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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. | HEF4520BD | Dual binary counter | PHLPS | SOT74 | - | - | - | 64K |
| 2. | HEF4520BP | Dual binary counter | PHLPS | SOT38 | - | - | - | 64K |
| 3. | HEF4520BPB | Dual binary counter | PHLPS | SOT38 | - | - | - | 64K |
| 4. | HEF4520BPB | Dual binary counter | PHLPS | SOT38 | - | - | - | 64K |
| 5. | HEF4520BT | Dual binary counter | PHLPS | SOT109 | - | - | - | 64K |
| 6. | HEF4520BU | Dual binary counter | PHLPS | - | - | - | - | 64K |
| 7. | HEF4521BD | 24-stage frequency divider and oscillator | PHLPS | SOT74 | - | - | - | 159K |
| 8. | HEF4521BDB | 24-stage frequency divider and oscillator | PHLPS | SOT74 | - | - | - | 159K |
| 9. | HEF4521BP | 24-stage frequency divider and oscillator | PHLPS | SOT38 | - | - | - | 159K |
| 10. | HEF4521BPB | 24-stage frequency divider and oscillator | PHLPS | SOT38 | - | - | - | 159K |
| 11. | HEF4521BT | 24-stage frequency divider and oscillator | PHLPS | SOT109 | - | - | - | 159K |
| 12. | HEF4521BU | 24-stage frequency divider and oscillator | PHLPS | - | - | - | - | 159K |
| 13. | HEF4526BD | Programmable 4-bit binary down counter | PHLPS | SOT74 | - | - | - | 109K |
| 14. | HEF4526BDB | Programmable 4-bit binary down counter | PHLPS | SOT74 | - | - | - | 109K |
| 15. | HEF4526BP | Programmable 4-bit binary down counter | PHLPS | SOT38 | - | - | - | 109K |
| 16. | HEF4526BPB | Programmable 4-bit binary down counter | PHLPS | SOT38 | - | - | - | 109K |
| 17. | HEF4526BPB | Programmable 4-bit binary down counter | PHLPS | SOT38 | - | - | - | 109K |
| 18. | HEF4526BT | Programmable 4-bit binary down counter | PHLPS | SOT109 | - | - | - | 109K |
| 19. | HEF4526BU | Programmable 4-bit binary down counter | PHLPS | - | - | - | - | 109K |
| 20. | HEF4528BD | Dual monostable multivibrator | PHLPS | SOT74 | - | - | - | 104K |
