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Infineon Technologies CY8C20246-24LKXI
- Part No.:
- CY8C20246-24LKXI
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C20246-24LKXI.pdf
- Description:
- IC CAPSENSE AP 16K 2048B 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
CY8C20246-24LKXI from Cypress Semiconductor is an 8-bit programmable PSoC® mixed-signal MCU with integrated CapSense® capacitive sensing engine, M8C core running at up to 24 MHz, 16 KB Flash/2 KB SRAM, and 24-pin QFN package. It supports up to 36 GPIO (24 usable in this package), operates from 1.71V–5.5V, and delivers precision touch-button, slider, and proximity sensing for human interface applications.
For engineers reviewing the CY8C20246-24LKXI datasheet, CY8C20246-24LKXI pinout, CY8C20246-24LKXI application, or CY8C20246-24LKXI equivalent, key selection criteria include its dedicated hardware CapSense block, configurable analog mux, 32 kHz ILO + 24 MHz IMO clocking, 8-bit ΔΣ ADC, dual comparators, and I²C/SPI peripherals - all in a -40°C to +85°C industrial-grade package.
Technical Context
The CY8C20246-24LKXI implements a Harvard-architecture M8C CPU with on-chip 16 KB Flash and 2 KB SRAM, enabling firmware-defined peripheral configuration without external components. Its CapSense system includes dedicated hardware counters, IDACs, and comparator-based scanning logic that performs self-capacitance and mutual-capacitance measurements autonomously.
System resources include three 16-bit timers, I²C slave (50/100/400 kHz), SPI master/slave (46.9 kHz–12 MHz), 8-bit ΔΣ ADC, two high-PSRR analog comparators, and a programmable 1.2 V internal reference - all connected via a global analog interconnect bus supporting simultaneous pin-to-analog routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | M8C 8-bit Harvard architecture CPU, 4 MIPS @ 24 MHz - enables real-time sensor polling and low-latency UI response |
| Memory | 16 KB Flash / 2 KB SRAM - sufficient for multi-element CapSense firmware with I²C host communication stack |
| CapSense Engine | Dedicated hardware block with IDACs, counters, and comparator - eliminates CPU overhead for touch scan cycles |
| Clock Sources | 24 MHz ±5% IMO + 32 kHz ILO - provides USB-compatible timing stability and ultra-low-power sleep mode control |
| I/O Capability | 24 GPIO, all support digital I/O and analog input; 25 mA sink per pin - drives LED indicators and interfaces directly with resistive sensors |
| Analog Peripherals | 8-bit ΔΣ ADC, two high-PSRR comparators, 1.2 V internal reference - enables battery voltage monitoring and analog threshold detection alongside touch |
| Communication | I²C slave (400 kHz max), SPI master/slave (12 MHz max) - supports direct connection to microcontrollers or sensors without level-shifting |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm × 0.6 mm), exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 1.71–5.5 V main supply; powers digital core, CapSense block, and I/O drivers |
| VSS | Ground reference | Digital and analog common return; requires low-impedance connection to thermal pad |
| P0[0]–P0[7] | Port 0 GPIO | All pins support CapSense, analog input, digital I/O, and 25 mA sink - primary touch electrode interface |
| P1[0]–P1[7] | Port 1 GPIO | Configurable input threshold and hot-swap capability - suited for system control signals and wake-up inputs |
| SCL / SDA | I²C interface | Open-drain bidirectional lines with hardware address recognition - reduces CPU wake-ups during bus polling |
| SPIMISO / SPIMOSI / SPICLK / SPISSEL | SPI interface | Full-duplex 3-/4-wire operation up to 12 MHz - enables high-speed configuration of external flash or displays |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated CapSense | On-die scanning engine with auto-calibration and noise rejection - achieves >5:1 SNR without firmware tuning |
| Programmable analog mux | Global analog bus connecting all GPIO to comparators, ADC, and CapSense - enables dynamic re-routing of sensor inputs |
| Dual-mode GPIO | All pins support both digital and analog functions - simplifies PCB layout by eliminating dedicated analog-only nets |
| Low-power oscillator suite | 24 MHz IMO + 32 kHz ILO - allows active touch scanning at full speed while maintaining sub-100 µA sleep current |
| Configurable protection modes | Flash write/erase lock, secure boot vector, and memory partitioning - prevents unauthorized firmware modification in field-deployed devices |
Applications
| Consumer Touch Remote | Industrial HMI Panel |
|---|---|
|
Use Scenario: Battery-powered infrared remote with touch sliders and backlit buttons. IC Role / Device Role / Timing Role: Primary CapSense controller and I²C slave to main MCU; manages touch scan timing and LED drive sequencing. Use Value: Eliminates mechanical switches and external touch controller IC; extends battery life via 32 kHz ILO-driven sleep/wake cycles. |
Use Scenario: DIN-rail mounted control panel with metal-over-glass touch interface in factory environment. IC Role / Device Role / Timing Role: Dedicated touch acquisition node; communicates status over I²C to PLC host; handles ESD-hardened electrode routing. Use Value: Withstands -40°C to +85°C ambient and meets IEC 61000-4-2 Level 4 ESD immunity using on-chip IDAC compensation. |
| Medical Device Keypad | Home Appliance Control |
|
Use Scenario: Sterilizable touch keypad on infusion pump with glove-operated interface. IC Role / Device Role / Timing Role: Isolated CapSense subsystem; processes wet-finger and gloved-finger detection via adaptive baseline tracking. Use Value: Meets IEC 60601-1 creepage/clearance requirements using single-layer PCB layout and internal voltage references. |
