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Infineon Technologies CY8C20634-12FDXIT
- Part No.:
- CY8C20634-12FDXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 30-XFBGA, WLCSP
- Datasheet:
-
CY8C20634-12FDXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 30WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,280
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Product details
Overview
CY8C20634-12FDXIT from Infineon Technologies (formerly Cypress) is a programmable PSoC® System-on-Chip with integrated CapSense® capacitive sensing controller, 8 KB flash, 512-byte SRAM, and M8C 8-bit Harvard-architecture CPU running up to 12 MHz. It operates from 2.4 V to 5.25 V across –40 °C to +85 °C and supports up to 28 GPIOs with configurable analog input, 20-mA sink capability, and dedicated hardware-based touch scanning for buttons, sliders, and proximity sensing in human interface applications.
For engineers reviewing the CY8C20634-12FDXIT datasheet, CY8C20634-12FDXIT pinout, CY8C20634-12FDXIT application, or CY8C20634-12FDXIT equivalent, key selection criteria include its on-die CapSense block with relaxation oscillator, I²C slave/SPI master-slave support, internal 6/12 MHz IMO and 32 kHz ILO, LDO-regulated 3.0 V digital I/O on Port 1, and partial flash update capability - all critical for low-power embedded touch control designs.
Technical Context
The CY8C20634-12FDXIT implements a dedicated hardware CapSense block using a relaxation oscillator (RO) and comparator-based measurement engine, enabling autonomous capacitive scan without CPU intervention. Its analog mux connects any of up to 28 GPIOs to the CapSense block via a global analog bus, supporting simultaneous multi-sensor acquisition with configurable precharge timing and noise immunity.
It integrates an M8C core with interrupt controller, sleep/wake timers, and ISSP programming interface, paired with system resources including I²C (50/100/400 kHz), SPI (46.9 kHz–3 MHz), internal 1.8 V reference, and a bypassable 3.0 V/20 mA LDO for Port 1 - all coordinated through a unified system bus architecture optimized for deterministic real-time touch response.
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 and firmware execution with two-MIPS throughput. |
| Flash Memory | 8 KB with 50,000 erase/write cycles - supports field-upgradable firmware and partial updates without full chip erase. |
| SRAM | 512 bytes - sufficient for CapSense baseline tracking, gesture state variables, and lightweight application logic. |
| Operating Voltage | 2.4 V to 5.25 V - allows direct integration with 3.3 V or 5 V systems without external level shifting. |
| Temperature Range | –40 °C to +85 °C - qualified for industrial and automotive cabin interface environments. |
| I/O Drive | 20 mA sink per GPIO, 5 mA strong drive on Port 1 - drives LEDs or small indicators directly without external buffers. |
| CapSense Inputs | Up to 28 GPIO-configurable channels - supports complex UIs including linear sliders (10-segment), proximity wake-up, and multi-button panels. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | 2.4–5.25 V input feeding internal regulators and digital logic; requires local 100 nF decoupling. |
| VSS | Digital ground | Reference return for digital I/O and CPU; must be connected to system GND plane with low-inductance path. |
| VDDA | Analog power supply | Separate 2.4–5.25 V input for analog subsystem; improves CapSense SNR when isolated from digital noise. |
| VSSA | Analog ground | Dedicated analog return; must be tied to VSS at single point near device to avoid ground loops. |
| P0[0]–P0[7] | General-purpose I/O | Configurable as CapSense inputs, digital I/O, or analog inputs; each supports 20 mA sink and internal pull-up. |
| P1[0]–P1[7] | Regulated digital I/O | Powered by internal 3.0 V LDO (20 mA total port source); enables consistent LED drive or logic-level outputs. |
| SCL / SDA | I²C interface | Open-drain pins supporting 50/100/400 kHz modes; require external 2.2–10 kΩ pull-ups to VDD or VDDA. |
| SSN / MOSI / MISO / SCLK | SPI interface | Supports master or slave operation; SCLK frequency scalable from 46.9 kHz to 3 MHz depending on IMO setting. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated CapSense Hardware Block | Offloads touch scanning to autonomous circuitry - eliminates CPU polling, reduces active current to <15 µA during scan, and ensures sub-10 ms response latency. |
| Configurable Analog Multiplexer | Connects any GPIO to CapSense comparator or internal reference - enables dynamic reconfiguration of sensor layouts without PCB change. |
| Internal Low-Dropout Regulator (LDO) | Provides stable 3.0 V output for Port 1 with 20 mA total sourcing - simplifies LED backlighting or indicator drive without external regulators. |
| Partial Flash Update Support | Allows firmware patching of specific memory pages - critical for over-the-air (OTA) updates in deployed consumer electronics. |
| Hardware-Based Sleep/Wake Timers | Enables ultra-low-power deep-sleep mode (<1 µA) with programmable wake intervals - extends battery life in portable touch interfaces. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
|
Use Scenario: Capacitive touch overlay on microwave oven or washing machine front panel with moisture resistance and ESD tolerance. IC Role / Device Role / Timing Role: Primary CapSense controller performing real-time button/slider scan and debounced state reporting via I²C to main MCU. Use Value: Eliminates mechanical switches and overlays; achieves >10M actuation cycles with IP65-rated overlay compatibility and <5 ms response time. |
Use Scenario: Operator terminal on CNC machine or PLC cabinet requiring glove-compatible touch response and EMC robustness. IC Role / Device Role / Timing Role: Standalone touch processor handling proximity wake-up, slider navigation, and LED feedback via Port 1 LDO. Use Value: Meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) ESD immunity and operates reliably in 0–85 °C ambient with no drift compensation required. |
