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Power-Up Considerations

SN74LVC1T45

SINGLE-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SCES515H – DECEMBER 2003 – REVISED JANUARY 2007

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

1.8 V

2.5 V

3.3 V

5 V

0 V

0

<1

<1

<1

<1

1.8 V

<1

<2

<2

<2

2

2.5 V

<1

<2

<2

<2

<2

µA

3.3 V

<1

<2

<2

<2

<2

5 V

<1

2

<2

<2

<2

8

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