223B TDSEMIC

The 223B-TD is a dedicated single-key capacitive touch detection sensor IC. It employs next-generation charge detection technology to determine finger proximity or touch by measuring the charge level generated between the operator's finger and the touch pad. The product contains no mechanical components and is immune to wear. The sensing element can be placed behind any insulating layer (such as glass or plastic), making it ideal for constructing well-sealed keypads. Panel patterns can be freely designed, with flexible combinations of key size, shape, characters, logos, and display windows — resulting in an attractive, modern appearance that resists fading, deformation, and long-term wear. It fundamentally overcomes the limitations of traditional metal or mechanical panels, offering great flexibility in reliability and aesthetic design. It can directly replace existing conventional panels (such as metal keypads, membrane keypads, and conductive rubber keypads) with no modification to existing firmware or software required. The product features minimal peripheral components, low cost, and low power consumption.

Applications

• Touch DVD
• Touch Remote Control
• Touch MP3
• Touch Password Lock
• Touch Rice Cooker

Key features

• Wide input voltage range: 2.0V~5.5V
• Ultra-low operating current: 3.5uA
• Sensitivity adjustable via external capacitor value
• Synchronous output mode and level-switching output mode supported
• Independent touch key control with self-calibration
• Built-in LDO voltage regulator for improved stability and reliability
• SOT23-6 package