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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies CY8C20055-24LKXIT

Name: CY8C20055-24LKXIT
Brand: Infineon Technologies
SKU: CY8C20055-24LKXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY8C20055-24LKXIT

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 16-UFQFN

Datasheet:: CY8C20055-24LKXIT.pdf

Description:: IC CAPSENSE 8K FLASH 16 QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CY8C20055-24LKXIT from Infineon Technologies (formerly Cypress Semiconductor) is a capacitive-sensing PSoC 1 mixed-signal programmable system-on-chip featuring an 8-bit M8C CPU core, integrated CapSense® charge-transfer sensing engine, 8 KB flash, 512 B SRAM, and 16-pin SOIC package. It supports up to 20 self- or mutual-capacitance sensors, operates from 2.4–5.25 V, and delivers <1 µA deep-sleep current for battery-powered touch interfaces in consumer electronics.

For engineers reviewing the CY8C20055-24LKXIT datasheet, CY8C20055-24LKXIT pinout, CY8C20055-24LKXIT application, or CY8C20055-24LKXIT equivalent, this device is selected for low-power capacitive touch control where integrated analog front-end, on-chip oscillator calibration, and factory-trimmed IMO accuracy (±2% over temperature) eliminate external timing components and reduce BOM count.

Technical Context

The CY8C20055 implements a dedicated hardware CapSense® block with configurable IDACs (up to 62.5 µA), programmable scan resolution (8–16 bits), and built-in baseline tracking and noise filtering. Its M8C core executes firmware at up to 24 MHz using internal IMO (Internal Main Oscillator) with automatic frequency calibration against ECO or ILO references.

System-level resources include I²C slave interface (up to 400 kHz), programmable timers, GPIO with configurable drive strength and slew rate, and dual oscillators (IMO + ILO) enabling precise sleep/wake timing and sensor scan synchronization without external clocks.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	M8C 8-bit RISC core, 24 MHz max operation - enables real-time sensor processing with deterministic interrupt latency.
Flash Memory	8 KB flash with 100 k-cycle endurance - sufficient for CapSense firmware plus user logic and configuration tables.
CapSense Channels	Up to 20 capacitive sensing inputs - supports complex touchpads, sliders, and proximity detection without external ADC or controller.
Supply Voltage	2.4 V to 5.25 V - compatible with single-cell Li-ion, 3.3 V, and 5 V systems without level-shifting.
Deep-Sleep Current	<1 µA typical - extends battery life in remote controls, wearables, and IoT endpoints requiring periodic wake-on-touch.
IMO Accuracy	±2% over –40°C to +85°C with auto-calibration - eliminates need for external crystal in cost-sensitive touch applications.
I²C Interface	Standard-mode and fast-mode slave only (up to 400 kHz) - enables host MCU communication for configuration and data reporting.

Pinout & Package

Package: 16-pin SOIC (300 mil, 1.27 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply input	Main supply rail (2.4–5.25 V); decoupling capacitor required near pin for stable CapSense operation.
VSS	Ground reference	Digital and analog ground return; must be low-impedance connection to minimize noise coupling into sensing paths.
P0[0]–P0[7]	General-purpose I/O / CapSense input	Configurable as GPIO or dedicated CapSense electrode; supports self- and mutual-capacitance measurement with internal IDAC.
P1[0]–P1[3]	General-purpose I/O	GPIO-only pins; no CapSense capability; support pull-up/down, open-drain, and analog input modes.
SCL, SDA	I²C bus interface	Hardware I²C slave interface; requires external pull-ups; supports host read/write of CapSense results and configuration registers.
XRES	External reset input	Active-low asynchronous reset; internally pulled up; debounced externally for reliable power-on and fault recovery.
XTAL_IN/XTAL_OUT	External crystal oscillator terminals	Optional 32.768 kHz crystal connection for precise low-power timing; not required when using calibrated IMO.

Key Features

Feature	Design Value
Integrated CapSense® Engine	Dedicated hardware block performs charge-transfer sensing, baseline tracking, and noise rejection without CPU intervention - reduces firmware overhead and improves scan consistency.
Auto-Calibrated IMO	Internal main oscillator trimmed using ILO or ECO reference - achieves ±2% accuracy across voltage and temperature, removing crystal dependency and saving PCB space.
Low-Power Sensor Scanning	CapSense scans can execute in deep-sleep mode with wake-on-event - enables sub-µA average current in always-on touch interfaces.
Configurable IDAC Range	Programmable current sources (1.56 µA to 62.5 µA in 16 steps) - allows optimization of signal-to-noise ratio for varying electrode size, overlay thickness, and environmental conditions.
Factory-Trimmed Reference	On-die 1.2 V bandgap reference with ±1% initial tolerance - ensures stable CapSense thresholding and consistent touch response across production units.

Applications

Smart Home Remote Control

Industrial HMI Panel

Use Scenario: A handheld IR remote with touch-sensitive buttons and slider volume control, powered by CR2032 coin cell.

IC Role / Device Role / Timing Role: Primary capacitive touch controller; handles all electrode scanning, debouncing, gesture decoding, and I²C reporting to host MCU.

Use Value: Deep-sleep current <1 µA extends battery life beyond 2 years; integrated IMO eliminates crystal, reducing component count and layout complexity.

Use Scenario: Sealed front-panel operator interface for PLC-controlled machinery with glove-compatible touch response.

