| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| HEF4021BP | 8-bit static shift register | Philips-Semiconductors | SOT38 | - | - | - | 70 K |
| HEF4021BT | 8-bit static shift register | Philips-Semiconductors | SOT109 | - | - | - | 70 K |
| HEF4021BU | 8-bit static shift register | Philips-Semiconductors | - | - | - | - | 70 K |
| HEF4021BU | 8-bit static shift register | Philips-Semiconductors | - | - | - | - | 70 K |
| HEF4521BD | 24-stage frequency divider and oscillator | Philips-Semiconductors | SOT74 | - | - | - | 159 K |
| HEF4521BDB | 24-stage frequency divider and oscillator | Philips-Semiconductors | SOT74 | - | - | - | 159 K |
| HEF4521BP | 24-stage frequency divider and oscillator | Philips-Semiconductors | SOT38 | - | - | - | 159 K |
| HEF4521BPB | 24-stage frequency divider and oscillator | Philips-Semiconductors | SOT38 | - | - | - | 159 K |
| HEF4521BT | 24-stage frequency divider and oscillator | Philips-Semiconductors | SOT109 | - | - | - | 159 K |
| HEF4521BU | 24-stage frequency divider and oscillator | Philips-Semiconductors | - | - | - | - | 159 K |
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