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SN74LS273N Datasheet(PDF) 1 Page - Motorola, Inc |
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SN74LS273N Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 5 page 5-447 FAST AND LS TTL DATA OCTAL D FLIP-FLOP WITH CLEAR The SN54 / 74LS273 is a high-speed 8-Bit Register. The register consists of eight D-Type Flip-Flops with a Common Clock and an asynchronous active LOW Master Reset. This device is supplied in a 20-pin package featuring 0.3 inch lead spacing. • 8-Bit High Speed Register • Parallel Register • Common Clock and Master Reset • Input Clamp Diodes Limit High-Speed Termination Effects 18 17 16 15 14 13 1 2 3 4 5 6 7 20 19 8 VCC MR Q7 D7 D6 Q6 D5 Q5 D4 Q0 D0 D1 Q1 Q2 D2 D3 9 10 Q3 GND 12 11 Q4 CP CONNECTION DIAGRAM DIP (TOP VIEW) PIN NAMES LOADING (Note a) HIGH LOW CP Clock (Active HIGH Going Edge) Input 0.5 U.L. 0.25 U.L. D0 – D7 Data Inputs 0.5 U.L. 0.25 U.L. MR Master Reset (Active LOW) Input 0.5 U.L. 0.25 U.L. Q0 – Q7 Register Outputs (Note b) 10 U.L. 5 (2.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. TRUTH TABLE MR CP Dx Qx L X X L H H H H L L H = HIGH Logic Level L = LOW Logic Level X = Immaterial LOGIC DIAGRAM CP MR D0 D1 D2 D3 D4 D5 D6 D7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 CP D CD Q CP D CD Q CP D CD Q CP D CD Q CP D CD Q CP D CD Q CP D CD Q CP D CD Q 14 1 2 6 7 3 8 4 5 9 11 12 13 15 VCC = PIN 20 GND = PIN 10 = PIN NUMBERS 17 18 16 19 SN54/74LS273 OCTAL D FLIP-FLOP WITH CLEAR LOW POWER SCHOTTKY ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 20 1 DW SUFFIX SOIC CASE 751D-03 |
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