The NE555DR is a precision timing circuit by Texas Instruments. It is a highly stable and versatile timing circuit designed to produce accurate time delays or oscillation. It can be operated in either astable or monostable mode. It is an 8-pin device that has a single, 2-10 V supply voltage range with peak current of 200 mA. Its features include trigger and reset inputs, two external components for precision timing and exact frequency setting, and a temperature compensation of ± 0.005%/°C. Its operating temperature ranges from 0° to 70° C.