Dry Packing Requirement
All Espressif chip’s moisture sensitivity level (MSL) is 3, thus must be dry-packed. Dry packing usually consists of desiccant material, a humidity-indicator card (HIC), as well as a Moisture Sensitivity Caution Label sealed with the populated reel inside a moisture barrier bag (MBB).
Moisture Sensitivity Caution Label
Humidity-indicator Card
Desiccant
Note
The figure(s) above is for illustration purposes only. Actual product may vary.
The floor life (the allowable period of time, after removal from a moisture barrier bag, dry storage or dry bake and before the reflow soldering process) is shown in the table below.
Level |
Floor life (out of bag) at factory ambient ≤ 30℃/60% RH, or as stated |
|---|---|
3 |
168 hours |
- Products require bake, before mounting, if:
The humidity-indicator card reads > 10%, when reading at 23 ± 5℃;
Or the period of time after removal from a moisture barrier bag or dry storage or dry bake and before the reflow soldering process is larger than the value listed in table above.
If baking is required, make sure that the products are taken out of the tape, and IPC/JEDEC J-STD-033 is followed during the bake procedure.