Infineon Technologies CY8C4014LQI-SLT1

Overview

CY8C4014LQI-SLT1 from Infineon Technologies (acquired 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 industrial HMI panels.

For engineers reviewing the CY8C4014LQI-SLT1 datasheet, CY8C4014LQI-SLT1 pinout, CY8C4014LQI-SLT1 application, or CY8C4014LQI-SLT1 equivalent, key selection criteria include CapSense SNR performance, I²C address-match wake-up capability in Deep Sleep, TCPWM dead-band complementary PWM support, and flash protection configuration options.

Technical Context

The device integrates a single-core ARM Cortex-M0 CPU running at up to 16 MHz with zero-wait-state flash access and 2 KB of SRAM. Its analog subsystem includes two current DACs (IDACs) with ±5% reference accuracy and a 1.2-V comparator used for both threshold detection and CapSense modulation.

Digital peripherals are routed via a programmable interconnect matrix: the SCB block implements full multi-master I²C (up to 400 kbps) with 8-deep RX/TX FIFOs and address-match wake-up during Deep Sleep; the TCPWM block delivers center-aligned/edge-aligned PWM with hardware-triggered Kill input for motor control safety.

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 MAX32660GWE+T, CY8C4014LQI-SLT1 uniquely delivers production-ready CapSense with hardware-accelerated tuning, I²C wake-up in sub-10 µA Deep Sleep, and integrated analog routing-reducing total system BOM count and qualification effort for touch-centric designs.

Availability

CY8C4014LQI-SLT1 is available at Aetrix Electronics and suitable for industrial HMI panels, smart home touch controls, medical device keypads, and automotive cabin controls requiring stable component supply and long-term lifecycle assurance.

Supply support for CY8C4014LQI-SLT1 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 owns the PSoC® portfolio. Infineon is a global semiconductor leader focused on power systems, automotive, and industrial 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 prototyping via PSoC Creator IDE.

FAQ

What is the maximum operating frequency of the ARM Cortex-M0 core in CY8C4014LQI-SLT1?

The CPU runs at up to 16 MHz with zero wait-state flash access. The internal main oscillator (IMO) is factory-trimmed to ±2% accuracy at 24 MHz and can be divided down to generate the 16 MHz CPU clock. No external crystal is required for full-speed operation, though an external clock source may be used via P0.4.

Does CY8C4014LQI-SLT1 support hardware-accelerated capacitive touch sensing?

Yes. It integrates Cypress's Capacitive Sigma-Delta (CSD) engine with dedicated hardware modulator and demodulator, delivering >100 dB SNR and water tolerance. SmartSense™ auto-tuning adjusts sensing parameters in real time without firmware intervention, enabling reliable operation across environmental variations.

Can the I²C interface wake the device from Deep Sleep mode?

Yes. The SCB I²C block supports address-match wake-up while in Deep Sleep mode. When configured as a slave, it monitors incoming addresses and asserts a wake-up event upon match - enabling ultra-low-power peripheral polling without CPU involvement until needed.

What debug interface does CY8C4014LQI-SLT1 use, and is external hardware required?

It uses the 2-pin Serial Wire Debug (SWD) interface (SWDIO and SWCLK). No external emulator or debugger pod is required - standard production devices support full programming, breakpoint, and watchpoint debugging using industry-standard tools like Segger J-Link or Cypress KitProg2.