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Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1 Publication Order Number:
SN74LS247/D
SN74LS247
BCD-to-Seven-Segment
Decoders/Drivers
The SN74LS247 is a BCD-to-Seven-Segment Decoder/Drivers.
The LS247 composes the
and with the tails. The LS247 has
active-low outputs for direct drive of indicators.
The LS247 features a lamp test input and have full ripple-blanking
input/output controls. An automatic leading and/or trailing-edge
zero-blanking control (RBI and RBO) is incorporated and an
overriding blanking input (BI) is contained which may be used to
control the lamp intensity by pulsing or to inhibit the output’s lamp test
may be performed at any time when the BI/RBO node is at high level.
Segment identification and resultant displays are shown below.
Display pattern for BCD input counts above 9 are unique symbols to
authenticate input conditions.
• Open-Collector Outputs Drive Indicators Directly
• Lamp-Test Provision
• Leading/Trailing Zero Suppression
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 4.75 5.0 5.25 V
T
A
Operating Ambient
T emperature Range
0 25 70 °C
I
OH
Output Current – High
BI/RBO
–50
m
A
I
OL
Output Current – Low
BI/RBO
3.2 mA
V
O(off)
Off–State Output Voltage
a – g
15 V
I
O(on)
On–State Output Current
a – g
24 mA
LOW
POWER
SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS247N 16 Pin DIP 2000 Units/Box
SN74LS247D 16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
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SEGMENT
IDENTIFICATION
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
a
b
c
d
e
fg
NUMERICAL DESIGNATIONS AND RESULTANT DISPLAYS
SN74LS247
(TOP VIEW)
14 13 12 11 10 9
123456
7
16 15
8
V
CC
B
fgab dce
C LAMP
TESTRBOUT
PUT
RB
IN
PUT
D A GND
INPUTS INPUTS
OUTPUTS
fgabcde
B C LTRBORBI D A
BI/
CIRCUIT FEATURES LAMP INTENSITY MODULATION CAPABILITY
DRIVER OUTPUTS
TYPICAL
TYPE ACTIVE
LEVEL
OUTPUT
CONFIGURATION
SINK
CURRENT
MAX
VOLTAGE
POWER
DISSIPATION
SN74LS247 low open-collector 24 mA 15 V 35 mW
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INPUT
A
(7)
INPUT
B
INPUT
C
(1)
(2)
(6)
INPUT
D
(4)
BI/RBO
BLANKING
INPUT OR
RIPPLE-BLANKING
OUTPUT
LAMP TEST
INPUT
(3)
RBI
RIPPLE-BLANKING
INPUT
(5)
OUTPUT
(13)
a
(12)
OUTPUT
b
(11)
OUTPUT
c
(10)
OUTPUT
d
(9)
OUTPUT
e
(15)
OUTPUT
f
(14)
OUTPUT
g
LOGIC DIAGRAM
LS247
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LS247
FUNCTION TABLE
DECIMAL
INPUTS
OUTPUTS
OR
FUNCTION
LT RBI D C B A
BI/RBO
a b c d e f g
NOTE
0 H H L L L L H ON ON ON ON ON ON OFF
1 H X L LLH H OFF ON ON OFF OFF OFF OFF
2 H X L LHL H ON ON OFF ON ON OFF ON
3 H X L LHH H ON ON ON ON OFF OFF ON
4 H X L H L L H OFF ON ON OFF OFF ON ON
5 H X L HLH H ON OFF ON ON OFF ON ON
6 H X L HHL H ON OFF ON ON ON ON ON
7 H X L HHH H ON ON ON OFF OFF OFF OFF 1
8 H X H L L L H ON ON ON ON ON ON ON
9 H X H LLH H ON ON ON ON OFF ON ON
10 H X H LHL H OFF OFF OFF ON ON OFF ON
11 H X H LHH H OFF OFF ON ON OFF OFF ON
12 H X H H L L H OFF ON OFF OFF OFF ON ON
13 H X H HLH H ON OFF OFF ON OFF ON ON
14 H X H HHL H OFF OFF OFF ON ON ON ON
15 H X H HHH H OFF OFF OFF OFF OFF OFF OFF
BI X X X X X X L OFF OFF OFF OFF OFF OFF OFF 2
RBI H L L LLL L OFF OFF OFF OFF OFF OFF OFF 3
LT L X X X X X H ON ON ON ON ON ON ON 4
H = HIGH Level, L = LOW Level, X = Irrelevant
NOTES: 1. The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired. The ripple-blanking input (RBI) must
be open or high if blanking of a decimal zero is not desired.
