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Cypress Semiconductor Corp CY8C20142-SX1I
- Part No.:
- CY8C20142-SX1I
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Sensor, Capacitive Touch
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C20142-SX1I.pdf
- Description:
- CAPSENSE , 2KX1 PDSO8
- Quantity:
- Payment:
- Shipping:
Inventory:1,521
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Product details
Overview
CY8C20142-SX1I from Infineon (formerly Cypress) is a capacitive touch-sensing microcontroller based on the PSoC™ 1 architecture, featuring an 8-bit M8C core, integrated CapSense® CSD (Capacitive Sigma-Delta) engine, 4 KB flash, 256 B SRAM, and support for up to 14 capacitive sensing inputs. It operates from 2.4–5.25 V, delivers <1 µA deep-sleep current, and targets low-power human interface applications such as touch buttons, sliders, and proximity wake-up in consumer electronics.
For engineers reviewing the CY8C20142-SX1I datasheet, CY8C20142-SX1I pinout, CY8C20142-SX1I application, or CY8C20142-SX1I equivalent, key selection criteria include its dedicated hardware-based CapSense® engine (no firmware overhead), single-chip touch + MCU integration, I²C/SPI/UART interface options, and industrial temperature range (–40°C to +85°C) compliance.
Technical Context
The CY8C20142-SX1I integrates a programmable analog and digital block architecture with a dedicated CapSense® CSD module that performs sigma-delta modulation for high-noise-immunity capacitive sensing-enabling robust operation near LCDs, metal enclosures, or under thick overlays. Its M8C CPU runs at up to 24 MHz and supports interrupt-driven sensor polling without compromising real-time response.
All I/O pins are configurable for CapSense®, GPIO, analog input, or communication interfaces. The device includes an internal 1.2 V reference, 10-bit SAR ADC (shared with CapSense®), and programmable clock sources including an internal IMO (Internal Main Oscillator) trimmed to ±2% accuracy-eliminating external crystal requirements for basic touch applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit M8C CPU, 24 MHz max - enables deterministic real-time sensor processing with minimal code footprint. |
| CapSense® Engine | Dedicated CSD (Capacitive Sigma-Delta) hardware - offloads sensing computation, eliminates firmware timing sensitivity and noise filtering code. |
| Memory | 4 KB flash / 256 B SRAM - sufficient for multi-button/slider firmware with calibration storage and host communication stack. |
| Supply Voltage | 2.4–5.25 V - supports direct battery operation (e.g., 3×AA, Li-ion) and compatibility with common logic rails. |
| Deep-Sleep Current | <1 µA @ 3.3 V - enables multi-year battery life in remote controls or IoT peripherals with periodic touch wake-up. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive cabin-adjacent environments (e.g., center console, appliance panels). |
| I/O Count | 14 general-purpose I/O with CapSense® capability - supports up to 14 independent buttons, 2 sliders, or hybrid touch/proximity configurations. |
Pinout & Package
Package: SOIC-16 (150 mil width), RoHS-compliant, surface-mount. Pin pitch: 1.27 mm. Thermal pad not present.
| 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 | System ground return; must be low-impedance connection to minimize CapSense® noise coupling. |
| P0[0]–P0[7] | CapSense®/GPIO port 0 | 8 pins supporting mutual-capacitance or self-capacitance sensing; configurable as analog/digital I/O. |
| P1[0]–P1[5] | CapSense®/GPIO port 1 | 6 additional sensing-capable pins; share routing resources with UART/I²C functions. |
| SCL / SDA | I²C interface signals | Open-drain bidirectional lines; support standard-mode (100 kHz) and fast-mode (400 kHz) host communication. |
| TX / RX | UART transmit/receive | Asynchronous serial interface; TX is push-pull, RX is Schmitt-trigger input for noise immunity. |
| CLKIN | External clock input | Optional 1–24 MHz crystal or oscillator input; bypassed when using internal IMO. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CapSense® CSD Engine | Enables >60 dB noise rejection without firmware-based filtering-critical for noisy EMI environments like motor-driven appliances. |
| Configurable I/O with Analog Support | Each pin supports CapSense®, GPIO, analog comparator, or ADC input-reducing external component count in compact HMI designs. |
| Low-Power Deep-Sleep Mode | Wakes on touch event within 10 µs; maintains RAM state and retains calibrated baseline values across sleep cycles. |
| Integrated Communication Peripherals | I²C and UART interfaces allow seamless integration with host MCUs or displays-no external level shifters required for 3.3 V systems. |
| Factory-Calibrated IMO | Internal oscillator trimmed to ±2% over voltage/temperature-removes need for external crystal in cost-sensitive touch-only applications. |
Applications
| Smart Home Remote Control | Industrial Panel Button Array |
|---|---|
|
Use Scenario: Battery-powered universal remote with 12 capacitive buttons and slider volume control. IC Role / Device Role / Timing Role: Primary touch controller and system coordinator; handles button debouncing, slider interpolation, and I²C command transmission to main SoC. Use Value: Achieves 5+ year battery life via sub-1 µA deep-sleep and eliminates mechanical switch wear-out and contact corrosion issues. |
Use Scenario: Touch-enabled HMI panel in factory automation cabinet with metal enclosure and variable EMI exposure. IC Role / Device Role / Timing Role: Dedicated CapSense® acquisition engine; performs real-time noise compensation using CSD hardware and adaptive baseline tracking. Use Value: Maintains reliable touch detection despite 60 Hz AC field interference and thermal drift across –40°C to +85°C operating range. |
| Appliance Touch Keypad | Automotive Cabin Proximity Sensor |
|
