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  • How does TTL serial work? - Electrical Engineering Stack Exchange
    Point of terminology: "TTL serial" is a severely over-broad term, " (point-to-point) asynchronous serial (at TTL levels)" seems to be what you're asking about (Though that's still probably lacking, but at least better)
  • Does TTL output specify the maximum current it can source?
    TTL-compatible inputs and outputs can be made with CMOS structures If you look at the datasheets for a 74HC04 and 74HCT04, you will see the different input voltage ranges AND - to your specific question - No These days, when a component or device specifies a TTL output, it is referring to the voltage levels only
  • digital logic - What is meant by TTL in this context? - Electrical . . .
    TTL requires that logic 1 input must be at least 2V, and TTL drivers are designed to guarantee that That is far short of what this driver requires to register as logic 1
  • 什么叫TTL电平？ - 知乎
    TTL电平信号被利用的最多是因为通常数据表示采用二进制规定，+5V等价于逻辑"1"，0V等价于逻辑"0"，这就被称做TTL (晶体管-晶体管逻辑电平)信号系统，这是计算机处理器控制的设备内部各部分之间通信的标准技术。
  • USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these and . . .
    TTL mean Transistor-Transistor-Logic and has its level for logical zero near 0V and for logical one near 5V Often any 5V logic is called TTL, although most circuits nowadays are built as CMOS Today there are also many circuits that work at 3 3V, which is no longer TTL
  • rs232 - What is the difference between RS-232 and TTL UART . . .
    A TTL UART will output (and input) only TTL levels, essentially 0 bit = 0V and 1 bit = 5V And many modern-day gadgets (Arduino, et al ) simply use TTL voltage levels for serial communication
  • 域名解析中“TTL”是什么意思？ - 知乎
    在域名解析中，"TTL" 代表 "Time To Live"（生存时间）。它是一个设置值，用来指定域名系统（DNS）中一个特定的记录在DNS缓存中可以存留多长时间，直到它过期并需要从权威源再次获取更新的信息。 TTL的作用： 缓存管理： TTL值告诉其他服务器（例如用户的ISP或企业网络中的DNS服务器）该缓存该DNS记录
  • TTL NAND gate analysis - Electrical Engineering Stack Exchange
    TTL Now Q1 works in a very strange "inverse active mode" because everything is upside down - the emitter is "pulled up" to 5V, the base is "lifted" to the middle, and the collector is at its lowest voltage Indeed, Q1 works like a transistor but we don't want that because its emitter consumes some (although small) current from the previous stage
  • 带你一分钟了解编码器基础知识
    此外，增量编码器的信号输出电平标准也是多样的，常见的有TTL、HTL、PNP和NPN等。 TTL和HTL是常见的电平标准，其中TTL为长线差分驱动，而HTL也称为推拉式或推挽式输出，适用于工业控制系统。 PNP和NPN则是集电极开路输出的两种类型，用于不同的电路连接需求。
  • 既然IP数据包有TTL跳数限制，那它是如何实现远距离（横跨大半个地球）通信的？ - 知乎
    既然IP数据包有TTL跳数限制，那它是如何实现远距离（横跨大半个地球）通信的？ 首先对问题进行补充解释一下:IP数据包有TTL跳数限制，跳数变为零时数据包就被丢弃。 那么问题来了，当需要远距离访问时，例如位于北京的我访问大洋彼岸的N… 显示全部 关注者 28





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