User's Manual

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 85 / 94
8 Storage, Manufacturing and
Packaging
8.1. Storage
EC21 is stored in a vacuum-sealed bag. The storage restrictionsareshown as below.
1. Shelf life in thevacuum-sealed bag: 12 months at <40ºC/90%RH.
2. After the vacuum-sealed bagis opened, devices that will be subjected to reflow soldering or other high
temperature processes must be:
 Mounted within 72 hours at the factory environment of ≤30ºC/60%RH
 Stored at <10%RH
3. Devices require baking before mounting, if any circumstances below occurs:
 When the ambient temperature is 23ºC±5ºC and the humidity indicator card shows the humidity
is>10% before opening the vacuum-sealed bag.
 Device mounting cannot be finished within 72 hours at factory conditions of ≤30ºC/60%RH.
4. If baking is required, devices may be baked for 48 hours at 125ºC±5ºC.
As the plastic packagecannot be subjected to high temperature, it should be removed from devices before
high temperature (125ºC) baking. If shorter baking time is desired, please refer to IPC/JEDECJ-STD-033
for bakingprocedure.
NOTE