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Infineon Technologies CY8C20424-12LQXIT
- Part No.:
- CY8C20424-12LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C20424-12LQXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:87,500
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Product details
Overview
CY8C20424-12LQXIT from Infineon Technologies (formerly Cypress Semiconductor) is a programmable CapSense® PSoC System-on-Chip with an 8-bit M8C CPU core, 8 KB flash, 512 bytes SRAM, and dedicated hardware for capacitive touch sensing - supporting up to 25 buttons, one slider, and 10 cm proximity detection. It operates from 2.4 V to 5.25 V, draws 1.5 mA active current at 3.0 V/12 MHz, and integrates a 6/12 MHz internal main oscillator and 32 kHz low-speed oscillator. Used in notebook multimedia keypads with LED feedback.
For engineers reviewing the CY8C20424-12LQXIT datasheet, CY8C20424-12LQXIT pinout, CY8C20424-12LQXIT application, or CY8C20424-12LQXIT equivalent, key selection criteria include capacitive scan speed (1 kHz nominal), GPIO count (28 pins), integrated LDO (3 V fixed output), I²C/SPI interface support, and bootloader-enabled field reprogramming capability.
Technical Context
The CY8C20424-12LQXIT implements a dedicated CapSense analog block with relaxation oscillator-based sensing, hardware-accelerated scanning, and configurable IDAC reference buffering - enabling noise-immune capacitive measurement without external components. Its M8C CPU runs at up to 12 MHz and manages sensor data via interrupt-driven firmware or autonomous scan modes.
System-level integration includes a 3 V LDO regulator (bypassable), internal 1.8 V analog reference, POR/LVD circuitry, and flexible GPIO drive modes (CMOS, open-drain, high-Z, pull-up). Communication is supported via I²C slave (up to 400 kHz) and SPI master/slave (up to 3 MHz), all routed through the global analog interconnect bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | M8C 8-bit Harvard architecture CPU, 2 MIPS @ 12 MHz - enables real-time CapSense processing with minimal firmware overhead |
| Flash / SRAM | 8 KB flash (50,000 erase/write cycles) + 512 bytes SRAM - supports bootloader, partial updates, and secure firmware storage |
| CapSense Inputs | Up to 25 buttons + 1 slider + 10 cm proximity - hardware-scanned without host CPU intervention |
| Operating Voltage | 2.4 V to 5.25 V - compatible with single Li-ion, USB, or regulated 3.3 V/5 V rails |
| Current Consumption | 1.5 mA active (3.0 V, 12 MHz); 2.8 µA sleep (3.3 V) - suitable for battery-powered touch interfaces |
| Oscillators | Internal 6/12 MHz IMO + 32 kHz ILO - eliminates need for external crystals or timing components |
| I/O Count | 28 GPIOs with configurable drive modes - supports LED control, button sensing, and mixed-signal routing |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.4–5.25 V supply; powers digital core, analog system, and internal LDO |
| VSS | Ground reference | Digital and analog common return; requires low-impedance PCB connection |
| P0[0]–P0[7] | General-purpose I/O | CapSense-capable pins; support button/slider/proximity sensing and LED drive |
| P1[0]–P1[7] | General-purpose I/O | Additional GPIOs with same CapSense and drive-mode flexibility as Port 0 |
| SCL / SDA | I²C interface | Open-drain bidirectional pins for standard-mode (100 kHz) or fast-mode (400 kHz) I²C slave communication |
| SS / MOSI / MISO / SCLK | SPI interface | Configurable as master or slave; supports 3- or 4-wire operation up to 3 MHz |
| XTAL_IN / XTAL_OUT | Crystal oscillator inputs | Unused - device relies on internal IMO/ILO; pins are no-connect in this variant |
| RESET | Active-low reset input | Asynchronous reset pin; accepts 1.8 V–5.25 V logic levels; debounced internally |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated CapSense scanning | 1 kHz nominal scan rate with autonomous relaxation oscillator - reduces CPU load and improves response consistency |
| Integrated 3 V LDO regulator | Fixed 3 V output, 5 V max input, register-bypassable - simplifies power design and supports mixed-voltage I/O |
| Configurable LED drive modes | Fading, strobing, and RGB color mixing via PWM-controlled GPIOs - enables rich user feedback without external drivers |
| In-system serial programming (ISSP) | Two-pin (SCLK/SDATA) programming interface - allows firmware updates through existing I/O without dedicated debug headers |
| CapSense noise immunity | Validated operation through 5 mm acrylic with EMI/AC noise rejection - meets industrial and consumer touch reliability requirements |
Applications
| Consumer Notebook Keypads | Industrial Control Panels |
|---|---|
Use Scenario: Touch-sensitive multimedia keys and slider on laptop palm rest with RGB LED status indicators. IC Role / Device Role / Timing Role: Primary CapSense controller managing button/slider scanning, LED PWM timing, and I²C communication to host EC. Use Value: Eliminates mechanical switches and discrete LED drivers; reduces BOM count by integrating sensing, timing, and interface logic. | Use Scenario: Sealed front-panel HMI for factory automation equipment requiring glove-compatible touch and proximity wake-up. IC Role / Device Role / Timing Role: Standalone capacitive interface processor handling multi-button detection, proximity-triggered wake, and SPI-based MCU communication. Use Value: Enables IP65-rated enclosures with no moving parts; 10 cm proximity sensing allows hands-free activation before physical contact. |
| Home Appliance Touch Controls | Medical Device User Interfaces |
