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Infineon Technologies CY8C20234-12LKXI
- Part No.:
- CY8C20234-12LKXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C20234-12LKXI.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,448
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Product details
Overview
CY8C20234-12LKXI from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® System-on-Chip with integrated CapSense® capacitive sensing engine, M8C CPU core running at up to 12 MHz, 8 KB flash, 512 bytes SRAM, and operating voltage range of 2.4 V to 5.25 V. It supports up to 28 GPIOs configurable as analog inputs or digital I/Os, and targets embedded human interface applications such as touch buttons, sliders, and proximity detection in industrial control panels and consumer appliances.
For engineers reviewing the CY8C20234-12LKXI datasheet, CY8C20234-12LKXI pinout, CY8C20234-12LKXI application, or CY8C20234-12LKXI equivalent, this device is selected for low-power capacitive touch systems requiring on-chip analog sensing, I²C/SPI communication, and flexible firmware-defined peripheral configuration without external components.
Technical Context
The CY8C20234-12LKXI implements a dedicated hardware CapSense® block based on relaxation oscillator (RO) architecture, enabling self-contained capacitive scanning across up to 28 pins without external RC networks. Its M8C Harvard-architecture CPU executes instructions at up to 12 MHz while supporting sleep modes with 32 kHz internal low-speed oscillator (ILO) for watchdog and timing.
System resources include an I²C slave interface configurable for 50/100/400 kHz operation, SPI master/slave supporting 46.9 kHz–3 MHz clock rates, internal 1.8 V analog reference, and a 3.0 V LDO regulator with bypass mode for port 1 I/O supply. All GPIOs support 20 mA sink current and programmable drive modes including pull-up, open-drain, and CMOS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, up to 12 MHz - enables deterministic real-time touch response with <10 µs interrupt latency. |
| Flash Memory | 8 KB with 50,000 erase/write cycles - supports field firmware updates and secure partial reprogramming. |
| SRAM | 512 bytes - sufficient for CapSense scan buffers, state variables, and lightweight application logic. |
| CapSense Inputs | Up to 28 GPIO-configurable channels - eliminates need for external touch controller ICs or discrete RC networks. |
| Operating Voltage | 2.4 V to 5.25 V - compatible with both 3.3 V and 5 V system rails without level-shifting. |
| I²C Speed | Selectable 50/100/400 kHz - interoperable with standard microcontrollers and host processors in HMI subsystems. |
| Temperature Range | –40 °C to +85 °C - qualified for industrial and extended commercial environments. |
Pinout & Package
Package: 28-pin SOIC (Small Outline Integrated Circuit), body width 7.5 mm, lead pitch 1.27 mm, JEDEC MS-012AC compliant. RoHS-compliant, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 2.4–5.25 V; powers digital core, CapSense block, and internal LDO output stage. |
| VSS | Ground reference | Common return path for all digital and analog circuits; must be low-impedance for stable CapSense performance. |
| P0[0]–P0[7] | General-purpose I/O with analog mux | Configurable as CapSense input, digital I/O, or analog input; each supports 20 mA sink capability. |
| P1[0]–P1[7] | Digital I/O with regulated 3.0 V supply | Powered by internal LDO; supports strong 5 mA drive mode and total 20 mA port source current. |
| SCL / SDA | I²C bus interface | Open-drain, 5 V tolerant; enable host communication for configuration, calibration, and status reporting. |
| CSCLK | CapSense clock input | Optional external clock source for precise relaxation oscillator timing; default uses internal IMO. |
| RESET | Active-low reset input | Asynchronous hardware reset; debounced internally; compatible with pushbutton or supervisor IC assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated CapSense® hardware block | Enables autonomous capacitive scanning with built-in baseline tracking and noise rejection-no CPU overhead during sensing. |
| Configurable analog multiplexer | Connects any GPIO to internal analog bus, allowing dynamic routing of touch sensors, comparators, or IDAC references. |
| Internal 1.8 V analog reference | Provides stable, temperature-compensated reference for CapSense comparator-eliminates need for external precision voltage source. |
| Programmable I/O drive modes | Per-pin selection of pull-up, high-Z, open-drain, or CMOS drive-supports mixed-signal interfacing with LEDs, switches, and sensors. |
| In-system serial programming (ISSP) | Allows full flash programming and debugging via two-wire interface using standard ISP tools-no dedicated debug header required. |
Applications
| Home Appliance Control Panel | Industrial HMI Keypad |
|---|---|
|
Use Scenario: Touch-sensitive front panel on microwave oven or washing machine with waterproof overlay and ESD immunity requirements. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing up to 20 buttons and slider, performing real-time scan and debouncing in hardware. Use Value: Reduces BOM cost by replacing mechanical switches and external touch ASIC; achieves >100 k-cycle lifetime with no moving parts. |
Use Scenario: Operator interface on PLC-mounted control box exposed to vibration, dust, and wide ambient temperature swings. IC Role / Device Role / Timing Role: Standalone touch processor handling button press detection, LED feedback control, and I²C communication with main controller. Use Value: Industrial temperature rating (–40 °C to +85 °C) and robust CapSense noise immunity ensure reliable operation in electrically noisy factory environments. |
