PBL3719

PBL3719 is a standard version of the PBL3726 family of mask-programmable,monolothic intergrated speech circuits for use in electronic telephones. PBL3719 is designed for use with a piezaceramic microphone and receiver.  Typical current feeds as 48 V 2 X 200 ohm, 48 V 2 X 400 ohm and 36 V 2 X 500 ohm can be handled.Applicaiton dependent parameters like impedance to the line, side tone level, gain and frequency response are set by external components.Parameters are set independently which means easy adaption or various maket meeds.

PBL3719 has many unique features: The first one is minimum number of inexpensive external components,5 capacitors and 13 resistors. The second one is mute function for parallel operation with DTMF-generator. The third one is transmit and receive gain regulation for automatic loop loss compensation. The forth one is soft clipping,all active components included.The fifth one is balanced receiver output stage. The sixth one is differential mircophone input for good nalance to ground(common mode rejection),etc. There are some maximum ratings about it. Line voltage is 0 V min and 22 V max.line current(continous) is 0 mA min and 130 mA max. Operating temperature range is -40 min and +70 max.Storage temperature is -55 min and +125 max.

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