| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| HEF4522BD | Programmable 4-bit BCD down counter | Philips-Semiconductors | DIL | 16 | - | - | 107 K |
| HEF4522BP | Programmable 4-bit BCD down counter | Philips-Semiconductors | DIL | 16 | - | - | 107 K |
| HEF4522BT | Programmable 4-bit BCD down counter | Philips-Semiconductors | SO | 16 | - | - | 107 K |
| HEF4528BDB | Dual monostable multivibrator | Philips-Semiconductors | SOT74 | - | - | - | 104 K |
| HEF4528BP | Dual monostable multivibrator | Philips-Semiconductors | SOT38 | - | - | - | 104 K |
| HEF4528BPB | Dual monostable multivibrator | Philips-Semiconductors | SOT38 | - | - | - | 104 K |
| HEF4528BT | Dual monostable multivibrator | Philips-Semiconductors | SOT109 | - | - | - | 104 K |
| HEF4528BT | Dual monostable multivibrator | Philips-Semiconductors | SOT109 | - | - | - | 104 K |
| HEF4528BU | Dual monostable multivibrator | Philips-Semiconductors | - | - | - | - | 104 K |
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