Lm1921 1 Amp Industrial Switch

The LM1921 Relay Driver incorporates an integrated power PNP Transistor as the main driving element. The advantages of this over previous integrated circuits employing NPN power elements are several. Greater output voltages are available off the same supply for driving grounded loads; typically 4.5 volts for a 500 mA load from a 5.0 volt supply. The output CAN swing below ground potential up to 57 volts negative with respect to the positive power supply. This CAN be used to facilitate rapid decay times in inductive loads. Also, the IC is immune to negative supply voltages or tran- sients. The inherent Safe Operating Area of the lateral PNP allows use of the IC as a bulb driver or for capacitive loads. Familiar integrated circuit features such as short circuit pro- tection and thermal shutdown are also provided. The input voltage threshold levels are designed to be TTL, CMOS, and LSTTL compatible over the entire operating tempera- ture range. If several drivers are used in a system, their inputs and/or outputs may be combined and wired together if their supply voltages are also common. By National Semiconductor Corporation
LM1921 's PackagesLM1921 's pdf datasheet



LM1921 Pinout, Pinouts
LM1921 pinout,Pin out
This is one package pinout of LM1921,If you need more pinouts please download LM1921's pdf datasheet.

LM1921 Application circuits
LM1921 circuits
This is one application circuit of LM1921,If you need more circuits,please download LM1921's pdf datasheet.


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