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Infineon Technologies CY8C4125PVI-PS421
- Part No.:
- CY8C4125PVI-PS421
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
CY8C4125PVI-PS421.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,323
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Product details
Overview
CY8C4125PVI-PS421 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex®-M0 programmable system-on-chip (PSoC® 4100 family) with 32 kB flash, 4 kB SRAM, 12-bit 806 ksps SAR ADC, two opamps, and two SCBs supporting I²C/SPI/UART. It operates from 1.71 V to 5.5 V and supports CapSense® for touch interfaces in industrial HMI applications.
For engineers reviewing the CY8C4125PVI-PS421 datasheet, CY8C4125PVI-PS421 pinout, CY8C4125PVI-PS421 application, or CY8C4125PVI-PS421 equivalent, key selection criteria include its integrated analog subsystem (opamp + comparator + IDAC), Deep Sleep current (20 nA), TCPWM flexibility for motor control timing, and PSoC Creator–enabled hardware/firmware co-design flow.
Technical Context
The device integrates a 24-MHz Arm Cortex-M0 CPU with single-cycle multiply, tightly coupled flash accelerator enabling zero-wait-state execution, and a hierarchical AHB-Lite interconnect linking SRAM, peripherals, and GPIOs. Its programmable analog subsystem includes two opamps configurable as buffers, comparators, or ADC input drivers, plus two low-power comparators active in Deep Sleep mode.
Digital reconfigurability is implemented via four 16-bit TCPWM blocks supporting center-aligned PWM, pseudo-random modulation, and comparator-triggered kill signals - critical for motor drive safety logic. Two serial communication blocks (SCBs) are runtime-reconfigurable between I²C, SPI, and UART protocols without firmware reload.
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 Thumb-2 binary compatibility with higher Cortex-M families. |
| Memory | 32 kB flash (with Read Accelerator), 4 kB SRAM - sufficient for embedded firmware with analog/digital peripheral drivers and CapSense® library integration. |
| ADC | 12-bit SAR, 806 ksps, differential/single-ended, channel sequencer with signal averaging - supports high-resolution sensor acquisition with noise rejection in noisy industrial environments. |
| Analog Peripherals | 2 opamps (reconfigurable buffer/comparator/ADC driver), 2 low-power comparators (active in Deep Sleep), 2 IDACs - enables self-contained analog front-end design without external signal conditioning. |
| Power Modes | Stop Mode: 20 nA, Deep Sleep: ~1.3 µA, Hibernate: SRAM retention - allows battery-powered operation for >10 years in intermittent-sensing applications. |
| GPIO | Up to 36 programmable pins with configurable drive strength, slew rate, and CapSense/LCD/analog/digital roles - eliminates need for external level shifters or routing logic in compact PCB layouts. |
| Communication | 2 × SCBs, each reconfigurable as I²C/SPI/UART - reduces BOM count by consolidating protocol support into shared hardware resources. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 1.71–5.5 V input powering core, analog, and I/O domains; decoupling required per datasheet layout guidelines. |
| VSS | GND reference | Digital and analog ground return; separate analog/digital ground planes recommended for precision ADC operation. |
| P0[0]–P0[7] | Programmable GPIO port 0 | Support CapSense®, LCD segment/common, analog input/output, or digital interface; individually configurable drive modes. |
| P1[0]–P1[7] | Programmable GPIO port 1 | Same functionality as P0; supports high-speed digital routing and analog muxing to internal opamps/ADC. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug interface for programming, real-time tracing, and full chip debugging without JTAG pod or emulator. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up ensures reliable startup when external reset circuitry omitted. |
| XTAL_IN / XTAL_OUT | External crystal oscillator terminals | Support optional 4–25 MHz crystal for precise clock source; internal IMO provides factory-trimmed 48 MHz clock if crystal omitted. |
Key Features
| Feature | Design Value |
|---|---|
| CapSense® Sigma-Delta (CSD) | SNR >5:1 with water tolerance and SmartSense™ automatic hardware tuning - eliminates manual calibration for production touch panels exposed to humidity or condensation. |
| Programmable Analog Subsystem | Opamps usable as unity-gain buffers for ADC inputs or as comparators with hysteresis - reduces external component count in sensor signal chains. |
| Reconfigurable SCBs | Runtime switching between I²C master/slave, SPI master/slave, and UART TX/RX on same pins - simplifies firmware updates and field protocol adaptation without hardware change. |
| TCPWM Kill Signal Triggering | Hardware-level comparator output directly disables PWM outputs within one clock cycle - meets functional safety requirements for motor overcurrent shutdown without CPU intervention. |
| Flash Security Modes | Open/Protected/Kill modes with row-level read/write protection - prevents unauthorized firmware extraction or partial erase attacks in secure IoT edge devices. |
Applications
| Industrial HMI Touch Panel | Smart Sensor Node |
|---|---|
Use Scenario: Capacitive touch buttons and sliders on factory control panel operating in dusty, humid environments with ESD exposure. IC Role / Device Role / Timing Role: Primary MCU and analog front-end; executes CapSense® scanning, processes touch gestures, and communicates status via I²C to host PLC. Use Value: Integrated CSD engine delivers >5:1 SNR and water tolerance without external shielding or recalibration, reducing mechanical enclosure cost and field failure rates. | Use Scenario: Battery-powered temperature/humidity sensor node transmitting data every 5 minutes via UART to LoRaWAN gateway. IC Role / Device Role / Timing Role: System controller and analog signal conditioner; reads sensors via SAR ADC, performs local averaging, enters Deep Sleep between readings. Use Value: 20 nA Stop Mode and programmable wake-up sources extend coin-cell life beyond 5 years while maintaining accurate 12-bit sensor resolution. |
