Column select multiplexer circuit for a domino random access memory array

1. A column select multiplexer circuit for a domino random access memory array, comprising:

a plurality of column selector circuits for selecting a plurality of columns of static random access memory cells (SRAM cells), wherein each of said plurality of column selector circuits comprises:

a bitline precharge circuit for precharging a bitline and a bitline bar of a corresponding column of static random access memory cells (SRAM cells), said bitline precharge circuit coupled to said bitline and said bitline bar;

a first access n-type field effect transistor (NFET) coupled to said bitline and to a first node for accessing said bitline;

a second access NFET coupled to said bitline bar and to a second node for accessing said bitline bar;

a column select line coupled to said first and second access transistors that when activated selects said column of SRAM cells for reading and writing of a selected SRAM cell in said corresponding column of SRAM cells.

2. The column select multiplexer circuit of claim 1 , wherein said bitline precharge circuit comprises:

a first p-type field effect transistor (PFET) cross-coupled to a second PFET through a first node coupled to said bitline and through second node coupled to said bitline bar;

a third PFET coupled to said bitline through said first node that when activated by a precharge signal precharges said bitline;

a fourth PFET coupled to said bitline bar through said second node that when activated by said precharge signal precharges said bitline bar.

3. The column select multiplexer circuit of claim 2 , wherein said first access NFET comprises:

a source coupled to said first node;

a gate coupled to said column select line; and

a drain coupled to a column read/write access node.

4. The column select multiplexer circuit of claim 2 , wherein said second access NFET comprises:

a source coupled to said second node;

a gate coupled to said column select line; and

a drain coupled to a column bar read/write access node.

5. The column select multiplexer circuit of claim 1 , wherein said plurality of column selector circuits accesses at least eight columns of SRAM cells.

6. A column select multiplexer circuit for a domino random access memory array, comprising:

a first transistor coupled to a bitline of a first column of static random access memory cells (SRAM cells) and to a bitline precharge line for precharging said bitline;

a second transistor coupled to a bitline bar of said first column of SRAM cells and to said bitline precharge line for precharging said bitline bar;

a third transistor cross-coupled to a fourth transistor and coupled between said first and second transistors;

a first access transistor coupled to said bitline for read/write access of said bitline;

a second access transistor coupled to said bitline bar for read/write access of said bitline bar; and

a first column select line coupled to said first and second access transistors that when activated selects said first column of SRAM cells from a plurality of columns of SRAM cells each of which are selectable by said column select multiplexer circuit.

7. The column select multiplexer circuit of claim 6 , wherein said first, second, third, and fourth transistors comprise a p-type field effect transistor (PFET).

8. The column select multiplexer circuit of claim 6 , wherein said first access transistor and said second access transistor comprise a n-type field effect transistor (NFET).

9. The column select multiplexer circuit of claim 6 , further comprising:

a fourth transistor coupled to a bitline of a second column of SRAM cells and to said bitline precharge line for precharging said bitline of said second column of SRAM cells;

a fifth transistor coupled to a bitline bar of said second column of SRAM cells and to said bitline precharge line for precharging said bitline bar of said second column of SRAM cells;

a third access transistor coupled to said bitline for read/write access of said bitline of said second column of SRAM cells;

a fourth access transistor coupled to said bitline bar for read/write access of said bitline bar of said second column of SRAM cells; and

a second column select line coupled to said third and fourth access transistors that when activated selects said second column of SPAM cells from said plurality of columns of SRAM cells.