SN54/74LS76A DUAL JK FLIP-FLOP WITH SET AND CLEAR The SN54/ 74LS76A offers individual J, K, Clock Pulse, Direct Set and Direct Clear inputs. These dual flip-flops are designed so that when the clock goes HIGH, the inputs are enabled and data will be accepted. The Logic Level of the J and K inputs will perform according to the Truth Table as long as minimum set-up times are observed. Input data is transferred to the outputs on the HIGH-to-LOW clock transitions. DUAL JK FLIP-FLOP WITH SET AND CLEAR LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 MODE SELECT — TRUTH TABLE INPUTS OUTPUTS 16 OPERATING MODE Set Reset (Clear) *Undetermined Toggle Load “0” (Reset) Load “1” (Set) Hold SD CD J K Q Q L H L H H H H H L L H H H H X X X h l h l X X X h h l l H L H q L H q L H H q H L q 1 N SUFFIX PLASTIC CASE 648-08 16 1 *Both outputs will be HIGH while both SD and CD are LOW, but the output states are unpredictable if SD and CD go HIGH simultaneously. H,h = HIGH Voltage Level L,l = LOW Voltage Level X = Immaterial l, h (q) = Lower case letters indicate the state of the referenced input (or output) one setup time prior to the HIGH-to-LOW clock transition D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC LOGIC DIAGRAM LOGIC SYMBOL Q 2 Q CLEAR (CD) K 1 CP 4 J C Q D SET (SD) K J SD Q 16 7 15 14 SD Q 11 6 CP 9 J C Q D 10 12 K 3 8 VCC = PIN 5 GND = PIN 13 CLOCK (CP) FAST AND LS TTL DATA 5-79 SN54/74LS76A GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH Output Current — High 54, 74 – 0.4 mA IOL Output Current — Low 54 74 4.0 8.0 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IIH Min Parameter Typ Max 2.0 54 0.7 74 0.8 – 0.65 – 1.5 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 54 2.5 3.5 V 74 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table 54, 74 0.25 0.4 V IOL = 4.0 mA 74 0.35 0.5 V IOL = 8.0 mA J, K Clear Clock 20 60 80 µA VCC = MAX, VIN = 2.7 V J, K Clear Clock 0.1 0.3 0.4 mA VCC = MAX, VIN = 7.0 V – 0.4 – 0.8 mA VCC = MAX, VIN = 0.4 V –100 mA VCC = MAX 6.0 mA VCC = MAX Max Unit Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 1) ICC Power Supply Current J, K Clear, Clock – 20 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) Limits Symbol Parameter fMAX Maximum Clock Frequency tPLH tPHL Clock, Clear, Set to Output Min Typ 30 45 Test Conditions MHz 15 20 ns 15 20 ns Max Unit VCC = 5.0 V CL = 15 pF AC SETUP REQUIREMENTS (TA = 25°C) Limits Symbol Parameter Min Typ tW Clock Pulse Width High 20 ns tW Clear Set Pulse Width 25 ns ts Setup Time 20 ns th Hold Time 0 ns FAST AND LS TTL DATA 5-80 Test Conditions VCC = 5.0 V