ADM1487EARZ-REEL7

Overview

The ADM1487EARZ-REEL7 is a half-duplex RS-485/RS-422 transceiver operating from a single 5 V supply. It supports data rates up to 2.5 Mbps and features ±15 kV ESD protection on I/O pins. The device includes thermal shutdown and short-circuit protection, with a quiescent current of 230 μA to 500 μA depending on state. It accommodates up to 128 nodes on the bus due to its 1/4 unit load receiver input impedance. Available in an 8-lead SOIC package, it operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated ±15 kV human body model ESD protection on differential I/O pins
• Thermal shutdown circuit prevents damage during excessive power dissipation or output shorting
• Slew rate limited driver outputs reduce electromagnetic interference and signal reflections
• Fail-safe receiver ensures logic high output when inputs are floating

Applications

• Energy and power metering systems
• Industrial control networks
• Telecommunications equipment
• Security systems
• Instrumentation

Procurement Notes

Verify the specific ordering suffix matches the required packaging format. Confirm RoHS compliance status through official documentation. Ensure the component source is authorized to guarantee authenticity. Check for any regional distribution restrictions that may affect availability.

Selection Notes

Select this part for applications requiring 2.5 Mbps data rates with high node density. The 1/4 unit load input impedance allows connecting up to 128 devices on a single bus. Verify that the 5 V supply voltage aligns with system requirements. Consider the SOIC-8 package constraints for PCB layout and thermal management.

Part Context

This component belongs to the ADM485E/ADM487E/ADM1487E family of ruggedized RS-485 transceivers. It shares the same pinout and general functionality as the ADM485E but offers higher node capacity. The device is designed for balanced data transmission in electrically harsh environments.

Replacement Considerations

The ADM485E is a functional substitute but supports only 32 nodes on the bus. The ADM487E supports 128 nodes but is limited to 250 kbps data rates. Verify that the replacement meets the specific speed and node count requirements of the design.