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Power-Up Considerations

SN74AVC1T45

SINGLE-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SCES530D – DECEMBER 2003 – REVISED NOVEMBER 2005

A proper power-up sequence always should be followed to avoid excessive supply current, bus contention,

oscillations, or other anomalies. To guard against such power-up problems, take the following precautions:

1. Connect ground before any supply voltage is applied.

UNIT

0 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

0 V

0

<0.5

<0.5

<0.5

<0.5

<0.5

1.2 V

<0.5

<1

<1

<1

<1

1

1.5 V

<0.5

<1

<1

<1

<1

1

µA

1.8 V

<0.5

<1

<1

<1

<1

<1

2.5 V

<0.5

1

<1

<1

<1

<1

3.3 V

<0.5

1

<1

<1

<1

<1

9