參數(shù)資料
型號: 74LV139
廠商: NXP Semiconductors N.V.
英文描述: Dual 2-to-4 line decoder/demultiplexer
中文描述: 雙路2至4線譯碼器/解復(fù)用器
文件頁數(shù): 6/12頁
文件大?。?/td> 111K
代理商: 74LV139
Philips Semiconductors
Product specification
74LV139
Dual 2-to-4 line decoder/demultiplexer
1998 Apr 28
6
AC CHARACTERISTICS
GND = 0V; t
r
= t
f
2.5ns; C
L
= 50pF; R
L
= 1K
CONDITION
LIMITS
SYMBOL
PARAMETER
WAVEFORM
–40 to +85
°
C
TYP
1
70
–40 to +125
°
C
MIN
UNIT
V
CC
(V)
1.2
MIN
MAX
MAX
Propagati
nA
n
to Y
n
d l
2.0
24
31
39
t
PHL/
t
PLH
Figures 1, 2
2.7
18
13
2
23
29
ns
3.0 to 3.6
18
23
4.5 to 5.5
15
19
1.2
60
Propagati
nE to Y
n
d l
2.0
20
27
34
t
PHL/
t
PLH
Figures 1, 2
2.7
15
11
2
20
25
ns
3.0 to 3.6
16
20
4.5 to 5.5
13
16
NOTES:
1. Unless otherwise stated, all typical values are measured at T
amb
= 25
°
C
2. Typical values are measured at V
CC
= 3.3 V.
AC WAVEFORMS
V
M
= 1.5 V at V
CC
2.7 V and
3.6 V;
V
M
= 0.5 V
×
V
CC
at V
CC
<
2.7 V and
4.5 V.
V
OL
and V
OH
are the typical output voltage drop that occur with the
output load.
SV00535
V
M
nA
n
INPUT
nY
n
OUTPUT
V
M
t
PLH
t
PHL
GND
V
l
V
OL
V
OH
Figure 1.
Address input (nA
n
) to output (nYn)
propagation delays.
SV00536
V
M
nE INPUT
nY
n
OUTPUT
V
M
t
PLH
t
PHL
GND
V
l
V
OL
V
OH
Figure 2.
Enable input (nE) to output (nY
n
)
propagation delays.
TEST CIRCUIT
PULSE
GENERATOR
R
T
V
l
D.U.T.
V
O
C
L
R
L
= 1k
V
cc
Test Circuit for Outputs
DEFINITIONS
R
L
= Load resistor
C
L
= Load capacitance includes jig and probe capacitiance
R
T
= Termination resistance should be equal to Z
OUT
of pulse generators.
V
CC
V
I
< 2.7V
2.7–3.6V
V
CC
2.7V
TEST
t
PLH/
t
PHL
4.5 V
V
CC
50pF
SV00902
Figure 3.
Load circuitry for switching times.
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