Hi,
If you need 1 to 16 demultiplexer then why not use 74154 4 to 16 demultiplexer ? No need to use two 8 outputs demultiplexer. It is easy to implement.
Chers,
Firat,
Yes I agree to the previous post.Going with 1:16 would be better.
Still to answer your question, options are:
74138 Demux (1:8) (Inverted Input)
74154 Demux (1:16) (Inverted Input)
FYI
74159 Demux (1:16) (same as Input)
Hope this helps!!