14级二进制计数器12级二进制计数器 14-Stage Binary Counter 12-Stage Binary Counter
General Description
The MM74HC4020, MM74HC4040, are high speed binary ripple carry counters. These counters are implemented utilizing advanced silicon-gate CMOS technology to achieve speed performance similar to LS-TTL logic while retaining the low power and high noise immunity of CMOS.
The MM74HC4020 is a 14 stage counter and the MM74HC4040 is a 12-stage counter. Both devices are incremented on the falling edge negative transition of the input clock, and all their outputs are reset to a low level by applying a logical high on their reset input.
These devices are pin equivalent to the CD4020 and CD4040 respectively. All inputs are protected from damage due to static discharge by protection diodes to VCC and ground.
Features
■ Typical propagation delay: 16 ns
■ Wide operating voltage range: 2–6V
■ Low input current: 1 µA maximum
■ Low quiescent current: 80 µA maximum 74HC Series
■ Output drive capability: 10 LS-TTL loads
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
MM74HC4020N Fairchild 飞兆/仙童 | 当前型号 | 当前型号 |
CD74HC4020E 英特矽尔 | 功能相似 | MM74HC4020N和CD74HC4020E的区别 |