Thank you for contacting Cypress Semiconductor.
Yes, the Model Numbers have been modified to reflect some changes to the product offering.
The S29PL129J (128Mb) device was deleted from the Ordering Information. Therefore in regards
to the Model Numbers, Model "04" is equal to that of model "00". The package dimension, ball
count and ball assignments are identical for both Model "00" and ,Model "04", as there is no
Hope this helps...