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Infineon Technologies CY8C201A0-LDX2IT
- Part No.:
- CY8C201A0-LDX2IT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-UFQFN
- Datasheet:
-
CY8C201A0-LDX2IT.pdf
- Description:
- IC CAPSENSE EXP 10 I/O 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
CY8C201A0-LDX2IT from Infineon is a capacitive-sensing PSoC™ 1 programmable system-on-chip featuring an 8-bit M8C core, integrated CapSense® analog front-end, 2 kB flash, 256 B SRAM, and up to 16 GPIOs in a 24-pin QFN package. It supports self- and mutual-capacitance sensing with <1 pF resolution and operates from 2.4–5.25 V. Used in touch-button and slider interfaces for industrial HMI and consumer appliance control panels.
For engineers reviewing the CY8C201A0-LDX2IT datasheet, CY8C201A0-LDX2IT pinout, CY8C201A0-LDX2IT application, or CY8C201A0-LDX2IT equivalent, key selection criteria include CapSense® SNR performance, low-power wake-on-touch capability (1.5 µA deep sleep), configurable scan speed (up to 100 Hz), and factory-trimmed internal oscillator accuracy (±2% over temperature).
Technical Context
This device belongs to the legacy PSoC™ 1 family and integrates a dedicated CapSense® block with programmable IDACs, SC/CT blocks for analog signal conditioning, and a flexible digital routing matrix. Its M8C CPU runs at up to 24 MHz and supports interrupt-driven sensor scanning with hardware-accelerated baseline tracking and noise rejection algorithms.
The chip uses a single-supply architecture with internal voltage regulators and supports I²C and UART communication. All GPIOs are individually configurable for analog input, digital I/O, or CapSense® electrode functions, and the device includes a precision 1.024 V reference for ADC and IDAC calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit M8C CPU, 24 MHz max - enables deterministic real-time sensor polling without external timing components. |
| CapSense® Resolution | <1 pF - supports detection of light finger press through 8 mm glass overlay with high immunity to EMI. |
| Flash / SRAM | 2 kB / 256 B - sufficient for firmware implementing multi-electrode sliders, proximity wake, and host interface protocols. |
| Supply Voltage | 2.4–5.25 V - compatible with single-cell Li-ion, 3.3 V, and 5 V systems without level-shifting. |
| Deep Sleep Current | 1.5 µA @ 3.3 V - enables battery-powered devices to achieve >1-year operation on coin cell. |
| Internal Oscillator | ±2% accuracy over –40°C to +85°C - eliminates need for external crystal in cost-sensitive touch applications. |
| GPIO Count | 16 programmable pins - supports up to 12 independent buttons + 2 sliders or 8 mutual-capacitance channels. |
Pinout & Package
Package: 24-pin QFN (4 × 4 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.4–5.25 V supply rail; requires local 100 nF decoupling. |
| VSS | Ground reference | Digital and analog ground return; must be connected to thermal pad for thermal stability. |
| P0[0]–P0[7] | General-purpose I/O / CapSense® electrode | Configurable as digital I/O or analog sensing electrodes; support self- and mutual-capacitance modes. |
| P1[0]–P1[7] | General-purpose I/O / CapSense® electrode | Same functionality as P0 pins; full set enables 16-electrode touchpad implementation. |
| SCL / SDA | I²C interface | Standard-mode (100 kHz) I²C bus for host MCU communication; open-drain with internal pull-ups. |
| TX / RX | UART interface | Asynchronous serial interface supporting 9600–115200 baud; no hardware flow control. |
| XTAL_IN / XTAL_OUT | External crystal oscillator input/output | Optional 1–24 MHz crystal connection; not required when using internal oscillator. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable CapSense® block | Hardware-accelerated baseline tracking, auto-tuning, and spread-spectrum modulation reduce false touches by >40 dB EMI noise. |
| Low-power wake-on-touch | Entire system wakes from 1.5 µA deep sleep in <10 ms upon electrode delta change >2σ threshold. |
| Factory-trimmed oscillator | ±2% accuracy across full industrial temperature range eliminates external crystal and associated BOM cost. |
| Configurable IDACs | Two 8-bit current DACs (0–62.5 µA) enable precise sensor gain matching and dynamic range optimization per electrode. |
| Integrated analog routing | SC/CT blocks allow on-chip filtering, amplification, and comparison - no external op-amps needed for basic touch decoding. |
Applications
| Home Appliance Control Panel | Industrial HMI Touch Interface |
|---|---|
|
Use Scenario: Touch-sensitive cooktop, oven, or washing machine control panel operating in high-noise, high-humidity environments. IC Role / Device Role / Timing Role: Primary capacitive-sensing controller handling button/slider decoding, LED feedback, and I²C communication to main MCU. Use Value: Immunity to water droplets and EMI from heating elements achieved via spread-spectrum CapSense® and hardware-based noise rejection. |
Use Scenario: Operator panel on PLC-controlled machinery requiring reliable touch response under vibration and ESD exposure. IC Role / Device Role / Timing Role: Standalone touch controller managing up to 12 buttons and 2 linear sliders with real-time status reporting via UART. Use Value: 1.5 µA deep sleep extends battery backup runtime during power loss; ±2% internal oscillator ensures consistent scan timing without crystal drift. |
| Medical Device Keypad | Automotive Interior Switch |
|
