MAX244CQH+TD

Overview

The MAX244CQH+TD is a multichannel RS-232 transceiver from the MAX220–MAX249 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and integrates dual charge-pump DC-DC converters to generate internal ±10V rails for RS-232 signaling. The device features eight drivers and ten receivers in a PLCC-44 package. Electrical specifications include a maximum data rate of 120 kbps, transmitter output voltage swings of ±7.5V under load, and receiver input operating ranges up to ±25V. It supports full-duplex communication with TTL/CMOS-compatible logic levels.

Feature Summary

• Integrates dual charge-pump circuitry to eliminate the need for external bipolar power supplies
• Enables single-supply operation using only a +5V source
• Provides multiple independent enable controls for selective driver and receiver activation

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network implementations
• Portable diagnostics equipment requiring compact form factors

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer engagement. Confirm that the PLCC-44 package matches the target PCB footprint and that the temperature rating aligns with operational requirements. Ensure compliance with relevant environmental directives before integration into final assemblies.

Selection Notes

Select this component when designing systems requiring high channel density within limited board space. The integrated charge pumps simplify power architecture by removing external inductors or transformers. Verify that the 120 kbps data rate meets application timing constraints and that the PLCC-44 package is compatible with available assembly processes.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered line drivers and receivers. These components are engineered for EIA/TIA-232E and V.28/V.24 interfaces where standard ±12V supplies are unavailable. The family offers various pin counts and control configurations to accommodate diverse interface topologies.

Replacement Considerations

Compatible substitutes within the same family include the MAX245, MAX246, MAX247, MAX248, and MAX249. These parts share identical electrical characteristics and package options but differ in the number of available drivers and receivers.