Voltage Standards

TTL, RS232, and RS485 Voltage Standards

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TTL, RS232, and RS485 Voltage Standards

▼Click the card below to follow our official account▼ TTL, RS232, and RS485 are representations of logic levels, which are three different voltage standards for serial communication. TTL TTL: Full duplex (5V system, logic 1: 2.4V–5V, logic 0: 0V–0.5V). TTL refers to Transistor-Transistor Logic circuits. Many “USB to TTL” modules available on the market are … Read more

Confused About Serial Ports/UART/RS-232/RS-485? Understand All the Differences in 3 Minutes! (Embedded Classroom)

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Confused About Serial Ports/UART/RS-232/RS-485? Understand All the Differences in 3 Minutes! (Embedded Classroom)

A serial port (COM port) is a general term, UART is a protocol, and TTL/RS-232/RS-485 are voltage standards. Data using the UART protocol is transmitted through TTL (board-level short distance), RS-232 (± voltage anti-interference), or RS-485 (differential long distance multi-device) voltage standards, while COM port is the name given by Windows to this type of … Read more