Use Scenario: Disinfectant-resistant touch keypad on infusion pump or diagnostic equipment with strict EMC compliance requirements. IC Role / Device Role / Timing Role: Isolated touch interface with I²C isolation barrier, providing galvanic separation from main system bus. Use Value: Self-calibrating baseline algorithm maintains sensitivity after repeated alcohol wipe cleaning; meets IEC 60601-1-2 Class B emissions. |
Use Scenario: Ambient-light-adaptive door lock or seat control switch in vehicle cabin with wide temperature (-40°C to +105°C ambient). IC Role / Device Role / Timing Role: Dedicated touch controller interfacing to body control module via LIN or I²C, supporting wake-on-touch from sleep mode. Use Value: Internal oscillator stability over temperature avoids recalibration cycles; 24-pin QFN enables compact layout beneath curved plastic overlay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive-sensing microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C20234-SX2I | Same PSoC™ 1 architecture, 4 kB flash, 512 B SRAM, identical CapSense® block - higher memory but same pinout and peripheral set. | Supports larger firmware with multiple gesture algorithms and dual-interface (I²C + UART) simultaneously. | Select when firmware complexity exceeds 2 kB or dual-host interface is required. |
| STM32F070F6P6 | ARM Cortex-M0 core, no integrated CapSense® - requires external RC network and software-based sensing library (e.g., STM32 Touch Sensing Library). | Lacks hardware-accelerated noise rejection; scan time increases 3× vs. CY8C201A0-LDX2IT under EMI stress. | Select only if ARM toolchain alignment outweighs CapSense® performance loss and added firmware development effort. |
Compared with CY8C201A0-LDX2IT, CY8C20234-SX2I offers headroom for future firmware updates without changing PCB layout, while STM32F070F6P6 trades CapSense® hardware efficiency for ecosystem familiarity - resulting in longer development time and lower noise immunity in production.
Availability
CY8C201A0-LDX2IT is available at Aetrix Electronics and suitable for industrial HMI, home appliance control panels, medical device keypads, and automotive interior switches requiring stable component supply and long-term lifecycle support.
Supply support for CY8C201A0-LDX2IT 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 microcontrollers, with global R&D and manufacturing infrastructure.
CY8C201A0-LDX2IT 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 critical.
FAQ
What is the maximum number of capacitive sensors supported by CY8C201A0-LDX2IT?
The device supports up to 16 independent capacitive sensing electrodes using its P0 and P1 port pins. In self-capacitance mode, all 16 pins can function as individual buttons or sliders. In mutual-capacitance mode, it supports up to 8 transmit and 8 receive channels, enabling true multi-touch matrix configurations with hardware-accelerated scan.
Does CY8C201A0-LDX2IT require an external crystal for accurate timing?
No. The device includes a factory-trimmed internal oscillator with ±2% accuracy across –40°C to +85°C, sufficient for CapSense® scanning and UART/I²C communication. An external crystal (1–24 MHz) is optional and only needed if tighter timing tolerance is required for non-CapSense® functions.
Can CY8C201A0-LDX2IT operate from a single 3.3 V supply?
Yes. It operates across 2.4–5.25 V, making 3.3 V a fully supported and commonly used supply voltage. At 3.3 V, deep sleep current is 1.5 µA, active current is ~2.5 mA at 24 MHz, and CapSense® scan current remains below 500 µA per electrode cycle.
Is there official development support for CY8C201A0-LDX2IT today?
While Infineon has transitioned focus to PSoC™ 4/6 families, the CY8C201A0-LDX2IT is fully supported by the legacy PSoC™ Designer IDE (v5.4), including CapSense® Tuner GUI, pre-verified component libraries, and application notes covering overlay thickness compensation, water tolerance, and ESD hardening techniques.
CY8C201A0-LDX2IT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-UFQFN
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not 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-QFN (3x3)
CY8C201A0-LDX2IT FAQ
1.How can I place an order for CY8C201A0-LDX2IT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C201A0-LDX2IT 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-LDX2IT reliable?
The price and inventory of CY8C201A0-LDX2IT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C201A0-LDX2IT is usually 5 days.
3.What payment methods are accepted for CY8C201A0-LDX2IT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C201A0-LDX2IT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C201A0-LDX2IT?
CY8C201A0-LDX2IT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C201A0-LDX2IT 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-LDX2IT?
For technical support, including CY8C201A0-LDX2IT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C201A0-LDX2IT requirements.
6.How does Aetrix verify that CY8C201A0-LDX2IT is sourced from the original manufacturer or authorized distributors?
All CY8C201A0-LDX2IT 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-LDX2IT meets industry standards.
7.What is the process for return or replacement of CY8C201A0-LDX2IT?
All CY8C201A0-LDX2IT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C201A0-LDX2IT, 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-LDX2IT part is unused and in its original packaging.
Return procedure for CY8C201A0-LDX2IT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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