MAX220EWE+

Overview

The MAX220EWE+ is a dual driver and dual receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply utilizing an integrated charge pump to generate the required ±10V internal voltages, eliminating the need for external bipolar supplies. The device supports data rates up to 200kbps with full duplex communication. It features a 16-pin Wide SOIC package and operates within a temperature range of -40°C to +85°C. Electrical specifications include a typical transmitter output voltage swing of ±8V and a receiver input operating range of ±30V.

Feature Summary

• Integrated charge pump circuitry enables single-supply operation without requiring external bipolar power sources
• Provides full-duplex RS-232 communication with two independent drivers and receivers
• Supports standard EIA/TIA-232E and V.28/V.24 interface protocols

Applications

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

Procurement Notes

Verify the specific suffix 'E' confirms the extended industrial temperature range (-40°C to +85°C) and 'WE+' indicates the 16-pin Wide SOIC lead-free package. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ordering details match the exact component designation to avoid functional discrepancies in voltage generation or pinout configuration.

Selection Notes

Select this component when board space constraints prevent the use of discrete charge pump circuits or bipolar power supplies. It is suitable for applications requiring reliable RS-232 communication at speeds up to 200kbps. Consider alternative family members if integrated capacitors or shutdown modes are required, as the MAX220 requires external timing capacitors for its internal voltage conversion stages.

Part Context

The MAX220 belongs to the broader MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. This family shares common architecture but varies in channel count, capacitor integration, and control features. The MAX220 specifically serves as a foundational dual-channel solution designed for general-purpose serial communication where external components are permitted to optimize cost and layout flexibility.

Replacement Considerations

Public confirmed substitute part numbers: MAX232EWE+, MAX201EWE+, MAX202EEWE+. Verify pin compatibility and electrical parameters before substitution.