MAX220CWE+T

Overview

The MAX220CWE+T is a +5V-powered, multichannel RS-232 line driver and receiver designed for EIA/TIA-232E and V.28/V.24 communication interfaces. It operates on a single +5V supply by utilizing an integrated charge pump to generate the required ±10V internal voltages, eliminating the need for external bipolar supplies. The device features two drivers and two receivers in a 16-pin Wide SOIC package. Electrical specifications include a typical data rate of 120 kbps, a supply voltage range of 4.5V to 5.5V, and an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external bipolar power supplies.
• Enables single-supply operation from a standard +5V source.
• Provides full-duplex communication with two drivers and two receivers.

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 'CWE+T' against the manufacturer's current ordering information to confirm package type (Wide SOIC), temperature grade (Commercial), and tape-and-reel packaging status. Confirm RoHS compliance and lead-free status as indicated by the '+' designation. Cross-reference the part number with official distributor catalogs to ensure availability and correct revision level.

Selection Notes

Select this component when board space is limited and external capacitors are acceptable, unlike the MAX225 or MAX233 which require no external components. Ensure the application requires only two channels; higher channel counts necessitate models from the MAX240 series. Verify that the system operates within the commercial temperature range and utilizes a single +5V supply.

Part Context

This component belongs to the MAX220–MAX249 family of +5V-powered RS-232 transceivers manufactured by Analog Devices / Maxim Integrated. The family offers various configurations ranging from dual-channel to octal-channel devices, accommodating different interface requirements while maintaining compatibility with standard RS-232 signaling levels.

Replacement Considerations

Public confirmed substitute part numbers: MAX220CWE+ (tube packaging variant).

FAQ

What external capacitor values are required for the MAX220CWE+T?

The datasheet specifies C1 = 0.047µF and C2 through C5 = 0.33µF for the MAX220.

Does the MAX220CWE+T support shutdown mode?

No, the MAX220 does not feature a shutdown pin or low-power shutdown mode; this feature is available in variants such as the MAX222.

What is the maximum input voltage rating for the receiver inputs?

The RIN pins on the MAX220 have a maximum input voltage rating of ±25V, whereas other devices in the family typically support ±30V.