HC4P5504B-5 Datasheet, Features, Application

HC4P5504B-5 - EIA/ITU PABX SLIC with 40mA Loop Feed

HC4P5504B-9 - EIA/ITU PABX SLIC with 40mA Loop Feed

HC4P5504B1-5 - ITU Low Cost/ PABX SLIC With 40mA Loop Feed