Programmable delay timer with oscillator

The 74HC5555 is a precision programmable delay timer which consist of:

*

24-stage binary counter *

integrated oscillator (using external timing components) *

retriggerable/non-retriggerable monostable *

automatic power-ON reset *

output control logic *

oscillator control logic *

overriding asynchronous master reset (MR).

The 74HC5555 inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.