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SN74ALS137ADE4 数据表(PDF) 4 Page - Texas Instruments

部件名 SN74ALS137ADE4
功能描述  3-LINE TO 8-LINE DECODERS/DEMILTIPLEXERS WITH ADDRESS LATCHES
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74ALS137ADE4 数据表(HTML) 4 Page - Texas Instruments

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SN54ALS137A, SN74ALS137A, SN74AS137
3LINE TO 8LINE DECODERS/DEMULTIPLEXERS
WITH ADDRESS LATCHES
SDAS203C − APRIL 1982 − REVISED JANUARY 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 Ω,
TA = MIN to MAX†
UNIT
PARAMETER
(INPUT)
(OUTPUT)
SN54ALS137A
SN74ALS137A
UNIT
MIN
MAX
MIN
MAX
tPLH
A, B, C
Y
5
25
5
20
ns
tPHL
A, B, C
Y
6
25
6
20
ns
tPLH
G2
Y
4
15
3
12
ns
tPHL
G2
Y
5
18
4
15
ns
tPLH
G1
Y
5
21
4
17
ns
tPHL
G1
Y
5
19
4
15
ns
tPLH
LE
Y
7
27
6
22
ns
tPHL
LE
Y
7
25
7
20
ns
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN74AS137
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
−65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74AS137
UNIT
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
−2
mA
IOL
Low-level output current
20
mA
tw
Pulse duration, LE low
6.5
ns
tsu
Setup time at A, B, and C before LE
4
ns
th
Hold time at A, B, and C after LE
1
ns
TA
Operating free-air temperature
0
70
°C


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