| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| 74HC4518N | Dual synchronous BCD counter | Philips-Semiconductors | SOT38 | - | - | - | 63 K |
| 74HC4518U | Dual synchronous BCD counter | Philips-Semiconductors | - | - | - | - | 63 K |
| 74HC4518U | Dual synchronous BCD counter | Philips-Semiconductors | - | - | - | - | 63 K |
| 74HC4520D | Dual 4-bit synchronous binary counter | Philips-Semiconductors | SOT109 | - | - | - | 55 K |
| 74HC4520DB | Dual 4-bit synchronous binary counter | Philips-Semiconductors | SOT338 | - | - | - | 55 K |
| 74HC4520N | Dual 4-bit synchronous binary counter | Philips-Semiconductors | SOT38 | - | - | - | 55 K |
| 74HC4520PW | Dual 4-bit synchronous binary counter | Philips-Semiconductors | SOT403 | - | - | - | 55 K |
| 74HC4520U | Dual 4-bit synchronous binary counter | Philips-Semiconductors | - | - | - | - | 55 K |
| 74HC4538DB | Dual retriggerable precision monostable multivibrator | Philips-Semiconductors | SOT338 | - | - | - | 149 K |
| 74HC4538N | Dual retriggerable precision monostable multivibrator | Philips-Semiconductors | SOT38 | - | - | - | 149 K |
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