MAX225EWI+G36

Overview

The MAX225EWI+G36 is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.75V to 5.25V and supports data rates up to 120 kbps. The device features an internal charge pump that generates ±10V from a single +5V source, eliminating the need for external bipolar supplies or discrete capacitors. It provides four drivers and five receivers in a 28-pin Wide SOIC package (EWI). The component is rated for operation across an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external capacitors and dual power supplies.
• Enables single-supply operation using only a +5V input while generating necessary RS-232 voltage levels internally.
• Includes dedicated enable control inputs for managing transmitter and receiver states independently.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial communication standards
• Multidrop RS-232 network implementations requiring multiple channels
• Portable diagnostic equipment where board space and single-supply constraints are critical

Procurement Notes

Verify the specific suffix G36 against current manufacturer documentation to confirm lead-free status and RoHS compliance. Confirm availability as this part number may be subject to discontinuation notices. Ensure the ordering information matches the required temperature grade and package variant for your design specifications.

Selection Notes

Select this component when designing systems with strict PCB area limitations that prohibit external charge-pump capacitors. It is suitable for applications requiring four transmit and five receive channels powered exclusively by a +5V rail. Verify that the 120 kbps maximum data rate meets the system's communication speed requirements.

Part Context

This device belongs to the MAX220–MAX249 family of line drivers/receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The MAX225 specifically integrates the charge pump and capacitors on-chip, distinguishing it from variants like the MAX220 which require external components. It shares architectural similarities with the MAX233 and MAX235 but offers distinct channel counts.

Replacement Considerations

Public confirmed substitute part numbers: MAX225CWI+, MAX225EWI+