SN54LS76A MOTOROLA | Alldatasheet

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Technical content

The SN54/74LS76A offers individual J, K, Clock Pulse, Direct Set and Di- rect 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 mini- mum set-up times are observed. Input data is transferred to the outputs on the HIGH-to-LOW clock transitions. MODE SELECT — TRUTH TABLE OPERATING MODE INPUTS OUTPUTS OPERATING MODE SD C D J K Q Q Set Reset (Clear) *Undetermined Toggle Load “0” (Reset) Load “1” (Set) Hold 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 *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 LOGIC DIAGRAM Q CLEAR (C D ) J CLOCK (CP ) K SET (SD ) Q SN54/74LS76A DUAL JK FLIP-FLOP WITH SET AND CLEAR LOW POWER SCHOTTKY LOGIC SYMBOL K Q CP J Q SD VCC = PIN 5 GND = PIN 13 K Q CP J QC D J SUFFIX CERAMIC CASE 620-09 N SUFFIX PLASTIC CASE 648-08

ORDERING INFORMATION

GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient T emperature Range 54 –55 125 IOH Output Current — High 54, 74 –0.4 mA IOL Output Current — Low 54 4.0 8.0 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Symbol Parameter Limits Unit Test ConditionsSymbol Parameter Min Typ Max Unit Test Conditions VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for All Inputs VIL Input LOW Voltage 54 0.7 V Guaranteed Input LOW Voltage for All InputsVIL Input LOW Voltage 74 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA VOH Output HIGH Voltage 54 2.5 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth TableVOH Output HIGH Voltage 74 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VOL Output LOW Voltage 54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VOL Output LOW Voltage 74 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH per Truth Table IIH Input HIGH Current J, K Clear Clock µA VCC = MAX, VIN = 2.7 V IIH Input HIGH Current J, K Clear Clock 0.1 0.3 0.4 mA VCC = MAX, VIN = 7.0 V IIL Input LOW Current J, K Clear, Clock –0.4 –0.8 mA VCC = MAX, VIN = 0.4 V IOS Short Circuit Current (Note 1) –20 –100 mA VCC = MAX ICC Power Supply Current 6.0 mA VCC = MAX 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) Symbol Parameter Limits Unit Test ConditionsSymbol Parameter Min Typ Max Unit Test Conditions fMAX Maximum Clock Frequency 30 45 MHz VCC = 5.0 V C L = 15 pFtPLH tPHL Clock, Clear, Set to Output 15 20 ns VCC = 5.0 V C L = 15 pFtPLH tPHL Clock, Clear, Set to Output 15 20 ns C L = 15 pF AC SETUP REQUIREMENTS (TA = 25°C) Symbol Parameter Limits Unit Test ConditionsSymbol Parameter Min Typ Max Unit Test Conditions tW Clock Pulse Width High 20 ns VCC = 5.0 V tW Clear Set Pulse Width 25 ns VCC = 5.0 V ts Setup Time 20 ns VCC = 5.0 V th Hold Time 0 ns