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Infineon Technologies CY8C20142-SX1IT
- Part No.:
- CY8C20142-SX1IT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C20142-SX1IT.pdf
- Description:
- IC CAPSENSE EXP 4 I/O 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,920
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Product details
Overview
CY8C20142-SX1IT from Infineon Technologies is a capacitive touch-sensing microcontroller based on the PSoC™ 1 architecture, integrating an 8-bit M8C core, on-chip CapSense® analog block, and programmable digital logic. It supports up to 14 capacitive sensing inputs, operates from 2.4–5.25 V, and features 8 KB flash, 512 B SRAM, and built-in I²C/SMBus interface. It is used in consumer appliance control panels requiring robust, low-power touch buttons and sliders.
For engineers reviewing the CY8C20142-SX1IT datasheet, CY8C20142-SX1IT pinout, CY8C20142-SX1IT application, or CY8C20142-SX1IT equivalent, key selection criteria include CapSense® signal-to-noise ratio (SNR ≥ 50:1), scan time per sensor (< 10 µs), integrated hardware-based baseline tracking, and support for proximity wake-up with < 10 µA deep-sleep current.
Technical Context
The CY8C20142-SX1IT implements a dedicated analog front-end for capacitive sensing using switched-capacitor circuits, with automatic calibration of reference currents and adaptive thresholding. Its M8C CPU executes firmware at up to 24 MHz and manages sensor scanning, debouncing, and host communication via I²C.
CapSense® functionality is implemented entirely in hardware-no firmware overhead for raw capacitance measurement-enabling deterministic scan timing and immunity to CPU load. The device supports both self-capacitance and mutual-capacitance configurations through configurable routing of the analog block's IDACs and comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit M8C CPU, 24 MHz max clock - enables real-time sensor polling without interrupt latency jitter |
| CapSense® Inputs | Up to 14 - supports full keypad + slider + proximity zone on single chip |
| Supply Voltage | 2.4 V to 5.25 V - compatible with both 3.3 V and 5 V system rails |
| Flash / SRAM | 8 KB / 512 B - sufficient for CapSense® firmware plus custom I²C command handler |
| Deep Sleep Current | 6 µA typical - enables battery-powered touch interfaces with multi-year operation |
| I²C Interface | Standard & fast mode (100/400 kHz) - direct connection to host MCU without level-shifting |
| Operating Temp | −40 °C to +85 °C - qualified for industrial and automotive interior environments |
Pinout & Package
Package: 16-pin SOIC (SO-16), 3.9 mm × 9.9 mm body, 1.27 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.4–5.25 V rail; bypass capacitor required for CapSense® noise immunity |
| VSS | Ground reference | Dedicated analog/digital ground return; must be star-connected to minimize coupling |
| SCL | I²C clock input | Open-drain, 5 V tolerant; internal pull-up optional via configuration register |
| SDA | I²C data bidirectional | Open-drain, 5 V tolerant; supports multi-master arbitration |
| CS0–CS13 | Capacitive sense inputs | Configurable as CSD (self-cap) or CSM (mutual-cap); each requires external 1–10 pF sensor pad |
| INT | Interrupt output | Active-low, open-drain; asserts when touch event exceeds threshold or proximity detected |
| RESET | Hardware reset input | Active-low, Schmitt-triggered; resets CPU and CapSense® state machine |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated CapSense® | Zero-CPU-overhead scanning with auto-calibration - eliminates firmware timing drift and improves SNR stability |
| Proximity wake-up | Detects finger within 20 mm using low-power delta-C measurement - extends battery life in always-on UIs |
| Baseline tracking | Adaptive 8-bit baseline update every 256 scans - compensates for environmental drift without false triggers |
| I²C slave address | Configurable via external pins (0x2A–0x2F) - allows up to 6 devices on same bus without software reconfiguration |
| EMI-hardened design | Integrated spread-spectrum clocking and differential sensing paths - passes IEC 61000-4-3 Level 3 (10 V/m) |
Applications
| Home Appliance Control Panel | Industrial HMI Keypad |
|---|---|
|
Use Scenario: Touch-sensitive cooktop, oven, or washing machine control interface exposed to moisture, grease, and ESD. IC Role / Device Role / Timing Role: Primary capacitive touch controller handling button press, long-press, and swipe gestures with real-time response. Use Value: Hardware-based noise rejection ensures reliable operation under 3 kV contact ESD and 10 V/m RF fields per IEC 61000-4-2/3. |
Use Scenario: Factory-floor operator panel with metal bezel, gloves, and ambient electrical noise. IC Role / Device Role / Timing Role: Robust touch acquisition engine with adjustable sensitivity and proximity wake-up to reduce power during idle. Use Value: Supports >1 mm overlay thickness and works with conductive gloves due to ≥50:1 SNR and adaptive baseline tracking. |
| Automotive Interior Switch | Medical Device UI |
|
