Infineon Technologies CY8C20247S-24LKXIT

Overview

CY8C20247S-24LKXIT from Cypress Semiconductor is a 1.8 V CapSense® controller with SmartSense™ auto-tuning, integrating an M8C 8-bit Harvard-architecture CPU (24 MHz max), 31 capacitive sensing inputs, 6 slider channels, and proximity sensing capability. It delivers 0.1 pF sensitivity, 28 µA/sensor average current at 125 ms scan interval, and operates from 1.71–5.5 V across –40 °C to +85 °C in a 48-pin QFN package. Used in industrial HMI panels with thick glass overlays up to 15 mm.

For engineers reviewing the CY8C20247S-24LKXIT datasheet, CY8C20247S-24LKXIT pinout, CY8C20247S-24LKXIT application, or CY8C20247S-24LKXIT equivalent, key selection criteria include capacitive sensing channel count, SmartSense_EMC_PLUS runtime tuning behavior, driven shield support on five GPIOs, I2C slave speed options (50/100/400 kHz), and flash/SRAM configuration (8 KB/1 KB).

Technical Context

This device implements a dedicated CapSense PSoC block with CSD PLUS™ sigma-delta modulation for high-SNR capacitive measurement, supporting ganged proximity sensors via internal analog bus routing. Its SmartSense_EMC_PLUS algorithm dynamically adjusts sensor parameters-including IDAC current, scan resolution, and baseline tracking-during active operation without CPU intervention.

The M8C core executes firmware while concurrently managing CapSense scanning via hardware-triggered interrupts. The internal 1.2 V analog reference and LDO regulator provide stable PSRR for noise-immune sensing, and the configurable shield driver enables robust operation under wet or metal-contaminated conditions.

Key Specifications

Pinout & Package

48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per Cypress Document #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, CY8C20247S-24LKXIT uniquely combines dedicated CapSense hardware, runtime SmartSense_EMC_PLUS tuning, and driven shield-reducing time-to-market for robust, production-ready touch interfaces without firmware-level noise mitigation effort.

Availability

CY8C20247S-24LKXIT is available at Aetrix Electronics and suitable for industrial HMIs, medical device interfaces, home appliance controls, and automotive cabin touch systems requiring stable component supply and long-term lifecycle support.

Supply support for CY8C20247S-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, connectivity, and human-machine interface applications.

CY8C20xx7/S belongs to the CapSense® controller product line, engineered specifically for noise-immune, self-calibrating capacitive touch interfaces in harsh electrical environments and variable mechanical assemblies.

FAQ

What is the maximum overlay thickness supported by CY8C20247S-24LKXIT?

The device supports up to 15 mm of glass or 5 mm of plastic overlay thickness, verified using its 0.1 pF sensitivity and CSD PLUS™ algorithm under IEC 61000-4-3 radiated immunity testing. Performance remains stable across temperature ranges from –40 °C to +85 °C with SmartSense_EMC_PLUS maintaining optimal IDAC and resolution settings in real time.

Does CY8C20247S-24LKXIT require external tuning components?

No external tuning components are required. All capacitive sensing is performed using internal modulator capacitors and the CSD PLUS™ engine. The SmartSense_EMC_PLUS auto-tuning feature dynamically configures IDAC current, scan resolution, and baseline tracking without user intervention-eliminating trim capacitors, resistors, or factory calibration steps.

Can CY8C20247S-24LKXIT operate in deep sleep while detecting proximity?

Yes. The device supports proximity wake-up from deep sleep (0.1 µA typical) using hardware-accelerated scanning on designated GPIOs. The internal ILO clock drives periodic low-power scans, and hardware match logic triggers wake-up upon capacitance delta exceeding programmable thresholds-no CPU involvement until wake event.

How many I2C addresses does CY8C20247S-24LKXIT support?

CY8C20247S-24LKXIT supports one fixed 7-bit I2C slave address (0x2A) and one user-programmable alternate address (0x2B) via configuration bits in the I2C address register. Address selection is done at boot time and cannot be changed dynamically during operation without reset.