# standard cell library

Status
Not open for further replies.

#### vashistha

##### Junior Member level 3
How to decide the height of cells (layout) in standard cell library??

#### erikl

##### Super Moderator
Staff member
About 10..12 metal1 pitches (pitch = min. width + min. spacing)

vashistha

### vashistha

Points: 2

#### vashistha

##### Junior Member level 3
min. width=0.23
min. spacing=0.25
pitch = 0.48
height of standard cell= 4.8 to 5.76
is this correct?

#### erikl

##### Super Moderator
Staff member
... is this correct?

I think so. 5µm is the cell height of many 0.18µm Std Cell Libs.

#### vashistha

##### Junior Member level 3
Thanks erikl...Can u please suggest me some books or pdfs to understand the common centroid layout technique

Staff member
vashistha

### vashistha

Points: 2

Thanks erikl...

#### littlej_zju

##### Member level 2
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
Thnx ramesh28 & littlej_zju

#### Prashanthanilm

##### Full Member level 5
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
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.

Replies
1
Views
1K
Replies
1
Views
2K
Replies
0
Views
1K
Replies
0
Views
353
Replies
7
Views
3K