Description
The PBL 388 12 contains all the necessary circuitry, amplifiers, detectors, comparators and control functions to implement a high performance, voice-switched, ”hands-free ” function in an answering machine. The gain dynamics (attenuation between channels) is settable (25dB or 50dB) via CTR pin that also control two mute levels. A background noise detector in the transmitting channel reduces the influence of continuous noise signals.

Key Features
• Settable gain dynamics (25 or 50 dB).
• Low power consumption, totally 1.0mA at 3.3V typical.
• Background noise compensation in the transmitting channel with hold function.
• Exellent noise performance.
• Both channel input amplifiers have balanced inputs.
• Minimum of external components needed for function.
• 16-pin SO and 18-pin DIP encapsulation.