S-4520BA и другие
| Компонент | Описание | Производитель | |
| 4520B | DUAL 4-BIT BINARY COUNTER |
Intel Corporation |
 |
| ADR4520BRZ | Ultralow Noise, High Accuracy |
Analog Devices |
|
| ADR4520BRZ-R7 | Ultralow Noise, High Accuracy |
Analog Devices |
|
| CD4520B | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BE | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BF | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BF3A | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BM | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BM96 | CMOS DUAL UP-COUNTERS |
Texas Instruments |
|
| CD4520BMS | CMOS Dual Up Counters |
Intersil Corporation |
|