RS232 is a standard for conveying data over a simple unterminated, multiconductor cable at rates up to 20kB. It specifies the electrical characteristics and connector for an all encompassing point-to-point modem interface. The standard has been expanded for use as a general purpose serial interface at data rates up to 1MB.
This document provides an overview of the RS232 (TIA/EIA-232-F) standard, detailing its capabilities to convey data over multiconductor cables at rates up to 1MB. It specifies electrical characteristics such as maximum voltage applied to driver output and receiver input sensitivity, along with termination requirements.
| Maximum Data Rate | 1MB/s (general purpose) |
|---|---|
| Original Maximum Data Rate | 20kB/s |
| Maximum Voltage Applied to Driver Output | +/- 25V |
| Driver Output Signal Minimum Loaded | +/- 5V |
| Termination Resistance | 3k Ohm to 7k Ohm |
The standard supports data rates up to 1MB/s for general use, though the original specification was intended for modems at up to 20kB/s.
The maximum voltage applied to the driver output is +/- 25V.