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How the I2C Bus Works - EEWeb

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I 2 C Product Characteristics<br />

• Package Offerings<br />

Typically DIP, SO, SSOP,<br />

TSSOP and/or HVQFN packages<br />

• Frequency Range<br />

Older devices 100 kHz operation<br />

Newer devices operating up to 400 kHz<br />

• Operating Supply Voltage Range<br />

2.3 to 5.5 V or<br />

3.0 to 3.6 V with 5 V tolerance<br />

• Operating temperature range<br />

Typically -40 to +85 ºC<br />

Some 0 to +70 ºC<br />

• Hardware address pins<br />

Typically three (A O, A 1, A 2) are provided to allow up to eight of <strong>the</strong><br />

identical device on <strong>the</strong> same I 2 C bus but sometimes due to pin<br />

limitations <strong>the</strong>re are fewer address pins<br />

4 mm x 4 mm<br />

24 pin 16-bit 16 bit PCA9555 shown<br />

Semiconductors 15

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