可能有很多读者都还不知道 TTL、RS232、485 到底是什么，本节简单概述一下它们是什么。 TTL：Transistor Transistor Logic，晶体管-晶体管逻辑电平。 比如：0V代表逻辑低电平，5V代表逻辑高电平。像STM32单片机串口引脚输出的逻辑高电平就是3.3V。 你可能会问：什么是 ...

可能有很多读者都还不知道 TTL、RS232、485 到底是什么，本节简单概述一下它们是什么。 1.TTL电平 TTL：Transistor Transistor Logic，晶体管-晶体管逻辑电平。 比如：0V代表逻辑低电平，5V代表逻辑高电平。像STM32单片机串口引脚输出的逻辑高电平就是3.3V。 你可能会问 ...

有源晶振的常见输出波形有分为单端和差分。单端有CMOS/TTL输出，输出功率大，驱动能力强，主要应用在数字通信系统时钟上 ...

When starting a new electronics project today, one of the first things that we tend to do is pick the integrated circuits that make up the core of the design. This can be anything from a ...

Since you can now get CMOS parts with comparable speeds to these TTL parts, why would anyone continue to use TTL? In fact, there a few reasons… Since you can now get CMOS parts with comparable speeds ...

The fun part about logic gates is that there are so many ways to make them, with each approach having its own advantages and disadvantages. Although these days transistor-transistor logic (TTL) is the ...

Transistor-transistor-logic or TTL parts have been around for a long time and now and then, I still seem to run across this or that “thing” where they've been designed in, not necessarily in the ...