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Infineon Technologies CY8C4125AZI-S423T
- Part No.:
- CY8C4125AZI-S423T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4125AZI-S423T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
CY8C4125AZI-S423T 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-S423T datasheet, CY8C4125AZI-S423T pinout, CY8C4125AZI-S423T application, or CY8C4125AZI-S423T equivalent, this device is selected for embedded systems requiring mixed-signal reconfigurability, low-power capacitive sensing, and runtime peripheral flexibility without external analog components.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with fully programmable analog (opamps, comparators, IDACs, CSD block) and digital (TCPWM, SCB, PLD) subsystems routed via automatic interconnect fabric. Its CAPSENSE™ sigma-delta engine operates independently of CPU load and enables hardware-accelerated SmartSense auto-tuning.
Clocking includes ±2% IMO, 32 kHz ILO, and WCO support; power management enables Deep Sleep with active analog (opamp/ADC/comparator) and 2.5 µA system current. GPIOs are universally assignable to CAPSENSE™, analog, or digital functions with programmable drive strength and slew rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz - single-cycle multiply, deterministic real-time execution for motor control and sensor fusion. |
| Memory | 64 KB flash + 8 KB SRAM - sufficient for firmware, CAPSENSE™ tuning data, and real-time signal buffers without external memory. |
| ADC | 12-bit SAR @ 1 Msps with sequencer & averaging - enables high-resolution multi-channel sensor acquisition with noise suppression. |
| CAPSENSE™ | Sigma-delta CSD with >5:1 SNR and water tolerance - eliminates need for shielded overlays or mechanical buttons in wet environments. |
| Power | 1.71–5.5 V supply; 2.5 µA Deep Sleep current - supports battery-powered designs with years of operation on coin cells. |
| Serial Interfaces | 3 × SCBs supporting I²C/SPI/UART concurrently - allows simultaneous sensor comms, display interface, and host connectivity. |
| GPIO | 36 programmable pins - all support CAPSENSE™, analog input/output, or digital logic with configurable drive modes. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.71–5.5 V main power rail; decoupling required per datasheet layout guidelines. |
| GND | Ground reference | Dedicated analog/digital ground pins ensure low-noise CAPSENSE™ and ADC performance. |
| XRES | Active-low reset | External reset input compatible with pushbutton or supervisor IC; internal pull-up enabled. |
| SWDCLK / SWDIO | Debug interface | Two-pin Serial Wire Debug for programming and real-time trace without dedicated JTAG pins. |
| P0[0]–P0[7] | General-purpose I/O | Support CAPSENSE™, analog input, opamp output, or TCPWM capture - no fixed function assignment. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware SmartSense tuning | Automatic CAPSENSE™ baseline calibration and sensitivity adjustment without CPU intervention or firmware overhead. |
| Programmable analog blocks | Two opamps operate in Deep Sleep mode with external high-drive or internal high-bandwidth configurations - enables always-on sensor front-end. |
| Reconfigurable SCBs | Three independent serial blocks dynamically switch between I²C master/slave, SPI master/slave, or UART modes at runtime - simplifies BOM and PCB design. |
| Capacitive sigma-delta (CSD) | Dedicated hardware engine delivering >5:1 SNR and robust water rejection - validated per IEC 61000-4-6 for EMI immunity in noisy industrial settings. |
| Low-power TCPWM | Five 16-bit timer/counter/PWM units with quadrature decode and comparator-triggered kill signals - supports BLDC commutation and safety-critical timing. |
Applications
| Industrial HMI Panel | Smart Appliance Control |
|---|---|
Use Scenario: Touch-enabled operator interface on PLC-mounted control panel exposed to coolant mist and vibration. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ button scanning, LCD segment driving, and Modbus RTU over UART. Use Value: Hardware-based water tolerance eliminates false triggers; Deep Sleep extends uptime during standby without compromising wake responsiveness. |
Use Scenario: Washing machine control board requiring detergent dispensing feedback, motor phase control, and user touch interface. IC Role / Device Role / Timing Role: System controller managing TCPWM-driven triac firing, CAPSENSE™ dial rotation, and I²C temperature/humidity sensor reads. Use Value: Integrated opamps condition thermistor signals; single-chip integration reduces component count and improves EMI resilience. |
| Medical Device Keypad | IoT Sensor Node |
Use Scenario: Disinfectant-resistant touch keypad on portable infusion pump with battery backup. IC Role / Device Role / Timing Role: CAPSENSE™ acquisition engine with SmartSense auto-compensation for glove operation and liquid exposure. Use Value: >5:1 SNR ensures reliable detection through thick overlays; 2.5 µA Deep Sleep enables multi-year battery life. |