2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are off regardless of the level of any other input.
3. When ripple-blanking input (RBI) and inputs A, B, C, and D are at a low level with the lamp test input high, all segment outputs go off and the
ripple-blanking output (RBO) goes to a low level (response condition).
4. When the blanking input/ripple blanking output (BI/RBO) is open or held high and a low is applied to the lamp-test input, all segment outputs are on.
BI/RBO is wire-AND logic serving as blanking input (BI) and/or ripple-blanking output (RBO).
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DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter
Min Typ Max
Unit Test Conditions
V
IH
Input HIGH Voltage 2.0 V
Guaranteed Input HIGH Voltage for
All Inputs
V
IL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
V
IK
Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
V
OH
Output HIGH Voltage
BI/RBO
2.4 4.2 V
VCC = MIN, IOH = MAX, VIN = V
IH
or VIL per Truth Table
Output LOW Voltage
0.25 0.4 V IOL = 1.6 mA
VCC = VCC MIN,
V
OL
g
BI/RBO
0.35 0.5 V IOL = 3.2 mA
V
IN
=
V
IL
or
V
IH
per Truth Table
I
O(off)
Off-State Output Current
a–g
250 µA
VCC = MAX, VIH = 2.0 V,
V
O(off)
= 15 V, VIL = MAX
On-State Output Voltage
0.25 0.4 V I
O(on)
= 12 mA
VCC = MIN, VIH = 2.0 V,
V
O(on)
g
a–g
0.35 0.5 V I
O(on)
= 24 mA
CC IH
VIL per Truth Table
p
20 µA VCC = MAX, VIN = 2.7 V
IIHInput HIGH Current
0.1 mA VCC = MAX, VIN = 7.0 V
I
IL
Input LOW Current
Any Input, except BI/RBO
–0.4
mA VCC = MAX, VIN = 0.4 V
IL
BI/RBO –1.2
CC IN
I
OS
Short Circuit Current
BI/RBO (Note 1)
–0.3 –2.0 mA VCC = MAX
I
CC
Power Supply Current 7.0 13 mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (V
CC
= 5.0 V, TA = 25°C)
Limits
Symbol Parameter
Min Typ Max
Unit Test Conditions
t
PLH
t
PHL
Turn-Off T ime from A Input
Turn-On Time from A Input
100
100
ns
CL = 15 pF,
t
PHL
t
PLH
Turn-Off T ime from RBI Input
Turn-On Time from RBI Input
100
100
ns
L
RL = 665 Ω
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P ACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
B
F
C
S
H
G
D
J
L
M
16 PL
SEATING
18
916
K
PLANE
–T–
M
A
M
0.25 (0.010) T
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A 0.740 0.770 18.80 19.55
B 0.250 0.270 6.35 6.85
C 0.145 0.175 3.69 4.44
D 0.015 0.021 0.39 0.53
F 0.040 0.70 1.02 1.77
G 0.100 BSC 2.54 BSC
H 0.050 BSC 1.27 BSC
J 0.008 0.015 0.21 0.38
K 0.110 0.130 2.80 3.30
L 0.295 0.305 7.50 7.74
M 0 10 0 10
S 0.020 0.040 0.51 1.01
____
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D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
18
16 9
SEATING
PLANE
F
J
M
R
X 45
_
G
8 PLP
–B–
–A–
M
0.25 (0.010) B
S
–T–
D
K
C
16 PL
S
B
M
0.25 (0.010) A
S
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A 9.80 10.00 0.386 0.393
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G 1.27 BSC 0.050 BSC
J 0.19 0.25 0.008 0.009
K 0.10 0.25 0.004 0.009
M 0 7 0 7
P 5.80 6.20 0.229 0.244
R 0.25 0.50 0.010 0.019
____
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