PBL38813 Overview
Description
The PBL 388 13 contains all the necessary circuitry, amplifiers, detectors, comparator and control functions to implement a high performance, voice-switched, loudspeaking, ”hands-free ” telephone. The gain dynamics (attenuation between channels) is selectable (25dB or 50dB) via a separate pin.
Key Features
- Minimum of external components needed for function
- Selectable gain dynamics
- (25 or 50 dB) Direct telephone line powered solution (patented)
- Low power consumption: ≈1mA at 3.3V (typical) for speech switching, audio power amplifier quiscent current ≈1mA
- Drives an 25 - 50 ohm loudspeaker without a transformer
- Background noise compensation in the transmitting channel with hold function at receive
- Input amplifiers of both channels have balanced inputs
- Exellent noise performance
- Encapsulated in 24 pin plastic ”skinny” DIP and 24 pin SO
