Datasheet

September 1993 7
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting 74HC/HCT138
AC WAVEFORMS
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines” .
Fig.6 Waveforms showing the address input (A
n
) and enable input (E
3
) to output (Y
n
) propagation delays and
the output transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.7 Waveforms showing the enable input (E
n
) to output (Y
n
) propagation delays and the output transition
times.
(1) HC : V
M
= 50%; V
I
= GND to V
CC
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.