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Cypress Semiconductor Corp CY8C20180-SX2I
- Part No.:
- CY8C20180-SX2I
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C20180-SX2I.pdf
- Description:
- MEMORY CIRCUIT, 2KX1, CMOS, PDSO
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
CY8C20180-SX2I from Cypress Semiconductor is an 8-button capacitive touch controller with integrated I2C interface, nonvolatile configuration storage, and GPIO-driven LED dimming capability. It operates across 2.4–2.9 V, 3.1–3.6 V, or 4.75–5.25 V supply rails, draws only 1.5 mA active current and 4 µA in deep sleep, and delivers robust RF/AC noise immunity for front-panel human interface applications.
For engineers reviewing the CY8C20180-SX2I datasheet, CY8C20180-SX2I pinout, CY8C20180-SX2I application, or CY8C20180-SX2I equivalent, key selection criteria include configurable CapSense input count (8 buttons), I2C address flexibility, PWM-based LED intensity control, interrupt/wake-on-touch support, and industrial temperature range (–40 °C to +85 °C) compliance.
Technical Context
The CY8C20180 implements a dedicated capacitive sensing core with adaptive baseline tracking and digital filtering to maintain stable button detection under varying environmental conditions. Its I2C interface supports up to 400 kbps data rate, clock stretching, and fully configurable 7-bit slave address without external strapping.
All 10 GPIOs (GP0[0]–GP0[4], GP1[0]–GP1[4]) are software-configurable as CapSense inputs or general-purpose outputs with programmable drive strength. Nonvolatile memory stores user-tuned sensor parameters-including sensitivity thresholds, scan intervals, and LED dimming duty cycles-for automatic power-on initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CapSense Inputs | 8 configurable capacitive buttons with auto-calibration and noise rejection |
| Supply Voltage Ranges | 2.4–2.9 V, 3.1–3.6 V, or 4.75–5.25 V - enables direct integration into multiple rail systems |
| Active Current | 1.5 mA continuous scan - supports always-on touch interfaces with minimal power budget impact |
| Deep Sleep Current | 4 µA - sustains battery-powered devices for extended standby periods |
| I2C Interface | Up to 400 kbps, 7-bit address, clock stretching supported - compatible with standard microcontroller I2C peripherals |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial and consumer equipment deployment |
| Nonvolatile Storage | On-chip EEPROM for persistent configuration - eliminates external configuration memory and boot-time host setup |
Pinout & Package
Package: 16-pin QFN (3 × 3 × 0.6 mm, no e-pad) - surface-mount, thermally efficient, suitable for space-constrained HMI modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GP0[0]–GP0[4], GP1[0]–GP1[4] | Configurable GPIO/CapSense input | 10 total pins; 8 assigned to buttons, remaining 2 unused per device variant - flexible layout routing |
| I2C SCL / I2C SDA | I2C serial interface | Supports 1.8 V–5.25 V signaling with internal pull-up option - simplifies level-shifting in mixed-voltage systems |
| VDD / VSS | Power supply / ground | Decoupling capacitor required at VDD pin (typ. 0.1 µF) - ensures stable operation during high-frequency sensor scans |
| XRES | Active-high reset | Internal pull-down - allows clean power-on reset without external RC network |
| CSint | Integrating capacitor input | External 1–4.7 nF capacitor sets SNR performance - optional if 5:1 signal-to-noise ratio is met internally |
Key Features
| Feature | Design Value |
|---|---|
| Run-time I2C reconfiguration | Full register set accessible over I2C during operation - enables dynamic sensitivity adjustment without firmware reload |
| LED dimming control | GPIO outputs support PWM dimming with selectable duty cycles - drives LEDs directly without external driver ICs |
| Interrupt and wake-on-touch | Dedicated interrupt output asserts on button press - reduces host polling overhead and enables low-power system wake events |
| No external components required | Single-chip solution with integrated oscillator, reference, and charge pump - eliminates BOM cost and board area for passive tuning elements |
| Factory-programmed defaults | Preloaded configuration enables immediate operation - accelerates evaluation and prototype bring-up |
Applications
| Printers | Cellular Handsets |
|---|---|
Use Scenario: Front-panel control of copy, scan, and fax functions on multifunction printers. IC Role / Device Role / Timing Role: Capacitive touch controller managing eight physical buttons with tactile feedback via integrated LED dimming. Use Value: Immunity to AC line noise prevents false triggers near power supplies; deep sleep mode extends standby time between print jobs. | Use Scenario: Touch-sensitive navigation keys and status indicators on feature phone keypads. IC Role / Device Role / Timing Role: Low-voltage (2.4–2.9 V) CapSense controller interfacing to baseband processor via I2C. Use Value: 4 µA deep sleep current preserves battery life; robust RF noise immunity avoids interference from cellular transceivers. |
| LCD Monitors | Portable DVD Players |
