ADV7842KBCZ-5P Datasheet, PDF (12/28 Pages) Analog Devices – Dual HDMI Fast Switching Receiver with 12-Bit, 170 MHz Video and Graphics Digitizer and 3D Comb Filter Decoder

ADV7842
POWER SUPPLY SEQUENCING
POWER-UP SEQUENCE
The recommended power-up sequence of the ADV7842 is as
follows:
1. 3.3 V supplies
2. 2.5 V supply (applies only if using DDR memory)
3. 1.8 V supplies
3.3V
3.3V SUPPLIES
2.5V
2.5V SUPPLIES (IF ANY)
1.8V
1.8V SUPPLIES
3.3V SUPPLIES
POWER-UP
2.5V SUPPLIES 1.8V SUPPLIES
POWER-UP
POWER-UP
Figure 7. Recommended Power-Up Sequence
Notes
Reset should be held low while the supplies are being powered up.
• 3.3 V supplies should be powered up first.
• 2.5 V supply should be powered after the 3.3 V supplies are
established but before the 1.8 V supplies.
• 1.8 V supplies should be powered up last.
The ADV7842 can alternatively be powered up by simulta-
neously asserting all supplies.
In this case, care must be taken to ensure that a lower rated supply
does not go above a higher rated supply level, because the supplies
are being established.
POWER-DOWN SEQUENCE
The ADV7842 supplies can be deasserted simultaneously as
long as a higher rated supply does not go below a lower rated
supply.
Rev. B | Page 12 of 28