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SN74ALS642A-1: About SN74ALS642A-1 Orderble Device

Part Number: SN74ALS642A-1

I am using the SN74ALS642A-1DB,but why is the Orderble Device(PACKAGING INFORMATION) not listed in the data sheet?

 

Datasheet

www.ti.com/.../sn74als642a-1.pdf