Datasheet Summary
May 1996
PBL 3853 Universal Speech Circuit
Description
The PBL 3853 is a biopolar integrated speech circuit with specific parameters making it highly suitable to be used as a line interface and speech circuit in a telephone line powered electronic payphone. Emphasis has been put on low current consumption in the IC thus facilitating that a greater part of the available line current can be used to power other electrical functions in the design. From a minimum line current of 16 mA, 12 mA at 4.5 V can be used to power auxiliary functions. The circuit can optionally create an active impedance towards the telephone line, set by external passive ponents, to reduce the current consumption...