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Infineon Technologies CY8C20234-12LKXIT
- Part No.:
- CY8C20234-12LKXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C20234-12LKXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,799
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Product details
Overview
CY8C20234-12LKXIT from Infineon Technologies (formerly Cypress) is a programmable PSoC® System-on-Chip with integrated CapSense® capacitive sensing controller, an 8-bit M8C Harvard-architecture CPU running up to 12 MHz, 8 KB flash, 512 bytes SRAM, and operating voltage range of 2.4 V to 5.25 V across –40 °C to +85 °C industrial temperature range. It supports up to 28 GPIOs configurable as CapSense inputs for touch buttons, sliders, and proximity sensing in human interface applications.
For engineers reviewing the CY8C20234-12LKXIT datasheet, CY8C20234-12LKXIT pinout, CY8C20234-12LKXIT application, or CY8C20234-12LKXIT equivalent, key selection criteria include its dedicated hardware-accelerated CapSense block, I²C/SPI communication support (up to 400 kHz / 3 MHz), internal 6/12 MHz oscillator, 3.0 V regulated I/O on Port 1, and low-power operation at 2.4 V minimum supply.
Technical Context
The device implements a fixed-function CapSense analog subsystem with relaxation oscillator-based charge-transfer sensing, comparator-driven noise-immune measurement, and hardware scan sequencing - eliminating firmware overhead for baseline tracking and signal processing. Its M8C core executes instructions from on-chip flash with interrupt-driven event handling for real-time touch response.
System-level timing relies on dual oscillators: a ±5% 6/12 MHz IMO for active-mode execution and a 32 kHz ILO for sleep/wake and watchdog functions. All 28 GPIOs route to a common analog global bus, enabling flexible sensor routing without external muxing or PCB layer rework.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 12 MHz max clock - enables deterministic real-time CapSense scanning within <10 ms per 10-sensor group. |
| CapSense Inputs | Up to 28 GPIO-configurable channels - supports simultaneous button/slider/proximity detection without external components. |
| Memory | 8 KB flash (50,000 erase/write cycles), 512 bytes SRAM - sufficient for full CapSense firmware plus application logic in compact embedded UIs. |
| Operating Voltage | 2.4 V to 5.25 V - compatible with single-cell Li-ion, 3.3 V, and 5 V system rails without level-shifting. |
| I/O Drive | 20 mA sink per GPIO, 20 mA total source on regulated Port 1 (3.0 V) - drives LEDs or small indicators directly alongside touch sensing. |
| Communication | I²C slave (50/100/400 kHz), SPI master/slave (46.9 kHz–3 MHz) - enables host MCU integration with minimal pin count and configurable timing margins. |
| Temperature Range | –40 °C to +85 °C - qualified for industrial control panels, automotive cabin interfaces, and medical device front-ends. |
Pinout & Package
Package: 28-pin SOIC (300 mil width), RoHS-compliant, lead-free, JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main 2.4–5.25 V supply for digital core and analog array; bypass capacitor required near pin. |
| VSS | Ground reference | Digital and analog ground return; must be low-impedance connection to minimize CapSense noise. |
| P0[0]–P0[7] | General-purpose I/O | Configurable as CapSense inputs, digital I/O, or analog inputs; all connect to analog global bus. |
| P1[0]–P1[7] | Regulated I/O port | Internally regulated to 3.0 V; supports strong-drive mode (5 mA) and total 20 mA sourcing capability. |
| P2[0]–P2[7] | General-purpose I/O | Supports CapSense, digital I/O, and analog input; shares analog mux with P0/P1/P3. |
| P3[0]–P3[3] | General-purpose I/O | Additional CapSense-capable pins; usable for extended slider or multi-zone proximity sensing. |
| SCL / SDA | I²C interface | Dedicated open-drain pins for I²C slave communication; internal pull-ups available via firmware configuration. |
| SSN / MOSI / MISO / SCLK | SPI interface | Configurable as SPI master or slave; supports 3- or 4-wire operation with programmable clock polarity and phase. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated CapSense hardware block | Offloads touch sensing to dedicated analog circuitry - eliminates CPU polling, reduces firmware complexity, and ensures consistent scan timing. |
| Configurable analog global bus | Enables any GPIO to connect to CapSense comparator or IDAC - supports arbitrary sensor layouts without PCB redesign. |
| Internal 3.0 V LDO on Port 1 | Provides stable regulated output for LED drive or external analog sensors - removes need for discrete LDO in space-constrained UI designs. |
| Hardware-accelerated relaxation oscillator | Generates precise CSCLK for capacitance-to-digital conversion - immune to supply ripple and temperature drift, improving touch stability. |
| Partial flash update support | Allows field firmware updates without erasing entire program memory - critical for maintaining CapSense calibration data across revisions. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
Use Scenario: Stainless steel oven control panel with 12 capacitive buttons and 3-segment slider for temperature adjustment. IC Role / Device Role / Timing Role: Primary CapSense controller executing real-time scan, baseline correction, and I²C reporting to main MCU every 25 ms. Use Value: Immune to water droplets and glove operation due to adaptive thresholding and hardware noise rejection - meets IEC 60730 Class B requirements. | Use Scenario: DIN-rail mounted PLC operator terminal with 8-button function pad and proximity wake-up zone. IC Role / Device Role / Timing Role: Standalone touch interface processor managing low-power sleep/wake cycles and sending button events over SPI to host controller. Use Value: 2.4 V minimum operation enables direct use of 2.7 V backup battery during main power loss - maintains UI responsiveness during brownout. |
