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. http://onsemi.com LOW POWER SCHOTTKY • Open-Collector Outputs Drive Indicators Directly • Lamp-Test Provision • Leading/ Trailing Zero Suppression 16 1 GUARANTEED OPERATING RANGES Symbol VCC Parameter Supply Voltage Min Typ Max Unit 4.75 5.0 5.25 V 0 25 70 °C TA Operating Ambient Temperature Range IOH Output Current – High BI/RBO – 50 mA IOL Output Current – Low BI/RBO 3.2 mA VO(off) Off–State Output Voltage a–g 15 V IO(on) On–State Output Current a–g 24 mA PLASTIC N SUFFIX CASE 648 16 1 SOIC D SUFFIX CASE 751B ORDERING INFORMATION Device Semiconductor Components Industries, LLC, 1999 December, 1999 – Rev. 6 1 Package Shipping SN74LS247N 16 Pin DIP 2000 Units/Box SN74LS247D 16 Pin 2500/Tape & Reel Publication Order Number: SN74LS247/D SN74LS247 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NUMERICAL DESIGNATIONS AND RESULTANT DISPLAYS a f g b e c d SEGMENT IDENTIFICATION SN74LS247 (TOP VIEW) OUTPUTS VCC f g a b c d e 16 15 14 13 12 11 10 9 7 A 8 GND f g a b c d e 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 INPUTS CIRCUIT FEATURES LAMP INTENSITY MODULATION CAPABILITY DRIVER OUTPUTS TYPE ACTIVE LEVEL OUTPUT CONFIGURATION SINK CURRENT MAX VOLTAGE TYPICAL POWER DISSIPATION SN74LS247 low open-collector 24 mA 15 V 35 mW http://onsemi.com 2 SN74LS247 LOGIC DIAGRAM LS247 (13) INPUT (7) A INPUT (1) B (12) INPUT (2) C (11) INPUT (6) D (10) BI/RBO BLANKING (4) INPUT OR RIPPLE-BLANKING OUTPUT (9) (15) (3) LAMP TEST INPUT RBI (5) RIPPLE-BLANKING INPUT (14) http://onsemi.com 3 OUTPUT a OUTPUT b OUTPUT c OUTPUT d OUTPUT e OUTPUT f OUTPUT g SN74LS247 LS247 FUNCTION TABLE DECIMAL OR FUNCTION LT RBI D C B A 0 1 2 3 H H H H H X X X L L L L L L L L L L H H L H L H 4 5 6 7 H H H H X X X X L L L L H H H H L L H H 8 9 10 11 H H H H X X X X H H H H L L L L 12 13 14 15 H H H H X X X X H H H H BI RBI LT X H L X L X X L X INPUTS OUTPUTS BI/RBO NOTE a b c d e f g H H H H ON OFF ON ON ON ON ON ON ON ON OFF ON ON OFF ON ON ON OFF ON OFF ON OFF OFF OFF OFF OFF ON ON L H L H H H H H OFF ON ON ON ON OFF OFF ON ON ON ON ON OFF ON ON OFF OFF OFF ON OFF ON ON ON OFF ON ON ON OFF L L H H L H L H H H H H ON ON OFF OFF ON ON OFF OFF ON ON OFF ON ON ON ON ON ON OFF ON OFF ON ON OFF OFF ON ON ON ON H H H H L L H H L H L H H H H H OFF ON OFF OFF ON OFF OFF OFF OFF OFF OFF OFF OFF ON ON OFF OFF OFF ON OFF ON ON ON OFF ON ON ON OFF X L X X L X X L X L L H OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF ON 1 2 3 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). http://onsemi.com 4 SN74LS247 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage BI / RBO VOL O Output LOW Voltage g BI / RBO IO(off) Off-State Output Current a–g VO(on) O( ) On-State Output Voltage g a–g IIH Input HIGH Current IIL Min Typ Max 2.0 0.8 – 0.65 2.4 – 1.5 4.2 Unit Test Conditions V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN, IIN = – 18 mA V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table 0.25 0.4 V IOL = 1.6 mA 0.35 0.5 V IOL = 3.2 mA 250 µA VCC = MAX, VIH = 2.0 V, VO(off) = 15 V, VIL = MAX 0.25 0.4 V IO(on) = 12 mA 0.35 0.5 V IO(on) = 24 mA 20 µA VCC = MAX, VIN = 2.7 V 0.1 mA VCC = MAX, VIN = 7.0 V – 0.4 mA VCC = MAX, VIN = 0.4 V – 2.0 mA VCC = MAX 13 mA VCC = MAX Input LOW Current Any Input, except BI / RBO BI / RBO VCC = MIN, VIH = 2.0 V, VIL per Truth Table – 1.2 IOS Short Circuit Current BI / RBO (Note 1) ICC Power Supply Current – 0.3 7.0 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 tPLH tPHL Turn-Off Time from A Input Turn-On Time from A Input 100 100 ns tPHL tPLH Turn-Off Time from RBI Input Turn-On Time from RBI Input 100 100 ns http://onsemi.com 5 Test Conditions CL = 15 pF, RL = 665 Ω SN74LS247 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– 16 9 1 8 B F C L S –T– SEATING PLANE K H G D M J 16 PL 0.25 (0.010) M T A M http://onsemi.com 6 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 SN74LS247 D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J –A– 16 9 1 8 –B– P 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. 8 PL 0.25 (0.010) M B S G R K F X 45 _ C –T– SEATING PLANE J M D 16 PL 0.25 (0.010) M T B S A S http://onsemi.com 7 DIM A B C D F G J K M P R 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 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. 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