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SN74ALS191AD Datasheet(PDF) 5 Page - Texas Instruments

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Part # SN74ALS191AD
Description  SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SN74ALS191AD Datasheet(HTML) 5 Page - Texas Instruments

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SN54ALS191A, SN74ALS191A
SYNCHRONOUS 4BIT UP/DOWN BINARY COUNTERS
SDAS210C − DECEMBER 1982 − REVISED JULY 1996
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
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: SN54ALS191A
−55
°C to 125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS191A
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
−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
SN54ALS191A
SN74ALS191A
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.7
0.8
V
IOH
High-level output current
− 0.4
− 0.4
mA
IOL
Low-level output current
4
8
mA
fclock
Clock frequency
0
20
0
30
MHz
tw
Pulse duration
CLK high or low
20
16.5
ns
tw
Pulse duration
LOAD low
25
20
ns
Data before LOAD
25
20
tsu
Setup time
CTEN before CLK
45
20
ns
tsu
Setup time
D/U before CLK
30
20
ns
LOAD inactive before CLK
20
20
Data after LOAD
5
5
th
Hold time
CTEN after CLK
0
0
ns
D/U after CLK
0
0
ns
TA
Operating free-air temperature
−55
125
0
70
°C


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