| Medical Device Keypad | Automotive Cabin Switch |
Use Scenario: Disinfectant-resistant infusion pump keypad with 6 tactile-equivalent buttons and ESD-hardened overlay. IC Role / Device Role / Timing Role: Isolated CapSense subsystem communicating via I²C to safety-certified main controller; handles all touch filtering and debounce. Use Value: Internal 1.8 V analog reference and comparator noise immunity ensure reliable operation under ESD bursts per IEC 61000-4-2 Level 4. | Use Scenario: Ambient-light-adaptive door lock switch with proximity wake and backlit capacitive icons. IC Role / Device Role / Timing Role: Dual-role device: CapSense controller for touch/proximity and LED driver for icon illumination using Port 1's 3.0 V regulated output. Use Value: Integrated 20 mA sink per GPIO and 20 mA total Port 1 source drive LEDs directly - eliminates discrete LED drivers and saves PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensing controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C20134-12LKXIT | Same architecture, 16-pin SOIC, 16 GPIO - fewer CapSense channels and no Port 1 regulation. | Limited to simple 4–6 button interfaces; unsuitable for sliders or multi-zone proximity. | Select when board space is constrained and sensor count ≤16; verify I/O drive capability matches LED load. |
| CY8C20334-12LKXIT | Same package, 28-pin SOIC, but adds 4 analog blocks and 12 additional digital resources - higher cost, larger die. | Over-spec'd for pure CapSense; justified only if future firmware expansion requires analog comparators or timers. | Choose only if roadmap includes adding analog signal conditioning or PWM motor control alongside touch. |
Compared with CY8C20134-12LKXIT, CY8C20234-12LKXIT provides full 28-GPIO CapSense scalability and regulated Port 1 drive; versus CY8C20334-12LKXIT, it delivers optimal cost/performance balance for dedicated touch interfaces without redundant analog resources.
Availability
CY8C20234-12LKXIT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI touch interfaces, and medical device keypads requiring stable component supply, long-term lifecycle support, and qualification-grade reliability.
Supply support for CY8C20234-12LKXIT 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, delivering power systems, microcontrollers, sensors, and security solutions for industrial, automotive, and IoT applications.
This device belongs to the legacy PSoC® 1 family - designed specifically for cost-sensitive, low-power capacitive touch interfaces where hardware-accelerated sensing and minimal external components are essential.
FAQ
Is CY8C20234-12LKXIT pin-compatible with other CY8C20x34 variants?
Yes - all CY8C20x34 devices in the 28-pin SOIC package share identical pinouts and footprint. CY8C20234-12LKXIT, CY8C20334-12LKXIT, and CY8C20434-12LKXIT use the same mechanical layout and electrical pin assignments, enabling drop-in replacement where firmware and resource usage align.
Does CY8C20234-12LKXIT support I²C multi-master operation?
No - the integrated I²C module operates exclusively as a slave device. It responds to address-matched commands from a master controller and does not implement arbitration, clock stretching, or multi-master collision detection logic per the I²C specification.
Can the internal 3.0 V LDO on Port 1 power external analog sensors?
Yes - the LDO output on Port 1 is accessible via P1[0]–P1[7] pins when configured in regulated mode. It delivers up to 20 mA total current with ±2% regulation, suitable for powering low-current analog sensors like thermistors or small op-amps, provided total load remains within spec.
What development tools are required to program CY8C20234-12LKXIT?
PSoC Designer™ v5.4 or later is mandatory - a free Windows-based IDE that provides drag-and-drop CapSense user module configuration, C-code generation, ISSP programming, and real-time tuning via USB-I²C bridge (e.g., CY3280-20x34 kit). No third-party toolchain is supported.
CY8C20234-12LKXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN
- 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:
- 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:
CY8C20234-12LKXIT FAQ
1.How can I place an order for CY8C20234-12LKXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20234-12LKXIT 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 CY8C20234-12LKXIT reliable?
The price and inventory of CY8C20234-12LKXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20234-12LKXIT is usually 5 days.
3.What payment methods are accepted for CY8C20234-12LKXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20234-12LKXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20234-12LKXIT?
CY8C20234-12LKXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20234-12LKXIT 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 CY8C20234-12LKXIT?
For technical support, including CY8C20234-12LKXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20234-12LKXIT requirements.
6.How does Aetrix verify that CY8C20234-12LKXIT is sourced from the original manufacturer or authorized distributors?
All CY8C20234-12LKXIT 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 CY8C20234-12LKXIT meets industry standards.
7.What is the process for return or replacement of CY8C20234-12LKXIT?
All CY8C20234-12LKXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20234-12LKXIT, 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 CY8C20234-12LKXIT part is unused and in its original packaging.
Return procedure for CY8C20234-12LKXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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