Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

standard cell library

Status
Not open for further replies.

vashistha

Junior Member level 3
Joined
Jul 9, 2013
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
174
How to decide the height of cells (layout) in standard cell library??
 

erikl

Super Moderator
Staff member
Joined
Sep 9, 2008
Messages
8,112
Helped
2,689
Reputation
5,358
Reaction score
2,291
Trophy points
1,393
Location
Germany
Activity points
44,154
About 10..12 metal1 pitches (pitch = min. width + min. spacing)
 

vashistha

Junior Member level 3
Joined
Jul 9, 2013
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
174
min. width=0.23
min. spacing=0.25
pitch = 0.48
height of standard cell= 4.8 to 5.76
is this correct?
 

vashistha

Junior Member level 3
Joined
Jul 9, 2013
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
174
Thanks erikl...Can u please suggest me some books or pdfs to understand the common centroid layout technique
 

erikl

Super Moderator
Staff member
Joined
Sep 9, 2008
Messages
8,112
Helped
2,689
Reputation
5,358
Reaction score
2,291
Trophy points
1,393
Location
Germany
Activity points
44,154

littlej_zju

Member level 2
Joined
Dec 5, 2006
Messages
42
Helped
6
Reputation
12
Reaction score
4
Trophy points
1,288
Activity points
1,480
We usually call std cell libs height as 7T, 9T, 12T (tracks). The track herein is metal1 minimum pitch (width+space).
For example,
65nm, metal1 pitch 0.2um (width/space=0.1um/0.1um). 7T cell height is 1.4um (0.2*7).
 

vashistha

Junior Member level 3
Joined
Jul 9, 2013
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
174
Thnx ramesh28 & littlej_zju
 

Prashanthanilm

Full Member level 5
Joined
Aug 24, 2012
Messages
303
Helped
36
Reputation
72
Reaction score
35
Trophy points
1,308
Activity points
2,950
Hi ,

The Standard Cell Height is derived from metal pitch.
Metal Pitch will be Via to Via , Line to Line (Not used in many libraries) , Line to Via and pSuedo Via .
Also depends on the Application of the Library.

High Density , High Performance or Density or Performance .

When you decide the Height , the DRC rule are referred recursively to place the pins and make the library Porous .
 

vashistha

Junior Member level 3
Joined
Jul 9, 2013
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
174
Hi Prashanthanilm,

I dont understand what are you trying to explain. Can u Please make it more clear.

Thanks
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top