MAX3443ECPA+

Overview

The MAX3443ECPA+ is a half-duplex RS-485 transceiver in an 8-pin PDIP package. It operates from a 5V supply (4.75V to 5.25V) with a maximum data rate of 10Mbps and normal operation current of 10mA. The device features ±60V fault protection on the A/B pins, ±15kV ESD protection, and true fail-safe receiver inputs that guarantee a logic-high output when inputs are open or shorted. It includes hot-swap circuitry for telecom applications and supports up to 128 transceivers on a single bus.

Feature Summary

• Integrated ±60V fault protection on communication bus lines
• Guaranteed 10Mbps data transmission capability
• Hot-swap input structure prevents false transitions during backplane insertion
• True fail-safe receiver inputs ensure logic-high output under fault conditions

Applications

• RS-422/RS-485 communications
• Industrial networks
• Telecommunications systems
• HVAC controls

Procurement Notes

Verify the specific suffix 'CPA+' corresponds to the PDIP-8 package and industrial temperature range (-40°C to +85°C). Confirm RoHS compliance status as indicated by the '+' designation. Ensure the component source is authorized to prevent counterfeit parts, particularly given the legacy nature of the Maxim Integrated product line now part of Analog Devices.

Selection Notes

Select this component for applications requiring high-speed 10Mbps RS-485 communication with robust fault tolerance. The MAX3443E variant specifically offers non-slew-rate-limited drivers for faster data rates compared to the MAX3440E/MAX3442E series. Verify that the 1/4-unit-load receiver impedance meets the system requirement for connecting up to 128 devices on the bus.

Part Context

The MAX3443ECPA+ belongs to the MAX3440E–MAX3444E family of fault-protected transceivers. This family shares common features such as ±60V fault protection, ±15kV ESD protection, and industry-standard pinouts. The primary distinction within the family lies in the data rate capabilities and slew-rate limiting characteristics, with the MAX3443E optimized for higher speed performance.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3443EESA+ (SOIC-8 package) for surface mount applications. Other variants like the MAX3441E offer similar speeds but may lack the low-power shutdown feature found in the MAX3443E.