LM122

The LM122/LM322/LM3905 series are precision timers that offer great versatility with high accuracy. They operate with unregulated supplies from 4.5V to 40V while maintaining constant timing periods from microseconds to hours. Internal logic and regulator circuits complement the basic timing function enabling the LM122 series to operate in many different applications with a minimum of external components.The output of the timer is a floating transistor with built in current limiting. It can drive either ground referred or supply referred loads up to 40V and 50 mA. The floating nature of this output makes it ideal for interfacing,

Features of the LM122/LM322/LM3905 are:(1) Immune to changes in trigger voltage during timing interval; (2)Timing periods from microseconds to hours; (3) Internal logic reversal; (4) Immune to power supply ripple during the timing interval; (5) Operates from 4.5V to 40V supplies; (6) Input protected to g40V; (7) Floating transistor output with internal current limiting; (8) Internal regulated reference; (9) Timing period can be voltage controlled; (10) TTL compatible input and output.

The absolute maximum ratings of the LM122/LM322/LM3905 can be summarized as:(1)Power Dissipation:500mW;(2)V+ Voltage:40V;(3)Collector Output Voltage: 40V;(4)VREF Current :5mA;(5)Logic Reverse Voltage:5.5V;(6)Lead Temperature (10 sec):260°C. If you want to know more information such as the electrical characteristics about the LM122/LM322/LM3905, please download the datasheet in www.seekic.com or www.chinaicmart.com.