• Product Introduction

NE555DR Single-precision timer

illustrate   These devices are the ability of precision timing circuits to produce precise time delays or oscillations. In time-delay or monostable operation mode, the time interval is composed of an external resistor and capacitor network. In unsteady mode of operation, the frequency and duty cycle can independently control two external resistors and one external capacitor. The threshold and trigger level are generally two-thirds and one-third, respectively of V CC. These levels can change the end use of the control voltage. When the trigger input is below the trigger level, the trigger is set and the output becomes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the trigger resets and the output is low.   characteristic   The timing time is from microseconds Asteady or monostable operation Adjustable duty cycle TTL-compatible outputs can absorb or deliver up to 200 mA