Use Scenario: On-screen menu navigation and volume/brightness control using bezel-mounted touch buttons. IC Role / Device Role / Timing Role: I2C-configurable 8-button controller with nonvolatile settings for consistent user experience across power cycles. Use Value: Factory-tuned defaults enable plug-and-play integration; wide voltage range supports both 3.3 V and 5 V monitor logic rails. | Use Scenario: User interface for playback controls (play/pause/forward/back) and display backlight management. IC Role / Device Role / Timing Role: Dual-role device acting as both capacitive input scanner and LED dimmer for OLED/LCD backlight. Use Value: Integrated PWM dimming eliminates need for separate LED driver; 8-button capacity covers full remote-style function set. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT2120-MAHR | 12-button capacity, 1.8–5.5 V operation, no integrated LED dimming | Requires external LED driver circuitry; higher pin count for same functionality | Select when >8 buttons needed and LED control is handled separately |
| STMPE1600QTR | 16-channel capacitive controller, I2C interface, no built-in nonvolatile config storage | Host MCU must manage calibration and store settings externally; higher software integration effort | Select when system already uses STM32 ecosystem and requires scalable channel count |
Compared with AT42QT2120-MAHR and STMPE1600QTR, CY8C20180-SX2I provides tighter integration-combining 8-button sensing, I2C configurability, nonvolatile storage, and LED dimming in one 16-pin QFN-reducing component count, PCB area, and firmware complexity for mid-channel-count HMI designs.
Availability
CY8C20180-SX2I is available at Aetrix Electronics and suitable for printers, LCD monitors, and portable DVD players requiring stable component supply, long-term lifecycle support, and drop-in replacement capability for legacy CapSense Express designs.
Supply support for CY8C20180-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
Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable system-on-chip (PSoC) solutions, USB controllers, and human interface technologies.
The CapSense Express™ product line was designed specifically for cost-sensitive, space-constrained capacitive touch applications requiring zero-firmware integration, factory-tuned reliability, and seamless I2C host connectivity.
FAQ
What is the maximum number of capacitive buttons supported by CY8C20180-SX2I?
CY8C20180-SX2I supports exactly 8 capacitive buttons. This is fixed by silicon configuration-not software-configurable beyond 8 inputs. The device shares pin resources with the CY8C20110 (10-button) and CY8C20160 (6-button) variants, but its internal routing and factory programming limit usable CapSense inputs to eight, with two GPIOs reserved and inactive.
Does CY8C20180-SX2I require an external crystal or resonator?
No external timing component is required. CY8C20180-SX2I integrates a precision internal oscillator for CapSense scanning and I2C timing. The device uses this oscillator exclusively-no crystal, ceramic resonator, or external clock source is needed, reducing BOM count and layout complexity.
Can CY8C20180-SX2I drive LEDs directly without current-limiting resistors?
No. While CY8C20180-SX2I provides strong GPIO drive capability and PWM dimming, external current-limiting resistors are mandatory for LED connections. The datasheet specifies maximum sink/source current per GPIO (±25 mA), and omitting resistors risks exceeding absolute maximum ratings and damaging the output drivers.
Is the I2C address of CY8C20180-SX2I fixed or configurable?
The I2C address is fully configurable via internal registers and stored in nonvolatile memory. Default factory address is 0x24, but users can change it to any valid 7-bit value (0x00–0x7F) through I2C write commands-enabling multiple devices on the same bus without hardware strapping or address jumpers.
CY8C20180-SX2I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Verified
- Type:
- Buttons
- Proximity Detection:
- No
- Number of Inputs:
- Up to 8
- LED Driver Channels:
- Up to 8
- 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
CY8C20180-SX2I FAQ
1.How can I place an order for CY8C20180-SX2I through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20180-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 CY8C20180-SX2I reliable?
The price and inventory of CY8C20180-SX2I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20180-SX2I is usually 5 days.
3.What payment methods are accepted for CY8C20180-SX2I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20180-SX2I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20180-SX2I?
CY8C20180-SX2I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20180-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 CY8C20180-SX2I?
For technical support, including CY8C20180-SX2I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20180-SX2I requirements.
6.How does Aetrix verify that CY8C20180-SX2I is sourced from the original manufacturer or authorized distributors?
All CY8C20180-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 CY8C20180-SX2I meets industry standards.
7.What is the process for return or replacement of CY8C20180-SX2I?
All CY8C20180-SX2I units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20180-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 CY8C20180-SX2I part is unused and in its original packaging.
Return procedure for CY8C20180-SX2I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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