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SN74ALS642A-1DWE4 датащи(PDF) 4 Page - Texas Instruments

номер детали SN74ALS642A-1DWE4
подробное описание детали  OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS
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SN74ALS642A-1DWE4 датащи(HTML) 4 Page - Texas Instruments

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SN74ALS641A, SN74ALS642A, SN74AS641
OCTAL BUS TRANSCEIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS300 – MARCH 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI: All inputs and I/O ports
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN74AS641
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
SN74AS641
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
VOH
High-level output voltage
5.5
V
IOL
Low-level output current
64
mA
TA
Operating free-air temperature
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AS641
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP‡
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
V
IOH
VCC = 4.5 V,
VOH = 5.5 V
0.1
mA
VOL
VCC = 4.5 V,
IOL = 64 mA
0.35
0.55
V
II
Control inputs
VCC =5 5V
VI = 7 V
0.1
mA
II
A or B ports
VCC = 5.5 V
VI = 5.5 V
0.1
mA
IIH
Control inputs
VCC =5 5V
VI =2 7V
20
µA
IIH
A or B ports§
VCC = 5.5 V,
VI = 2.7 V
70
µA
IIL
Control inputs
VCC =5 5V
VI =0 4V
– 0.5
mA
IIL
A or B ports§
VCC = 5.5 V,
VI = 0.4 V
– 0.75
mA
ICC
VCC =5 5V
Outputs high
50
82
mA
ICC
VCC = 5.5 V
Outputs low
84
136
mA
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ For I/O ports, the parameters IIH and IIL include the off-state output current.


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