Packages

In the uPD780021, a reading of 20% from the humidity indicator corresponds to "WARNING", and a reading of 40% corresponds to "EXAMINE", but which is associated with the highest danger level?

While purely a rough guide for humidity, when the humidity is 40% and the indicator is pink, pre-baking is required.
Even exposure to the 20% level for a long time will cause humidity absorption to progress, so pre-baking is recommended in the case of a long storage period.
Furthermore, this indicator is designed for checking the humidity in an unopened state.
Thus its reading after the dry pack has been opened is not valid.

What is the difference between the GK-BE9 package and new package?

The differences between the BE9 package and the 9EU package are that the package is slightly thinner and the bending (angle) of the leads has been changed a little.

Which package of the following three types is used for the uPD789316GK-XXX-9ET ?

(2) JEDEC type