Infineon Technologies CY8C4014LQI-412

Overview

CY8C4014LQI-412 from Infineon (formerly Cypress) is a PSoC 4000-series programmable system-on-chip featuring a 16-MHz Arm Cortex-M0 CPU, 16 KB flash, 2 KB SRAM, integrated CapSense sigma-delta capacitive sensing, two IDACs, one low-power comparator, and one TCPWM block. It targets compact embedded control with touch interface, such as smart appliance panels and industrial HMI.

For engineers reviewing the CY8C4014LQI-412 datasheet, CY8C4014LQI-412 pinout, CY8C4014LQI-412 application, or CY8C4014LQI-412 equivalent, key selection criteria include its 16-pin QFN package, Deep Sleep wake-up on I²C address match, SmartSense™ auto-tuning for 5–45 pF sensors, and SWD debug support without external pods.

Technical Context

The device implements a single-core Arm Cortex-M0 CPU with NVIC (8 interrupts), SYSTICK timer, and Serial Wire Debug (SWD) interface with four breakpoint and two watchpoint comparators. Flash includes a Read Accelerator enabling zero-wait-state access at 16 MHz, and SRAM provides full-speed 2 KB storage.

Analog subsystem integrates a 1.2-V referenced low-power comparator (with up to 16 GPIO inputs), two current DACs (IDACs) with ±5% reference accuracy, and CapSense CSD engine delivering high SNR and water tolerance. Digital peripherals include one multi-mode TCPWM block and a single SCB-I²C supporting address-match wake-up in Deep Sleep.

Key Specifications

Pinout & Package

CY8C4014LQI-412 uses a 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across Ports 0 and 1, supporting configurable GPIO, CapSense, analog input, and I²C communication.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4014SXI-412, the LQI variant offers superior thermal dissipation and board density; versus STM32G030F6P6, it delivers turnkey capacitive sensing with hardware acceleration, eliminating algorithm porting and field recalibration overhead.

Availability

CY8C4014LQI-412 is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI button arrays, and smart thermostat keypads requiring stable component supply, long-term lifecycle assurance, and qualified traceable sourcing.

Supply support for CY8C4014LQI-412 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 manufactures and supports the full PSoC portfolio, including automotive-grade, industrial, and consumer MCUs with integrated analog and programmable logic.

The PSoC 4000 family targets cost-sensitive, space-constrained embedded systems needing integrated capacitive sensing, low-power operation, and rapid firmware-hardware co-design - especially where analog flexibility and touch reliability outweigh raw compute throughput.

FAQ

What debug interface does CY8C4014LQI-412 support?

CY8C4014LQI-412 uses a 2-pin Serial Wire Debug (SWD) interface compliant with Arm CoreSight standards. It supports full chip visibility including breakpoints, watchpoints, memory read/write, and register inspection. No external debug pod or emulator is required - only SWDIO and SWCLK connections plus power and ground are needed for programming and real-time debugging via PSoC Creator or third-party tools like Segger J-Link.

Does CY8C4014LQI-412 support true hardware-based capacitive sensing?

Yes - it integrates Cypress's dedicated CapSense Sigma-Delta (CSD) engine, a hardware-accelerated analog front-end with built-in modulator, integrator, and digital filtering. This delivers >100:1 signal-to-noise ratio and automatic compensation for environmental drift, eliminating reliance on software-based polling or RC decay timing methods used in general-purpose MCUs.

Can CY8C4014LQI-412 operate from a single 3.3-V supply?

Yes - it operates across 1.71 V to 5.5 V, fully supporting 3.3 V ±10% nominal supply. At 3.3 V, the internal LDO regulates core voltage, flash and SRAM retain zero-wait-state performance at 16 MHz, and all GPIOs are 5-V tolerant when configured as inputs, enabling direct interfacing with legacy 5-V peripherals without level shifters.

Is SmartSense™ tuning available out-of-box without firmware development?

Yes - SmartSense™ is a hardware + firmware feature delivered via Cypress-supplied CapSense Component in PSoC Creator. With default configuration, it automatically calibrates baseline, sensitivity, and noise thresholds during initialization and runtime, requiring only electrode assignment and threshold definition - no custom algorithm coding or sensor-specific tuning tables are needed.