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SN54ABT843 Datasheet(Fiches technique) 5 Page - Texas Instruments

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Numéro de pièce SN54ABT843
Description  9-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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SN54ABT843, SN74ABT843
9-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS197D – FEBRUARY 1991 – REVISED MAY 1997
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figures 1 and 2)
VCC = 5 V,
TA = 25°C
SN54ABT843
SN74ABT843
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
CLR low
5.5
5.5
5.5
tw
Pulse duration
PRE low
4.5
4.5
4.5
ns
LE low
3.3
3.3
3.4
Data before LE
Low
2.5
2.5
2.5
t
Setup time
Data before LE
High
3
3
3
ns
tsu
Setup time
PRE inactive
1.6
1.6
1.6
ns
CLR inactive
2
2
2
th
Hold time data after LE
High
1
1
1
ns
th
Hold time, data after LE
Low
1.5†
2.3†
1.5†
ns
† This data sheet limit may vary among suppliers.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Figures 1 and 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
SN54ABT843
SN74ABT843
UNIT
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
D
Q
1.2†
3.8
5.2
1.2†
7.8
1.2†
6.7†
ns
tPHL
D
Q
1.5†
3.4
6.3
1.5†
7.3
1.5†
7.2
ns
tPLH
LE
Q
1.7†
4.4
5.6
1.7†
8.3
1.7†
7.2†
ns
tPHL
LE
Q
1.9†
4.1
6.3
1.3†
7.2
1.9†
6.9
ns
tPLH
PRE
Q
2.2
5
6.2
2.2
8.3
2.2
7.4
ns
tPHL
PRE
Q
2.1†
4.1
6.5
2.1†
7.5
2.1†
7.2
ns
tPLH
CLR
Q
2†
4.4
6.3
2†
7.6
2†
7.1
ns
tPHL
CLR
Q
1.9†
4.5
6.8
1.9†
8.1
1.9†
8
ns
tPZH
OE
Q
1
3.4
4.5†
1
6.4
1
5.7†
ns
tPZL
OE
Q
2
4.3
5.7†
2
6.6
2
6.5
ns
tPHZ
OE
Q
2.4†
4.9
6.2
2.4†
7.3
2.4†
6.8
ns
tPLZ
OE
Q
1.5†
4.2
6.3
1.5†
7
1.5†
5.9†
ns
† This data sheet limit may vary among suppliers.




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