223B-TD

223B-TD is a dedicated single-key capacitive touch detection sensor IC. The device employs next-generation charge detection technology to determine finger proximity or touch state by sensing the charge level generated between the operator's finger and the touch pad. Its design contains no mechanical components, eliminating wear-related issues. The sensing element can be placed behind any insulating layer (such as glass or plastic), enabling keyboard designs that are fully sealed from the surrounding environment. Panel graphics can be freely customized, with flexible options for key size and shape, and can be combined with characters, logos, transparent windows, and other elements to achieve an attractive, modern appearance that resists fading, deformation, and long-term wear. This technology fundamentally overcomes the limitations of traditional metal and mechanical panels — delivering both high reliability and complete freedom in aesthetic design. It serves as a drop-in replacement for conventional panels (such as metal keypads, membrane keypads, and conductive rubber keypads) with no modifications required to existing firmware or software. The device offers the advantages of minimal external components, low cost, and low power consumption.

Applications

• Touch DVD
• Touch remote control
• Touch MP3/MP4
• Touch keypad lock
• Touch rice cooker
• Touch microwave oven
• Touch electric water heater
• Touch electric fan
• Touch refrigerator
• Touch vacuum cleaner
• Touch air purifier
• Touch range hood
• Touch speaker
• Touch dimmer light
• Touch electrical switch
• Touch printer
• Touch fax machine
• Touch LCD TV
• Touch LCD monitor
• Touch telephone

Key features

• Wide input voltage range: 2.0V~5.5V
• Ultra-low operating current: 3.5uA
• Sensitivity adjustable via external capacitance
• Supports synchronous output mode and level-toggle output mode
• Independent touch key control with self-calibration
• Built-in LDO regulator for stable and reliable operation
• SOT23-6 package