MAX231EPD+

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Interface - Drivers, Receivers, Transceivers encompasses multiple types of components that enable devices to communicate. MAX231EPD+ is an integrated circuit (IC) that it is often used to enable communication between two devices. This application brief will provide a description of the application field and working principle of the MAX231EPD+.

Application Field

The MAX231EPD+ is a dual RS-232 driver and receiver. It is designed to provide a complete interface between the RS-232 signals and the signal levels of both standard TTL logic and CMOS logic circuits. Additionally, it is designed to support two drivers and two receivers, and is located in a 17-pin package or a 8-pin package. Therefore, it is the perfect choice for short-haul, point-to-point communication such as for modems, bar code scanners and other peripherals.

Working Principle

The drivers and receivers of the MAX231EPD+ operate in the following manner:

• The RS-232 drivers on the MAX231EPD+ use a high-level output voltage of 10V. They convert TTL/CMOS logic-level signals into RS-232 voltage levels.
• The receivers use a reference voltage, typically 5 volst, to convert incoming RS-232 signals into TTL or CMOS compatible logic levels. The receiver input threshold voltage is typically 1.3V when the reference voltage is 5V.
• The MAX231EPD+ also includes an EMI Reduction Circuit designed to reduce EMI (electromagnetic interference) from external sources

Conclusion

The MAX231EPD+ is a dual RS-232 driver and receiver, providing a complete interface between RS-232 signals and the signal levels of both standard TTL logic and CMOS logic circuits. It is ideal for short-haul, point-to-point communication, such as for modems, barcode scanners, and other peripherals. Furthermore, the MAX231EPD+ also includes an EMI reduction circuit designed to reduce EMI from external sources. The advantages described above make the MAX231EPD+ an ideal choice for communication and connection between devices.

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