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Infineon Technologies CY8C4125AZI-S433T
- Part No.:
- CY8C4125AZI-S433T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
CY8C4125AZI-S433T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
CY8C4125AZI-S433T 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-S433T datasheet, CY8C4125AZI-S433T pinout, CY8C4125AZI-S433T application, or CY8C4125AZI-S433T equivalent, key selection criteria include deep-sleep current, CAPSENSE™ sigma-delta performance, TCPWM kill-signal triggering for motor safety, programmable analog opamp modes, and ModusToolbox™ software integration for rapid touch + control firmware development.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0+ core with fully reconfigurable analog (opamps, comparators, IDACs, SAR ADC) and digital (TCPWM, SCB, PLD) subsystems routed via automatic interconnect fabric. All analog peripherals-including two opamps and low-power comparators-remain operational in Deep Sleep mode.
Its CAPSENSE™ block uses capacitive sigma-delta modulation with hardware-accelerated SmartSense™ auto-tuning, enabling robust touch detection under moisture without host CPU intervention. Clocking includes ±2% IMO, 32 kHz ILO, and WCO support for RTC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+ @ 48 MHz with single-cycle multiply - enables real-time control loops and deterministic interrupt latency. |
| Memory | 64 KB flash (with read accelerator) + 8 KB SRAM - supports complex firmware with bootloader, touch stack, and communication protocols. |
| ADC | 12-bit SAR ADC, 1 Msps, differential/single-ended, channel sequencer with signal averaging - suitable for precision sensor acquisition and multi-channel monitoring. |
| CAPSENSE™ | Sigma-delta modulator with >5:1 SNR and water tolerance - eliminates false triggers in humid environments without shielding or firmware compensation. |
| Low-Power Mode | Deep Sleep current = 2.5 µA with analog active - enables battery-powered touch interfaces with multi-year operation on coin cells. |
| Serial Interfaces | 3 × SCBs supporting I²C, SPI, or UART concurrently - allows simultaneous USB bridge, sensor bus, and debug interface without external logic. |
| TCPWM Blocks | 5 × 16-bit Timer/Counter/PWM with center-aligned, edge-aligned, and pseudo-random modes - supports motor control, LED dimming, and encoder decoding. |
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] | General-purpose GPIO / CAPSENSE™ CSD channel / Analog input | Programmable drive strength and slew rate; supports analog buffering for ADC inputs and high-SNR capacitive sensing. |
| P1[0]–P1[7] | GPIO / SCB0/1/2 signal lines / TCPWM outputs | Configurable as I²C SDA/SCL, SPI MOSI/MISO/SCLK/SS, or UART TX/RX; supports hardware kill-signal routing to TCPWM blocks. |
| XRES | Active-low reset input | Asynchronous external reset with internal pull-up; compatible with pushbutton or supervisor IC assertion. |
| VDD / VSS | Power supply / Ground | Supports 1.71–5.5 V operation; dual VDD/VSS pairs ensure noise isolation between analog and digital domains. |
| SWDIO / SWDCK | ARM Serial Wire Debug interface | Two-pin debug interface for programming and real-time trace; operates during all power modes except Hibernate. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog | Two opamps configurable as buffer, comparator, or transimpedance amplifier - enables sensor signal conditioning without external components. |
| SmartSense™ Auto-Tuning | Hardware-accelerated CAPSENSE™ calibration - reduces firmware development time by eliminating manual threshold tuning across temperature/humidity. |
| Reconfigurable SCBs | Three independent serial blocks each supporting I²C, SPI, or UART in runtime - simplifies BOM by replacing discrete protocol translators. |
| Deep Sleep Analog Active | Opamps, comparators, and CSD remain functional at 2.5 µA system current - enables always-on touch wake-up without compromising battery life. |
| LCD Segment Drive | Direct GPIO-based segment drive capability - supports up to 36-segment static LCD without external driver IC. |
Applications
| Industrial HMI Panel | Smart Appliance Control |
|---|---|
Use Scenario: Touch-enabled operator interface on PLC-mounted control panel with ambient humidity up to 95% RH. IC Role / Device Role / Timing Role: Primary MCU handling CAPSENSE™ touch scanning, local button debouncing, and RS-485 communication to main controller. Use Value: Hardware-based SmartSense™ ensures reliable touch detection without firmware recalibration when condensation forms on overlay. |
Use Scenario: Washing machine control board requiring water-resistant touch buttons, motor PWM control, and temperature monitoring. IC Role / Device Role / Timing Role: System-on-chip managing CAPSENSE™ UI, 5× TCPWM for brushless motor commutation, and 12-bit ADC for NTC thermistor reading. Use Value: Integrated opamps condition thermistor signals directly; deep-sleep current <3 µA extends standby battery life for door-open alerts. |
| Medical Device Keypad | IoT Sensor Hub |
