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How the I2C Bus Works - EEWeb

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Changing I 2 C bus signals for Opto-isolation<br />

3.3/5V<br />

SCL<br />

3.3/5V<br />

SDA<br />

P82B96<br />

• Low cost Optos can be<br />

directly driven (10-30mA)<br />

• Controlling equipment on phone lines<br />

Vcc 1 Vcc 2 SCL<br />

4N36 Optos for ~5kHz<br />

6N137 for 100kHz<br />

HCPL-060L for 400 kHz<br />

• AC Mains switches, lamp dimmers, power supplies<br />

• Isolating medical or industrial equipment<br />

Semiconductors 79<br />

SDA

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