Precision Timers - National Semiconductor

The LM122 series are precision Timers LM122 LM322 LM3905 that offer great ver- satility 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 reg- ulator circuits complement the basic Timing function enabling the LM122 series to operate in many different ap- plications 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, lamp or relay driv- ing, and Signal Conditioning where an Open Collector or emit- ter is required. A Logic reverse circuit CAN be programmed by the user to make the output Transistor either on or off during the Timing period. The trigger input to the LM122 series has a threshold of 1.6V independent of supply voltage, but it is fully protected against inputs as high as g40Veven when using a 5V supply. The circuitry reacts only to the rising edge of the trigger signal, and is immune to any trigger voltage during the Timing periods. By National Semiconductor Corporation
LM122 's PackagesLM122 's pdf datasheet
LM322
LM3905




LM122 Pinout, Pinouts
LM122 pinout,Pin out
This is one package pinout of LM122,If you need more pinouts please download LM122's pdf datasheet.

LM122 Application circuits
LM122 circuits
This is one application circuit of LM122,If you need more circuits,please download LM122's pdf datasheet.


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