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MC74FXXJ Datasheet(PDF) 1 Page - Motorola, Inc |
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MC74FXXJ Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 4 page 4-36 FAST AND LS TTL DATA 4-BIT MAGNITUDE COMPARATOR The MC54/74F85 is a 4-Bit Magnitude Comparator which compares two 4-Bit words (A0-A3,B0-B3),A3,B3beingthemostsignificantinputs. Operation is not restricted to binary codes; the device will work with any monotonic code. Three Outputs are provided: “A greater than B” (0A > B), “A less than B” (0A < B), “A equal to B” (0A = B). Three Expander Inputs, IA > B, IA < B, IA = B, allow cascading without external gates. For proper compare operation, the Expan- der Inputs to the least significant position must be connected as follows: IA < B = IA > B = L, IA = B = H. For serial (ripple) expansion the 0A > B, 0A < B Outputs are connected respectively to the IA > B and IA = B inputs of the next most sig- nificant comparator, as shown in Figure 1. Refer to applications section of data sheet for high speed method of comparing large words. • High Impedance NPN Base Inputs for Reduced Loading (20 µA in HIGH and LOW States) • Magnitude Comparison of any Binary Words • Serial or Parallel Expansion Without Extra Gating • ESD > 4000 Volts CONNECTION DIAGRAM 15 16 14 13 12 11 10 2 1 3 4 5 6 7 VCC 9 8 A3 B2 A2 A1 B1 A0 B0 B3 IA<B IA=B IA>B A>B A=B A<B GND GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54, 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 54 –55 25 125 °C A 74 0 25 70 IOH Output Current High 54, 74 –1.0 mA IOL Output Current Low 54, 74 20 mA MC54/74F85 4-BIT MAGNITUDE COMPARATOR FAST ™ SCHOTTKY TTL J SUFFIX CERAMIC CASE 620-09 N SUFFIX PLASTIC CASE 648-08 16 1 16 1 ORDERING INFORMATION MC74FXXJ Ceramic MC74FXXN Plastic MC74FXXD SOIC 16 1 D SUFFIX SOIC CASE 751B-03 |
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