Motorola SN54LS112A
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.SN54/74LS112A DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP 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 Q 5(9) 6(7) Q CLEAR (CD) 15(14) J 3(11) 1(13) CLOCK (CP) 4(10) K 2(12) SET (SD) 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION MODE SELECT — TRUTH TABLE INPUTS OPERATING MODE SD Set Reset (Clear) *Undetermined Toggle Load “0” (Reset) Load “1” (Set) Hold L H L H H H H CD H L L H H H H J X X X h l h l K X X X h h l l Q H L H q L H q Q L H H q H L q OUTPUTS SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LOGIC SYMBOL 4 10 3 J CP SD Q 5 11 J CP SD Q 9 1 13 Q 6 12 * 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.