MAX3073EEPD

Overview

The MAX3073EEPD is a +3.3V, full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver within a 14-pin PDIP package. The device supports data rates up to 500 kb/s and operates with a fixed supply voltage of 3.3 V. It features ±15 kV ESD protection on the bus pins and includes fail-safe circuitry to ensure a logic-high receiver output when inputs are open or shorted. The component is designed for hot-swap applications and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Integrated fail-safe circuitry guarantees a logic-high receiver output when differential inputs are open or shorted.
• Supports hot-swap operations without causing power supply glitches or bus contention during insertion.
• Provides robust ±15 kV human body model ESD protection on the RS-422/RS-485 bus lines.

Applications

• Industrial automation networks requiring reliable half-duplex or full-duplex communication.
• Building automation systems utilizing RS-485 multi-drop topologies.
• Process control instrumentation connected via serial communication buses.

Procurement Notes

Verify the specific suffix 'EEPD' corresponds to the 14-pin PDIP package variant rather than SOIC or TSSOP options. Confirm that the manufacturer designation matches Analog Devices or Maxim Integrated, as legacy branding may vary. Ensure the component meets the required RoHS compliance standards for the intended manufacturing process. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when a full-duplex interface is required alongside high ESD tolerance and hot-swap capability. The fixed 3.3 V supply requirement limits usage in 5 V systems unless level shifting is implemented. The 500 kb/s data rate is suitable for low-to-medium speed industrial protocols. Consider the PDIP package constraints if surface-mount assembly is preferred for the final product.

Part Context

This part belongs to the MAX3070E–MAX3079E family of +3.3V RS-422/RS-485 transceivers. These devices share common electrical characteristics, including fail-safe outputs and ±15 kV ESD protection. The primary distinction lies in the package type and thermal performance. This family is widely used in industrial environments where bus reliability under harsh electrical conditions is critical.

Replacement Considerations

The ADM3073EARZ serves as a functional equivalent from Analog Devices, offering similar RS-422/RS-485 capabilities with 15 kV ESD protection. Verify package compatibility, as the ADM3073EARZ typically utilizes an SOIC-14 footprint compared to the PDIP option here. Check for identical pinouts and electrical specifications before substitution.