MAX243MJE/883B

Overview

The MAX243MJE/883B is a dual RS-232 driver and receiver integrated circuit designed for EIA/TIA-232E and V.28/V.24 communication interfaces. It operates from a single +5V supply using an internal charge pump to generate ±10V, eliminating the need for external bipolar supplies. The device features two drivers and two receivers with TTL/CMOS-compatible inputs and outputs. Key electrical parameters include a data rate of up to 120 kbps, an input voltage operating range of ±30V, and a typical output voltage swing of ±7.5V under load. It supports continuous short-circuit protection on transmitter outputs.

Feature Summary

• Integrated charge pump circuitry enables single-supply operation without external bipolar power sources
• Provides full RS-232 signal level translation between TTL/CMOS logic and serial port standards
• Includes dedicated enable control pins for independent management of transmitter and receiver states

Applications

• Interface translation in multidrop RS-232 networks
• Portable diagnostic equipment requiring low-power serial communication
• Embedded systems needing reliable serial data transmission over standard cables

Procurement Notes

Verify the specific military qualification suffix /883B against current manufacturer documentation to confirm compliance with MIL-PRF-38534 or equivalent standards. Ensure that the ceramic package variant matches the thermal and mechanical requirements of the target application environment before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require robust RS-232 communication with minimal external passive components. The integrated charge pump simplifies board layout compared to older solutions requiring external capacitors for voltage inversion. Verify that the required data rates do not exceed the specified limits for the chosen operating temperature range.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel configurations and control options to suit different interface complexity levels. The MAX243 specifically provides a balanced two-driver, two-receiver configuration suitable for standard half-duplex serial communications.

Replacement Considerations

Public confirmed substitute part numbers: MAX243CPE, MAX243CSE.