CS6420

CS6420 Full-Duplex Speakerphone Chip Features l Single-chip full-duplex hands-free operation l Automatic gain control l Optional 34 dB microphone preamplifier l Integrated mute and volume control l Integrated 80 dB IDR dual codec l Speech-trained Network and Acoustic Echo Cancellers l Powerdown mode l Microcontroller Interface General Description Most modern speakerphones use half-duplex operation, which switches transmission between the far-end talker and the speakerphone user. This is done because the acoustic coupling between the speaker and microphone is much higher in speakerphones than in handsets where the coupling is mechanically suppressed. The CS6420 enables full-duplex conversation with a single-chip solution. The CS6420 can easily replace existing half-duplex speakerphone ICs with a huge increase in conversation quality. The CS6420 consists of telephone & audio interfaces, two codecs and an echo-cancelling DSP. ORDERING INFORMATION CS6420-CS CDB6420 20-pin SOIC Evaluat...