Infineon Technologies CY8C4124AXQ-443

Overview

CY8C4124AXQ-443 from Infineon Technologies (formerly Cypress Semiconductor) is a 32-bit Arm® Cortex™-M0 programmable system-on-chip (PSoC® 4100 family) integrating MCU, reconfigurable analog/digital blocks, 12-bit SAR ADC, two opamps, and two SCBs supporting I²C/SPI/UART. It delivers 24 MHz CPU performance, up to 32 kB flash and 4 kB SRAM, and operates from 1.71 V to 5.5 V across –40 °C to +105 °C for industrial embedded control.

For engineers reviewing the CY8C4124AXQ-443 datasheet, CY8C4124AXQ-443 pinout, CY8C4124AXQ-443 application, or CY8C4124AXQ-443 equivalent, key selection criteria include its integrated CapSense® sigma-delta capacitive sensing engine, Deep Sleep mode with 20-nA current draw and GPIO wakeup, programmable LCD drive on all pins, and SWD debug interface with full on-chip debug-on-chip capability.

Technical Context

The device implements a single-layer AHB-Lite interconnect between the Cortex-M0 CPU, SRAM, flash with read accelerator, and peripheral subsystems including TCPWM, SCBs, and CTBm analog blocks. Its clock architecture combines IMO (internal main oscillator) and ILO (internal low-power oscillator), enabling glitch-free switching and precise timing control for mixed-signal operation.

Analog resources include a configurable SAR ADC with differential input, channel sequencer, and signal averaging; two opamps supporting comparator mode and ADC input buffering; and two low-power comparators active in Deep Sleep. Digital flexibility is enabled by DSI (Digital System Interconnect) routing and programmable GPIO drive modes across five ports.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4124LQI-443 and CY8C4245AXI-483, the CY8C4124AXQ-443 uniquely balances industrial-grade packaging, lowest Stop-mode current, and full analog/digital configurability without USB overhead-making it optimal for cost-sensitive, battery-backed, or thermally demanding embedded controllers.

Availability

CY8C4124AXQ-443 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, programmable power supplies, and medical diagnostic handhelds requiring stable component supply and long-term manufacturability.

Supply support for CY8C4124AXQ-443 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 control applications requiring integrated analog signal processing, capacitive sensing, and low-power operation across extended temperature ranges.

FAQ

Does CY8C4124AXQ-443 support USB communication?

No. This part lacks a USBFS (USB Full-Speed) block. USB functionality is available only in higher-tier PSoC 4200-series variants such as CY8C4245AXI-483. The CY8C4124AXQ-443 relies on its two SCBs for I²C, SPI, or UART communication, making it ideal for non-USB industrial interfaces where cost and power efficiency are prioritized.

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

Yes. The internal main oscillator (IMO) is factory-trimmed to 48 MHz and can be divided down to generate the 24 MHz CPU clock. It supports fine-tuning via firmware register writes to adjust for temperature drift or system-level calibration requirements, with typical accuracy of ±2% over temperature and voltage.

Can the opamps be used in transimpedance configuration for photodiode sensing?

Yes. Each opamp supports programmable gain, rail-to-rail output, and selectable input configurations-including inverting, non-inverting, and transimpedance modes. With external feedback resistor and capacitor, they enable direct photodiode current-to-voltage conversion with bandwidth up to 10 MHz (depending on gain and layout), verified in Cypress application note AN85951.

Is the CapSense® implementation compliant with IEC 61000-4-6 conducted immunity standards?

Yes. The CapSense® CSD architecture meets IEC 61000-4-6 Level 3 (10 Vrms, 150 kHz–80 MHz) when implemented per Cypress layout guidelines (AN88619), including shielded traces, dedicated ground planes, and proper decoupling. SmartSense™ auto-tuning dynamically compensates for EMI-induced baseline shifts, ensuring reliable operation in electrically noisy industrial settings.