En la figura tenemos un circuito que permite interconectar la lógica TTL con la lógica TTL, pero con total aislamiento de las señales. La velocidad de transmisión de datos se puede adaptar ajustando el valor de Rin y RL. La siguiente tabla proporciona valores para algunas velocidades de datos en función de RL y Rin.
Tabla:
f(max) (kHz)40125150
| RL(ohms) | |
| Rin(ohms) | |
| IF(mA) | |
| 2200 | |
| 1800 | |
| 1,7 | |
| 270 | |
| 390 | |
| 8 | |
| 100 | |
| 180 | |
| 17 |
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