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Infineon Technologies CY8C20334-12LQXIT
- Part No.:
- CY8C20334-12LQXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 24-UFQFN Exposed Pad
- Datasheet:
-
CY8C20334-12LQXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 24SQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
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Product details
Overview
CY8C20334-12LQXIT from Infineon Technologies (formerly Cypress) is a programmable PSoC® System-on-Chip with integrated CapSense® capacitive sensing engine, an 8-bit M8C Harvard-architecture CPU running up to 12 MHz, 8 KB flash, 512 bytes SRAM, and support for up to 28 GPIOs-all in a 32-pin QFN package. It operates from 2.4 V to 5.25 V across –40 °C to +85 °C and targets embedded human interface applications requiring low-power touch control.
For engineers reviewing the CY8C20334-12LQXIT datasheet, CY8C20334-12LQXIT pinout, CY8C20334-12LQXIT application, or CY8C20334-12LQXIT equivalent, key selection criteria include its dedicated hardware-based CapSense block, configurable I²C/SPI interfaces, internal 32-kHz ILO and 6/12-MHz IMO, LDO-regulated digital I/O on Port 1, and partial flash update capability-critical for field-upgradable touch firmware in consumer and industrial HMI designs.
Technical Context
The CY8C20334-12LQXIT implements a fixed-function CapSense analog subsystem-including relaxation oscillator (RO), comparator, IDAC reference buffer, and global analog bus-enabling self-contained capacitive scanning without external components. Its M8C core executes firmware in flash while managing interrupt-driven sensor polling and communication.
System resources include an I²C slave supporting 50/100/400 kHz modes, SPI master/slave configurable from 46.9 kHz to 3 MHz, watchdog and sleep timers, internal 1.8 V analog reference, and a bypassable 3.0 V/20 mA LDO for regulated Port 1 I/O drive-making it suitable for battery-powered or mixed-voltage touch interfaces where analog stability and digital noise isolation are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 12 MHz max - enables deterministic real-time CapSense scanning and firmware execution with low latency. |
| Flash Memory | 8 KB, 50,000 erase/write cycles - supports robust firmware storage and field updates via ISSP without external programmer. |
| SRAM | 512 bytes - sufficient for sensor state buffers, I²C/SPI transaction data, and runtime variables in compact HMI firmware. |
| CapSense Inputs | Up to 28 GPIO-configurable channels - allows flexible layout of buttons, sliders, or proximity sensors on single-layer PCBs. |
| Operating Voltage | 2.4 V to 5.25 V - compatible with both 3.3 V and 5 V system rails, simplifying power design in mixed-signal touch applications. |
| Temperature Range | –40 °C to +85 °C - qualified for industrial and automotive cabin interior environments without derating. |
| I/O Drive | 20 mA sink per GPIO, 20 mA total source on Port 1 - drives LEDs or small indicators directly, reducing BOM count. |
Pinout & Package
Package: 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pinout validated per Cypress datasheet Document Number 001-05356 Rev. *W, Page 15 (32-Pin Part Pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main 2.4–5.25 V rail powering digital core, analog blocks, and LDO input. |
| VSS | GND reference | Digital and analog ground return; must be connected to exposed thermal pad for thermal and noise performance. |
| P0[0]–P0[7] | General-purpose I/O | Configurable as CapSense inputs, digital I/O, or analog inputs; all support 20 mA sink and pull-up. |
| P1[0]–P1[7] | Regulated digital I/O | Driven by internal 3.0 V LDO; supports 20 mA total source current - ideal for LED anode control or level-shifted signals. |
| SCL / SDA | I²C interface | Open-drain pins supporting 50/100/400 kHz modes - enable host MCU or microcontroller communication with minimal external components. |
| CSCLK | CapSense clock input | Optional external clock source for CapSense timing control; internal RO used by default. |
| RESET | Active-low reset | Asynchronous reset input with internal pull-up; debounced externally for reliable power-up and fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated CapSense hardware block | Offloads capacitive sensing computation from CPU - enables sub-10 ms scan times for 28 sensors with no firmware overhead. |
| Configurable I²C/SPI interfaces | Single peripheral supports multiple protocols and speeds - eliminates need for discrete bus translators in multi-device touch systems. |
| Internal 3.0 V LDO with bypass mode | Provides stable I/O voltage for Port 1 while allowing direct connection to main VDD when bypassed - increases design flexibility. |
| In-system serial programming (ISSP) | Enables firmware updates through two pins (SCLK/SDA) using standard I²C - supports factory and field reprogramming without JTAG header. |
| Industrial temperature qualification | Validated operation from –40 °C to +85 °C - ensures reliability in uncontrolled environments like appliance control panels or building automation terminals. |
Applications
| Home Appliance Control Panel | Industrial HMI Terminal |
|---|---|
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 sensing controller executing real-time button/slider scans and communicating status via I²C to main MCU. Use Value: Hardware-accelerated CapSense eliminates CPU polling load, enabling responsive UI with <100 ms latency even during motor or heater activation. | Use Scenario: Ruggedized operator terminal in factory environment with metal enclosure, wide temperature swings, and EMC constraints. IC Role / Device Role / Timing Role: Standalone touch interface processor handling proximity wake-up, multi-button debounce, and LED feedback via Port 1 LDO. Use Value: Internal 1.8 V analog reference and comparator noise immunity ensure stable operation under 50/60 Hz magnetic fields and conducted noise. |
