器件名称:
MC74AC4020D
功能描述:
14-STAGE BINARY RIPPLE COUNTER
文件大小:
141.47KB 共5页
简 介:
MC74AC4020 14Stage Binary Ripple Counter The MC74AC4020 consists of 14 master-slave flip-flops with 12 stages brought out to pins. The output of each flip-flop feeds the next and the frequency at each output is half that of the preceding one. The state of the counter advances on the negative-going edge of the Clock input. Reset is asynchronous and active-high. State changes of the Q outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and may have to be gated with the Clock of the MC74AC4020 for some designs. 140 MHz Typ. Clock Outputs Source/Sink 24 mA Operating Voltage Range: 2.0 to 6.0 V High Noise Immunity VCC 16 Q11 15 Q10 14 Q8 13 Q9 12 RESET CLK 11 10 Q1 9 14-STAGE BINARY RIPPLE COUNTER N SUFFIX CASE 648-08 PLASTIC 1 Q12 2 Q13 3 Q14 4 Q6 5 Q5 6 Q7 7 Q4 8 GND D SUFFIX CASE 751B-05 PLASTIC FUNCTION TABLE Clock Reset L L X H Output State No Change Advance to next state All Outputs are low CLOCK LOGIC DIAGRAM 9 7 5 4 10 6 13 12 14 15 1 2 3 11 Q1 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 RESET PIN 16 = VCC PIN 8 = GND FACT DATA 5-1 MC74AC4020 MAXIMUM RATINGS* Symbol VCC Vin Vout Iin Iout ICC PD Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC VCC or GND Current per Output Pin Power Dissipation in Still Air Plastic** SOIC Package** Storage Temperat……
