器件名称:
MC74F112N
功能描述:
DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP
文件大小:
83.35KB 共3页
简 介:
MC74F112 DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP The MC74F112 contains two independent, high-speed JK flip-flops with Direct Set and Clear inputs. Synchronous state changes are initiated by the falling edge of the clock. Triggering occurs at a voltage level of the clock and is not directly related to the transition time. The J and K inputs can change when the clock is in either state without affecting the flip-flop, provided that they are in the desired state during the recommended setup and hold times relative to the falling edge of the clock. A LOW signal on SD or CD prevents clocking and forces Q or Q HIGH, respectively. Simultaneous LOW signals on SD and CD force both Q and Q HIGH. CONNECTION DIAGRAM VCC CD1 CD2 CP2 16 15 14 13 K2 12 J2 11 SD2 10 Q2 9 16 1 DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP FAST SCHOTTKY TTL J SUFFIX CERAMIC CASE 620-09 C K D Q CP Q J SD 1 CP1 2 K1 3 J1 4 SD1 5 Q1 S J D Q CP K Q CD 6 Q1 7 Q2 8 GND 16 N SUFFIX PLASTIC CASE 648-08 1 FUNCTION TABLE (Each Half) Inputs @ tn J L L H H Asynchronous Inputs: LOW Input to SD sets Q to HIGH level LOW Input to CD sets Q to LOW level Clear and Set are independent of clock Simultaneous LOW on CD and SD makes both Q and Q HIGH H = HIGH Voltage Level L = LOW Voltage Level tn = Bit time before clock pulse tn + 1 = Bit time after clock pulse Output @ tn + 1 Q Qn L H Qn 16 1 D SUFFIX SOIC CASE 751B-03 K L H L H ORDERING INFORMATION MC74FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC LOGIC SYMBOL 4 3 1 2……
