MAX243EPE

Overview

The MAX243EPE+ is a dual-channel RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces using a single +5V supply. It integrates charge-pump circuitry to generate internal ±10V rails without external bipolar supplies. The device features two drivers and two receivers with a data rate of 200 kbps. Electrical specifications include a typical transmitter propagation delay of 3.5 µs and receiver delay of 1 µs. It operates within a temperature range of -40°C to +85°C and is housed in a 16-pin PDIP package.

Feature Summary

• Integrates dual charge-pump voltage converters to eliminate the need for external capacitors or bipolar power supplies
• Enables single-supply operation from a +5V source while generating required 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 ports
• Multidrop RS-232 network communication nodes
• Portable diagnostic equipment requiring low-power serial connectivity

Procurement Notes

Verify the specific suffix 'E' confirms the extended industrial temperature range (-40°C to +85°C) as defined in the official Analog Devices ordering information. Confirm the '+' suffix indicates lead-free compliance per RoHS standards. Cross-reference the exact part number against current manufacturer production status tables to ensure availability and correct pinout compatibility.

Selection Notes

Select this component when board space constraints prevent the use of external charge-pump capacitors. It is suitable for applications requiring independent control of driver and receiver outputs via enable pins. Ensure the system operates on a stable +5V supply and requires data rates up to 200 kbps. Verify that the 16-pin PDIP package fits the target PCB layout requirements.

Part Context

This device belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel counts and package options tailored for different interface densities. The MAX243 variant specifically provides two drivers and two receivers with integrated enable controls for flexible system management.

Replacement Considerations

Direct replacements within the same family include the MAX243CWE+ (SOIC package) or MAX243EEAI+ (SSOP package). These alternatives maintain identical electrical functionality but differ in physical footprint and mounting style. Verify thermal dissipation limits and pin-to-pin compatibility before substitution.