SN74LS248N 查看數據表（PDF） - Motorola => Freescale
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SN74LS248N Datasheet PDF : 8 Pages
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SN54/74LS247 • SN54/74LS248 • SN54/74LS249
SN54 / 74LS247
(TOP VIEW)
OUTPUTS
VCC
f
g
a
b
c
d
e
16
15
14
13
12
11
10
9
f g a bc d e
BI/
B C LT RBORBI D A
1
2
B
C
INPUTS
3
4
5
LAMP
TEST
RB
OUT
PUT
RB
IN
PUT
6
7
D
A
INPUTS
8
GND
SN54 / 74LS248
SN54 / 74LS259
(TOP VIEW)
OUTPUTS
VCC
f
g
a
b
c
d
e
16
15
14
13
12
11
10
9
f g a bc d e
BI/
B C LT RBORBI D A
1
2
B
C
INPUTS
3
4
5
LAMP
TEST
RB
OUT
PUT
RB
IN
PUT
6
7
D
A
INPUTS
8
GND
ALL CIRCUIT TYPES FEATURE LAMP INTENSITY MODULATION CAPABILITY
TYPE
ACTIVE
LEVEL
DRIVER OUTPUTS
OUTPUT
SINK
CONFIGURATION CURRENT
MAX
VOLTAGE
TYPICAL
POWER
DISSIPATION
SN54LS247
low
SN54LS248
high
SN54LS249
high
open-collector
2.0 kΩ pull-up
open-collector
12 mA
2.0 mA
4.0 mA
15 V
5.5 V
5.5 V
35 mW
125 mW
40 mW
SN74LS247
low
SN74LS248
high
SN74LS249
high
open-collector
2.0 kΩ pull-up
open-collector
24 mA
6.0 mA
8.0 mA
15 V
5.5 V
5.5 V
35 mW
125 mW
40 mW
INPUT (7)
A
INPUT (1)
B
INPUT (2)
C
INPUT (6)
D
BI/RBO
BLANKING
(4)
INPUT OR
RIPPLEĆBLANKING
OUTPUT
(3)
LAMP TEST
INPUT
RBI
(5)
RIPPLEĆBLANKING
INPUT
LS247
LOGIC DIAGRAM
(13)
OUTPUT
a
(12)
OUTPUT
b
(11)
OUTPUT
c
(10)
OUTPUT
d
(9)
OUTPUT
e
(15)
OUTPUT
f
(14)
OUTPUT
g
INPUT (7)
A
INPUT (1)
B
INPUT (2)
C
INPUT (6)
D
BLANKING
(4)
INPUT OR
RIPPLEĆBLANKING
OUTPUT
(3)
LAMP TEST
INPUT
(5)
RIPPLEĆBLANKING
INPUT
FAST AND LS TTL DATA
5-403
LS248, LS249
(13)
OUTPUT
a
(12)
OUTPUT
b
(11)
OUTPUT
c
(10)
OUTPUT
d
(9)
OUTPUT
e
(15)
OUTPUT
f
(14)
OUTPUT
g
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