MAX242EWN+T

Overview

The MAX242EWN+T is a +5V-powered, multichannel RS-232 line driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 116 kbps. The device features an integrated charge pump that generates internal ±10V rails from a single +5V source, eliminating the need for external bipolar supplies. Electrical specifications include a maximum transmitter output voltage swing of ±8V and a receiver input operating range of ±30V. Transition slew rates reach up to 30 V/µs, while propagation delays are typically 3.5 µs for transmitters and 1 µs for receivers. The component is housed in a 16-pin Wide SO package and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external bipolar power supplies
• Enables single-supply operation using only a +5V source
• Provides shutdown mode functionality to significantly reduce power consumption

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 communication networks
• Portable diagnostic equipment requiring low-power serial interfaces

Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature rating of -40°C to +85°C against the manufacturer's official ordering guide. Confirm the '+T' designation indicates tape-and-reel packaging rather than tube distribution. Cross-reference the exact part number with current distributor catalogs to ensure availability status matches project requirements.

Selection Notes

Select this component when designing systems limited to a single +5V supply rail where space constraints prohibit external charge pumps. Ensure the application requires standard RS-232 signaling levels and does not exceed the specified 116 kbps data rate limit. Verify that the 16-pin Wide SO footprint aligns with the target PCB layout and thermal dissipation capabilities.

Part Context

This device belongs to the MAX220–MAX249 family of +5V-powered RS-232 drivers and receivers. The family offers various channel configurations and control options tailored for different interface needs. The MAX242 specifically provides two drivers and two receivers with dedicated enable controls for flexible system management.

Replacement Considerations

Direct replacements within the same family include the MAX222, which shares identical electrical characteristics and pinout compatibility. Other variants such as the MAX232 or MAX243 may serve as functional substitutes if channel counts or control logic differences are acceptable.