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SN74F2245DW Scheda tecnica(PDF) 2 Page - Texas Instruments

Il numero della parte SN74F2245DW
Spiegazioni elettronici  25-ohm OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
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SN74F2245
25 Ω OCTAL BUS TRANSCEIVER
WITH 3STATE OUTPUTS
SDFS099 − MAY 1995
2
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 range, VCC
−0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (except I/O ports) (see Note 1)
−1.2 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range
−30 mA to 5 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state
−0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state
−0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA
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.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
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
IIK
Input clamp current
−18
mA
IOH
High-level output current
− 3
mA
IOL
Low-level output current
12
mA
TA
Operating free-air temperature
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP‡
MAX
UNIT
VIK
VCC = 4.5 V,
II = −18 mA
−1.2
V
V
4 5 V
IOH = − 1 mA
2.5
3.4
VOH
Any output
VCC = 4.5 V
IOH = − 3 mA
2.4
3.3
V
VOH
Any output
VCC = 4.75 V,
IOH = −1 mA to − 3 mA
2.7
V
V
An otpt
V
4 5 V
IOL = 1 mA
0.2
0.5
V
VOL
Any output
VCC = 4.5 V
IOL = 12 mA
0.5
0.75
V
I
A and B
V
5 5 V
VI = 5.5 V
1
mA
II
DIR and OE
VCC = 5.5 V
VI = 7 V
0.1
mA
I §
A and B
V
5 5 V
V
27 V
70
A
IIH§
DIR and OE
VCC = 5.5 V,
VI = 2.7 V
20
μA
I §
A and B
V
5 5 V
V
05 V
−0.5
mA
IIL§
DIR and OE
VCC = 5.5 V,
VI = 0.5 V
− 0.5
mA
IOS¶
A and B
VCC = 5.5 V,
VO = 0
−50
−120
mA
Outputs high
62
90
ICC
VCC = 5.5 V
Outputs low
73
105
mA
CC
CC
Outputs disabled
72
100
‡ 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.
¶ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.


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