MAX237ENG+

Overview

The MAX237ENG+ is a multichannel RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates five drivers and three receivers within a single package, supporting full-duplex communication at data rates up to 120 kb/s. The device operates on a single +5 V power supply, consuming approximately 15 mA of operating current. It is housed in a 24-pin Narrow PDIP package designed for through-hole mounting. The component functions reliably across an extended industrial temperature range from -40°C to +85°C. Propagation delay is specified at 10 µs, and the unit does not include ESD protection or shutdown capabilities.

Feature Summary

• Integrates five independent drivers and three receivers for complex serial communication topologies
• Enables single-supply operation via internal charge pump circuitry eliminating bipolar voltage requirements
• Supports full-duplex data transmission with standard RS-232 signal levels

Applications

• Multichannel RS-232 interface systems requiring multiple simultaneous connections
• Industrial control networks utilizing multidrop configurations
• Portable diagnostic equipment where board space efficiency is critical

Procurement Notes

Verify the specific suffix ENG+ against the official Analog Devices datasheet to confirm the narrow DIP package and industrial temperature grade. Ensure compatibility with existing PCB footprints for 24-pin through-hole mounting. Confirm that the absence of ESD protection meets the system's environmental safety requirements before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring five transmit and three receive channels without external level shifting. Compare against the ADM237LANZ for potential pin-compatible alternatives. Verify that the 120 kb/s speed limit satisfies the application's baud rate needs. Ensure the design accommodates the necessary external capacitors for the internal charge pump as specified in the electrical characteristics.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered, multichannel RS-232 drivers and receivers. The series is designed for EIA/TIA-232E and V.28/V.24 communications interfaces. It serves as a bridge between TTL/CMOS logic levels and RS-232 voltages, facilitating reliable data exchange in environments lacking ±12V supplies.

Replacement Considerations

The ADM237LANZ is listed as a similar alternative by distributors. Verify functional equivalence regarding driver/receiver counts and electrical specifications before substitution.