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Tell me about the power-up sequence and signal input timing for dual-supply level shifters?

For example, see the figure shown below.

Power up VCCB first since the VCCB domain contains control circuitry.

VCCA must be powered up at the same time as or after VCCB.

The input signals must be applied to (1B1 - 1B8) after the control signals (/OE and DIR) are set to appropriate values.

Example

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