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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 402

Design considerations for RS232 interfaces

Sean Gold

Abstract

Design considerations for RS232 interfaces are discussed.

Keywords

RS232 interface design

RS232 transceiver

LT1180

Introduction

When designing an RS232 interface, it is necessary to conform to standards published by the Electronics Industry Association, EIA RS232.V28. Some key specifications are summarized in Table 402.1. However, the EIA specifications are often just the beginning of the design. Practical problems such as generating RS232 signal levels, providing sufficient load drive, and ensuring protection against fault conditions must also be considered.

Table 402.1

Key RS232 Transceiver Specifications (EIA RS232C. V28)

SPECIFICATIONS VALUE UNITS

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