| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | CD4011BC |  167Kb/6P | Quad 2-Input NOR,NAND Buffered B Series Gate |
| CD4011BC |  164Kb/6P | Quad 2-Input NOR(NAND) Buffered B Series Gate |
| CD4011BCJ |  167Kb/6P | Quad 2-Input NOR,NAND Buffered B Series Gate |
 National Semiconductor ... | CD4011BCN |  167Kb/6P | Quad 2-Input NOR,NAND Buffered B Series Gate |
 National Semiconductor ... | CD4011BCJ |  167Kb/ 6P | Quad 2-Input NOR,NAND Buffered B Series Gate |
 National Semiconductor ... | CD4011BCN |  167Kb/ 6P | Quad 2-Input NOR,NAND Buffered B Series Gate |