IC Role / Device Role / Timing Role: Standalone touch acquisition node; performs real-time noise-immune sensing under EMI-heavy factory environments.

Use Value: Hardware-based baseline tracking and spread-spectrum scanning reject 50/60 Hz interference and RF noise without firmware tuning.

Medical Device Keypad

Consumer Appliance Touchpad

Use Scenario: Disinfectant-resistant touch keypad on infusion pump with IP65-rated enclosure and thick glass overlay.

IC Role / Device Role / Timing Role: Dedicated CapSense subsystem managing 12 keys and status LEDs via GPIO drive.

Use Value: Adjustable IDAC range compensates for variable parasitic capacitance caused by overlay thickness and material - ensures reliable actuation across product variants.

Use Scenario: Washable kitchen appliance control panel (microwave, oven) with water-tolerant projected capacitance design.

IC Role / Device Role / Timing Role: Self-contained touch processor executing proximity wake, key press, and slide gestures independently.

Use Value: Built-in water rejection algorithm (via firmware library) distinguishes rain droplets from finger touch - prevents false triggers during cleaning.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F070CBT6	ARM Cortex-M0 core, no dedicated CapSense hardware; requires software-based CSD or external touch controller IC.	Higher BOM cost and firmware development effort needed to match CY8C20055's scan performance and noise immunity.	Select when existing STM32 ecosystem and toolchain justify added firmware complexity and external component integration.
ATtiny412-MFR	AVR core with event system and CCL peripherals; supports basic capacitive sensing but lacks integrated IDACs and hardware baseline tracking.	Limited to ≤8 electrodes; no factory-trimmed reference or auto-calibrated oscillator - requires manual calibration per unit.	Select for ultra-low-cost, low-channel-count applications where production test time and calibration labor are acceptable.

Compared with STM32F070CBT6 and ATtiny412-MFR, CY8C20055-24LKXIT delivers lower total system cost and faster time-to-market for touch interfaces requiring >8 electrodes, robust noise immunity, and guaranteed sub-µA sleep - due to its purpose-built CapSense hardware and factory-trimmed analog resources.

Availability

CY8C20055-24LKXIT is available at Aetrix Electronics and suitable for smart home remotes, industrial HMIs, medical keypads, and consumer appliance touchpads requiring stable component supply and long-term manufacturability.

Supply support for CY8C20055-24LKXIT 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and security solutions.

CY8C20055 belongs to the PSoC 1 family - a legacy programmable mixed-signal array designed specifically for cost-sensitive, low-power capacitive touch and analog-sensing applications in consumer and industrial end equipment.

FAQ

What development tools support CY8C20055-24LKXIT firmware programming?

CY8C20055-24LKXIT is programmed using Cypress PSoC Designer 5.4 (legacy IDE), which provides graphical CapSense configuration, M8C assembly/C code editing, and on-chip debugging via SWD. Programming requires MiniProg1 or compatible programmer; no JTAG interface is present. Firmware updates are performed in-system via I²C or dedicated programming pins.

Does CY8C20055-24LKXIT support mutual capacitance sensing?

Yes, CY8C20055-24LKXIT supports both self-capacitance and mutual-capacitance sensing modes through its dedicated CapSense hardware block. Mutual-capacitance configuration requires pairing adjacent GPIO pins as transmit/receive channels and is enabled via register settings in the CapSense configuration structure. Up to 10 mutual-capacitance segments are supported.

Can the internal IMO be used without external crystal calibration?

Yes - the IMO operates autonomously with factory-trimmed default settings (±5% accuracy). For ±2% accuracy across temperature and voltage, optional calibration against the internal ILO or external 32.768 kHz crystal is performed at startup or runtime using the SROM Calibrate0/Calibrate1 functions. No external crystal is required for basic operation.

Is CY8C20055-24LKXIT qualified for automotive applications?

No - CY8C20055-24LKXIT is specified for industrial and commercial temperature ranges (–40°C to +85°C) and is not AEC-Q200 qualified. It lacks automotive-specific features such as enhanced ESD protection (HBM >8 kV), extended temperature screening, or PPAP documentation. For automotive touch applications, Infineon recommends the PSoC 4 or Traveo II families.

CY8C20055-24LKXIT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 16-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Applications:: Capacitive Sensing

Core Processor:: M8C

Program Memory Type:: -

Controller Series:: CY8C20055

RAM Size:: -

Interface:: -

Number of I/O:: 12

Voltage - Supply:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x3)

CY8C20055-24LKXIT FAQ

1.How can I place an order for CY8C20055-24LKXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY8C20055-24LKXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY8C20055-24LKXIT reliable?

The price and inventory of CY8C20055-24LKXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20055-24LKXIT is usually 5 days.

3.What payment methods are accepted for CY8C20055-24LKXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20055-24LKXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY8C20055-24LKXIT?

CY8C20055-24LKXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY8C20055-24LKXIT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY8C20055-24LKXIT?

For technical support, including CY8C20055-24LKXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20055-24LKXIT requirements.

6.How does Aetrix verify that CY8C20055-24LKXIT is sourced from the original manufacturer or authorized distributors?

All CY8C20055-24LKXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C20055-24LKXIT meets industry standards.

7.What is the process for return or replacement of CY8C20055-24LKXIT?

All CY8C20055-24LKXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20055-24LKXIT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY8C20055-24LKXIT part is unused and in its original packaging.

Return procedure for CY8C20055-24LKXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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