Did you find a datasheet for the 2nd part?
http://www.datasheetarchive.com/pdf/getfile.php?dir=Datasheets-39&file=DSA-761486.pdf&scan=
Latched 1 of 16 selecter - you give it 4 address bits, it will create a low on 1 of 16 outputs, and can latch it with another control line. Nice part. Cannot sink or source much current, so is really limited to connecting to other logic devices.