MAX3079EAPD+

Overview

The MAX3079EAPD+ is a +3.3V, ±15kV ESD-protected, fail-safe, hot-swap RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver in a 14-pin Plastic DIP package (PDIP-14). The device operates within an extended temperature range of -40°C to +125°C. Supply voltage is fixed at 3.3V with a typical supply current of 0.8mA when unloaded. The component supports selectable data rates of 250kbps, 500kbps, and 16Mbps via the SRL pin. It includes a shutdown mode with a maximum current draw of 10µA.

Feature Summary

• Pin-selectable full-duplex or half-duplex operation for flexible bus configuration
• Independent phase control pins to correct twisted-pair reversal errors
• Hot-swap capability on DE and RE inputs to prevent false transitions during insertion
• Fail-safe receiver guarantees logic-high output when inputs are open or shorted

Applications

• Industrial Control Systems
• Telecommunications Equipment
• Security Systems
• Lighting Systems
• Instrumentation

Procurement Notes

Verify the specific suffix 'APD' corresponds to the PDIP-14 package and the -40°C to +125°C industrial temperature grade. Confirm that the ordering information matches the exact datasheet revision required for your design specifications. Ensure compatibility with standard 14-pin DIP footprints during PCB layout.

Selection Notes

Select this component when variable transmission speeds are required without changing hardware. The MAX3079E uniquely allows dynamic selection between 250kbps, 500kbps, and 16Mbps via the SRL pin. It is suitable for designs needing both half-duplex and full-duplex modes through the H/F pin. Verify thermal dissipation requirements for the plastic DIP package under maximum load conditions.

Part Context

This part belongs to the MAX3070E–MAX3079E family of high-speed RS-485 transceivers. While other members of the series have fixed slew rates and duplex modes, the MAX3079E provides programmable performance characteristics. It shares common interface standards and protection features with the broader family but offers distinct configurability for complex communication networks.

Replacement Considerations

Direct functional replacements within the same family include MAX3079EESE+, MAX3079EESD+, MAX3079EASE+, and MAX3079EEPD+. These variants share identical electrical characteristics and pinouts but differ in packaging type (SOIC vs. PDIP) or reel/tube shipping options.