MAX234CWE+T

Overview

The MAX234CWE+T is a +5V-powered, quad RS-232 driver and receiver interface IC manufactured by Analog Devices Inc. (formerly Maxim Integrated). It operates within the commercial temperature range of 0°C to +70°C and utilizes a 16-pin Wide SOIC package. The device integrates dual charge-pump circuits that generate internal ±10V rails from a single +5V supply, eliminating the need for external bipolar power sources. Electrical specifications include an RS-232 input voltage operating range of ±30V, typical transmitter output voltage swings of ±8V under load, and data rates up to 116kbps.

Feature Summary

• Integrates dual charge-pump DC-DC converters to generate internal ±10V operation from a single +5V supply
• Provides four independent drivers and four receivers for full RS-232 communication channels
• Features high noise immunity with ±30V rated receiver inputs

Applications

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

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm compliance with RoHS standards and lead-free manufacturing processes. Ensure the component matches the exact package dimensions and pinout configuration required for the target printed circuit board layout before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require multiple RS-232 channels but lack access to negative voltage supplies. The integrated charge pump simplifies the bill of materials by removing the requirement for external capacitors in some configurations, though standard designs typically utilize external timing capacitors. Confirm that the maximum data rate requirements do not exceed the specified limits for the selected operating temperature range.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 communications. The family offers various channel counts and control features across different packages. The MAX234 variant specifically provides four channels, making it suitable for applications requiring more than two serial lines without increasing the footprint significantly compared to dual-channel alternatives.

Replacement Considerations

Direct replacements within the same family include the MAX234CWE-T or MAX234CWE+. Verify that any substitute maintains the identical 16-pin Wide SOIC footprint and compatible electrical characteristics to ensure seamless integration into existing hardware designs.