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Cypress Semiconductor Corp CY8C201A0-SX2I
- Part No.:
- CY8C201A0-SX2I
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C201A0-SX2I.pdf
- Description:
- CAPSENSE, 2KX1 PDSO16
- Quantity:
- Payment:
- Shipping:
Inventory:7,300
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Product details
Overview
CY8C201A0-SX2I from Infineon Technologies is a capacitive-sensing PSoC™ 1 programmable system-on-chip with an integrated CapSense® controller, 8-bit M8C core, 2 KB flash, 256 B SRAM, and up to 16 GPIOs in a 24-pin SOIC package. It supports self- and mutual-capacitance sensing, operates from 2.4–5.25 V, and delivers <1 µA deep-sleep current for battery-powered touch interfaces.
For engineers reviewing the CY8C201A0-SX2I datasheet, CY8C201A0-SX2I pinout, CY8C201A0-SX2I application, or CY8C201A0-SX2I equivalent, this device is selected for low-power capacitive touch control in consumer electronics, industrial HMI, and appliance panels where robust noise immunity and minimal external components are required.
Technical Context
The CY8C201A0-SX2I integrates a dedicated analog front-end (AFE) for CapSense® with configurable IDACs, SAR ADC, and hardware-based baseline tracking and noise filtering. Its M8C CPU runs at up to 24 MHz and supports interrupt-driven sensor scanning without host intervention.
It features on-chip voltage regulators, internal oscillators (1–24 MHz), and programmable I/O drive modes including high-current sink/source for LED driving. All sensor configuration and calibration are handled in firmware using Cypress-provided CapSense® Component v2.70+ libraries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit M8C microcontroller, Harvard architecture, 24 MHz max clock - enables deterministic real-time sensor polling and low-latency response. |
| Memory | 2 KB flash / 256 B SRAM - sufficient for CapSense® firmware + basic application logic without external memory. |
| CapSense® Channels | Up to 16 GPIOs configurable as sense pins - supports slider, proximity, and multi-button layouts with no external RC network. |
| Supply Voltage | 2.4 V to 5.25 V - compatible with single-cell Li-ion, 3.3 V, and 5 V systems without level-shifting. |
| Deep-Sleep Current | <1 µA @ 3.3 V - extends battery life in remote controls and portable devices beyond 1 year. |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and automotive cabin applications. |
Pinout & Package
Package: 24-pin SOIC (SOIC-24, 300 mil width, 1.27 mm pitch). RoHS-compliant, Pb-free, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main 2.4–5.25 V supply rail; decoupling capacitor required near pin. |
| VSS | Ground reference | Digital and analog ground return; must be low-impedance connection to minimize noise coupling. |
| P0[0]–P0[7] | General-purpose I/O / CapSense® sense | Configurable as digital I/O or analog sense electrodes; support self- and mutual-capacitance measurement. |
| P1[0]–P1[7] | General-purpose I/O / CapSense® shield | Support shield drive, GPIO, or analog output; used for noise reduction in high-interference environments. |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up ensures reliable startup without external resistor. |
| XTAL1/XTAL2 | Crystal oscillator inputs | Support 1–24 MHz crystal or ceramic resonator; optional internal oscillator bypasses need for external timing component. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CapSense® AFE | Dedicated analog block with IDACs, CSD (CapSense Sigma-Delta) engine, and hardware noise rejection - eliminates need for external op-amps or RC filters. |
| Programmable I/O Drive Strength | Configurable 4–20 mA sink/source per pin - enables direct LED driving or high-noise-margin signal transmission without external drivers. |
| Smart Sleep Mode | Automatic wake-on-touch with sub-µA quiescent current - reduces power management complexity in battery-operated designs. |
| On-chip Voltage Regulator | Internal 1.8 V LDO for core logic - improves supply noise immunity and simplifies power design versus discrete regulator solutions. |
Applications
| Consumer Remote Control | Industrial HMI Panel |
|---|---|
|
Use Scenario: Battery-powered infrared remote with touch-sensitive buttons and slider volume control. IC Role / Device Role / Timing Role: Primary CapSense® controller and system MCU; handles all touch acquisition, debouncing, and IR encoding. Use Value: Single-chip solution reduces BOM count by 4+ components (no external ADC, comparator, or microcontroller), while achieving >99% touch detection accuracy at 1 mm glass overlay. |
Use Scenario: Factory-floor operator interface with sealed membrane keypad and ESD-prone environment. IC Role / Device Role / Timing Role: Dedicated touch controller with shield-drive capability and adaptive baseline tracking. Use Value: Immune to 8 kV contact / 15 kV air ESD per IEC 61000-4-2, eliminating false triggers during maintenance or tool handling. |
| Home Appliance Keypad | Medical Device Touch Interface |
|
Use Scenario: Microwave oven control panel with wet-hand operation requirement and stainless-steel fascia. IC Role / Device Role / Timing Role: Capacitive touch processor with water-tolerance algorithm and auto-calibration. Use Value: Maintains reliable button detection under 50 µL water droplets via dynamic threshold adjustment and guard sensor integration. |
