MAX243ESE+

Overview

The MAX243ESE+ is a single-supply RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces. It operates on a +5V supply using an integrated charge pump to generate ±10V internally. The device features two drivers and two receivers in a 16-pin Wide SOIC package. Electrical specifications include a data rate of 200 kbps, typical propagation delays of 3.5 µs (transmitter) and 1 µs (receiver), and a shutdown current of 10 µA. It supports continuous short-circuit protection and operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge-pump circuitry eliminates the need for external bipolar power supplies or additional components.
• Enables single +5V supply operation while generating internal ±10V voltages for RS-232 signaling.
• Includes a low-power shutdown mode that significantly reduces quiescent current consumption.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring compact form factors

Procurement Notes

Verify the specific suffix 'ESE+' against the manufacturer's official ordering guide to confirm the package type and RoHS compliance status. Confirm the operating temperature grade matches the design requirements, as the 'E' suffix indicates the commercial range. Ensure all required external capacitors are sourced separately, as they are not integrated into this specific part number.

Selection Notes

Select the MAX243ESE+ when a dual-driver, dual-receiver configuration is required for standard RS-232 communication. This component is suitable for designs constrained by board space due to its minimal external capacitor requirements compared to older generations. Verify that the system voltage remains stable at +5V to ensure proper charge-pump functionality and signal integrity.

Part Context

This component belongs to the Maxim Integrated MAX220–MAX249 family of multichannel RS-232 drivers and receivers. The family provides various channel counts and control options, with the MAX243 specifically offering two drivers and two receivers. These devices are engineered to replace traditional dual-supply solutions in modern single-voltage digital systems.

Replacement Considerations

Direct replacements within the same family include the MAX243CWE+ (Wide SOIC, commercial temp) and MAX243CEPE+ (TSSOP). Cross-family alternatives like the MAX3232 require different capacitor values and pin configurations. Verify pinout compatibility before substituting.