Infineon Technologies CY8C4125AXQ-483

Overview

CY8C4125AXQ-483 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 control.

For engineers reviewing the CY8C4125AXQ-483 datasheet, CY8C4125AXQ-483 pinout, CY8C4125AXQ-483 application, or CY8C4125AXQ-483 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 Cortex-M0 CPU, SRAM, flash, and peripherals including two serial communication blocks (SCBs), four 16-bit TCPWM units, and a programmable analog subsystem with SAR ADC and opamp-comparator hybrids. Clocking relies on internal IMO (24 MHz) and ILO (100 kHz) oscillators with glitch-free switching.

Power management includes five modes-Active, Sleep, Deep Sleep, Hibernate, and Stop-with dedicated wake-up interrupt controller (WIC) enabling sub-20-nA retention in Deep Sleep. Debug uses Arm Serial Wire Debug (SWD) with four breakpoint and two watchpoint comparators, fully supported by PSoC Creator IDE.

Key Specifications

Pinout & Package

Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4125AXQ-483, CY8C4126AZI-S433 offers identical functionality in a smaller QFN package but sacrifices XRES flexibility, while STM32F072RBT6 provides higher clock speed and memory but lacks the PSoC's reconfigurable analog/digital fabric and CapSense engine - making it less suitable for touch-centric or mixed-signal rapid prototyping.

Availability

CY8C4125AXQ-483 is available at Aetrix Electronics and suitable for industrial sensor nodes, capacitive touch HMIs, motor control interfaces, and programmable logic replacements requiring stable component supply and long-term lifecycle support.

Supply support for CY8C4125AXQ-483 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, industrial, and IoT solutions with strong emphasis on security and reliability.

CY8C4125AXQ-483 belongs to the PSoC® 4100 family - designed specifically for embedded systems requiring integrated analog/digital programmability, ultra-low-power operation, and rapid hardware-software co-design in resource-constrained environments.

FAQ

Does CY8C4125AXQ-483 support USB connectivity?

No. The device does not include a USB PHY or USB controller. Communication is limited to the two reconfigurable SCBs supporting I²C, SPI, and UART protocols. For USB host/device functionality, an external USB-to-UART bridge (e.g., CP2102) or migration to PSoC 4200L (with USBFS) is required.

Can the SAR ADC perform simultaneous sampling on multiple channels?

No. The single 12-bit SAR ADC supports sequential sampling via its channel sequencer with hardware-triggered averaging, but lacks dual or interleaved ADC cores for true simultaneous acquisition. Multi-channel synchronization must be achieved through software-controlled sequencing with tight timing loops.

What debug interfaces are available, and can they be disabled permanently?

CY8C4125AXQ-483 supports only Arm Serial Wire Debug (SWD) using SWDIO and SWDCK pins. Debug is enabled by default and can be disabled in firmware; however, re-enabling requires full flash erase. In "Kill" security mode, debug access is irreversibly disabled, preventing external programming or analysis.

Is the 48-pin TQFP package compatible with standard reflow profiles for lead-free soldering?

Yes. The CY8C4125AXQ-483 uses a standard JEDEC MS-026 48-pin TQFP package rated for lead-free reflow. Peak temperature must not exceed 260 °C for ≤60 seconds, with ramp-up rate ≤3 °C/s and ramp-down rate ≤6 °C/s per IPC/JEDEC J-STD-020D.1 specifications.