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SN74ABT646ADW Datasheet(Fiches technique) 7 Page - Texas Instruments

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Numéro de pièce SN74ABT646ADW
Description  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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SN54ABT646A, SN74ABT646A
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3STATE OUTPUTS
SCBS069H − JULY 1991 − REVISED MAY 2004
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 2)
SN74ABT646A
VCC = 5 V,
TA = 25°C
MIN
MAX
UNIT
MIN
MAX
MIN
MAX
fclock
Clock frequency
125
125
MHz
tw
Pulse duration, CLK high or low
4
4
ns
tsu
Setup time, A or B before CLKAB
↑ or CLKBA↑
3
3
ns
th
Hold time, A or B after CLKAB
↑ or CLKBA↑
0
0
ns
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Figure 2)
SN54ABT646A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
MIN
MAX
UNIT
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
fmax
125
125
MHz
tPLH
CLKBA or CLKAB
A or B
2.2
4
5.1
2.2
6.7
ns
tPHL
CLKBA or CLKAB
A or B
1.7
4
5.1
1.2
6.7
ns
tPLH
A or B
B or A
1.5
3
4.3
1.5
5
ns
tPHL
A or B
B or A
1.5
3.3
4.6
1.5
5.6
ns
tPLH
SAB or SBA†
B or A
1.5
4
5.7
1.5
7.8
ns
tPHL
SAB or SBA†
B or A
1.5
3.6
4.9
1.5
6.2
ns
tPZH
OE
A or B
1.5
4.3
5.3
1.5
7
ns
tPZL
OE
A or B
3
5.8
8
3
10.5
ns
tPHZ
OE
A or B
1.5
3.5
5.8
1
7.3
ns
tPLZ
OE
A or B
1.5
3
4
1.5
5.7
ns
tPZH
DIR
A or B
1.5
4.5
5.7
1.5
7.3
ns
tPZL
DIR
A or B
2.5
6.5
9
2.5
11
ns
tPHZ
DIR
A or B
1.5
3.8
6.5
1
9
ns
tPLZ
DIR
A or B
1.5
3.8
4.7
1.2
6.7
ns
† These parameters are measured with the internal output state of the storage register opposite that of the bus input.




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