MAX230EWP+

Overview

The MAX230EWP+ is a +5V-powered, multichannel RS-232 driver from the MAX220–MAX249 family. It provides five drivers and zero receivers for EIA/TIA-232E and V.28/V.24 interfaces. The device operates on a single +5V supply with a voltage range of 4.5V to 5.5V. It supports data rates up to 120kbps and features a shutdown mode consuming less than 10µA. The component is housed in a 20-pin Wide SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual charge-pump circuitry to generate internal ±10V levels from a single +5V source, eliminating the need for external bipolar supplies.
• Includes a low-power shutdown mode that reduces supply current significantly while maintaining high-impedance transmitter outputs.
• Provides five independent RS-232 drivers compatible with standard TTL/CMOS logic input levels.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostics equipment requiring single-supply operation

Procurement Notes

Verify the specific suffix 'EWP+' against the manufacturer's official ordering guide to confirm the package type and temperature grade. Ensure the design accommodates four external capacitors required for the internal charge pump circuit. Confirm availability status as discontinued or active through authorized distributors before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring multiple RS-232 transmit channels without receiving capabilities. It is suitable for applications where space constraints prevent using discrete voltage inverters. Verify that the system can tolerate the propagation delay characteristics inherent to charge-pump-based transceivers compared to dedicated dual-supply parts.

Part Context

This part belongs to the Maxim Integrated MAX220–MAX249 series of line drivers and receivers. These components are designed specifically for environments lacking ±12V power rails. The MAX230 variant focuses exclusively on transmission, offering five drivers to support complex multidrop configurations in battery-operated or portable devices.

Replacement Considerations

The MAX232EWP+ serves as a functional substitute but includes two receivers in addition to its drivers. Designers must account for the additional receiver pins and ensure unused inputs are properly terminated to maintain signal integrity.