Motorola MC74AC112/MC74ACT112 Dual JK Flip-Flop Datasheet

The MC74AC112/74ACT112 consists of two high-speed completely independent transition clocked JK flip-flops. The clocking operation is independent of rise and fall times of the clock waveform. The JK design allows operation as a D flip-flop (refer to MC74AC74/74ACT74 data sheet) by connecting the J and K inputs together. Asynchronous Inputs: LOW input to SD (Set) sets Q to HIGH level LOW input to CD (Clear) sets Q to LOW level Clear and Set are independent of clock Simultaneous LOW on CD and SD makes both Q and Q HIGH • Outputs Source/Sink 24 mA • ′ACT112 Has TTL Compatible Inputs CP VCC CP1 K1 J1 SD1 Q1 Q1 CD1 CD2 CP2 K2 J2 SD2 CD J Q Q2 SD CONNECTION DIAGRAM Q2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 K Q CP SD K Q CD J Q MODE SELECT — TRUTH TABLE Operating Mode Inputs Outputs Operating Mode SD CD J K Q Q Set L H X X H L Reset (Clear) H L X X L H *Undetermined L L X X H H Toggle H H h h q q Load “0” (Reset) H H l h L H Load “1” (Set) H H h l H L Hold H H l l q q H, h = HIGH Voltage Level L, l = LOW Voltage Level X = Don’t Care l, h (q) = Lower case letters indicate the state of the referenced input (or output) one set-up time prior to the HIGH to LOW clock transition. *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.

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