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74LVC138A Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. 74LVC138A
Description  3-to-8 line decoder/demultiplexer; inverting
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 6 page
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Philips Semiconductors
Product specification
74LVC138A
3-to-8 line decoder/demultiplexer; inverting
1998 Apr 28
6
AC WAVEFORMS
VM = 1.5 V at VCC w 2.7 V
VM = 0.5 S VCC at VCC < 2.7 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
SV00557
V M
A n, E 3
INPUT
VCC
GND
VOL
VOH
Yn OUTPUT
V M
t PLH
t PHL
Figure 1.
Input (nA) to output (nY) propagation delays.
SV00558
V M
E 1, E 2
INPUT
Y n OUTPUT
V M
tPLH
tPHL
V CC
GND
V OL
V OH
Figure 2.
3-State enable and disable times.
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VI
D.U.T.
VO
CL
VCC
500
Open
GND
S1
VCC
VI
< 2.7V
VCC
TEST
S1
tPLH/tPHL
Open
2.7V
2.7–3.6V
50pF
500
2 * VCC
SV00903
Figure 3.
Load circuitry for switching times.




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