Low voltage memory device

1. A memory device, comprising:

a memory cell comprising:

a transmission gate;

a cross-coupled inverter circuit operably connected to the transmission gate, the cross-coupled inverter comprising a first tri-state inverter cross-coupled to an inverter; and

a second tri-state inverter operably connected to an output of the inverter in the cross-coupled inverter circuit;

a select circuit, wherein an output of the select circuit is operably connected to a first bit line associated with the memory cell; and

a memory cell storage device, wherein:

an input of the memory cell storage device is operably connected to a second bit line associated with the memory cell; and

an output of the memory cell storage device is operably connected to an input of the select circuit.

2. The memory device of claim 1 , wherein the memory device comprises a static random-access memory device.

3. The memory device of claim 1 , wherein the transmission gate and the cross-coupled inverter circuit comprise a write port and the second tri-state inverter comprises a read port.

4. The memory device of claim 3 , wherein:

the transmission gate comprises an n-type transistor operably connected in parallel to a p-type transistor;

the first tri-state inverter comprises two p-type transistors connected in series and two n-type transistors connected in series, wherein the two p-type transistors and the two n-type transistors are connected in series;

the inverter comprises a p-type transistor connected in series with an n-type transistor; and

the second tri-state inverter comprises two p-type transistors connected in series and two n-type transistors connected in series, wherein the two p-type transistors and the two n-type transistors are connected in series.

5. The memory device of claim 4 , wherein one or more threshold voltages of the n-type and the p-type transistors in the write port differ from one or more threshold voltages of the n-type and the p-type transistors in the read port.

6. The memory device of claim 1 , wherein:

the input of the select circuit comprises a first input of the select circuit; and

the memory device further comprises:

an input storage device for storing input data to be written to the memory cell;

a mask storage device for storing mask data indicating whether a write operation to the memory cell is to be masked; and

an output storage device, wherein:

the output of the memory cell storage device is operably connected to an input of the output storage device;

an output of the input storage device is operably connected to a second input of the select circuit; and

an output of the mask storage device is operably connected to a select input of the select circuit.

7. The memory device of claim 6 , wherein the input storage device, the memory cell storage device, the mask storage device, and the output storage device each comprises a latch circuit and the select circuit comprises a multiplexer.

8. The memory device of claim 6 , further comprising a driver circuit, wherein an input of the driver circuit is operably connected to the output of the input storage device and an output of the driver circuit is operably connected to the input of the memory cell storage device.

9. The memory device of claim 1 , wherein:

the memory cell is included in a memory array, the memory array comprising a plurality of memory cells grouped into multiple sub-arrays, wherein each sub-array includes a subset of memory cells;

a plurality of local read bit lines, wherein each local read bit line is operably connected to the subset of memory cells in a respective sub-array; and

a global read bit line, wherein the plurality of local read bit lines is operably connected to the global read bit line.

10. The memory device of claim 1 , wherein:

the select circuit comprises a first select circuit; and

the memory device further comprises:

a second select circuit; and

a logic circuit, wherein:

an input of the second select circuit is operably connected to the output of the memory cell storage device;

an output of the logic circuit is operably connected to a select input of the first select circuit;

a first input of the logic circuit is operably connected to a column select signal line;

a second input of the logic circuit is operably connected to a mask data input; and

the column select signal line is operably connected to a select input of the second select circuit.

11. The memory device of claim 10 , wherein the first and the second select circuits each comprise a multiplexer, the logic circuit comprises an AND circuit, and the memory cell storage device comprises a latch circuit.

12. A system, comprising:

one or more processing devices; and

at least one memory storing instructions, that when executed by the one or more processing devices, cause operations to be performed, the operations comprising:

based on an address, reading data from a memory cell associated with the address;

storing the data in a first storage device;

receiving input data to be written to the memory cell;

storing the input data in a second storage device;

receiving mask data associated with the memory cell, the mask data indicating whether a write operation is to be a masked write operation or an unmasked write operation;

when the mask data indicates the write operation is a masked write operation, receiving the data stored in the first storage device and writing the data to the memory cell; and

when the mask data indicates the write operation is an unmasked write operation, receiving the input data stored in the second storage device and writing the input data to the memory cell.

13. The system of claim 12 , wherein the at least one memory stores further instructions for storing the mask data in a third storage device.

14. The system of claim 13 , wherein the first storage device, the second storage device, and the third storage device each comprise a latch circuit.

15. An electronic device, comprising:

a processing device; and

a memory device operably connected to the processing device, the memory device comprising:

a memory cell, comprising:

a transmission gate;

a cross-coupled inverter circuit operably connected to the transmission gate, the cross-coupled inverter comprising a first tri-state inverter cross-coupled to an inverter; and

a second tri-state inverter operably connected to an output of the inverter in the cross-coupled inverter circuit;

a select circuit, wherein an output of the select circuit is operably connected to a first bit line associated with the memory cell; and

a memory cell storage device for storing data read from the memory cell, wherein:

an input of the memory cell storage device is operably connected to a second bit line associated with the memory cell; and

an output of the memory cell storage device is operably connected to an input of the select circuit.

16. The electronic device of claim 15 , wherein the memory device comprises a static random-access memory device.

17. The electronic device of claim 15 , wherein the memory cell comprises a twelve transistor memory cell.

18. The electronic device of claim 17 , wherein:

the transmission gate and the cross-coupled inverter circuit comprise a write port;

the second tri-state inverter comprises a read port; and

one or more threshold voltages of transistors in the write port differ from one or more threshold voltages of transistors in the read port.

19. The electronic device of claim 15 , wherein:

the input of the select circuit comprises a first input of the select circuit; and

the memory device further comprises:

an input storage device for storing input data to be written to the memory cell;

a mask storage device for storing mask data indicating whether a write operation to the memory cell is to be masked; and

an output storage device, wherein:

the output of the memory cell storage device is operably connected to an input of the output storage device;

an output of the input storage device is operably connected to a second input of the select circuit; and

an output of the mask storage device is operably connected to a select input of the select circuit.

20. The electronic device of claim 15 , wherein:

the select circuit comprises a first select circuit; and

the memory device further comprises:

a second select circuit; and

a logic circuit, wherein:

an input of the second select circuit is operably connected to the output of the memory cell storage device;

an output of the logic circuit is operably connected to a select input of the first select circuit;

a first input of the logic circuit is operably connected to a column select signal line; a second input of the logic circuit is operably connected to a mask data input; and

the column select signal line is operably connected to a select input of the second select circuit.