Infineon Technologies CY8C4014LQI-SLT2

Overview

CY8C4014LQI-SLT2 from Cypress Semiconductor is a 32-bit ARM Cortex-M0 programmable system-on-chip (PSoC) with 16 KB flash, 2 KB SRAM, integrated CapSense capacitive sensing, two programmable IDACs, one low-power comparator, and a multi-master I²C interface. It operates from 1.71 V to 5.5 V and supports Deep Sleep mode with 35 µs wake-up latency. It is used in touch-enabled human interface modules for consumer electronics and industrial control panels.

For engineers reviewing the CY8C4014LQI-SLT2 datasheet, CY8C4014LQI-SLT2 pinout, CY8C4014LQI-SLT2 application, or CY8C4014LQI-SLT2 equivalent, key selection criteria include its 20 GPIO count with CapSense support, 16-bit TCPWM block with Kill input for motor safety, SmartSense™ auto-tuning, SWD debug interface, and I²C address-match wake-up capability in Deep Sleep.

Technical Context

The device integrates a Cortex-M0 CPU running at up to 16 MHz with zero-wait-state flash and SRAM access, supported by an IMO (24–48 MHz, ±2% accuracy) and ILO (40 kHz) clock system. Its analog subsystem includes two current DACs (IDACs) with ±5% reference tolerance and a 1.2-V-referenced comparator shared with CapSense.

Digital peripherals are routed via a programmable interconnect matrix: one SCB implements I²C (up to 400 kbps, 8-deep FIFO, EZI2C mode), one TCPWM provides center-aligned/edge-aligned PWM with hardware-triggered Kill signal, and GPIOs support configurable drive modes across Ports 0–2.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 mm × 4 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 STM32F030F4P6 and MAX32660, CY8C4014LQI-SLT2 uniquely combines hardware-accelerated capacitive sensing, ultra-low-power I²C wake-up, and programmable analog routing-making it optimal for touch-centric embedded systems where reliability, power efficiency, and design flexibility are co-prioritized.

Availability

CY8C4014LQI-SLT2 is available at Aetrix Electronics and suitable for touch-enabled home appliances, industrial HMIs, and USB-C accessory monitoring requiring stable component supply and long-term manufacturing continuity.

Supply support for CY8C4014LQI-SLT2 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

Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, offering PSoC architecture with configurable analog/digital resources and robust development tools.

The PSoC 4000 family targets cost-optimized, low-power embedded applications needing integrated capacitive sensing, basic connectivity, and flexible peripheral routing-ideal for space-constrained touch interfaces and smart peripherals.

FAQ

What is the maximum operating frequency of the ARM Cortex-M0 core in CY8C4014LQI-SLT2?

The CPU runs at up to 16 MHz with zero wait-state flash access. The internal main oscillator (IMO) is factory-trimmed to 24 MHz and can be scaled to 32 or 48 MHz; however, the CPU clock divider limits the core frequency to 16 MHz maximum for this device variant. This ensures deterministic timing and low-power operation while maintaining compatibility with PSoC Creator's clock configuration tools.

Does CY8C4014LQI-SLT2 support true hardware-based capacitive sensing without external components?

Yes. It integrates Cypress's proprietary Capacitive Sigma-Delta (CSD) sensing engine with dedicated analog routing, IDACs, and comparator-enabling self-contained touch button, slider, and proximity sensing using only PCB traces. No external RC networks, op-amps, or dedicated touch controllers are required. SmartSense™ firmware automatically calibrates baseline and sensitivity per sensor.

Can the I²C interface wake the device from Deep Sleep using only the target address-not full transaction?

Yes. The SCB I²C block supports address-only wake-up: when configured as a slave, it detects its own 7-bit or 10-bit address on the bus while in Deep Sleep and asserts an interrupt to wake the CPU-without receiving data bytes or acknowledging the transaction. This reduces system power by eliminating periodic polling and enables event-driven communication.

Is the SWD debug interface permanently enabled, and can it be disabled for security?

The SWD interface is enabled by default after reset. It can be disabled in firmware via the DEBUG_SELECT register; once disabled, re-enabling requires full chip erase, clearing flash protection bits, and reprogramming. With device security fully enabled, all debug, programming, and test interfaces-including SWD-are permanently locked, preventing post-deployment firmware extraction or modification.