Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6 1Publication 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/T railing Zero Suppression
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 4.75 5.0 5.25 V
TAOperating Ambient
Temperature Range 0 25 70 °C
IOH Output Current – High
BI/RBO –50
m
A
IOL Output Current – Low
BI/RBO 3.2 mA
VO(off) Of f–State Output Voltage
a – g 15 V
IO(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
SN74LS247
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2
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
1234567
16 15
8
VCC
B
fgab dce
C LAMP
TEST RB
OUT
PUT
RB
IN
PUT
D A GND
INPUTS INPUTS
OUTPUTS
fgabcde
B C LT RBORBI 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
SN74LS247
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3
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
SN74LS247
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4
LS247
FUNCTION TABLE
DECIMAL
OR
INPUTS
BI/RBO
OUTPUTS
NOTE
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).
SN74LS247
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5
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 VGuaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage 0.8 VGuaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
VOH Output HIGH Voltage
BI/RBO 2.4 4.2 VVCC = MIN, IOH = MAX, VIN = VIH
or VIL per T ruth Table
VO
Output LOW Voltage 0.25 0.4 V IOL = 1.6 mA VCC = VCC MIN,
VIN =V
IL or VIH
V
OL
g
BI/RBO 0.35 0.5 V IOL = 3.2 mA
V
IN =
V
IL
or
V
IH
per T ruth Table
IO(off) Of f-State Output Current
a–g 250 µAVCC = MAX, VIH = 2.0 V,
VO(off) = 15 V, VIL = MAX
VO( )
On-State Output Voltage 0.25 0.4 V IO(on) = 12 mA VCC = MIN, VIH = 2.0 V,
V
O(on)
g
a–g 0.35 0.5 V IO(on) = 24 mA
CC IH
VIL per T ruth Table
I
In
p
ut HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
I
IH
Inp
u
t
HIGH
C
u
rrent
0.1 mA VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
Any Input, except BI/RBO –0.4 mA VCC = MAX, VIN = 0.4 V
IL
BI/RBO –1.2
CC IN
IOS Short Circuit Current
BI/RBO (Note 1) –0.3 –2.0 mA VCC = MAX
ICC 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 (VCC = 5.0 V, TA = 25 °C)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
tPLH
tPHL T urn-Off Time from A Input
T urn-On Time from A Input 100
100 ns CL = 15 pF,
tPHL
tPLH T urn-Off Time from RBI Input
T urn-On Time from RBI Input 100
100 ns
L
RL = 665 Ω
SN74LS247
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6
PACKAGE 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
FC
S
HGD
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
A0.740 0.770 18.80 19.55
B0.250 0.270 6.35 6.85
C0.145 0.175 3.69 4.44
D0.015 0.021 0.39 0.53
F0.040 0.70 1.02 1.77
G0.100 BSC 2.54 BSC
H0.050 BSC 1.27 BSC
J0.008 0.015 0.21 0.38
K0.110 0.130 2.80 3.30
L0.295 0.305 7.50 7.74
M0 10 0 10
S0.020 0.040 0.51 1.01
____
SN74LS247
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7
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
RX 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
A9.80 10.00 0.386 0.393
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019
____
SN74LS247
http://onsemi.com
8
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