SN54/74LS112A DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP The SN54 / 74LS112A dual JK flip-flop features individual J, K, clock, and asynchronous set and clear inputs to each flip-flop. When the clock goes HIGH, the inputs are enabled and data will be accepted. The logic level of the J and K inputs may be allowed to change when the clock pulse is HIGH and the bistable will perform according to the truth table as long as minimum set-up and hold time are observed. Input data is transferred to the outputs on the negative-going edge of the clock pulse. DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP LOW POWER SCHOTTKY LOGIC DIAGRAM (Each Flip-Flop) J SUFFIX CERAMIC CASE 620-09 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD MODE SELECT -- TRUTH TABLE INPUTS OUTPUTS Ceramic Plastic SOIC 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 LOGIC SYMBOL * 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, I = LOW Voltage Level X = Don't Care l, h (q) = Lower case letters indicate the state of the referenced input (or output) l, h (q) = one set-up time prior to the HIGH to LOW clock transition. 5-185 FAST AND LS TTL DATA SN54/74LS112A 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 Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IIH IIL Input HIGH Current Input LOW Current Min 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 Set, Clear Clock 20 60 80 A VCC = MAX, VIN = 2.7 V J, K Set, 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 J, K Clear, Set, Clk IOS Short Circuit Current (Note 1) ICC Power Supply Current - 20 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25C, VCC = 5.0 V) Limits Symbol Parameter fMAX Maximum Clock Frequency tPLH tPHL Propagation Delay, Clock Clear, Set to Output Min Typ 30 45 Max Unit Test Conditions MHz 15 20 ns 15 20 ns Max Unit VCC = 5.0 V CL = 15 pF AC SETUP REQUIREMENTS (TA = 25C, VCC = 5.0 V) 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 5-186 Test Conditions VCC = 5.0 V Case 751B-03 D Suffix 16-Pin Plastic SO-16 -A- "! ! " " ! " # 1 %# ) ! !" $ !" 8 C -T- D M K " ! #! J F ! Case 648-08 N Suffix 16-Pin Plastic R X 45 G " ! ) #! P ! " " 9 -B- ! 16 & ! ! ( ( ( ( "! ! " " ! ! ' " " ! ' ! " # & -A- 16 9 1 8 ! ! $ ! B # ) " ! " # ) !" $ !" ) F L C S -T- K H G M J D " Case 620-09 J Suffix 16-Pin Ceramic Dual In-Line -A- ! ! ! ! "! ! " 16 " ) " L K M N J G D " $ " $ ! " " ! ! FAST AND LS TTL DATA 5-187 & # ) !" $ !" ) -T $ " " C F & 8 E ! ! ! " " -B1 & 9 * * ! ! ! ! * * ! ! 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Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. FAST AND LS TTL DATA 5-188