74139 - (2x) Decoder / Demultiplexer, 2 to 4

symbol

www.NanoBob.com 2 A0 3 A1 1 E 4 Y0 5 Y1 6 Y2 7 Y3

function table

EA1A0 Y3Y2Y1Y0
HXX HHHH
LLL HHHL
LLH HHLH
LHL HLHH
LHH LHHH

pin types

0 digital input (inverted) 0 digital output (inverted) 0 digital input-output (bidir) 0 analog (input or output) 0 positive power 0 ground 0 negative power