DESCRIPTION

The HEF4515B is a 1-of-16 decoder/demultiplexer, having

four binary weighted address inputs (A0 to A3), a latch

enable input (EL), and an active LOW enable input (E).

The 16 outputs (O0 to O15) are mutually exclusive active

LOW. When EL is HIGH, the selected output is determined

by the data on An. When EL goes LOW, the last data

present at An are stored in the latches and the outputs

remain stable. When E is LOW, the selected output,

determined by the contents of the latch, is LOW. At

E HIGH, all outputs are HIGH. The enable input (E) does

not affect the state of the latch. When the HEF4515B is

used as a demultiplexer, E is the data input and A0 to

A3 are the address inputs.