-tolerant touch interfaces in industrial HMI and consumer control panels.
For engineers reviewing the CY8C4125AZI-S423 datasheet, CY8C4125AZI-S423 pinout, CY8C4125AZI-S423 application, or CY8C4125AZI-S423 equivalent, key selection considerations include its dual-mode opamp support in Deep Sleep, SmartSense automatic tuning for CAPSENSE™, TCPWM kill-signal triggering for motor safety, and GPIO-configurable LCD segment drive capability.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with fully programmable analog (CTB opamps, SAR ADC, CSD sigma-delta engine) and digital (TCPWM, SCB, PLD) subsystems. Its clock system combines ±2% IMO, 32 kHz ILO, and WCO for precision timing across sleep/wake transitions.
Analog signal chain flexibility includes opamp-based ADC input buffering, comparator-triggered PWM shutdown, and IDAC-driven capacitive sensing on any GPIO. Digital routing uses automatic interconnect fabric to bind peripherals without fixed signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz - enables real-time deterministic control with single-cycle multiply for motor or sensor algorithms. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for firmware with CAPSENSE™ middleware, TCPWM motor profiles, and ModusToolbox™ PDL drivers. |
| ADC | 12-bit SAR, 1 Msps, differential/single-ended - supports high-resolution current/voltage monitoring in power management or battery systems. |
| CAPSENSE™ | Sigma-delta CSD with >5:1 SNR and SmartSense auto-tuning - eliminates manual calibration for production touch buttons/sliders exposed to moisture. |
| Power Modes | Deep Sleep at 2.5 µA with active analog - allows always-on capacitive wake detection while preserving battery life in portable devices. |
| Serial Interfaces | 3 × SCBs supporting I²C/SPI/UART concurrently - enables simultaneous sensor bus (I²C), display interface (SPI), and debug/communication (UART). |
| TCPWM Blocks | 5 × 16-bit Timer/Counter/PWM - provides center-aligned PWM for BLDC commutation and quadrature decoding for rotary encoders. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | GPIO / CAPSENSE™ / Analog Input / SCB SDA/SCL | Configurable as touch sense electrode, ADC input, or I²C interface - enables shared pin usage for cost-sensitive HMI designs. |
| P1[0]–P1[7] | GPIO / TCPWM / SCB MOSI/MISO/SCLK | Supports hardware PWM output and SPI master/slave - allows direct motor gate drive or display data transfer without external logic. |
| P2[0]–P2[7] | GPIO / LCD Segment / IDAC Output / Comparator Input | Drives up to 32-segment LCD directly; also sources/sinks IDAC current for self-capacitance sensing on same pins. |
| XRES | Active-low Reset Input | Asynchronous reset pin with internal pull-up - ensures reliable initialization during brown-out or ESD events. |
| SWDIO / SWCLK | ARM Serial Wire Debug Interface | Two-pin debug interface compatible with standard CMSIS-DAP tools - enables in-circuit programming and real-time trace without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration that adapts to environmental drift and PCB aging - reduces production test time and field failure rates. |
| Deep-Sleep Analog Operation | Opamps and comparators remain functional at 2.5 µA system current - enables capacitive wake-on-touch or analog threshold detection without full MCU wake-up. |
| Reconfigurable SCBs | Three independent serial blocks each dynamically assignable as I²C master/slave, SPI master/slave, or UART - simplifies BOM consolidation across product variants. |
| Programmable Drive Strength | GPIO output drive configurable from 2 mA to 25 mA per pin - supports direct LED driving, relay coil control, or noise-immune signal routing without external buffers. |
| Capacitive Sigma-Delta Engine | Dedicated hardware block for CSD measurements with >5:1 SNR - achieves robust touch performance under water, gloves, or EMI without firmware filtering overhead. |
Applications
| Industrial Control Panel | Smart Home Appliance UI |
|---|---|
|
Use Scenario: Touch-enabled operator interface on HVAC controllers or PLC HMIs with waterproof overlay. IC Role / Device Role / Timing Role: Primary MCU executing CAPSENSE™ scanning, TCPWM fan speed control, and UART communication to main controller. Use Value: SmartSense auto-tuning maintains button responsiveness across temperature/humidity shifts; Deep Sleep enables low-power wake-on-touch. |
Use Scenario: Cooktop or oven control panel with slider, buttons, and segmented LCD display. IC Role / Device Role / Timing Role: Single-chip solution handling capacitive touch, LCD segment drive, and thermal sensor ADC acquisition. Use Value: Integrated LCD drive eliminates external driver IC; 12-bit SAR ADC enables precise thermistor-based temperature feedback. |
| Medical Patient Monitor Front Panel | Motorized Office Equipment |
|
