MAX243CPE

Overview

The MAX243CPE is a dual-driver, dual-receiver RS-232 transceiver from the Analog Devices / Maxim Integrated MAX220–MAX249 family. It operates on a single +5V supply and utilizes internal charge-pump circuitry to generate the required ±10V for RS-232 signaling without external bipolar supplies. The device supports data rates up to 200 kbps and features an industrial operating temperature range of 0°C to +70°C. Packaged in a 16-pin PDIP format, it provides TTL/CMOS-compatible inputs and outputs alongside standard RS-232 drivers and receivers.

Feature Summary

• Integrated charge-pump circuitry eliminates the need for external voltage inverters or bipolar power supplies.
• Single +5V supply operation simplifies system design and reduces component count.
• Provides full RS-232 driver and receiver functionality with TTL/CMOS logic compatibility.

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 'CPE' against current manufacturer documentation to confirm package type and temperature grade. Confirm availability status as older revisions may be discontinued. Ensure compliance with RoHS directives if applicable to the manufacturing batch. Cross-reference the ordering information table in the official datasheet for valid part number configurations.

Selection Notes

Select this component when a dual-channel RS-232 interface is required within space-constrained designs. It is suitable for applications needing single-supply operation without external charge-pump capacitors beyond the standard C1-C4 configuration. Verify that the 200 kbps data rate meets the system requirements and that the 0°C to +70°C temperature range aligns with the environmental conditions.

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 packages to address different interface needs. The MAX243 specifically provides two drivers and two receivers, making it a compact solution for basic serial communication tasks compared to higher-channel variants like the MAX248 or MAX249.

Replacement Considerations

Direct replacements include other members of the MAX220-MAX249 family such as the MAX232 or MAX242, provided pinout and channel count compatibility are verified. Check for updated lead-free versions or alternative packages (e.g., SOIC) if surface mount is preferred. Always consult the latest datasheet for electrical parameter variations between revisions.