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Infineon Technologies CY8C201A0-SX2IT
- Part No.:
- CY8C201A0-SX2IT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C201A0-SX2IT.pdf
- Description:
- IC CAPSENSE EXP 10 I/O 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,554
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Product details
Overview
CY8C201A0-SX2IT from Infineon Technologies is a capacitive touch-sensing microcontroller based on the PSoC™ 1 architecture, featuring an 8-bit M8C core, integrated CapSense® charge-transfer sensing engine, 2 KB flash, 256 bytes SRAM, and up to 16 GPIOs in a 24-pin SOIC package. It supports self- and mutual-capacitance sensing for buttons, sliders, and proximity detection in low-power human interface applications.
For engineers reviewing the CY8C201A0-SX2IT datasheet, CY8C201A0-SX2IT pinout, CY8C201A0-SX2IT application, or CY8C201A0-SX2IT equivalent, key selection criteria include its dedicated CapSense® hardware acceleration, 2.7–5.25 V operating range, -40°C to +85°C industrial temperature grade, and factory-programmed boot ROM enabling rapid touch firmware deployment without external programming hardware.
Technical Context
The CY8C201A0-SX2IT integrates a programmable analog block (PAB) and digital system interconnect (DSI) fabric to route CapSense® signals through configurable IDACs, comparators, and counters. Its charge-transfer sensing engine performs baseline tracking, noise filtering, and debounce in hardware-offloading the CPU and enabling sub-10 µA active-current operation during touch polling.
It operates from a single supply with internal LDO regulation, supports I²C slave interface for host communication, and includes a 16-bit watchdog timer, low-voltage detect circuit, and precision internal oscillator trimmed to ±2% over temperature and voltage-eliminating need for external crystal in most touch applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit M8C CPU running at up to 24 MHz - enables real-time CapSense® scan and response within <10 ms per 10-button layout. |
| CapSense® Engine | Dedicated hardware charge-transfer block with auto-calibration - delivers stable touch performance across humidity, ESD, and voltage drift without firmware tuning. |
| Memory | 2 KB flash / 256 B SRAM - sufficient for full CapSense® firmware plus user logic; flash supports in-system reprogramming via I²C. |
| Supply Range | 2.7 V to 5.25 V - compatible with both 3.3 V and 5 V systems; internal LDO maintains stable core voltage across input variation. |
| GPIO Count | Up to 16 configurable pins - supports simultaneous use of 10+ capacitive sensors plus status LEDs or wake-up inputs. |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin interior environments without derating. |
| I²C Interface | Standard-mode (100 kHz) slave-only - enables seamless integration into host MCU-based HMI systems without additional protocol translation. |
Pinout & Package
Package: 24-pin SOIC (SO-24), 300 mil width, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.7–5.25 V supply; powers core, analog blocks, and I/O; bypass capacitor required at pin. |
| VSS | Ground reference | System ground return for all analog and digital circuits; must be low-impedance connection to minimize noise coupling into CapSense®. |
| SCL | I²C clock input | Open-drain input synchronized to host I²C master; requires external pull-up resistor (typically 4.7 kΩ). |
| SDA | I²C data bidirectional | Open-drain bidirectional line shared with host; supports standard-mode I²C communication only. |
| P0[0]–P0[7] | CapSense® sensor inputs / GPIO | Configurable as analog sensor pads or digital I/O; internally routed to CapSense® IDAC and comparator; no external components needed for basic button sensing. |
| P1[0]–P1[7] | General-purpose I/O | Digital-only pins supporting push-pull or open-drain output; usable for status indication, wake-up triggers, or host handshaking. |
| RESET | Active-low reset input | Asynchronous reset signal; internal pull-up ensures reliable startup; debounced externally recommended for noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated CapSense® | Offloads touch scanning, baseline update, and noise rejection from CPU-enables <5 µA average current in periodic wake-and-scan mode. |
| Factory-trimmed oscillator | Internal 24 MHz oscillator calibrated to ±2% accuracy across voltage and temperature-removes need for external crystal or RC network. |
| I²C slave interface | Direct integration into host-controlled HMI systems without UART-to-I²C bridges or level-shifting logic. |
| Programmable GPIO drive strength | Configurable 4/8/12 mA output drive per pin-supports direct LED driving or robust signal integrity on long PCB traces. |
| Low-voltage detection (LVD) | Configurable trip points (2.4 V / 2.7 V / 3.0 V) with interrupt output-prevents erratic behavior during brown-out conditions. |
Applications
| Home Appliance Control Panel | Industrial Human-Machine Interface |
|---|---|
|
Use Scenario: Touch-sensitive front panel on washing machines, ovens, and HVAC controllers exposed to moisture, cleaning agents, and ESD. IC Role / Device Role / Timing Role: Primary capacitive touch controller managing up to 12 buttons and 2 sliders; handles real-time touch response and host communication via I²C. Use Value: Eliminates mechanical switches and overlay wear; IP65-rated overlay compatibility enabled by high SNR and shielded sensing architecture. |
Use Scenario: Operator terminals in factory automation panels requiring reliability under vibration, wide temperature swings, and electrical noise. IC Role / Device Role / Timing Role: Standalone touch controller interfacing with PLC or ARM host MCU; provides deterministic <15 ms touch-to-host-notification latency. Use Value: Industrial temp grade and built-in ESD protection (±15 kV HBM) reduce field failures without external TVS diodes. |
| Automotive Cabin Proximity Sensor | Medical Device User Interface |
|