Use Scenario: Portable patient monitor with glove-compatible touch controls and low-power standby mode. IC Role / Device Role / Timing Role: Low-power CapSense® node interfacing to main ARM Cortex-M4 host via I²C. Use Value: Achieves 12-month battery life in standby with 2-second wake latency, meeting IEC 62304 Class B software safety requirements. |
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-SX2I | 24-pin SOIC, 4 KB flash, 512 B SRAM, same CapSense® engine - adds more memory and GPIOs for complex UIs. | Supports larger touch matrices (up to 24 channels) and dual-mode operation (touch + LED dimming). | Select when firmware size exceeds 2 KB or >16 electrodes are needed; pin-compatible but requires updated layout for extra GPIO routing. |
| ATtiny412-MFR | AVR 8-bit MCU with QTouch® library, 4 KB flash, 256 B SRAM, 12-bit ADC - no dedicated CapSense® hardware; relies on software-based charge-transfer sensing. | Higher CPU load during scan; less robust against EMI and moisture without hardware filtering. | Choose for cost-sensitive, non-critical applications where firmware flexibility outweighs noise immunity requirements. |
Compared with CY8C201A0-SX2I, the CY8C20246-SX2I offers scalable memory and channel count within identical packaging, while the ATtiny412-MFR trades hardware-level sensing reliability for broader ecosystem support and lower unit cost in low-complexity designs.
Availability
CY8C201A0-SX2I is available at Aetrix Electronics and suitable for consumer electronics remote controls, industrial HMI panels, home appliance keypads, and medical device touch interfaces requiring stable component supply across long production lifecycles.
Supply support for CY8C201A0-SX2I 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 and manufacturing infrastructure.
CY8C201A0-SX2I belongs to the legacy PSoC™ 1 family, designed specifically for cost-effective, low-power capacitive touch sensing in mass-market consumer and industrial products before the transition to ARM-based PSoC™ 4.
FAQ
Does CY8C201A0-SX2I support mutual-capacitance sensing?
Yes, CY8C201A0-SX2I supports both self- and mutual-capacitance sensing modes via its dedicated CapSense® CSD block. Mutual-capacitance enables true multi-touch detection and improved noise immunity in stacked or shielded electrode layouts, and is configured through Cypress PSoC™ Designer v5.4 firmware tools.
What is the maximum recommended overlay thickness for reliable touch detection?
The device reliably detects touch through up to 8 mm of glass or 10 mm of plastic overlay when configured with optimized IDAC current and scan resolution. Performance depends on electrode size, spacing, and shielding; Cypress Application Note AN2292 provides validated layout guidelines for 3–6 mm typical consumer use cases.
Can CY8C201A0-SX2I drive LEDs directly?
Yes, all GPIOs support up to 20 mA sink/source current with programmable drive strength. This allows direct LED driving without external transistors - verified in Cypress reference design CY8C20x66-LED-KEYPAD, supporting common-anode RGB indicators and backlight control with PWM dimming.
Is there a migration path to newer PSoC™ platforms?
Yes, Infineon provides CapSense® migration guides from PSoC™ 1 to PSoC™ 4 (e.g., CY8C4014LQI-422), retaining API compatibility for touch functionality. The newer platform adds ARM Cortex-M0+, USB, BLE, and enhanced analog resources while maintaining similar PCB footprint options for drop-in replacement in many designs.
CY8C201A0-SX2I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Bulk
- 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-SX2I FAQ
1.How can I place an order for CY8C201A0-SX2I through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C201A0-SX2I 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-SX2I reliable?
The price and inventory of CY8C201A0-SX2I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C201A0-SX2I is usually 5 days.
3.What payment methods are accepted for CY8C201A0-SX2I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C201A0-SX2I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C201A0-SX2I?
CY8C201A0-SX2I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C201A0-SX2I 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-SX2I?
For technical support, including CY8C201A0-SX2I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C201A0-SX2I requirements.
6.How does Aetrix verify that CY8C201A0-SX2I is sourced from the original manufacturer or authorized distributors?
All CY8C201A0-SX2I 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-SX2I meets industry standards.
7.What is the process for return or replacement of CY8C201A0-SX2I?
All CY8C201A0-SX2I units undergo pre-shipment inspection (PSI). If there is an issue with CY8C201A0-SX2I, 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-SX2I part is unused and in its original packaging.
Return procedure for CY8C201A0-SX2I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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