MAX222CPN+

Overview

The MAX222CPN+ is a fully integrated RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and includes an internal charge pump to generate the required ±10V for RS-232 signaling, eliminating the need for external bipolar supplies. The device features two drivers and two receivers (2/2 configuration) with full-duplex communication capabilities. It supports data rates up to 120kbps and provides a receiver input hysteresis of 500mV. Designed for surface-mount applications, it is housed in an 18-pin PDIP package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external capacitors or bipolar power supplies.
• Enables single-supply operation from a standard +5V source while generating necessary RS-232 voltage levels.
• Includes a low-power shutdown mode that significantly reduces current consumption when the device is inactive.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network communications
• Portable diagnostic equipment requiring compact interface solutions

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (0°C to +70°C) and 'PN' denotes the 18-pin plastic DIP package. Confirm RoHS compliance status (+ suffix) matches project requirements. Ensure the ordering information table in the official datasheet is consulted to validate the exact pinout and electrical specifications against the intended PCB layout.

Selection Notes

Select this component when board space constraints prevent the use of external charge-pump capacitors. It is suitable for systems powered exclusively by a +5V rail. Compare propagation delay and slew rate specifications against other family members if high-speed data integrity is critical. Verify that the 120kbps maximum data rate meets the application's throughput requirements.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel counts and package options. The MAX222 specifically provides a dual-driver, dual-receiver configuration. It shares core architecture with devices like the MAX232 but differs in package type and specific control pin configurations.

Replacement Considerations

Direct replacements within the same family include the MAX232CPN+, which shares identical electrical characteristics and functionality but utilizes a different package designation. Verify pin compatibility before substitution.