Infineon Technologies CY8C4014LQI-422

Overview

CY8C4014LQI-422 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, two current DACs (IDACs), one low-power comparator with 1.2-V internal reference, and CapSense® sigma-delta capacitive sensing for touch interfaces in space-constrained consumer and industrial HMI applications.

For engineers reviewing the CY8C4014LQI-422 datasheet, CY8C4014LQI-422 pinout, CY8C4014LQI-422 application, or CY8C4014LQI-422 equivalent, key selection criteria include Deep Sleep wake-up on I²C address match, SmartSense™ auto-tuning across 5–45 pF sensor range, TCPWM block with comparator-triggered kill signals, and SWD debug interface compatibility with industry-standard Arm tools.

Technical Context

The device integrates a tightly coupled Cortex-M0 core with programmable analog (IDACs, 1.2-V comparator) and digital (TCPWM, SCB-I²C) peripherals routed via flexible interconnect. Its clock system combines a factory-trimmed 24-MHz IMO (±2% accuracy) and a 40-kHz ILO for Deep Sleep operation, enabling sub-35 µs wake-up latency.

CapSense® CSD block delivers hardware-accelerated capacitive sensing with SNR > 70 dB and water tolerance, while the single SCB-I²C supports multi-master operation and address-match wake-up during Deep Sleep-critical for battery-powered touch interfaces requiring ultra-low quiescent current.

Key Specifications

Pinout & Package

CY8C4014LQI-422 is housed in a 24-pin QFN (4 × 4 mm, 0.5 mm pitch) package with wettable flanks, optimized for automated optical inspection (AOI) and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4014LQI-421, the -422 offers identical silicon but guarantees 16-MHz CPU operation with calibrated IMO; versus STM32G031F8P6, it trades raw compute power for integrated, production-ready CapSense with <1.3 µA Deep Sleep - making it optimal for cost-sensitive, battery-operated touch HMI where analog subsystem reliability is critical.

Availability

CY8C4014LQI-422 is available at Aetrix Electronics and suitable for smart home touch panels, industrial control keypads, wearable fitness tracker UIs, and medical patient monitor button arrays requiring stable component supply and long-term lifecycle assurance.

Supply support for CY8C4014LQI-422 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® portfolio, delivering programmable analog-digital SoCs for embedded control and human-machine interface applications.

The PSoC 4000 family targets compact, low-power HMI and sensor-processing applications where integrated CapSense, programmable analog, and Arm Cortex-M0 efficiency eliminate discrete component count and reduce PCB area.

FAQ

What is the maximum operating frequency of the CPU in CY8C4014LQI-422?

The CY8C4014LQI-422 features an Arm Cortex-M0 CPU with a maximum operating frequency of 16 MHz. This is achieved using the internal main oscillator (IMO), factory-trimmed to ±2% accuracy at 24 MHz and divided down to 16 MHz for CPU clocking. The Read Accelerator ensures zero-wait-state execution at this speed.

Does CY8C4014LQI-422 support hardware-accelerated capacitive sensing?

Yes. It integrates Cypress CapSense® Sigma-Delta (CSD) hardware with dedicated modulator and IDACs, delivering >70 dB signal-to-noise ratio and built-in SmartSense™ auto-tuning across 5–45 pF sensor capacitance. No external components or host-CPU cycles are required for baseline calibration or drift compensation.

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

Yes. Its single SCB-I²C block supports address-match wake-up during Deep Sleep mode. When configured as a slave, it monitors incoming I²C traffic and asserts a wake-up interrupt upon detecting its assigned 7-bit address - enabling host-initiated interaction without continuous polling or external interrupt lines.

Is debug access permanently disabled after enabling device security?

Yes. When maximum device security is enabled, all programming, debug (SWD), and test interfaces are permanently disabled. Re-enabling debug requires full chip erase, clearing flash protection, and reprogramming with new firmware - making security irreversible and suitable for production firmware with intellectual property protection requirements.