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SN74F621DW датащи(PDF) 2 Page - Texas Instruments

номер детали SN74F621DW
подробное описание детали  OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74F621DW датащи(HTML) 2 Page - Texas Instruments

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SN54F621, SN74F621
OCTAL BUS TRANSCEIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDFS004B – D2932, MARCH 1987 – REVISED OCTOBER 1993
2–2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic symbol
logic diagram (positive logic)
2
A1
B1
EN1
19
EN2
1
OEAB
2
A1
3
A2
B1
18
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
B2
17
B3
16
B5
14
B4
15
B6
13
B8
11
B7
12
OEBA
1
OEBA
OEAB
19
1
18
2
To Seven Other Channels
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
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 (excluding I/O ports) (see Note 1)
– 1.2 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range, IIK
– 30 mA to 5 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state
– 0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54F621 (A1 – A8)
40 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN54F621 (B1 – B8)
96 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F621 (A1 – A8)
48 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F621 (B1 – B8)
128 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range:
SN54F621
– 55
°C to 125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F621
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.
NOTE 1: The input-voltage ratings may be exceeded provided the input-current ratings are observed.
recommended operating conditions
SN54F621
SN74F621
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
VOH
High-level output voltage
5.5
5.5
V
VIL
Low-level input voltage
0.8
0.8
V
IIK
Input clamp current
–18
–18
mA
IOL
Low level output current
A1 – A8
20
24
mA
IOL
Low-level output current
B1 – B8
48
64
mA
TA
Operating free-air temperature
–55
125
0
70
°C


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