![]() The RS-232 standard was developed by the EIA (Electrical Industries Association), and it defines requirements for connecting DCE (data communications equipment - modems, converters, etc.) and DTE (data terminal equipment - computers, controllers, etc.) devices. RS-232, also known as RS-232C and TIA/EIA-232-E, is a group of electrical, functional, and mechanical specifications for interfaces between computers, terminals, and modems. Additionally, it will provide some details about USB-C, USB 4.0, and Thunderbolt 3. This article will provide an overview of the RS-232 and RS-485 serial interfaces and highlight the key differences. ![]() Both are still used in a variety of applications. ![]() Surprisingly, these legacy interfaces aren’t obsolete. Two of the oldest interfaces are RS-232 and RS-485. There are also higher-speed interfaces you’re probably familiar with like Ethernet, USB, FireWire, HDMI, and Thunderbolt. Most were developed for specific applications, but some of these interfaces have become common, such as I2S, LIN, CAN, SPI, Flex, MOST, and I2C. ![]() Today, there are plenty of serial interfaces. ![]()
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