MAX242CAP

Overview

The MAX242CAP is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit 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 200kbps. The device features two drivers and two receivers with full-duplex communication capability. It utilizes an internal charge pump to generate the required ±10V levels from a single +5V supply, eliminating the need for external bipolar power sources. The component is housed in a 16-pin SSOP package and is rated for commercial operating temperatures ranging from 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external capacitors or bipolar ±12V supplies.
• Enables single-supply operation using only a +5V source for standard RS-232 signal generation.
• Includes shutdown functionality to significantly reduce power consumption during idle periods.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring low-power serial communication

Procurement Notes

Verify the specific suffix 'CAP' against the manufacturer's current ordering guide to confirm the package type and temperature grade. Ensure that the component meets the required RoHS compliance standards for your manufacturing process. Cross-reference the datasheet revision date to confirm that electrical characteristics have not been updated since previous design iterations.

Selection Notes

Select this component when designing systems that require RS-232 connectivity but are constrained to a single +5V power rail. It is suitable for applications needing two independent transmit and receive channels. Consider the thermal dissipation limits of the SSOP package if high load currents are expected. Verify that the 200kbps data rate meets the system's timing requirements.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various channel counts and package options to accommodate different board space and performance needs. The MAX242 specifically provides dual drivers and receivers with integrated charge pumps for simplified design.

Replacement Considerations

Direct substitutes within the same family include the MAX222, which shares identical pinouts and electrical specifications. Other compatible alternatives may include the MAX232 or MAX243, provided that the specific control pin configurations and enable logic align with the existing circuit design constraints.