Use Scenario: Disinfectant-resistant touch keypad on portable diagnostic equipment requiring IP65-rated front panel. IC Role / Device Role / Timing Role: Dedicated touch controller with CAPSENSE™ sigma-delta engine and isolated I²C interface to host ARM processor. Use Value: >5:1 SNR rejects noise from nearby switching power supplies and ESD events during clinical use. |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and air quality data with BLE gateway interface. IC Role / Device Role / Timing Role: Low-power sensor aggregator running CAPSENSE™ for user interaction, SAR ADC for analog sensors, and UART to BLE module. Use Value: 2.5 µA Deep Sleep with active analog enables 10+ year coin-cell operation while maintaining instant wake-on-touch responsiveness. |
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 |
|---|---|---|---|
| CY8C4126AZI-S433T | Same package and pinout; adds 16 KB additional flash (80 KB total) and 2 KB extra SRAM (10 KB). | Better suited for field-upgradable firmware with dual-bank OTA or larger middleware stacks (e.g., FreeRTOS + BLE stack). | Select when firmware size exceeds 64 KB or when future feature expansion requires headroom. |
| CY8C4025AZI-S412 | Lower-cost variant: 32 KB flash, 4 KB SRAM, no SmartSense™ auto-tuning, reduced TCPWM count (3 blocks). | Targeted at cost-sensitive, non-critical touch applications where manual tuning and smaller code footprint are acceptable. | Choose for high-volume consumer products where BOM cost reduction outweighs advanced CAPSENSE™ features. |
Compared with CY8C4125AZI-S433T, the CY8C4126AZI-S433T offers scalable memory for evolving firmware, while the CY8C4025AZI-S412 trades CAPSENSE™ intelligence and peripheral count for lower unit cost - making the CY8C4125AZI-S433T the optimal balance of touch performance, low-power capability, and design flexibility for mid-tier industrial and medical UIs.
Availability
CY8C4125AZI-S433T is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, medical device keypads, and IoT sensor hubs requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for CY8C4125AZI-S433T 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 leader specializing in power management, sensing, connectivity, and microcontroller solutions for industrial, automotive, and IoT markets.
This device belongs to the PSoC™ 4100S family - designed specifically to integrate robust capacitive sensing, programmable analog/digital logic, and Arm®-based processing into a single chip for human-interface and sensor-edge applications.
FAQ
Does CY8C4125AZI-S433T support USB communication?
No, CY8C4125AZI-S433T does not include a USB PHY or dedicated USB controller. It supports UART, I²C, and SPI interfaces only. For USB connectivity, an external USB-to-UART bridge (e.g., CP2102N) or host-side USB enumeration is required. The device's SCB blocks can be configured as full-duplex UART at up to 2 Mbps for bridging to USB-UART ICs.
Can the SAR ADC perform simultaneous sampling on multiple channels?
No, the 12-bit SAR ADC has a single conversion core and uses a hardware channel sequencer to scan up to 16 inputs sequentially. It supports signal averaging per channel but does not provide true simultaneous sampling. For synchronized multi-channel acquisition, external analog multiplexing or a dedicated multi-core ADC is required.
Is the CAPSENSE™ block certified for IEC 61000-4-6 conducted immunity?
Yes, Infineon provides CAPSENSE™ EMC validation reports confirming compliance with IEC 61000-4-6 Level 3 (10 V/m, 150 kHz–80 MHz) when implemented per layout guidelines in AN95988. The sigma-delta architecture and hardware filtering contribute to this certification - no additional external components are needed for basic compliance.
What debug interfaces are supported, and is JTAG available?
CY8C4125AZI-S433T supports ARM Serial Wire Debug (SWD) only - using SWDIO and SWDCK pins. JTAG is not implemented. SWD provides full flash programming, real-time variable inspection, and breakpoint debugging via standard tools including ModusToolbox™, PSoC™ Creator, and third-party IDEs like Keil µVision or SEGGER Embedded Studio.
CY8C4125AZI-S433T 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-S433T FAQ
1.How can I place an order for CY8C4125AZI-S433T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125AZI-S433T 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-S433T reliable?
The price and inventory of CY8C4125AZI-S433T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125AZI-S433T is usually 5 days.
3.What payment methods are accepted for CY8C4125AZI-S433T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125AZI-S433T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125AZI-S433T?
CY8C4125AZI-S433T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125AZI-S433T 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-S433T?
For technical support, including CY8C4125AZI-S433T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125AZI-S433T requirements.
6.How does Aetrix verify that CY8C4125AZI-S433T is sourced from the original manufacturer or authorized distributors?
All CY8C4125AZI-S433T 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-S433T meets industry standards.
7.What is the process for return or replacement of CY8C4125AZI-S433T?
All CY8C4125AZI-S433T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125AZI-S433T, 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-S433T part is unused and in its original packaging.
Return procedure for CY8C4125AZI-S433T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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