CY8C20180-SX2I

Overview

The CY8C20180-SX2I is a CapSense Express capacitive controller supporting eight capacitive button inputs. It operates within voltage ranges of 2.4 V to 2.9 V, 3.10 V to 3.6 V, and 4.75 V to 5.25 V. Active current consumption is 1.5 mA during continuous sensor scanning, while deep sleep current drops to 4 µA. The device features an I2C interface with data rates up to 400 kbps and supports configurable addressing. It functions in active, periodic sleep, and deep sleep modes, operating across an industrial temperature range from -40 °C to +85 °C.

Feature Summary

• Robust sensing algorithm providing high sensitivity and low noise with immunity to RF and AC interference
• Configurable outputs allowing strong drive for LEDs and direct control via I2C or input state
• Nonvolatile storage capability for saving custom settings that load automatically at power-on
• Supports interrupt outputs, user-defined inputs, and wake-on-interrupt functionality

Applications

• Printers
• Cellular handsets
• LCD monitors
• Portable DVD players

Procurement Notes

Verify the specific suffix SX2I against official ordering information to confirm package type and tape-and-reel specifications. Confirm the exact voltage grade required for the application environment. Ensure the host system supports the I2C protocol with clock stretching capabilities as specified in the communication timing requirements.

Selection Notes

Select this component when eight capacitive buttons are required without complex firmware development. Consider the CY8C20110 variant if LED dimming functionality is necessary. Evaluate the available packages (QFN, SOIC) based on board space constraints. Verify that the host microcontroller can support the required I2C addressing and register configuration commands.

Part Context

This part belongs to the Cypress CapSense Express family of capacitive controllers. These devices integrate a robust sensing core, control registers with nonvolatile memory, and configurable outputs into a single chip. They are designed to replace mechanical switches in consumer electronics, offering a simplified design process through I2C configuration and eliminating the need for external components.

Replacement Considerations

CY8C20110 provides ten buttons and includes LED dimming features. CY8C20160 offers six capacitive button inputs. CY8C20140 supports four capacitive buttons. CY8C20142 is a four-button variant in an 8-pin package.