Infineon Technologies CY8C4125PVI-482

Overview

CY8C4125PVI-482 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 806 ksps SAR ADC, two opamps with comparator mode, and two SCBs supporting I²C/SPI/UART. It operates from 1.71 V to 5.5 V and supports Deep Sleep mode with 20-nA current draw. Used in capacitive touch HMI, industrial sensor nodes, and low-power embedded controllers.

For engineers reviewing the CY8C4125PVI-482 datasheet, CY8C4125PVI-482 pinout, CY8C4125PVI-482 application, or CY8C4125PVI-482 equivalent, key selection criteria include its 32 kB flash / 4 kB SRAM memory footprint, CapSense Sigma-Delta (CSD) support with >5:1 SNR, 48-pin TQFP package with 36 GPIOs, and integrated TCPWM blocks for motor control timing.

Technical Context

The device implements a single-layer AHB-Lite interconnect between CPU, memory, and peripherals, with dedicated clock domains managed by IMO (24 MHz internal main oscillator) and ILO (33 kHz internal low-power oscillator). Power management includes five modes-Active, Sleep, Deep Sleep, Hibernate, and Stop-with hardware-controlled transitions and wake-up via GPIO or peripheral interrupts.

Analog subsystem features include two programmable opamps supporting high-drive external output or high-bandwidth internal buffering, plus a SAR ADC with differential input, channel sequencer, and signal averaging. Digital logic is implemented via DSI (Digital System Interconnect), enabling routing of signals between fixed-function and programmable blocks without external wiring.

Key Specifications

Pinout & Package

Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, surface-mount. Thermal pad exposed on bottom for enhanced heat dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal controller applications.

Compared with CY8C4125PVI-482, CY8C4025LQI-482 reduces memory and removes CapSense hardware, lowering cost but limiting HMI capability; STM32F072RBT6 offers more memory and USB but adds external component dependencies for analog functions and touch.

Availability

CY8C4125PVI-482 is available at Aetrix Electronics and suitable for industrial sensor nodes, capacitive touch HMIs, motor control interfaces, and programmable power sequencers requiring stable component supply across extended temperature ranges (–40 °C to +105 °C).

Supply support for CY8C4125PVI-482 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, specializing in power management, automotive MCUs, and secure connectivity solutions.

This device belongs to the PSoC® 4100 family - a scalable, mixed-signal programmable SoC platform designed for embedded control applications requiring integrated analog, digital, and capacitive sensing capabilities in compact form factors.

FAQ

What debug interface does CY8C4125PVI-482 support?

CY8C4125PVI-482 uses the Arm Serial Wire Debug (SWD) interface with two-wire connectivity (SWDCLK and SWDIO). It supports full on-chip programming, real-time breakpoints, and data watchpoints. Debug is enabled by default and can be disabled in firmware; re-enabling requires full flash erase and reprogramming.

Does CY8C4125PVI-482 support capacitive touch through glass overlays?

Yes - it integrates Cypress CapSense Sigma-Delta (CSD) hardware with >5:1 signal-to-noise ratio and built-in water tolerance. Tested operation through 3-mm thick glass is documented in AN85951 and validated in production designs for appliance panels and medical devices.

Can the SAR ADC operate during Deep Sleep mode?

No - the 12-bit SAR ADC requires Active or Sleep mode. However, the device supports low-power comparators that remain operational in Deep Sleep and can trigger wake-up events or initiate ADC conversion upon exit from Deep Sleep.

What is the maximum operating frequency of the internal main oscillator (IMO)?

The internal main oscillator (IMO) is factory-trimmed to 24 MHz with ±2% accuracy across –40 °C to +105 °C. It serves as the primary clock source for CPU, flash accelerator, and most peripherals unless overridden by an external crystal or PLL-derived clock.