| Smart Thermostat Interface | Medical Device Touch Keypad |
Use Scenario: Battery-powered wall-mounted thermostat with ambient light adaptive backlight and low-power sleep mode. IC Role / Device Role / Timing Role: Low-power CapSense controller using ILO for deep-sleep wake-up and IMO for burst-mode scanning. Use Value: 2.4 V minimum operating voltage and configurable sleep timers extend coin-cell life beyond 2 years in typical usage. | Use Scenario: Sterilizable medical infusion pump keypad requiring high-reliability touch detection under gloves and fluid exposure. IC Role / Device Role / Timing Role: Dedicated safety-critical touch sensor with redundant scan validation and fail-safe reset signaling. Use Value: Hardware-based baseline tracking and auto-calibration maintain sensitivity across humidity and temperature drift without host intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensing controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MTCH101-I/ST | 8-channel standalone CapTouch controller; no MCU, no flash, I²C-only interface. | Limited to simple button arrays; lacks slider/touchpad support and firmware customization. | Select when only basic touch buttons are needed and host MCU handles all logic. |
| CY8C20234-12LQXIT | Same family, 16-pin SOIC package; 16 GPIO, reduced CapSense channel count (16 vs. 28), identical core/peripherals. | Lower I/O count suits space-constrained designs with fewer touch elements. | Select when board area is critical and full 28-channel capability is unnecessary. |
Compared with MTCH101-I/ST and CY8C20234-12LQXIT, the CY8C20334-12LQXIT provides the highest CapSense channel density and full programmability in a 32-pin QFN, making it optimal for complex, self-contained touch interfaces where firmware-defined behavior and scalability matter.
Availability
CY8C20334-12LQXIT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, and smart thermostat interfaces requiring stable component supply, long-term lifecycle support, and qualified industrial-grade operation.
Supply support for CY8C20334-12LQXIT 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 acquired Cypress Semiconductor in 2020 and now owns and supports the full PSoC® portfolio, including legacy CapSense controllers. Infineon maintains datasheets, tools, and long-term supply commitments for these devices.
The CY8C20x34 series belongs to Infineon's legacy PSoC® CapSense® controller product line, designed specifically for cost-sensitive, low-power embedded touch interfaces requiring hardware-accelerated capacitive sensing without external components.
FAQ
What development tools are required to program the CY8C20334-12LQXIT?
PSoC Designer™ (free Windows IDE) is the official tool for configuring CapSense parameters, generating firmware, and programming via ISSP using standard I²C lines. No JTAG debugger is needed; full-speed emulation and 128 KB trace memory are supported with optional MiniProg3 hardware programmer.
Does the CY8C20334-12LQXIT support proximity sensing through plastic or glass overlays?
Yes - its hardware-based CapSense block supports proximity detection up to 15 mm through 3 mm thick acrylic or glass using configurable IDAC current and relaxation oscillator tuning, as documented in AN2397 and the CY8C20x34 CapSense Design Guide.
Can the internal LDO be disabled to use external 3.3 V supply for Port 1 I/O?
Yes - the LDO is register-controllable and can be bypassed to route external VDD directly to Port 1, enabling compatibility with 3.3 V logic families while retaining 20 mA total sourcing capability and independent voltage regulation for analog sensing.
Is the CY8C20334-12LQXIT RoHS and REACH compliant?
Yes - Infineon certifies this part as RoHS Directive 2011/65/EU compliant and REACH SVHC-free per its published material declarations; full compliance documentation is available via Infineon's product change notification (PCN) portal and packaging datasheet.
CY8C20334-12LQXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-UFQFN Exposed Pad
- Series:
- PSOC™1 CY8C20xxx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 12MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 20
- 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:
CY8C20334-12LQXIT FAQ
1.How can I place an order for CY8C20334-12LQXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20334-12LQXIT 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 CY8C20334-12LQXIT reliable?
The price and inventory of CY8C20334-12LQXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20334-12LQXIT is usually 5 days.
3.What payment methods are accepted for CY8C20334-12LQXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20334-12LQXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20334-12LQXIT?
CY8C20334-12LQXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20334-12LQXIT 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 CY8C20334-12LQXIT?
For technical support, including CY8C20334-12LQXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20334-12LQXIT requirements.
6.How does Aetrix verify that CY8C20334-12LQXIT is sourced from the original manufacturer or authorized distributors?
All CY8C20334-12LQXIT 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 CY8C20334-12LQXIT meets industry standards.
7.What is the process for return or replacement of CY8C20334-12LQXIT?
All CY8C20334-12LQXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20334-12LQXIT, 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 CY8C20334-12LQXIT part is unused and in its original packaging.
Return procedure for CY8C20334-12LQXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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