ttl
TTL是TimeToLive的缩写，该字段指定IP包被路由器丢弃之前允许通过的最大网段数量。TTL是IPv4报头的一个8bit字段。
ttl 热门资料
74145 TTL BCD—十进制译码、驱动器
These BCD-to-decimal decoders/drivers consist of eightinverters and ten, four-input NAND gate...
74145 TTL BCD—十进制译码、驱动器
These BCD-to-decimal decoders/drivers consist of eightinverters and ten, four-input NAND gate...
7409 TTL集电极开路2输入端四与门
This device contains four independent gates each of whichperforms the logic AND function. The...
7416 TTL开路输出六反相缓冲、驱动器
This device contains six independent gates each of whichperforms the logic INVERT function. T...
7417 TTL开路输出六同相缓冲、驱动器
These monolithic TTL hex buffers/drivers feature high-voltage open-collector outputs for interfacing...
电路常识性概念-TTL与CMOS集成电路
1、TTL电路TTL电路以双极型晶体管为开关元件，所以又称双极型集成电路。双极型数字集成电路是利用电子和空穴两种不同极性的载流子进行电传导的器件。它具有速度高（开关速度快）、驱动能力强等优点，但其功耗较大，集成度相对较低。根据应用领域的不同...