MAX220EWE

Overview

The MAX220EWE+ is a dual driver and receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply using an integrated charge pump to generate internal ±10V rails, eliminating the need for external bipolar supplies. The device provides full duplex communication with two drivers and two receivers in a 16-pin Wide SOIC package. Electrical specifications include a data rate of up to 120 kbps, a supply voltage range of 4.5V to 5.5V, and an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry enables single-supply operation without requiring external bipolar power sources.
• Provides full-duplex RS-232 communication through dedicated transmitter and receiver channels.
• Designed for EIA/TIA-232E and V.28/V.24 interface standards.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'EWE+' against the manufacturer's current ordering information to confirm the exact package type (Wide SOIC) and industrial temperature rating (-40°C to +85°C). Ensure that the required external capacitors match the datasheet recommendations for the MAX220 variant to maintain proper voltage conversion performance.

Selection Notes

Select this component when designing systems limited to a single +5V power rail where generating internal high voltages is necessary. Verify that the required channel count matches the dual-driver/dual-receiver configuration. Confirm that the 120 kbps data rate meets the application requirements and that the Wide SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the MAX220–MAX249 family of multichannel RS-232 drivers and receivers. The family shares common architecture features such as internal charge pumps and single-supply operation. Specific variants within the family differ in channel counts, shutdown capabilities, and capacitor integration levels.

Replacement Considerations

Direct functional substitutes within the same family include the MAX232EWE+ and MAX201EWE+. These parts share similar pinouts and operational principles but may differ in channel configurations or specific electrical characteristics. Verify compatibility before substitution.