Difference between ic555 and ic1555

Thread Starter

Electro-learner

Joined Mar 18, 2015
11
I thought that we have only one ic 555 timer.
But recently when I looked at the circuit diagram of a 555 timer, it said "IC1 555".

Are both different?In what sense?And can I use an IC555 timer in place of IC1 555?
Both seem to have similar functions in the circuit diagram(as an astable multivibrator).
 

bertus

Joined Apr 5, 2008
22,923
Hello,

The IC1 will be the designation for the first IC in the schematic.
The 555 can be bought in several versions.
The bipolair version can output more current as the CMOS version.
The LM555 / NE555 / SA555 are bipilair versions.
The LMC555 is a CMOS version.

Bertus
 

DerStrom8

Joined Feb 20, 2011
2,390
Really need some pictures to answer this.

MICREL makes a part called the MIC1555 that is a one-shot timer. I expect in your situation, however, you are reading the designator as well as the part number, rather than just the part number. There is no "IC555" part number, as to my knowledge no companies prefix their part numbers with "IC". Usually a 555 timer is preceded by an "NE" (Texas Insturments), "LM" (Fairchild), or "SE" (STMicroelectronics).
 

#12

Joined Nov 30, 2010
18,224
What DerStrom said. There is no such part number as IC1555 just as there is no part number Timer555.
You simply assumed a (component designator) label was a part number.
 
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