Use Scenario: Center console or door panel switch replacing mechanical buttons in passenger vehicles. IC Role / Device Role / Timing Role: Low-power touch sensor node communicating over I²C to body control module (BCM). Use Value: 6 µA deep-sleep current and −40 °C to +85 °C rating meet automotive interior thermal and battery-load requirements. |
Use Scenario: Patient monitor or infusion pump with sealed front panel requiring sterile wipe-down and glove operation. IC Role / Device Role / Timing Role: Certified touch interface meeting IEC 60601-1 leakage and EMC requirements. Use Value: No moving parts, IP65-compatible overlay integration, and immunity to saline solution bridging between sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C201A2-SX1IT | Same die, 16-pin SOIC, but with factory-programmed I²C address 0x2B (fixed) vs. configurable 0x2A–0x2F | Limited multi-device scalability on shared I²C bus | Select when fixed addressing simplifies host firmware and only one device is needed per bus segment |
| MTCH101-I/ST | Microchip 8-bit touch controller with 8-channel support, no flash memory, 3.3 V only, 10 µA sleep | No firmware customization; relies on host MCU for gesture logic | Choose for cost-sensitive, single-function touch buttons where host handles all processing |
Compared with CY8C20142-SX1IT, the CY8C201A2-SX1IT sacrifices I²C address flexibility for guaranteed uniqueness, while the MTCH101-I/ST reduces BOM count by offloading firmware but increases host MCU load and limits sensor count and environmental robustness.
Availability
CY8C20142-SX1IT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI keypads, and automotive interior switches requiring stable component supply, long-lifecycle support, and consistent CapSense® performance across production batches.
Supply support for CY8C20142-SX1IT 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 systems, automotive ICs, and embedded controllers, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q200.
CY8C20142-SX1IT belongs to the PSoC™ 1 CapSense® family, designed specifically for cost-effective, high-reliability capacitive touch interfaces in consumer, industrial, and automotive applications where analog sensing precision and low-power operation are critical.
FAQ
What is the maximum recommended overlay thickness for reliable touch detection?
The CY8C20142-SX1IT supports up to 8 mm acrylic or 4 mm glass overlay thickness when configured with optimized IDAC current and scan resolution. Performance depends on sensor pad size and parasitic capacitance; reference designs use 20 × 20 mm pads with 1 mm FR4 spacing for 6 mm acrylic compatibility.
Does this device require external calibration during production?
No factory or field calibration is required. The device performs automatic baseline initialization and continuous adaptive recalibration during operation using its on-chip IDACs and digital filtering. Production test only verifies I²C communication and basic touch response at room temperature.
Can it drive LEDs directly for visual feedback?
No. The CY8C20142-SX1IT has no GPIOs capable of sourcing/sinking LED drive current. Visual feedback must be handled externally-typically via I²C commands to a separate LED driver IC or host MCU GPIOs controlling discrete transistors.
Is the CapSense® block susceptible to water or condensation false triggers?
It includes wet-finger and water-tolerance algorithms (enabled via firmware registers) that suppress false triggers from uniform conductive films. Tested per IEC 61000-4-2 with 0.5 mm water layer shows no false touches when Wet-Finger Mode is active and baseline update rate is set to slow.
CY8C20142-SX1IT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Buttons
- Proximity Detection:
- No
- Number of Inputs:
- Up to 4
- LED Driver Channels:
- Up to 4
- 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:
- 8-SOIC
CY8C20142-SX1IT FAQ
1.How can I place an order for CY8C20142-SX1IT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20142-SX1IT 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 CY8C20142-SX1IT reliable?
The price and inventory of CY8C20142-SX1IT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20142-SX1IT is usually 5 days.
3.What payment methods are accepted for CY8C20142-SX1IT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20142-SX1IT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20142-SX1IT?
CY8C20142-SX1IT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20142-SX1IT 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 CY8C20142-SX1IT?
For technical support, including CY8C20142-SX1IT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20142-SX1IT requirements.
6.How does Aetrix verify that CY8C20142-SX1IT is sourced from the original manufacturer or authorized distributors?
All CY8C20142-SX1IT 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 CY8C20142-SX1IT meets industry standards.
7.What is the process for return or replacement of CY8C20142-SX1IT?
All CY8C20142-SX1IT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20142-SX1IT, 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 CY8C20142-SX1IT part is unused and in its original packaging.
Return procedure for CY8C20142-SX1IT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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