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# Bitcells
This page of the documentation explains the bitcells supported by OpenRAM.
## Table of Contents
1. [Multiport Bitcells ](#multiport-bitcells )
2. [Relative Bitcell Sizes ](#relative-bitcell-sizes-035um-scmos )
3. [Thin SRAM Bitcells ](#thin-sram-bitcells-130nm )
## Multiport Bitcells
* Based on 6T SRAM cell
* Standard read-write
* Isolated read-only ports
* Write-only port (not sized for reads)
* Can accommodate foundry bitcells
## Relative Bitcell Sizes (0.35um SCMOS)
| < img height = "184" src = "../assets/images/bitcells/6t.png" > | < img height = "278" src = "../assets/images/bitcells/10t.png" > | < img height = "424" src = "../assets/images/bitcells/dff.png" > |
| :-----------------------------------------------: | :------------------------------------------------: | :--------------------------------------------------: |
| Standard 6T (1rw) 6.8um x 9.2um | Isolated Read 10T (1rw, 1r) 10.9um x 13.9um | DFF 21.9um x 21.2um (from OSU standard cell library) |
## Thin SRAM Bitcells (130nm)
| < img height = "158" src = "../assets/images/bitcells/thin_single.png" > | < img height = "158" src = "../assets/images/bitcells/thin_dual.png" > | < img height = "158" src = "../assets/images/bitcells/thin_single_straps.png" > | < img height = "197" src = "../assets/images/bitcells/thin_dual_straps.png" > |
| :--------------------------------------------------------: | :------------------------------------------------------: | :-----------------------------------------------------------------: | :-------------------------------------------------------------: |
| Single Port 1.2um x 1.58um | Dual Port 2.40um x 1.58um | Single Port (w/ straps & taps) 2.49um x 1.58um | Dual Port (w/ straps & taps) 3.12um x 1.97um |
| < img height = "707" src = "../assets/images/bitcells/dff_reference.png" > |
| :----------------------------------------------------------: |
| DFF (for reference) 5.83um x 7.07 um |
