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概述: 以前,由于CMOS器件运行速度较慢,而被大多数系统设计师所忽略。除了一些特殊情况外,CMOS技术所具有的优点未得以应用. 然而,CMOS技木现在已经历了一扬引人注目的革命,它悄悄地为过去不重视CMOS技术的设计者们提供了越来越多的产品.新的高速CMOS器件与LSTTL的管脚完全相同,并与LSTTL的运行速度很接近。CMOS器件具有比TTL器件高2倍的抗干扰能力,宽工作温度范围和低功耗,还具有比LSTTL器件高2倍的允许电源误差而可使用小型廉价电源设备等优点.74C00芯片的一个CMOS“与非门”最大的传输延迟时间为90ns.而现在的74HC00的延迟时间只有15ns.
Overview: In the past, CMOS devices were overlooked by most system designers due to their slower operation. Except for some special cases, the advantages of CMOS technology have not been applied. However, CMOS technology has now undergone a remarkable revolution, which quietly provided designers who did not attach importance to CMOS technology in the past The more products, the new high-speed CMOS devices have exactly the same pins as the LSTTLs and are very close to the LSTTLs. CMOS devices offer twice the interference immunity, wider operating temperature range and lower power consumption than TTL devices, as well as two times the allowable power supply error of LSTTL devices and the ability to use small, inexpensive power supplies. A CMOS on the 74C00 chip “Nandian” the maximum transmission delay time is 90ns, while the current 74HC00 delay time of only 15ns.