Use Scenario: Wash cycle selector and temperature slider on front panel of smart washing machine with water-resistant overlay. IC Role / Device Role / Timing Role: Dedicated touch controller interfacing to main MCU via I²C; manages self-calibration and wet-finger compensation. Use Value: Maintains reliable operation under condensation or detergent residue; internal algorithms reduce firmware development effort. | Use Scenario: Patient monitor front panel with tactile-free navigation buttons and status LEDs compliant with IEC 60601-1 leakage limits. IC Role / Device Role / Timing Role: Isolated touch interface processor; provides galvanically separated CapSense inputs and LED outputs via opto-coupled or isolated SPI link. Use Value: Meets medical safety standards without external isolation components; low-power sleep mode extends battery life in portable units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C20224-12LQXIT | Same architecture, 16-pin QFN, 14 GPIOs, supports up to 12 CapSense buttons - reduced I/O and memory (4 KB flash) | Limited to simpler UIs (e.g., 4-button remote controls); no slider support | Select when BOM cost and board space are critical and full 25-button/slide capability is unnecessary |
| MTCH101-I/ST | Standalone capacitive controller (no MCU), 8 KB EEPROM, 16-channel scan, 1.7–5.5 V operation - no flash/SRAM or programmable logic | Requires external MCU for system coordination; lacks LED driver PWM and ISSP | Choose for ultra-low-power, fixed-function touch applications where firmware customization is not required |
Compared with CY8C20224-12LQXIT, the CY8C20424-12LQXIT offers 12 more GPIOs, 4 KB more flash, slider support, and enhanced LED control - making it optimal for complex UIs. Versus MTCH101-I/ST, it trades off standalone simplicity for full programmability, integrated MCU, and richer peripheral integration.
Availability
CY8C20424-12LQXIT is available at Aetrix Electronics and suitable for consumer electronics HMI, industrial control panels, and home appliance touch interfaces requiring stable component supply and long-term lifecycle support.
Supply support for CY8C20424-12LQXIT 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 IoT solutions.
This device belongs to the legacy PSoC 1 CapSense family, designed specifically for cost-sensitive, low-power capacitive touch interfaces where integrated analog sensing, programmable logic, and minimal external components are essential.
FAQ
What is the maximum number of capacitive buttons supported by CY8C20424-12LQXIT?
The CY8C20424-12LQXIT supports up to 25 independent capacitive buttons using its dedicated hardware scan engine. This count is confirmed in the CapSense PSoC datasheet (Document Number 001-41947 Rev. *P, page 3) and includes full configurability per button for sensitivity, debounce, and baseline tracking - no firmware overhead required for basic operation.
Does CY8C20424-12LQXIT require an external crystal?
No. The device uses an internal 6/12 MHz main oscillator (IMO) and 32 kHz low-speed oscillator (ILO), eliminating the need for external crystals or resonators. The XTAL_IN/XTAL_OUT pins are no-connect in this variant, as stated in the pinout section (page 7–8 of datasheet 001-41947 Rev. *P).
Can CY8C20424-12LQXIT drive RGB LEDs directly?
Yes. All 28 GPIOs support configurable PWM output with fading and strobing modes, enabling direct RGB LED color mixing without external drivers. This capability is documented in the "Configurable LED behavior" feature list (page 2) and verified in the GPIO electrical characteristics table (page 15) showing 20 mA sink/source capability per pin.
Is there a bootloader included in the 8 KB flash memory?
Yes. The device includes a factory-programmed bootloader occupying a protected region of flash, enabling in-system serial programming (ISSP) via two pins. This allows field firmware updates without dedicated debug hardware, as specified in the "Bootloader for ease of field reprogramming" feature (page 2) and detailed in Application Note AN2292.
CY8C20424-12LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- PSOC™1 CY8C20xxx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 12MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 5.25V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C20424-12LQXIT FAQ
1.How can I place an order for CY8C20424-12LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20424-12LQXIT 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 CY8C20424-12LQXIT reliable?
The price and inventory of CY8C20424-12LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20424-12LQXIT is usually 5 days.
3.What payment methods are accepted for CY8C20424-12LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20424-12LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20424-12LQXIT?
CY8C20424-12LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20424-12LQXIT 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 CY8C20424-12LQXIT?
For technical support, including CY8C20424-12LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20424-12LQXIT requirements.
6.How does Aetrix verify that CY8C20424-12LQXIT is sourced from the original manufacturer or authorized distributors?
All CY8C20424-12LQXIT 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 CY8C20424-12LQXIT meets industry standards.
7.What is the process for return or replacement of CY8C20424-12LQXIT?
All CY8C20424-12LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20424-12LQXIT, 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 CY8C20424-12LQXIT part is unused and in its original packaging.
Return procedure for CY8C20424-12LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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