Datasheet

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Power-Up Considerations
(1)
SN74ALVC164245-EP
16-BIT 2.5-V TO 3.3-V/3.3-V TO 5-V LEVEL-SHIFTING TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS774A – JUNE 2004 – REVISED SEPTEMBER 2005
TI level-translation devices offer an opportunity for successful mixed-voltage signal design. A proper power-up
sequence always should be followed to avoid excessive supply current, bus contention, oscillations, or other
anomalies caused by improperly biased device pins. To guard against such power-up problems, take these
precautions:
1. Connect ground before any supply voltage is applied.
2. Power up the control side of the device (V
CCA
for all four of these devices).
3. Tie OE to V
CCA
with a pullup resistor so that it ramps with V
CCA
.
4. Depending on the direction of the data path, DIR can be high or low. If DIR high is needed (A data to B bus),
ramp it with V
CCA
. Otherwise, keep DIR low.
(1) Refer to the TI application report, Texas Instruments Voltage-Level-Translation Devices, literature number SCEA021.
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