MAX3222CPW

The MAX3222CPW IC is a low power, wide common-mode voltage range, RS-232 line driver and receiver IC. Manufactured using advanced CMOS technology, it offers cost-efficient RS-232 and V.28/V.24 communications interfaces without the need for external transistors or transformers. Applications for the MAX3222CPW include personal and notebook computers, modems, POS terminals, printers, and industrial control and instrumentation.

Applications

The MAX3222CPW applications include but are not limited to:

• Personal and notebook computers
• Modems
• POS terminals
• Printers
• Industrial control and instrumentation
• Automotive communication systems
• Data acquisition systems
• Medical equipment

Features

The MAX3222 allows for cost-effectively and quickly implementing RS-232 and V.24/V.28 interfaces. It offers these features:

• Wide common-mode voltage range: –7 V to +12 V
• Low power dissipation of 500 µW
• Industrial temperature range: –40°C to +85°C
• 3.0-V to 5.5-V single-supply operation
• Low shutdown current of <1 µA
• Built-in cable overvoltage and undervoltage protection
• Height-reduced package for miniature system design (MSOP-10, SOT-23-5, TDFN-10)
• 100 Kbps data rate

Working Principle

The MAX3222CPW works on the principle of line-driving and line-receiving. It contains two line drivers, which convert the input logic signals to RS-232 voltage levels, and two complementary line receivers, which convert the RS-232 levels to logic signals. The MAX3222CPW is designed to minimize the power dissipation with a low quiescent supply current. This is achieved by placing the drivers in a standby mode when data is not being transmitted. The drivers are enabled when the input is asserted and disabled when the input is deasserted. This feature reduces driver power dissipation.

Conclusion

The MAX3222CPW is a low-power, wide-common-mode voltage range, RS-232 line driver and receiver IC that provides cost-effective and quick implementation of RS-232 and V.24/V.28 interfaces. It offers a wide range of applications from personal and notebook computers, modems, POS terminals, printers, and industrial control and instrumentation to automotive communication systems, data acquisition systems, and medical equipment. The MAX3222CPW works on the principle of line-driving and line-receiving and is designed to minimize power dissipation with a low quiescent supply current.