Infineon Technologies CY8C4014LQI-422T

Overview

CY8C4014LQI-422T from Infineon (formerly Cypress) is a 32-bit programmable system-on-chip (PSoC® 4000 family) microcontroller featuring an Arm® Cortex™-M0 CPU running at 16 MHz, 16 KB flash with Read Accelerator, 2 KB SRAM, integrated CapSense® sigma-delta capacitive sensing, two current DACs (IDACs), one low-power comparator, and one 16-bit TCPWM block. It targets compact embedded systems requiring touch interfaces, low-power operation, and mixed-signal integration - such as smart home sensors and portable medical devices.

For engineers reviewing the CY8C4014LQI-422T datasheet, CY8C4014LQI-422T pinout, CY8C4014LQI-422T application, or CY8C4014LQI-422T equivalent, key selection criteria include its 16-pin QFN package, 1.71–5.5 V supply range, Deep Sleep wake-up on I²C address match, SmartSense™ auto-tuning for 5–45 pF sensors, and SWD debug interface compatibility with industry-standard tools.

Technical Context

The device integrates a Cortex-M0 core with tightly coupled flash accelerator enabling zero-wait-state execution at 16 MHz, and a dedicated analog subsystem supporting capacitive sensing via CSD architecture with >60 dB SNR. Its clock system combines a factory-trimmed 24/32 MHz IMO and a 40 kHz ILO to support precise timing in Active and Deep Sleep modes.

CapSense functionality is implemented in hardware with automatic SmartSense™ tuning, while the single TCPWM block supports center-aligned, edge-aligned, and pseudo-random PWM generation with comparator-triggered kill signals - critical for motor control safety logic and LED dimming precision.

Key Specifications

Pinout & Package

Package: 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch), RoHS-compliant, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4014LQI-422T, the -421T variant adds extended temperature support without functional trade-offs, while the STM32F030F4P6 lacks hardware-accelerated capacitive sensing - making it unsuitable for designs requiring production-grade touch reliability, water tolerance, or rapid CapSense development.

Availability

CY8C4014LQI-422T is available at Aetrix Electronics and suitable for smart home interfaces, portable medical sensors, industrial HMIs, and wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for CY8C4014LQI-422T 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 acquired Cypress Semiconductor in 2020 and now develops, manufactures, and supports the PSoC® family of programmable SoCs for embedded control and human-machine interface applications.

The PSoC 4000 product line targets cost-sensitive, space-constrained embedded systems needing integrated analog, capacitive sensing, and Arm-based processing - with emphasis on rapid prototyping, low-power operation, and production-ready touch solutions.

FAQ

What is the maximum operating frequency of the Arm Cortex-M0 core in CY8C4014LQI-422T?

The CY8C4014LQI-422T operates its Arm Cortex-M0 CPU at a maximum frequency of 16 MHz. This is achieved using the internal main oscillator (IMO), which is factory-trimmed to ±2% accuracy at 24 MHz and can be configured to run at 16 MHz via clock dividers. The flash Read Accelerator ensures zero-wait-state execution at this speed.

Does CY8C4014LQI-422T support hardware-based capacitive touch sensing without external components?

Yes. CY8C4014LQI-422T integrates Cypress's CapSense Sigma-Delta (CSD) engine with SmartSense™ auto-tuning, enabling production-ready capacitive touch sensing using only PCB traces as electrodes. No external RC networks, op-amps, or calibration firmware are required - the hardware handles modulation, demodulation, and baseline tracking autonomously.

Can CY8C4014LQI-422T wake from Deep Sleep using I²C communication?

Yes. Its SCB-I²C block supports address-match wake-up while the CPU and high-speed clocks are disabled. When configured as a slave, it monitors incoming I²C traffic and asserts a wake-up interrupt upon detecting its assigned 7-bit address - allowing host processors or sensors to initiate communication without maintaining system-level power.

What debug interface does CY8C4014LQI-422T use, and is external hardware required?

CY8C4014LQI-422T uses the standard Arm Serial Wire Debug (SWD) 2-wire interface (SWDIO and SWCLK pins). No emulator or JTAG pod is needed - programming and full source-level debugging are supported directly via MiniProg3 or any CMSIS-DAP-compliant debug probe, with breakpoints and watchpoints fully functional in the production device.