MAX220MJE

Overview

The MAX220MJE is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within an industrial temperature range of -55°C to +125°C and utilizes a 16-pin CERDIP package. The device features two drivers and two receivers with Schmitt trigger inputs for noise immunity. It includes an integrated charge pump that generates internal ±10V rails from a single +5V supply, eliminating the need for external bipolar power sources. Electrical specifications include a typical data rate of 120kbps, transmitter output voltage swings of ±8V, and receiver input thresholds between 0.8V and 2.4V.

Feature Summary

• Integrated dual charge-pump circuitry converts a single +5V supply into internal ±10V rails for RS-232 signaling without requiring external bipolar power supplies.

Applications

• Interface translation between TTL/CMOS logic levels and RS-232 standards
• Multidrop RS-232 communication networks
• Portable diagnostics equipment

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm the exact package type and temperature rating. Ensure compliance with relevant environmental directives such as RoHS before procurement. Cross-reference the component marking with the datasheet pinout to validate authenticity and correct part identification.

Selection Notes

Select this component when designing systems that require RS-232 connectivity but lack access to negative voltage rails. The integrated charge pump simplifies board layout by removing the need for external inductors or complex power generation circuits. Verify that the required data rates and channel counts align with the device's two-driver and two-receiver configuration.

Part Context

This component belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various configurations with different numbers of channels and packages. The MAX220 specifically provides a dual-channel solution suitable for standard serial communication applications.

Replacement Considerations

Direct replacements within the same family include the MAX220CPE, MAX220ESE, and MAX220WE. These variants share identical electrical characteristics but differ in operating temperature ranges and physical packaging styles.