器件名称:
MC74AC109
功能描述:
DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP
文件大小:
197.92KB 共6页
简 介:
MC74AC109 MC74ACT109 Dual JK Positive EdgeTriggered FlipFlop The MC74AC109/74ACT109 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 ′ACT109 Has TTL Compatible Inputs VCC 16 CD2 15 CD DUAL JK POSITIVE EDGE-TRIGGERED FLIP-FLOP N SUFFIX CASE 648-08 PLASTIC Q2 9 J2 14 J K2 13 K CP2 12 CP SD2 11 SD Q2 10 Q Q PIN NAMES CD1 J1 K1 CP1 SD1 Q1 Q1 1 CD1 2 J1 3 K1 4 CP1 5 SD1 6 Q1 7 Q1 8 GND J1, J2, K1, K2 CP1, CP2 CD1, CD2 SD1, SD2 Q1, Q2, Q1, Q2 Data Inputs Clock Pulse Inputs Direct Clear Inputs Direct Set Inputs Outputs D SUFFIX CASE 751B-05 PLASTIC LOGIC SYMBOL TRUTH TABLE Inputs SD L H L H H H H H CD H L L H H H H H CP X X X J X X X L H L H X K X X X L L H H X Outputs Q H L H L Q Q SD J CP K Q CD L L H H H Toggle Q0 Q0H L Q0 Q0- Q SD J CP Q CD K H = HIGH Voltage Level L = LOW Voltage Level = LOW-to-HIGH Clock Transition X = Immaterial Q0(Q0) = Previous Q0(Q0) before LOW-to-HIGH Transition of Clock FACT DATA 5-1 MC74AC109 MC74ACT109 LOGIC DIAGRAM (one half shown) SD K Q CP Q J CD P……
