First line: [AK2343] CTCSS (Continuous Tone Controlled Squelch System) Encoder/Decoder programmed with frequencies. Integrated voice signal circuits such limiter, splatter filter, etc. Built-in tone signal elimination filter Built-in power down function Built-in (3.6864 4.194304 MHz) oscillator circuit with cryAbstract: .. ASAHI KASEI [AK2343] Feature □ CTCSS Continuous Tone Controlled Squelch System Encoder/Decoder □ Can be programmed with up 39 frequencies. □ Integrated voice signal circuits such as a limiter .. Tags: datasheet abstract..