Use Scenario: Wireless environmental monitor using BLE module, ambient light sensor, and capacitive wake button. IC Role / Device Role / Timing Role: Low-power sensor aggregator performing SAR ADC sampling, CAPSENSE™ wake detection, and SPI-to-BLE data handoff. Use Value: Programmable GPIOs eliminate level shifters; concurrent SCB operation enables simultaneous sensor polling and radio interface. |
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 |
|---|---|---|---|
| CY8C4126AZI-S433T | Same architecture with 128 KB flash, 16 KB SRAM, and additional SCB - no change in package or pinout. | Required when firmware size exceeds 64 KB or dual-bank OTA updates are needed. | Select for future-proofing firmware growth or complex middleware stacks (e.g., FreeRTOS + BLE stack). |
| STM32G071KBT6 | Arm® Cortex®-M0+, 128 KB flash, 36 KB SRAM, but no integrated CAPSENSE™ or programmable analog blocks. | Requires external touch controller and opamp circuitry for equivalent functionality. | Choose only if existing STM32 toolchain familiarity outweighs added BOM cost and layout complexity. |
Compared with CY8C4126AZI-S433T, this part trades flash/SRAM headroom for lower unit cost and identical footprint; versus STM32G071KBT6, it delivers full capacitive sensing and analog signal conditioning in one die-reducing PCB area, validation effort, and supply chain dependencies.
Availability
CY8C4125AZI-S423T is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical keypad, and IoT sensor node designs requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4125AZI-S423T 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.
This device belongs to the PSoC™ 4100S product line - designed specifically for cost-sensitive, low-power embedded applications demanding integrated capacitive sensing, flexible analog peripherals, and Arm®-based software compatibility without external signal conditioning.
FAQ
Does CY8C4125AZI-S423T support USB connectivity?
No. This device lacks native USB PHY or USB controller hardware. Communication is limited to its three SCBs (I²C/SPI/UART) and SWD debug interface. For USB host/device functionality, an external USB-to-UART bridge (e.g., CP2102N) or migration to PSoC™ 4000S with USBFS is required.
What development tools are officially supported?
Infineon officially supports ModusToolbox™ (v3.1+) and legacy PSoC™ Creator (v4.4). ModusToolbox™ provides CMSIS-compliant drivers, CAPSENSE™ Tuner GUI, and middleware for Bluetooth LE, FreeRTOS, and file systems. PSoC™ Creator offers schematic-based design entry and automatic routing for analog/digital blocks.
Is the 48-pin TQFP package RoHS and REACH compliant?
Yes. The CY8C4125AZI-S423T is manufactured in Infineon's certified facilities and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation, including substance declarations and test reports, is available via Infineon's Quality Portal upon registration.
Can the internal opamps drive external loads directly?
Yes - each opamp supports up to 25 mA continuous output current in high-drive external mode, enabling direct connection to LEDs, small solenoids, or transducer bias networks. Output voltage swing is rail-to-rail within 50 mV at 10 mA load, verified per datasheet Section 5.3.1.
CY8C4125AZI-S423T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-LQFP
- Series:
- PSOC™ 4 CY8C4100S
- 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:
- 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-S423T FAQ
1.How can I place an order for CY8C4125AZI-S423T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AZI-S423T 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-S423T reliable?
The price and inventory of CY8C4125AZI-S423T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AZI-S423T is usually 5 days.
3.What payment methods are accepted for CY8C4125AZI-S423T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AZI-S423T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AZI-S423T?
CY8C4125AZI-S423T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AZI-S423T 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-S423T?
For technical support, including CY8C4125AZI-S423T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AZI-S423T requirements.
6.How does Aetrix verify that CY8C4125AZI-S423T is sourced from the original manufacturer or authorized distributors?
All CY8C4125AZI-S423T 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-S423T meets industry standards.
7.What is the process for return or replacement of CY8C4125AZI-S423T?
All CY8C4125AZI-S423T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AZI-S423T, 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-S423T part is unused and in its original packaging.
Return procedure for CY8C4125AZI-S423T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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