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 …
Does TTL output specify the maximum current it can source?
Jan 24, 2026 · 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 …
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 …
Wiring for 5 V TTL signal via 3.3 V UART to Ethernet adapter
Feb 8, 2026 · That display has a 5 V TTL output for the readings, that I want to convert to Ethernet using a (3.3 V) UART TO ETH adapter from Waveshare to eventually use in my home automation server in …
TTL和CMOS电路输入端电压多少可认为高电平（低电平）？
TTL指的是由晶极管构成的 数字芯片。这类芯片功耗高，通常的TTL电平是5V。 CMOS是指由 MOS管 构成是数字芯片。这类芯片功耗低。电平太多了有5V，3.3V，1.8V，1.2V。 你问的高低电平的阈值是 …
问一下大家什么是USB转TTL？ - 知乎
Aug 15, 2020 · USB转TTL是一种 串口通信 转换器，它可以将USB接口转换为TTL串口通信接口。 TTL串口通信是一种常见的数字通信方式，常用于单片机、传感器等设备之间的数据传输。 通过USB …
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 …
digital logic - What is meant by TTL in this context? - Electrical ...
Jun 22, 2023 · 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.
USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these and ...
Aug 14, 2012 · 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 …
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 …
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 …