Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
AC WAVEFORMS
V
M
= 1.5 V at V
CC
w
2.7 V
V
M
= 0.5
S
V
CC
at V
CC
< 2.7 V
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
VCC
An, E 3
INPUT
GND
t PHL
VOH
Yn OUTPUT
V OL
VM
t PLH
VM
TEST CIRCUIT
V
CC
S
1
2 * V
CC
Open
GND
500Ω
V
I
PULSE
GENERATOR
R
T
D.U.T.
V
O
50pF
C
L
500Ω
SWITCH POSITION
TEST
t
PLH/
t
PHL
S
1
Open
V
CC
< 2.7V
2.7–3.6V
V
I
V
CC
2.7V
SV00557
Figure 1. Input (nA) to output (nY) propagation delays.
SV00903
V CC
E1, E 2
INPUT
GND
t PHL
V OH
Y n OUTPUT
V OL
VM
t PLH
VM
Figure 3. Load circuitry for switching times.
SV00558
Figure 2. 3-State enable and disable times.
1998 Apr 28
6
PHILIPS [ NXP SEMICONDUCTORS ]
