MAX236MRG

Overview

The MAX236MRG is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 120kbps in normal operation. The device features an integrated dual charge-pump DC-DC converter that generates internal ±10V rails from the single +5V input, eliminating the need for external bipolar supplies. It includes two drivers and two receivers with TTL/CMOS-compatible inputs and outputs. The component is housed in a 28-pin Wide SO package and is rated for industrial temperature ranges.

Feature Summary

• Integrated dual charge-pump circuitry eliminates the requirement for external bipolar power supplies
• Enables single +5V supply operation while generating internal ±10V drive voltages
• Provides full RS-232 compliance with robust ±30V input protection on receiver pins

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 communication networks
• Portable diagnostic equipment requiring low-power serial connectivity

Procurement Notes

Verify the specific suffix 'MRG' against the manufacturer's current ordering information to confirm the exact package type and temperature grade. Confirm RoHS compliance status as manufacturing processes may update over time. Ensure the source document matches the requested part number exactly before procurement.

Selection Notes

Select this component when board space is limited due to its integrated charge pump design. It is suitable for applications where only a +5V supply is available. Compare propagation delays and slew rates against system timing requirements. Verify that the 28-pin Wide SO package fits the target PCB layout constraints.

Part Context

This device belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various channel configurations and package options to accommodate different integration needs. The MAX236 specifically provides a balanced configuration of drivers and receivers for standard serial communication tasks.

Replacement Considerations

Compatible substitutes within the same family include the MAX232, MAX233, and MAX235. These alternatives share similar operational principles but differ in channel counts, pin configurations, and external capacitor requirements. Verify pin compatibility and electrical specifications before substitution.