MC1555 Datasheet (Motorola)

MC1555, Timing Circuit

MC1455 MC1555 Specifications and Applications Information I 4 TIMING CIRCUIT The MC1555/MC1455 monolithic timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation.

Additional terminals are provided for triggering or resetting if desired.

In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor.

For astable operation as an oscillator, the free running frequency and the duty cycle are both accurately

MC1555 Features

* 01 (RA+2RB) 0.001 0.1 1,0 10 100 l.Ok 10 k (Hz) 100k f, FREE-RUNNING FREQUENCY m MOTOROLA Semiconductor 5 Products Inc. ~ I APPLICATIONS INFORMATION ,

* Linear Voltage Ramp In the monostable mode, the resistor can be replaced bv a constant current source to provid