Use Scenario: Sterile, glove-compatible touch interface on infusion pump or vital signs monitor. IC Role / Device Role / Timing Role: CAPSENSE™ front-end with comparator-triggered TCPWM kill signal for emergency stop logic. Use Value: Hardware-based kill signal path meets IEC 62304 Class B safety requirements; >5:1 SNR ensures reliability with latex gloves. |
Use Scenario: Adjustable desk or printer control with position sensing and brushless motor drive. IC Role / Device Role / Timing Role: Quadrature decoder input + center-aligned PWM output for closed-loop motor control. Use Value: On-chip quadrature decoding reduces external component count; TCPWM kill signal prevents runaway motion during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4014LQI-S412 | Lower memory (16 KB flash, 2 KB SRAM), no CSD block, 32-pin QFN package | Limited to basic GPIO + SCB tasks; lacks CAPSENSE™ and advanced analog features | Select when cost and footprint are critical and touch functionality is unnecessary. |
| CY8C4247AZI-M485 | Higher performance (64 KB flash, 16 KB SRAM), dual-core CAPSENSE™, 48-pin TQFP with enhanced ESD rating | Supports multi-finger gesture recognition and higher channel count touch systems | Select for next-gen touch interfaces requiring greater processing headroom and noise immunity. |
Compared with CY8C4125AZI-S423, CY8C4014LQI-S412 sacrifices analog programmability and touch capability for lower cost, while CY8C4247AZI-M485 extends CAPSENSE™ scalability and memory for complex HMI-making CY8C4125AZI-S423 the optimal balance of integration, power efficiency, and production-ready touch tuning.
Availability
CY8C4125AZI-S423 is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical front panels, and motorized office equipment requiring stable component supply and long-term lifecycle support.
Supply support for CY8C4125AZI-S423 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.
CY8C4125AZI-S423 belongs to the PSoC™ 4100S family - designed specifically for cost-sensitive, low-power embedded systems requiring integrated capacitive touch, analog sensing, and flexible digital peripherals in a single chip.
FAQ
Does CY8C4125AZI-S423 support USB connectivity?
No. The device does not include a USB PHY or USB controller. Communication is limited to the three reconfigurable SCBs (I²C, SPI, UART) and SWD debug interface. For USB host/device functionality, an external USB-to-UART bridge or companion IC is required.
What development tools are officially supported for this part?
Infineon officially supports ModusToolbox™ (v3.x+) and legacy PSoC™ Creator v4.4 for CY8C4125AZI-S423. Both provide CAPSENSE™ Tuner, TCPWM configuration GUI, and PDL-based firmware examples. ARM GCC and Keil MDK toolchains are validated via ModusToolbox™.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No. The 12-bit SAR ADC uses a single sample-and-hold circuit and supports sequential conversion via hardware channel sequencer with signal averaging, but lacks true simultaneous sampling across channels. Differential mode is supported per channel, not across channels.
Is the WCO (Watch Crystal Oscillator) mandatory for real-time clock operation?
Yes. The 32.768 kHz WCO is required for accurate RTC operation and low-power Deep Sleep wake-up timing. The internal ILO (32 kHz) has ±50% accuracy and is unsuitable for timekeeping; it serves only for basic watchdog or wake-up intervals where precision is not critical.
CY8C4125AZI-S423 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-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:
CY8C4125AZI-S423 FAQ
1.How can I place an order for CY8C4125AZI-S423 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AZI-S423 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 CY8C4125AZI-S423 reliable?
The price and inventory of CY8C4125AZI-S423 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AZI-S423 is usually 5 days.
3.What payment methods are accepted for CY8C4125AZI-S423?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AZI-S423 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AZI-S423?
CY8C4125AZI-S423 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AZI-S423 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 CY8C4125AZI-S423?
For technical support, including CY8C4125AZI-S423 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AZI-S423 requirements.
6.How does Aetrix verify that CY8C4125AZI-S423 is sourced from the original manufacturer or authorized distributors?
All CY8C4125AZI-S423 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 CY8C4125AZI-S423 meets industry standards.
7.What is the process for return or replacement of CY8C4125AZI-S423?
All CY8C4125AZI-S423 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AZI-S423, 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 CY8C4125AZI-S423 part is unused and in its original packaging.
Return procedure for CY8C4125AZI-S423:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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