MAX240CMH

Overview

The MAX240CMH+TD is a full RS-232 transceiver featuring five drivers and five receivers in a 44-MQFP package. It operates on a single +5V supply, utilizing internal charge pumps to generate ±10V for RS-232 signaling without external components. The device supports data rates up to 120Kbps with a receiver hysteresis of 500mV. Operating temperature ranges from 0°C to +70°C, and it complies with RoHS3 standards.

Feature Summary

• Integrates dual charge-pump DC-DC voltage converters to eliminate the need for bipolar ±12V supplies
• Enables single-supply operation directly from a +5V source
• Includes integrated capacitors to minimize printed circuit board space requirements

Applications

• Interface translation between TTL/CMOS logic and RS-232 protocols
• Multidrop RS-232 communication networks
• Portable diagnostics equipment requiring compact form factors

Procurement Notes

Verify the specific suffix '+TD' against official Analog Devices documentation to confirm tape-and-reel packaging and lead-free status. Confirm current production status as the base MAX240 family may have obsolescence notices. Ensure the 44-MQFP footprint matches the target design constraints before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring five independent transmit and receive channels within a single IC. Verify that the 44-pin MQFP package dimensions fit the available PCB area. Ensure the application environment remains within the specified 0°C to +70°C operating range for optimal performance.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family provides various channel configurations and package options to accommodate different interface density requirements while maintaining compatibility with standard EIA/TIA-232E and V.28/V.24 communication protocols.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.