TBA673 Datasheet | Philips Semiconductors

II II RING (DE)MODULATOR FOR TELEPHONY AND INDUSTRIAL EQUIPMENT The TBA673 is a monolithic integrated circuit prising 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, 3, 4 VCB = 5 V; -IE = 150 IJA D. C. current gain differences between transistors 1, 2, 3, 4 VCB = 5 V; -IE = 150 IJA leBO !VBEl-VBE2 /VBE3 -VBE41 IhpBl -hpB2 I IhpB3 -hpB4 ! < 100 <5 <5 < 0,008 <...