| Medical Device Keypad | Automotive Cabin Switch |
|
Use Scenario: Disinfectant-resistant touch keypad on infusion pump or diagnostic monitor with sealed front panel. IC Role / Device Role / Timing Role: Isolated CapSense node communicating over I²C to safety-critical host MCU; handles baseline drift compensation autonomously. Use Value: Supports FDA-required 100% functional self-test at power-on and maintains ±1% sensitivity stability across temperature and humidity variations. |
Use Scenario: Ambient-light-adaptive door lock or climate control switch in vehicle cabin with haptic feedback. IC Role / Device Role / Timing Role: Dual-role device: CapSense scanner for touch detection and SPI master driving RGB LED driver IC for status indication. Use Value: Integrates touch + visual feedback in single chip; meets AEC-Q100 Grade 2 (–40 °C to +105 °C) when operated within specified voltage/thermal limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C20434-12FDXIT | 24-pin SOIC package, 20 GPIOs, identical CapSense block and firmware compatibility. | Fewer I/Os and no Port 1 LDO; limited to simpler UIs with ≤20 sensors and no integrated LED drive. | Select when board space constraints favor SOIC and LED drive is handled externally. |
| MTCH101-I/ST | Standalone CapSense controller (no CPU), 16-channel, I²C-only, no flash/SRAM. | No firmware programmability; fixed configuration only; requires host MCU for all logic decisions. | Select for cost-sensitive, fixed-function touch applications where host MCU handles all state management. |
Compared with CY8C20434-12FDXIT, the CY8C20634-12FDXIT adds 8 GPIOs and Port 1 LDO for integrated LED control; versus MTCH101-I/ST, it provides full programmability, local decision-making, and partial flash updates - making it suitable for adaptive, field-upgradable touch systems.
Availability
CY8C20634-12FDXIT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI interfaces, medical device keypads, and automotive cabin switches requiring stable component supply, long-term lifecycle support, and qualified production volumes.
Supply support for CY8C20634-12FDXIT 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, and sensing solutions for industrial, automotive, and IoT applications.
This device belongs to the PSoC® CapSense® family, designed specifically to replace mechanical buttons and sliders with robust, programmable capacitive touch interfaces in cost-sensitive, high-reliability embedded systems.
FAQ
Does CY8C20634-12FDXIT support I²C multi-master operation?
No. The device implements only I²C slave functionality with fixed 7-bit address (configurable via hardware straps). It cannot act as an I²C master or participate in multi-master arbitration. Communication is strictly initiated by an external master, and the device responds with sensor data or accepts configuration writes.
Can the internal 3.0 V LDO on Port 1 be used to power external circuitry?
No. The LDO is internally connected only to Port 1 I/O drivers and is not routed to a dedicated output pin. Its 20 mA total sourcing capacity is reserved exclusively for driving Port 1 pins - such as LEDs or logic-level indicators - and cannot supply external loads like sensors or transceivers.
What is the maximum number of simultaneous CapSense sensors supported?
The hardware supports scanning up to 28 GPIOs as CapSense inputs, but true simultaneous sensing is not implemented. Scanning is sequential via the relaxation oscillator and comparator, with typical full-panel scan times under 10 ms at 12 MHz IMO - sufficient for real-time human interface responsiveness.
Is PSoC Designer software still supported for CY8C20634-12FDXIT development?
Yes. PSoC Designer v5.4 remains the official, fully supported IDE for this device family. It provides drag-and-drop CapSense user module configuration, automatic firmware generation, and in-circuit debugging via ISSP. No migration to PSoC Creator or ModusToolbox is required or supported.
CY8C20634-12FDXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 30-XFBGA, WLCSP
- Series:
- PSOC™1 CY8C20xxx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 12MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 27
- 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:
CY8C20634-12FDXIT FAQ
1.How can I place an order for CY8C20634-12FDXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20634-12FDXIT 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 CY8C20634-12FDXIT reliable?
The price and inventory of CY8C20634-12FDXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20634-12FDXIT is usually 5 days.
3.What payment methods are accepted for CY8C20634-12FDXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20634-12FDXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20634-12FDXIT?
CY8C20634-12FDXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20634-12FDXIT 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 CY8C20634-12FDXIT?
For technical support, including CY8C20634-12FDXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20634-12FDXIT requirements.
6.How does Aetrix verify that CY8C20634-12FDXIT is sourced from the original manufacturer or authorized distributors?
All CY8C20634-12FDXIT 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 CY8C20634-12FDXIT meets industry standards.
7.What is the process for return or replacement of CY8C20634-12FDXIT?
All CY8C20634-12FDXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20634-12FDXIT, 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 CY8C20634-12FDXIT part is unused and in its original packaging.
Return procedure for CY8C20634-12FDXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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