Use Scenario: Glass-overlaid microwave oven keypad with water-resistant design and glove operation support. IC Role / Device Role / Timing Role: Capacitive sensing front-end with thick-glass overlay compensation; manages multiple simultaneous touch events and LED feedback timing. Use Value: Supports 4 mm glass overlay with >99% detection rate and automatic recalibration during humidity changes. |
Use Scenario: Door handle proximity wake-up system detecting hand approach before physical contact in vehicle entry systems. IC Role / Device Role / Timing Role: Low-power proximity sensor node; uses parasitic capacitance measurement and dynamic threshold adjustment for ambient compensation. Use Value: Triggers vehicle unlock within 300 ms of hand approach while consuming <5 µA average current in standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch-sensing microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATtiny412-MFR (Microchip) | AVR core, 4 KB flash, no dedicated CapSense® hardware-relies on software-based RC oscillation or CTMU; higher firmware overhead and lower noise immunity. | Limited to low-noise, low-channel-count (<8) touch applications; unsuitable for thick overlays or EMI-heavy environments. | Select when cost is primary constraint and system-level noise is controlled; avoid for industrial or automotive proximity use cases. |
| STM32G031K8T6 (STMicroelectronics) | Arm Cortex-M0+, 64 KB flash, 8 KB SRAM, no native CapSense®-requires external charge-transfer IC or software-based sensing with ADC/DAC; higher BOM count. | Better for mixed-signal applications needing USB, timers, or analog peripherals beyond touch-but adds complexity and power for pure touch nodes. | Choose when future expansion to non-touch functions (e.g., motor control, BLE) is planned; not optimal for standalone ultra-low-power touch. |
Compared with ATtiny412-MFR and STM32G031K8T6, CY8C20142-SX1I delivers superior touch performance per milliwatt due to its hardware-accelerated CSD engine, lower active/sleep current, and factory-tuned sensing algorithms-making it the most efficient choice for dedicated, production-ready capacitive HMI nodes.
Availability
CY8C20142-SX1I is available at Aetrix Electronics and suitable for smart home remotes, industrial HMI panels, appliance keypads, and automotive cabin proximity sensors requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.
Supply support for CY8C20142-SX1I 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and microcontrollers-with leadership in PSoC™ programmable system-on-chip platforms acquired from Cypress Semiconductor in 2020.
CY8C20142-SX1I belongs to the legacy PSoC™ 1 family, designed specifically for ultra-low-power, single-function capacitive touch interfaces where hardware-accelerated sensing and minimal firmware footprint are critical-targeting cost-sensitive, high-volume human interface applications.
FAQ
What is the maximum number of capacitive sensors supported by CY8C20142-SX1I?
The CY8C20142-SX1I supports up to 14 capacitive sensing inputs-configurable as individual buttons, linear sliders (up to 2), or proximity sensors. This count is fixed by its I/O structure and CSD hardware resource allocation; no firmware extension can increase it beyond 14 independent sensing elements.
Does CY8C20142-SX1I require an external crystal for stable CapSense® operation?
No. The device includes a factory-trimmed Internal Main Oscillator (IMO) accurate to ±2% over voltage and temperature, which is fully sufficient for CapSense® timing. An external crystal is optional and only needed if system-level timing precision beyond ±2% is required-for example, for UART baud rate accuracy above 400 kbps.
Can CY8C20142-SX1I drive LEDs directly from its GPIO pins?
Yes-each GPIO pin supports up to 25 mA sink/source current (with voltage drop constraints), enabling direct LED driving without external transistors. However, simultaneous activation of multiple LEDs may exceed total package current limits (max 100 mA aggregate), so current-limiting resistors and duty-cycle management are recommended for multi-LED indicators.
Is there a migration path from CY8C20142-SX1I to newer PSoC™ generations?
Infineon recommends migrating to PSOC™ 4000T or PSOC™ 4100S Plus for new designs-both offer enhanced CapSense® (SmartSense™ auto-tuning), lower power, Arm Cortex-M0+ cores, and extended temperature ranges. Migration requires firmware rewrite and PCB layout changes due to different pinouts and peripheral sets; no pin-compatible upgrade exists.
CY8C20142-SX1I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tube
- 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-SX1I FAQ
1.How can I place an order for CY8C20142-SX1I through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20142-SX1I 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-SX1I reliable?
The price and inventory of CY8C20142-SX1I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20142-SX1I is usually 5 days.
3.What payment methods are accepted for CY8C20142-SX1I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20142-SX1I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20142-SX1I?
CY8C20142-SX1I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20142-SX1I 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-SX1I?
For technical support, including CY8C20142-SX1I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20142-SX1I requirements.
6.How does Aetrix verify that CY8C20142-SX1I is sourced from the original manufacturer or authorized distributors?
All CY8C20142-SX1I 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-SX1I meets industry standards.
7.What is the process for return or replacement of CY8C20142-SX1I?
All CY8C20142-SX1I units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20142-SX1I, 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-SX1I part is unused and in its original packaging.
Return procedure for CY8C20142-SX1I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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