SN74LS248 Motorola, SN74LS248 Datasheet - Page 2

• Manufacturer Part Number: SN74LS248
• Description: BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS
• Manufacturer: Motorola

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