PSB6520-2

The PSB6520-2 is Bipolar tone ringer IC. It in conjunction with an electro-acoustic converter,replace the mechanical bell in a telephone set. The components generate two periodic switchable tone frequencies anf can either directly drive a piezo-cermaic converter or a loudspeaker.

Features of the PSB6520-2 are:(1)integarted bridge rectifier allows direct input via call signal;(2)low current consumption;(3)high noise immunity due to bulit-in voltage-current hysteresis;(4)direct replacement of the mechanical bell requiring only few additional external components and an acoustic converter;(5)two tone frequencies,switched internally;(6)tone and switching frequencies adjustable by means of a resistor and a capacitor;(7)overvoltage protection.

The absolute maximum ratings of the PSB6520-2 can be summarized as:(1)AC input voltage(pin1 to pin8 peak to peak):28V;(2)DC input voltage(pin7 to pin2):26V;(3)input current(pin1,8):30mA;(4)ringing voltage:150V;(5)transient current spikes into the output(pin5):±20mA;(6)voltage applied at CS(pin3 to pin2):5.5V;(7)voltage applied at RT(pin4 to pin2):7V;(8)operating temperature:-20 to 70;(9)storage temperature:-55 to 125;(10)junction temperature:150;(11)thermal resistance junction-air:140K/W.

If you want to know more information such as the electrical characteristics about the PSB6520-2, please download the datasheet in www.seekic.com or www.chinaicmart.com .