Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

The datasheet of LM139

Status
Not open for further replies.

sumanas

Newbie level 5
Joined
Apr 2, 2011
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,324
hi,
i need following data sheets,LM139 U1-(A,B),LM139U2-(A,B,C,D).U1-A what does it stands for.........
thanks
 

alexan_e

Administrator
Joined
Mar 16, 2008
Messages
11,888
Helped
2,021
Reputation
4,158
Reaction score
2,031
Trophy points
1,393
Location
Greece
Activity points
64,371
Re: Data sheets of LM139

You are actually confusing the actual component code which is LM139 with the component identifier on the schematic.
U1,U2,U3 etc represent one chip each and the letters A,B,C,D represent the four comparators included in each chip.

The datasheet of LM139 is **broken link removed**

Alex
 

atripathi

Advanced Member level 1
Joined
Dec 2, 2009
Messages
450
Helped
91
Reputation
182
Reaction score
88
Trophy points
1,318
Location
INDIA
Activity points
3,818
A B C D are nothing but parts per package for that device. So LM139 can be seen as collection of 4 identical devices (comparators) and they are uniquely identified as A B C D.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top