| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | CD4020BC |  136Kb/6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
 National Semiconductor ... | CD4020BC |  136Kb/6P | 14-Stage Ripple Carry Binary Counters |
| CD4020BCJ |  136Kb/6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
 National Semiconductor ... | CD4020BCN |  136Kb/6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
 National Semiconductor ... | CD4020BCJ |  136Kb/ 6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
 National Semiconductor ... | CD4020BCN |  136Kb/ 6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
 National Semiconductor ... | CD4020BM |  136Kb/ 6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
| CD4020BM |  136Kb/ 6P | 14-Stage Ripple Carry Binary Counters |
| CD4020BMJ |  136Kb/ 6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |
| CD4020BMN |  136Kb/ 6P | 14-Stage, 12-Stage Ripple Carry Binary Counters |