Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Symbol CP2 XDI CPT TLI TLO VB CT CD NC CPR RLI RLO GND RAO RAI RXO RXI MUTE VLC Description A capacitor at this pin stores voltage representing the transmit background noise and speech levels for the background noise monitor.
Input to the transmit
Order this document by MC33219A/D MC33219A Voice Switched Speakerphone The Motorola MC33219A Voice Switched Speakerphone Circuit incorporates the necessary amplifiers, attenuators, level detectors, and control algorithm to form the heart of a high quality hands free speakerphone system.
Included are a microphone amplifier with mute, transmit and receive attenuators, a background monitoring system for both the transmit and receive paths, and level detectors for each path.
An AGC system r
MC33219A Features
* ound noise monitor. Input to the transmit background noise monitor. An RC sets the time constant for the transmit background noise monitor. Input to the transmit level detector. Output of the transmit level detector. A mid
* supply reference voltage, and analog ground for the amplifiers. This
Datasheet Details
MC33219A
Motorola
562.65 KB
Voice switched speakerphone circuit.
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