TBA673 Datasheet (Philips) - RING (DE)MODULATOR

TBA673, RING (DE)MODULATOR

TBA673 II II RING (DE)MODULATOR FOR TELEPHONY AND INDUSTRIAL EQUIPMENT The TBA673 is a monolithic integrated circuit comprising a 4-transistor modulator and demodulator circuit.

The four transistors must be as identical as possible; the lay-out has been designed to achieve this and the best possible tracking of the transistor parameters with tempera ture.

QUICK REFERENCE DATA Collector cut -off current IE = 0; VCB = 5 V; Tamb = 25 °c Base-emitter voltage differences between transistors 1, 2,