| Medical Device Touch Interface | Smart Thermostat Front Panel |
|
Use Scenario: Non-invasive patient monitor with glove-compatible touch controls and low-power sleep mode between interactions. IC Role / Device Role / Timing Role: Low-power CapSense coordinator scanning 12 buttons at 10 Hz in active mode and waking host MCU only on valid touch event. Use Value: Achieves <5 µA deep-sleep current with ILO-enabled wake-on-touch-extends battery life in portable medical devices. |
Use Scenario: Wall-mounted HVAC controller with glass-front capacitive slider for temperature adjustment and multi-function buttons. IC Role / Device Role / Timing Role: Touch sensor hub managing proximity wake-up, slider position interpolation, and LED dimming via PWM outputs. Use Value: On-chip analog mux and IDAC allow adaptive sensitivity tuning per sensor-compensates for glass thickness and environmental drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATtiny412-MFR | AVR 8-bit MCU with QTouch® library; no dedicated CapSense hardware-requires CPU cycles for sensing. | Limited to ≤12 touch channels; higher firmware complexity for noise filtering and auto-tuning. | Prefer when existing AVR toolchain is used and touch channel count is low; avoid for high-noise or fast-response applications. |
| STM32F070F6P6 | Cortex-M0+ MCU with capacitive sensing library (CSL); requires external RC network per channel or ADC-based approach. | Higher power consumption in active sensing; lacks hardware-accelerated baseline tracking and auto-calibration. | Choose if ARM ecosystem integration is mandatory and system already includes STM32 peripherals; not drop-in for CapSense-specific designs. |
Compared with ATtiny412-MFR and STM32F070F6P6, CY8C20234-12LKXI delivers lower system-level power, faster scan throughput, and reduced firmware development effort due to its purpose-built CapSense hardware block and integrated analog signal chain.
Availability
CY8C20234-12LKXI is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI keypads, medical device touch interfaces, and smart thermostat front panels requiring stable component supply and long-term manufacturing continuity.
Supply support for CY8C20234-12LKXI 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 with emphasis on reliability, security, and energy efficiency.
CY8C20234-12LKXI belongs to the PSoC® CapSense® family, designed specifically to replace mechanical buttons and external touch controllers in cost-sensitive, low-power human interface applications with single-chip programmability and hardware-accelerated sensing.
FAQ
What is the maximum number of capacitive touch sensors supported by CY8C20234-12LKXI?
The CY8C20234-12LKXI supports up to 28 capacitive touch inputs, all configurable on GPIO pins without external components. This includes combinations of buttons, sliders, touchpads, and proximity sensors, with hardware-accelerated scanning and baseline tracking handled entirely within the dedicated CapSense block.
Does CY8C20234-12LKXI require an external crystal or resonator?
No. The device includes an internal ±5% 6/12 MHz main oscillator (IMO) and a 32 kHz low-speed oscillator (ILO) for sleep and watchdog functions. External clocks are optional-for example, CSCLK may be driven externally for enhanced timing accuracy-but not required for basic CapSense or MCU operation.
Can CY8C20234-12LKXI operate from a 3.3 V supply?
Yes. The device operates across 2.4 V to 5.25 V, making it fully compatible with standard 3.3 V system rails. Its internal LDO provides a regulated 3.0 V output for port 1 I/Os, and all GPIOs are 5 V tolerant when configured as inputs-even when powered from 3.3 V.
Is PSoC Designer software still supported for CY8C20234-12LKXI development?
Yes. PSoC Designer™ remains the official IDE for CY8C20x34 devices. It is a free Windows-based tool that supports drag-and-drop hardware configuration, C firmware development, CapSense tuning, and in-circuit debugging via ISSP. Infineon continues to host legacy documentation, application notes, and TRMs for this family on www.infineon.com.
CY8C20234-12LKXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN
- Series:
- PSOC™1 CY8C20xxx
- Packaging:
- Tray
- 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:
- 13
- 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:
CY8C20234-12LKXI FAQ
1.How can I place an order for CY8C20234-12LKXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20234-12LKXI 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 CY8C20234-12LKXI reliable?
The price and inventory of CY8C20234-12LKXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20234-12LKXI is usually 5 days.
3.What payment methods are accepted for CY8C20234-12LKXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20234-12LKXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20234-12LKXI?
CY8C20234-12LKXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20234-12LKXI 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 CY8C20234-12LKXI?
For technical support, including CY8C20234-12LKXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20234-12LKXI requirements.
6.How does Aetrix verify that CY8C20234-12LKXI is sourced from the original manufacturer or authorized distributors?
All CY8C20234-12LKXI 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 CY8C20234-12LKXI meets industry standards.
7.What is the process for return or replacement of CY8C20234-12LKXI?
All CY8C20234-12LKXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20234-12LKXI, 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 CY8C20234-12LKXI part is unused and in its original packaging.
Return procedure for CY8C20234-12LKXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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