MAX242EWN

Overview

The MAX242EWN is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within an extended temperature range of -40°C to +85°C and utilizes a 16-pin Wide SOIC package. The device features two drivers and two receivers with a data rate capability of up to 200 kbps. It includes an integrated charge pump that eliminates the need for external bipolar ±12V supplies, enabling single-supply operation from a +5V source. Electrical specifications include a typical supply current of 10 mA under no-load conditions and a shutdown mode current as low as 10 µA at +25°C.

Feature Summary

• Integrated charge pump circuitry enables single +5V supply operation without requiring external bipolar voltage sources
• Shutdown mode significantly reduces power consumption for battery-operated applications
• Provides EIA/TIA-232E interface translation between TTL/CMOS logic levels and RS-232 signal standards

Applications

• Interface translation between microprocessor systems and RS-232 peripherals
• Multidrop RS-232 communication networks
• Portable diagnostic equipment requiring low power consumption

Procurement Notes

Verify the specific ordering suffix 'E' confirms the -40°C to +85°C industrial temperature rating and 'W' indicates the 16-pin Wide SOIC package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure component authenticity via traceable supply chains.

Selection Notes

Select this component when designing systems requiring dual-channel RS-232 communication powered exclusively by a +5V rail. The MAX242EWN is suitable for space-constrained designs due to its integrated charge pump, removing the need for bulky external capacitors typically required in older generation transceivers. Verify that the 200 kbps data rate meets system timing requirements.

Part Context

The MAX242EWN belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. This family allows designers to implement serial communications without access to traditional ±12V power rails, simplifying board layout and reducing overall system cost and complexity.

Replacement Considerations

The MAX222 serves as a functional equivalent within the same family. Both devices offer identical electrical characteristics, pin configurations, and channel counts. Selection between these part numbers should be based on package availability and specific temperature grade requirements.