MAX242CWN-T

Overview

The MAX242CWN-T is a full-duplex RS-232 transceiver designed for single +5V operation. It integrates dual charge-pump circuits to generate internal ±10V rails, eliminating the need for external bipolar supplies. The device features two drivers and two receivers with tristate outputs controlled by an active-low shutdown pin. Electrical specifications include a data rate of up to 200kbps, receiver input hysteresis of 0.5V typical, and supply current of 4mA to 10mA in normal mode. It operates within a commercial temperature range of 0°C to +70°C and utilizes an 18-pin Wide SOIC package.

Feature Summary

• Integrated charge pump circuitry enables direct operation from a single +5V power supply without requiring external voltage inverters.
• Active-low shutdown control minimizes power consumption by disabling transmitter outputs and reducing receiver supply current.
• Tristate receiver outputs allow safe connection to multidrop networks or buses when the device is disabled.

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 'T' indicates tape-and-reel packaging rather than tube. Confirm the 'C' designation aligns with the required 0°C to +70°C operating temperature range. Ensure the component source matches Analog Devices or Maxim Integrated specifications to guarantee electrical performance parameters.

Selection Notes

Select this component when board space constraints prevent the use of discrete voltage converters. It is suitable for applications requiring full-duplex communication at speeds up to 200kbps. Verify that the system can tolerate the unregulated V+ and V- output voltages generated by the internal charge pumps under load conditions.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family provides various channel configurations and package options to accommodate different interface requirements while maintaining compatibility with EIA/TIA-232E standards.

Replacement Considerations

Public confirmed substitute part numbers: MAX242CWI+, MAX242CPE+.