MAX222EPN+

Overview

The MAX222EPN+ is a dual RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces. It operates on a single +5V supply (4.5V to 5.5V) using an integrated charge pump to generate internal ±10V rails. The device features two drivers and two receivers with full-duplex communication capability. Key electrical parameters include a data rate of up to 120 kbps, receiver input hysteresis of 0.5V typical, and propagation delays of 3.5µs maximum. It includes a shutdown mode reducing supply current to 10µA typical. The component is housed in an 18-pin PDIP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external bipolar power supplies.
• Shutdown mode significantly reduces power consumption for battery-operated applications.
• Receiver inputs feature built-in hysteresis to improve noise immunity.

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'EPN+' against the manufacturer's official ordering guide to confirm the lead-free status, industrial temperature grade (-40°C to +85°C), and 18-pin PDIP packaging configuration. Ensure compatibility with the required voltage levels and interface protocols before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring dual-channel RS-232 communication powered by a single +5V source. It is suitable for applications where board space is limited due to the elimination of external charge-pump capacitors found in older designs. Verify that the 120 kbps data rate meets the system requirements and that the 18-pin DIP footprint fits the PCB layout constraints.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers manufactured by Analog Devices / Maxim Integrated. The family offers various channel counts and packages to address different interface needs while maintaining single-supply operation capabilities.

Replacement Considerations

Compatible substitutes within the same family include the MAX232EPN+ and MAX220EPN+. These parts share similar pinouts and functional characteristics but may differ in specific electrical tolerances or included features such as auto-shutdown capabilities.