MM54HC4020/MM74HC402014-Stage Binary CounterMM54HC4040/MM74HC404012-Stage Binary CounterGeneral Des criptionThe MM54HC4020/MM74HC4020, MM54HC4040/MM74HC4040, are high speed binary ripple carry counters.These counters are implemented utilizing advanced silicongateCMOS technology to achieve speed performance similarto LS-TTL logic while retaining the low power and highnoise immunity of CMOS.The 'HC4020 is a 14 stage counter and the 'HC4040 is a 12-stage counter. Both devices are incremented on the fallingedge (negative transition) of the input clock, and all theiroutputs are reset to a low level by applying a logical high ontheir reset input.These devices are pin equivalent to the CD4020 andCD4040 respectively. All inputs are protected from damagedue to static discharge by protection diodes to VCC andground.FeaturesY Typical propagation delay: 16 nsY Wide operating voltage range: 2±6VY Low input current: 1 mA maximumY Low quiescent current: 80 mA maximum (74HC Series)Y Output drive capability: 10 LS-TTL loads
猜您喜欢
推荐内容
开源项目推荐 更多
热门活动
热门器件
用户搜过
随便看看
热门下载
热门标签
评论