Infineon Technologies CY8C4014SXI-420T

Overview

CY8C4014SXI-420T from Infineon (formerly Cypress) is a programmable System-on-Chip (SoC) integrating an Arm® Cortex™-M0 CPU, CapSense® capacitive sensing, two IDACs, one low-power comparator, and one TCPWM block in an 8-pin SOIC package. It operates from 1.71 V to 5.5 V, supports Deep Sleep wake-up via I²C address match or interrupt, and delivers 16 MHz CPU performance with 16 KB flash and 2 KB SRAM - used in touch-enabled industrial HMI and battery-powered sensor nodes.

For engineers reviewing the CY8C4014SXI-420T datasheet, CY8C4014SXI-420T pinout, CY8C4014SXI-420T application, or CY8C4014SXI-420T equivalent, key selection criteria include its 8-pin SOIC footprint, CapSense sigma-delta architecture with SmartSense™ auto-tuning (5–45 pF), I²C wake-on-address capability in Deep Sleep, and SWD debug interface compatibility with Arm-standard tools.

Technical Context

The device implements a single-core Arm Cortex-M0 CPU running at up to 16 MHz with Thumb-2 instruction set support, zero-wait-state flash access via Read Accelerator, and 24-bit SYSTICK timer. Its analog subsystem centers on a fixed 1.2-V reference-based comparator and two current DACs (IDACs) supporting both general-purpose analog output and CapSense excitation.

Digital resources include one multi-mode TCPWM block (center-aligned, edge, pseudo-random PWM), one SCB-based I²C master/slave with Deep Sleep address detection, and GPIO routing through IOSS with programmable drive strength/slew rate across Ports 0–2 - all coordinated by a single-layer AHB-Lite interconnect and NVIC with eight interrupt inputs.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), 150 mil width, surface-mount, JEDEC MS-012AC compliant. Pinout validated per Cypress/Infineon datasheet 001-89638 Rev. *L, Figure 7 (Page 7).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable SoC applications.

Compared with STM32G030F6P6 and RP2040, CY8C4014SXI-420T uniquely integrates hardware-accelerated CapSense with SmartSense™, enabling production-ready touch interfaces without firmware tuning - critical for medical, appliance, and industrial panels where field reliability outweighs raw compute throughput.

Availability

CY8C4014SXI-420T is available at Aetrix Electronics and suitable for touch-enabled thermostats, smart lighting controls, battery-powered security sensors, and industrial HMI panels requiring stable component supply and long-term manufacturability.

Supply support for CY8C4014SXI-420T 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 AG, headquartered in Munich, Germany, is a global semiconductor leader delivering power systems, microcontrollers, sensors, and security solutions for automotive, industrial, and IoT applications.

This device belongs to the PSoC® 4000 family - designed specifically for cost-sensitive, space-constrained embedded systems requiring integrated capacitive sensing, low-power operation, and rapid firmware development using PSoC Creator.

FAQ

What is the maximum operating frequency of the Arm Cortex-M0 core in CY8C4014SXI-420T?

The Arm Cortex-M0 core runs at up to 16 MHz, enabled by the internal main oscillator (IMO) trimmed to ±2% accuracy at 24 MHz and divided down. This frequency is sustained with zero wait-state flash access due to the integrated Read Accelerator, ensuring deterministic real-time performance for time-critical CapSense and PWM tasks.

Does CY8C4014SXI-420T support hardware debugging in production firmware?

Yes - it features a standard Arm Serial-Wire Debug (SWD) interface accessible via P0[3] (SWDIO) and P0[4] (SWDCK). Debug circuits are enabled by default and can be disabled in firmware; once disabled, re-enabling requires full flash erase. This allows secure field updates while retaining full debug capability during development and qualification.

Can the CapSense functionality operate independently of the CPU core?

No - CapSense measurement is initiated and managed by the CPU, but the CSD hardware block performs sigma-delta conversion autonomously once triggered. The CPU remains free to handle other tasks during measurement cycles, and SmartSense™ auto-tuning runs as background firmware, minimizing active CPU time per scan.

Is external crystal required for accurate timing in Deep Sleep mode?

No - the device uses the internal low-frequency oscillator (ILO) at 40 kHz for Deep Sleep timing, watchdog, and wake-up counters. The ILO consumes <1 µA and is factory-trimmed; optional calibration against the IMO improves long-term accuracy, but no external crystal is needed for basic Deep Sleep operation or I²C wake-up.