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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.
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LOW POWER SCHOTTKY
* Open-Collector Outputs Drive Indicators Directly * Lamp-Test Provision * Leading/ Trailing Zero Suppression
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL VO(off) IO(on) Parameter Supply Voltage Operating Ambient Temperature Range Output Current - High BI/RBO Output Current - Low BI/RBO Off-State Output Voltage a-g On-State Output Current a-g Min 4.75 0 Typ 5.0 25 Max 5.25 70 - 50 3.2 15 24 Unit V C
16 1
PLASTIC N SUFFIX CASE 648
mA
16
mA V mA
1
SOIC D SUFFIX CASE 751B
ORDERING INFORMATION
Device SN74LS247N SN74LS247D Package 16 Pin DIP 16 Pin Shipping 2000 Units/Box 2500/Tape & Reel
(c) Semiconductor Components Industries, LLC, 1999
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December, 1999 - Rev. 6
Publication Order Number: SN74LS247/D
SN74LS247
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NUMERICAL DESIGNATIONS AND RESULTANT DISPLAYS
a f e d g b c
SEGMENT IDENTIFICATION
SN74LS247 (TOP VIEW)
OUTPUTS VCC 16 f 15 g 14 f g a 13 b 12 c 11 d 10 e 9
abcde
BI/ B C LT RBORBI D A
1 B
2 C
INPUTS
3 4 LAMP RB TEST OUT PUT
5 RB IN PUT
6 D
7 A
8 GND
INPUTS
CIRCUIT FEATURES LAMP INTENSITY MODULATION CAPABILITY
DRIVER OUTPUTS TYPE SN74LS247 ACTIVE LEVEL low OUTPUT CONFIGURATION open-collector SINK CURRENT 24 mA MAX VOLTAGE 15 V TYPICAL POWER DISSIPATION 35 mW
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SN74LS247
LOGIC DIAGRAM LS247
(13) INPUT (7) A INPUT (1) B INPUT (2) C INPUT (6) D BI/RBO BLANKING (4) INPUT OR RIPPLE-BLANKING OUTPUT (3) (14) (12) OUTPUT a
OUTPUT b OUTPUT c OUTPUT d OUTPUT e OUTPUT f OUTPUT g
(11)
(10)
(9)
(15)
LAMP TEST INPUT RBI (5) RIPPLE-BLANKING INPUT
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SN74LS247
LS247 FUNCTION TABLE
DECIMAL OR FUNCTION 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BI RBI LT INPUTS LT H H H H H H H H H H H H H H H H X H L RBI H X X X X X X X X X X X X X X X X L X D L L L L L L L L H H H H H H H H X L X C L L L L H H H H L L L L H H H H X L X B L L H H L L H H L L H H L L H H X L X A L H L H L H L H L H L H L H L H X L X H H H H H H H H H H H H H H H H L L H BI/RBO a ON OFF ON ON OFF ON ON ON ON ON OFF OFF OFF ON OFF OFF OFF OFF ON b ON ON ON ON ON OFF OFF ON ON ON OFF OFF ON OFF OFF OFF OFF OFF ON c ON ON OFF ON ON ON ON ON ON ON OFF ON OFF OFF OFF OFF OFF OFF ON OUTPUTS d ON OFF ON ON OFF ON ON OFF ON ON ON ON OFF ON ON OFF OFF OFF ON e ON OFF ON OFF OFF OFF ON OFF ON OFF ON OFF OFF OFF ON OFF OFF OFF ON f ON OFF OFF OFF ON ON ON OFF ON ON OFF OFF ON ON ON OFF OFF OFF ON g OFF OFF ON ON ON ON ON OFF ON ON ON ON ON ON ON OFF OFF OFF ON 2 3 4 NOTE
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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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SN74LS247
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage BI / RBO Output LOW Voltage g BI / RBO Off-State Output Current a-g On-State Output Voltage g a-g Input HIGH Current 0.1 Input LOW Current Any Input, except BI / RBO BI / RBO IOS ICC Short Circuit Current BI / RBO (Note 1) Power Supply Current - 0.3 7.0 - 0.4 - 1.2 - 2.0 13 mA mA VCC = MAX VCC = MAX 0.25 0.35 2.4 - 0.65 4.2 0.25 0.35 0.4 0.5 250 0.4 0.5 20 IIH Min 2.0 0.8 - 1.5 Typ Max Unit V V V V V V A V V A mA Test Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VCC = MIN, IIN = - 18 mA VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table IOL = 1.6 mA IOL = 3.2 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table
VO OL
IO(off) VO( ) O(on)
VCC = MAX, VIH = 2.0 V, VO(off) = 15 V, VIL = MAX IO(on) = 12 mA IO(on) = 24 mA VCC = MIN, VIH = 2.0 V, VIL per Truth Table
VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.4 V
IIL
mA
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 = 25C)
Limits Symbol tPLH tPHL tPHL tPLH Parameter Turn-Off Time from A Input Turn-On Time from A Input Turn-Off Time from RBI Input Turn-On Time from RBI Input Min Typ Max 100 100 100 100 Unit ns ns CL = 15 pF, RL = 665 Test Conditions
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SN74LS247
PACKAGE DIMENSIONS
N SUFFIX PLASTIC PACKAGE CASE 648-08 ISSUE R
-A-
16 9 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. DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01
B
1 8
F S
C
L
-T- H G D
16 PL
SEATING PLANE
K
J TA
M
M
0.25 (0.010)
M
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SN74LS247
D SUFFIX PLASTIC SOIC PACKAGE CASE 751B-05 ISSUE J
-A-
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. MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019
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9
-B-
1 8
P
8 PL
0.25 (0.010)
M
B
S
G F
K C -T-
SEATING PLANE
R
X 45 _
M D
16 PL M
J
0.25 (0.010)
TB
S
A
S
DIM A B C D F G J K M P R
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SN74LS247
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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SN74LS247/D

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