The
IC 555 timer was invented by “Signetic Corporation” and it was termed as SE or
NE555 timer. Generally, it is a monolithic timing circuit that gives precise
and highly stable delays of time or oscillation. These types of ICs are very
cheap and reliable in cost when we compared with the OP-Amp applications in the
same areas. These ICs are used as an astable and monostable multivibrators in
digital logic probes, DC-DC converters, tachometers, analog frequency
meters, voltage regulators, temperature controlled and measurement devices. The
IC SE555 is used for where the temperature ranges from – 55°C to 125°C and the
IC NE555 is used for where the temperature ranges from 0° to 70°
Features
·
Direct replacement for
the SE555/NE555.
·
Timing times from
microseconds to hours.
·
Can operate in both
unregulated and monostable mode.
·
Adjustable duty cycle.
·
Outputs can receive
and supply 200mA.
·
Output voltages are
TTL level compatible.
·
Temperature stability
better than 0.005%/°C.
Application
§ Precision timing
§ Pulse generation
§ Continuous Timing
§ Frequency conversion
§ Pulse Width Modulation
§ Pulse phase modulation
No review given yet!