74AHCT138D 데이터 시트보기 (PDF) - Philips Electronics
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74AHCT138D Datasheet PDF : 16 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer; inverting
AC WAVEFORMS
Product specification
74AHC138;
74AHCT138
handbook, halfpageVCC
An, E3
INPUT
GND
tPHL
VOH
Yn
VOL
VM(1)
VM(1)
tPLH
MNA373
handbook, halfpageVCC
E1, E2
INPUT
GND
tPHL
VOH
Yn
VOL
VM(1)
VM(1)
tPLH
MNA374
FAMILY
VI INPUT
REQUIREMENTS
VM(1)
INPUT
VM(1)
OUTPUT
AHC
AHCT
GND to VCC
GND to 3.0 V
50% VCC 50% VCC
1.5 V
50% VCC
Fig.5 The address input (An) and enable input
(E3) to output (Yn) propagation delays.
FAMILY
VI INPUT
REQUIREMENTS
VM(1)
INPUT
VM(1)
OUTPUT
AHC
AHCT
GND to VCC
GND to 3.0 V
50% VCC 50% VCC
1.5 V
50% VCC
Fig.6 The enable input (E1, E2) to output (Yn)
propagation delays.
handbook, full pagewidth
PULSE
VI
GENERATOR
VCC
VO
D.U.T.
RT
S1
1000 Ω
VCC
open
GND
CL
MNA219
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
open
VCC
GND
1999 Sep 27
Fig.7 Load circuitry for switching times.
10
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