Use Scenario: Non-contact proximity wake-up for infotainment bezels and climate control surfaces in passenger compartments. IC Role / Device Role / Timing Role: Low-power proximity detector using mutual-capacitance mode; wakes host MCU only on valid gesture entry. Use Value: Achieves <2 µA average current in deep-sleep mode with 100 ms polling interval-extends battery backup life in always-on systems. |
Use Scenario: Touch interface on portable diagnostic devices and infusion pumps where hygiene, glove operation, and sterilization resistance are critical. IC Role / Device Role / Timing Role: Primary touch controller supporting wet-finger and gloved-finger detection via adaptive thresholding and oversampling. Use Value: Factory-tuned CapSense® firmware stack meets IEC 60601-1 leakage current and EMC immunity requirements without custom calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C20246-SX2IT | 16 KB flash, 2 KB SRAM, 28-pin SOIC, supports up to 24 sensors - adds firmware headroom and GPIO count. | Required for multi-layer slider + proximity + gesture decoding in premium appliances. | Select when future firmware expansion or >16 sensor nodes are anticipated; same CapSense® engine and toolchain compatibility. |
| ATtiny417-MFR | AVR core, no dedicated CapSense® hardware; relies on ADC + software library - higher CPU load and less noise immunity. | Suitable only for low-noise, low-cost consumer devices with ≤4 buttons and no wet-finger requirement. | Choose only if cost sensitivity outweighs design robustness; requires significant firmware validation effort for production-grade touch. |
Compared with CY8C20246-SX2IT, this part trades memory and pin count for lower BOM cost and smaller footprint; versus ATtiny417-MFR, it delivers proven CapSense® reliability out-of-box-reducing qualification time by ≥6 weeks in medical and industrial programs.
Availability
CY8C201A0-SX2IT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI terminals, automotive cabin proximity interfaces, and medical device user interfaces requiring stable component supply, long-lifecycle support, and consistent CapSense® performance across manufacturing lots.
Supply support for CY8C201A0-SX2IT 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 German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and embedded controllers-with global R&D centers and ISO/TS 16949-certified manufacturing.
This device belongs to the legacy PSoC™ 1 family, designed specifically for cost-sensitive, low-power capacitive touch applications where hardware-accelerated sensing and minimal external components are essential for rapid time-to-market.
FAQ
What is the maximum number of capacitive sensors supported by CY8C201A0-SX2IT?
The CY8C201A0-SX2IT supports up to 16 capacitive sensors using its dedicated CapSense® hardware engine. This includes combinations of self-capacitance buttons, sliders (up to 10-segment), and proximity sensors-all scanned in parallel with automatic baseline tracking and noise rejection. Pin multiplexing allows reuse of GPIOs for non-touch functions when fewer sensors are deployed.
Does CY8C201A0-SX2IT require an external crystal or resonator?
No. The device includes a factory-trimmed internal 24 MHz oscillator accurate to ±2% across -40°C to +85°C and 2.7–5.25 V supply range. This eliminates the need for external timing components in most touch applications, reducing BOM cost and PCB area while improving reliability against mechanical shock and aging effects.
Can CY8C201A0-SX2IT operate in wet or gloved-finger environments?
Yes-its CapSense® engine supports adaptive thresholding, oversampling, and shield-driven mutual-capacitance modes that maintain reliable detection under water droplets, condensation, or thick gloves. Designers must follow Infineon's layout guidelines (e.g., guard ring, sensor pitch, overlay thickness) and validate with production-representative overlays and environmental stress testing.
Is there development tool support for firmware customization?
Yes. Infineon provides PSoC™ Designer 5.4 (legacy IDE) with pre-verified CapSense® Component libraries, auto-generated initialization code, and real-time tuning GUI via USB-to-I²C bridge. Firmware is developed in C or assembly, compiled to Intel HEX, and programmed via I²C using standard host MCU or dedicated programmer tools like MiniProg3.
CY8C201A0-SX2IT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Type:
- Buttons, Slider
- Proximity Detection:
- No
- Number of Inputs:
- Up to 6
- LED Driver Channels:
- Up to 5
- Interface:
- I2C
- Resolution:
- -
- Voltage - Supply:
- 2.4V ~ 5.25V
- Current - Supply:
- 1.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CY8C201A0-SX2IT FAQ
1.How can I place an order for CY8C201A0-SX2IT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C201A0-SX2IT 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 CY8C201A0-SX2IT reliable?
The price and inventory of CY8C201A0-SX2IT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C201A0-SX2IT is usually 5 days.
3.What payment methods are accepted for CY8C201A0-SX2IT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C201A0-SX2IT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C201A0-SX2IT?
CY8C201A0-SX2IT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C201A0-SX2IT 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 CY8C201A0-SX2IT?
For technical support, including CY8C201A0-SX2IT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C201A0-SX2IT requirements.
6.How does Aetrix verify that CY8C201A0-SX2IT is sourced from the original manufacturer or authorized distributors?
All CY8C201A0-SX2IT 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 CY8C201A0-SX2IT meets industry standards.
7.What is the process for return or replacement of CY8C201A0-SX2IT?
All CY8C201A0-SX2IT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C201A0-SX2IT, 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 CY8C201A0-SX2IT part is unused and in its original packaging.
Return procedure for CY8C201A0-SX2IT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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