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SN74ALS641A データシート(PDF) 3 Page - Texas Instruments

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部品番号 SN74ALS641A
部品情報  OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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SN74ALS641A データシート(HTML) 3 Page - Texas Instruments

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SN74ALS641A, SN74ALS642A, SN74AS641
OCTAL BUS TRANSCEIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS300 – MARCH 1995
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74ALS641A
SN74ALS642A
UNIT
MIN
TYP†
MAX
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.5
V
IOH
VCC = 4.5 V,
VOH = 5.5 V
0.1
mA
IOL = 12 mA
0.25
0.4
VOL
VCC = 4.5 V
IOL = 24 mA
0.35
0.5
V
IOL = 48 mA‡
0.35
0.5
II
Control inputs
VCC = 5.5 V,
VI = 7 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
20
µA
IIL
Control inputs
VCC =5 5V
VI =0 4V
– 0.1
mA
IIL
A or B ports§
VCC = 5.5 V,
VI = 0.4 V
– 0.1
mA
SN74ALS641A
VCC =5 5V
Outputs high
25
37
ICC
SN74ALS641A
VCC = 5.5 V
Outputs low
33
47
mA
ICC
SN74ALS642A
VCC =5 5V
Outputs high
8
15
mA
SN74ALS642A
VCC = 5.5 V
Outputs low
18
28
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V
§ For I/O ports, the parameters IIH and IIL include the off-state output current.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 680 Ω,
TA = MIN to MAX¶
UNIT
(INPUT)
(OUTPUT)
SN74ALS641A
SN74ALS642A
MIN
MAX
MIN
MAX
tPLH
AorB
BorA
5
25
10
30
ns
tPHL
A or B
B or A
3
18
5
22
ns
tPLH
OE
AorB
8
30
10
30
ns
tPHL
OE
A or B
8
30
15
38
ns
tPLH
DIR
AorB
8
32
10
30
ns
tPHL
DIR
A or B
8
32
15
38
ns
¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.


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