Yes, basically Different manufacturer. Google 555 Datasheet and it will give you all the information you need.Hello,
I recently purchased a timer somewhere.I put in the paper (because I'm not the one who purhcased) 555 Timer (NE555). Is that correct? But they keeps giving me LM555 CN timer instead. Why? Are they the same?
THANKS!!!!
Sorry to say it is NOT correct.Lightfire said:I recently purchased a timer somewhere.I put in the paper (because I'm not the one who purhcased) 555 Timer (NE555). Is that correct? But they keeps giving me LM555 CN timer instead. Why? Are they the same?
What you refer to as a low power 555 is not a 555. It is a CMOS 555, and has major, major differences in characteristics. It's drive is weak, it can go from 2VDC to 18VDC, and basically is just enough different from a classic 555 as to be considered a different part, as in many cases they are not interchangeable, mostly due to drive characteristics and the resistors used to set the 1/3 and 2/3 voltage points.Also low power versions of 555 are made like ICM7555.
Their is a dual version of 555 like 556 which have two timers and 558 is the quad version i.e it have four timers.
But as you may see on the "Parts Required" it said that it should be NE555. Now, I am worried that it might not work (the project will not work) if I will use LM555 instead. Or what? Help?
- resistors: 470 ×4, 1k ×2, 10k ×8
- capacitors: 0.1µF ×4, 1µF radial
- diodes: 1N4148 ×4
- LEDs: 1 each red, green, yellow and blue, all 5mm diameter
- 555 timer ICs (such as NE555) ×4
- DIL sockets for ICs: 8-pin ×4
- bleeper suitable for 9V
- on/off switch
- push switch ×5
- battery clip for 9V PP3
- 2-core cable such as 'figure 8', about 8 metres
- stripboard: 10 rows × 50 holes
Can yo explain it more,as far I know the most low power version of 555 is ICM7555,they have the same pin config.. and the trigger and threshold voltage reference point is also same,I dont find much difference over the interface.Of course as it is a low power version it will not sink or source current like 555.Bill_Marsden said:What you refer to as a low power 555 is not a 555. It is a CMOS 555, and has major, major differences in characteristics. It's drive is weak, it can go from 2VDC to 18VDC, and basically is just enough different from a classic 555 as to be considered a different part, as in many cases they are not interchangeable, mostly due to drive characteristics and the resistors used to set the 1/3 and 2/3 voltage points.
No here is how it should be...Please take a look at my attached image if my time numberings was correct.
Thank you very much debjit625.Catapult another thing, the way I showed the numbering of the pins for IC 555 ,it applies to almost every IC with DIP.You start with the notch or dot mark of the IC and you count down to the bottom pin, then you move to the other side and start counting from the bottom pin to the top pin.
You can read this ,the section "Orientation and lead numbering" in
http://en.wikipedia.org/wiki/Dual_in-line_package
Good luck for your 555 project.
Okay. Thank you.The part is the same. As a rule of thumb, all 555's can swap out OK, and all CMOS 555's can swap out. I gave you an attachment on another thread that showed it pretty well, I'll post it here too.
Sure, start another thread and I'll go into more detail.Can yo explain it more,as far I know the most low power version of 555 is ICM7555,they have the same pin config.. and the trigger and threshold voltage reference point is also same,I dont find much difference over the interface.Of course as it is a low power version it will not sink or source current like 555.
What? No 4013?!The part is the same. As a rule of thumb, all 555's can swap out OK, and all CMOS 555's can swap out. I gave you an attachment on another thread that showed it pretty well, I'll post it here too.
Bill very nice illustration on chip pin out. Thanks, I'll add that to my library.The part is the same. As a rule of thumb, all 555's can swap out OK, and all CMOS 555's can swap out. I gave you an attachment on another thread that showed it pretty well, I'll post it here too.
by Jake Hertz
by Aaron Carman
by Jake Hertz