Infineon Technologies CY8C20247-24LKXIT

Overview

CY8C20247-24LKXIT from Cypress Semiconductor is a 1.8 V CapSense® controller with SmartSense™ auto-tuning, featuring 31 capacitive sensing inputs, 6 slider channels, and proximity sensing capability. It integrates an M8C 8-bit Harvard-architecture CPU (24 MHz), 8 KB flash/1 KB SRAM, I²C slave (up to 400 kHz), and driven-shield support on five GPIOs for water-tolerant HMI designs in consumer appliances.

For engineers reviewing the CY8C20247-24LKXIT datasheet, CY8C20247-24LKXIT pinout, CY8C20247-24LKXIT application, or CY8C20247-24LKXIT equivalent, key selection criteria include its 0.1 pF sensitivity, 28 µA/sensor active current, SmartSense_EMC_PLUS runtime tuning, 48-pin QFN package, and integrated CSD PLUS™ sigma-delta sensing engine.

Technical Context

The device implements a dedicated CapSense PSoC block with Capacitive Sigma Delta PLUS (CSD PLUS™) sensing algorithm, enabling high-SNR measurement without external components. Its analog system includes a 1 V/1.2 V internal reference, configurable analog mux bus connecting all GPIOs, and hardware-controlled precharge logic for fast scan cycles across up to 31 inputs.

SmartSense_EMC_PLUS operates autonomously during runtime-dynamically adjusting IDAC, scan resolution, and baseline tracking per sensor to maintain performance across environmental drift, overlay thickness variation (up to 15 mm glass), and conducted/radiated noise. The driven shield function on five GPIOs actively cancels parasitic capacitance, enabling robust operation near metal or under wet conditions.

Key Specifications

Pinout & Package

48-pin QFN (7 × 7 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant. Pinout validated per Cypress datasheet 001-69257 Rev. *Q, Page 12.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar capacitive sensing controller applications.

Compared with MTCH101-I/ST and STM32F072CBT6, CY8C20247-24LKXIT delivers out-of-box robustness for high-channel-count, multi-sensor HMI with zero tuning overhead-critical for rapid qualification and volume manufacturing of sealed industrial or medical interfaces.

Availability

CY8C20247-24LKXIT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, medical device interfaces, and consumer proximity-sensing systems requiring stable component supply and long-term lifecycle support.

Supply support for CY8C20247-24LKXIT 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 system-on-chip solutions for embedded control, sensing, and connectivity applications worldwide.

This device belongs to the PSoC® 1 CapSense® controller product line, engineered specifically for high-reliability, low-power capacitive touch and proximity interfaces in harsh or sealed environments.

FAQ

What is the maximum overlay thickness supported by CY8C20247-24LKXIT?

The device supports up to 15 mm of glass or 5 mm of plastic overlay thickness, verified per Cypress datasheet 001-69257 Rev. *Q Section 1. Features. This capability is enabled by its 0.1 pF sensitivity and CSD PLUS™ algorithm's high SNR performance, which maintains stable signal-to-noise ratio under thick dielectrics.

Does CY8C20247-24LKXIT require external tuning during production?

No. SmartSense_EMC_PLUS auto-tuning dynamically adjusts IDAC, scan resolution, and baseline tracking per sensor during runtime. Cypress confirms this eliminates manual tuning across PCB stack-up variations, overlay material differences, and environmental changes-verified in Application Note AN76115.

Can CY8C20247-24LKXIT operate from a single 3.0 V coin cell battery?

Yes. With 1.71–5.5 V operating range and 0.1 µA deep sleep current, it supports coin cell operation for multi-year battery life in low-duty-cycle proximity applications. Active current is 28 µA/sensor at 125 ms scan interval, enabling >5-year operation on CR2032 in typical HMI use cases.

How many GPIOs support driven shield functionality?

Five GPIOs support driven shield: P0[0], P0[1], P0[2], P0[3], and P0[4]. This is documented in the "Shield Driver DC Specifications" section (Page 20) and "Pinouts" section (Page 12) of datasheet 001-69257 Rev. *Q. Driven shield improves water tolerance and enables longer trace lengths up to 100 pF load.