| Motor Control Interface | Programmable Power Sequencer |
Use Scenario: BLDC motor driver board requiring precise PWM timing, overcurrent fault detection, and safe shutdown sequencing. IC Role / Device Role / Timing Role: Timing and protection controller; generates center-aligned PWM, monitors current sense amplifier output, triggers immediate PWM disable on fault. Use Value: Hardware TCPWM kill signal activation ensures <100 ns response to comparator fault - meets IEC 61800-5-2 functional safety timing constraints. | Use Scenario: FPGA or ASIC power management where multiple rails must be enabled in strict voltage/sequence order with monitoring. IC Role / Device Role / Timing Role: Sequencing supervisor and analog monitor; measures rail voltages via ADC, controls enable pins via GPIO, logs faults to SRAM. Use Value: Programmable analog blocks eliminate need for external voltage supervisors and discrete comparators, reducing footprint by 30% vs. discrete solution. |
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-S412 | Lower memory (16 kB flash, 2 kB SRAM), no CapSense® CSD block, same 48-pin TQFP package | Limited to basic control tasks without capacitive sensing or complex UI; lacks SmartSense™ auto-tuning | Select when CapSense® is unnecessary and BOM cost reduction outweighs future firmware scalability needs. |
| STM32F072RBT6 | ARM Cortex-M0, 128 kB flash, 16 kB SRAM, no integrated analog reconfigurability; requires external opamps/IDACs for sensor front-end | Requires additional analog components for precision sensor interfacing; higher PCB area and assembly cost | Select when larger code space and USB 2.0 support are prioritized over analog integration and ultra-low-power sleep modes. |
Compared with CY8C4125PVI-PS421, CY8C4025LQI-S412 sacrifices CapSense® and memory for lower unit cost, while STM32F072RBT6 trades analog integration for greater flash headroom and USB connectivity - making CY8C4125PVI-PS421 optimal for compact, sensor-rich, ultra-low-power designs requiring field-tunable analog behavior.
Availability
CY8C4125PVI-PS421 is available at Aetrix Electronics and suitable for industrial HMI touch panels, smart sensor nodes, motor control interfaces, and programmable power sequencers requiring stable component supply across extended temperature ranges (–40 °C to +105 °C).
Supply support for CY8C4125PVI-PS421 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, microcontrollers, sensors, and security solutions for automotive, industrial, and IoT markets.
This device belongs to the PSoC® 4100 family - a mixed-signal programmable SoC platform designed for embedded applications demanding integrated analog flexibility, ultra-low-power operation, and rapid hardware/firmware co-development using PSoC Creator.
FAQ
Does CY8C4125PVI-PS421 support USB communication?
No. The CY8C4125PVI-PS421 does not include a USB physical layer or USB controller. It supports only I²C, SPI, and UART through its two Serial Communication Blocks (SCBs). For USB connectivity, designers must add an external USB-to-UART bridge IC or select a PSoC 4200L or PSoC 6 device with native USB support.
Can the on-chip opamps drive external loads directly?
Yes - each opamp supports up to 25 mA output current in high-drive external mode, enabling direct driving of small solenoids, LEDs, or transducer bias networks. Internal high-bandwidth mode (up to 12 MHz GBW) is optimized for ADC buffering and closed-loop feedback, while external drive mode prioritizes current delivery over bandwidth.
What debug interfaces are supported, and is JTAG available?
The device supports only Serial Wire Debug (SWD), a 2-pin ARM-standard interface compatible with CMSIS-DAP, Segger J-Link, and Cypress/Infineon KitProg debuggers. JTAG is not implemented; SWD provides full programming, breakpoint, watchpoint, and real-time trace capabilities without requiring additional pins or debug headers.
Is the CapSense® functionality limited to specific pins?
No. All GPIO pins (P0[0]–P0[7], P1[0]–P1[7], P2[0]–P2[7], P3[0]–P3[7], P4[0]–P4[3]) support CapSense® electrode connections. The CSD block routes internally to any pin via the I/O matrix, enabling flexible mechanical layout without dedicated sensor pins or routing constraints.
CY8C4125PVI-PS421 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Series:
- PSOC™ 4 CY8C4100PS
- Packaging:
- Tube
- 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, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 20
- 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, 8x12b SAR; D/A 2x7b, 2x13b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4125PVI-PS421 FAQ
1.How can I place an order for CY8C4125PVI-PS421 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4125PVI-PS421 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 CY8C4125PVI-PS421 reliable?
The price and inventory of CY8C4125PVI-PS421 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4125PVI-PS421 is usually 5 days.
3.What payment methods are accepted for CY8C4125PVI-PS421?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4125PVI-PS421 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4125PVI-PS421?
CY8C4125PVI-PS421 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4125PVI-PS421 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 CY8C4125PVI-PS421?
For technical support, including CY8C4125PVI-PS421 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4125PVI-PS421 requirements.
6.How does Aetrix verify that CY8C4125PVI-PS421 is sourced from the original manufacturer or authorized distributors?
All CY8C4125PVI-PS421 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 CY8C4125PVI-PS421 meets industry standards.
7.What is the process for return or replacement of CY8C4125PVI-PS421?
All CY8C4125PVI-PS421 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4125PVI-PS421, 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 CY8C4125PVI-PS421 part is unused and in its original packaging.
Return procedure for CY8C4125PVI-PS421:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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