FX4071

The FX 4070A, FX 5070A, FX 4071A and FX 5071A are integrated circuits fabricated using thick film hybrid techniques and include a monolithic LSI semiconductor chip. The circuit comprises all necessary components to provide a 5-tone selective calling encoder/decoder which complies with the requirements of the CCIR standard (FX 4070A or FX 4071A) or the ZVEI standard (FX 5070A or FX 5071A). In all respects the operation of these devices is identical to the recommended circuit used in the application of the CML FX 407A/FX 507A integrated circuit. The hybrid circuits include passive components necessary for correct system operation, the trimmer potentiometer required to set frequency calibration is externally connected and external components may also be used to modify internally set system timing parameters.