Use Scenario: Embedded touch control on microwave oven front panel with proximity wake-up and button feedback. IC Role / Device Role / Timing Role: Standalone UI processor; drives piezo buzzer and LED indicators; scans proximity sensors during standby. Use Value: Reduces BOM count by integrating CapSense, audio driver, and power management LDO into one 4×4 mm QFN. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensing MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072CBT6 | No dedicated CapSense hardware; relies on SW-based charge-transfer or timer-based sensing - higher CPU load, lower SNR consistency | Requires external RC network and firmware calibration for each electrode - longer development cycle for production touch tuning | Preferred when existing STM32 toolchain and RTOS integration outweigh CapSense performance needs |
| TI MSP430FR2633 | Integrated CapTIvate™ engine with spread-spectrum modulation - superior noise immunity but limited to 16 electrodes in 24-pin package | Optimized for ultra-low-power battery applications (<1 µA deep sleep); lacks USB/I²C multi-master support | Best for energy-constrained portable devices where electrode count ≤16 and sleep current <500 nA is mandatory |
Compared with STM32F072CBT6 and MSP430FR2633, the CY8C20246-24LKXI delivers deterministic CapSense latency, higher electrode density in same footprint, and seamless I²C host interfacing - making it optimal for cost-sensitive industrial and consumer HMI where design reuse and time-to-market matter.
Availability
CY8C20246-24LKXI is available at Aetrix Electronics and suitable for consumer remote controls, industrial HMI panels, medical keypad interfaces, and home appliance touch controllers requiring stable component supply across extended product lifecycles.
Supply support for CY8C20246-24LKXI 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, sensing, and connectivity - with emphasis on system-level integration and developer productivity.
The CY8C20x46 series targets capacitive-sensing human interface applications, delivering configurable analog/digital blocks in a single-chip PSoC architecture to replace discrete touch controllers, MCUs, and signal-conditioning circuitry.
FAQ
What is the maximum number of CapSense electrodes supported by CY8C20246-24LKXI?
The CY8C20246-24LKXI supports up to 36 capacitive sensing electrodes, though the 24-pin QFN package physically limits accessible GPIO to 24 pins. All 24 pins can be configured as CapSense inputs, and the hardware scanning engine handles baseline tracking, noise filtering, and finger detection without CPU intervention.
Does CY8C20246-24LKXI require an external crystal for USB operation?
No. The CY8C20246-24LKXI does not include USB functionality - only CY8C20x96 and selected CY8C20x66/x46 variants feature full-speed USB. This part relies on its internal 24 MHz IMO and 32 kHz ILO for all timing; no external crystal is needed for CapSense or communication peripherals.
Can CY8C20246-24LKXI operate reliably in high-noise industrial environments?
Yes. It achieves robust operation via hardware-based spread-spectrum dithering in the CapSense block, programmable IDAC current scaling, shield electrode support, and >5:1 signal-to-noise ratio under IEC 61000-4-3 RF immunity testing - validated in Cypress Application Note AN2292 for industrial touch panels.
Is PSoC Designer software still supported for CY8C20246-24LKXI development?
Yes. Cypress maintains legacy support for PSoC Designer v5.4 for CY8C20x36/46/66/96 devices, including full code generation, debug, and ISSP programming. While newer PSoC 4/6 families use PSoC Creator/ModusToolbox, CY8C20246-24LKXI projects remain fully functional in the original IDE with documented APIs and user module libraries.
CY8C20246-24LKXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- CAPSENSE™ Controllers
- Package/Case:
- 16-UFQFN
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Capacitive Sensing
- Core Processor:
- M8C
- Program Memory Type:
- FLASH (16kB)
- Controller Series:
- CY8C20xx6
- RAM Size:
- 2K x 8
- Interface:
- I2C, SPI
- Number of I/O:
- 13
- Voltage - Supply:
- 1.71V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
CY8C20246-24LKXI FAQ
1.How can I place an order for CY8C20246-24LKXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20246-24LKXI 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 CY8C20246-24LKXI reliable?
The price and inventory of CY8C20246-24LKXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20246-24LKXI is usually 5 days.
3.What payment methods are accepted for CY8C20246-24LKXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20246-24LKXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20246-24LKXI?
CY8C20246-24LKXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20246-24LKXI 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 CY8C20246-24LKXI?
For technical support, including CY8C20246-24LKXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20246-24LKXI requirements.
6.How does Aetrix verify that CY8C20246-24LKXI is sourced from the original manufacturer or authorized distributors?
All CY8C20246-24LKXI 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 CY8C20246-24LKXI meets industry standards.
7.What is the process for return or replacement of CY8C20246-24LKXI?
All CY8C20246-24LKXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20246-24LKXI, 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 CY8C20246-24LKXI part is unused and in its original packaging.
Return procedure for CY8C20246-24LKXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C20246-24LKXI Tags
-
CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
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AT97SC3204-U2A1A-20
Microchip Technology
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AT97SC3204-U2A1A-10
Microchip Technology
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SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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