ADM3485EARZ Equivalent & Substitute Parts

Part Overview

The ADM3485EARZ is an active RS422/RS485 half-duplex transceiver interface integrated circuit in an 8-SOIC surface mount package. This device functions as a single driver/receiver pair for serial communication protocols requiring differential signaling over extended distances. The part is currently in active production status with 3,917 units in stock.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or packaging format preferences while maintaining full electrical and mechanical compatibility.

Substiute Parts

ADM3485EARZ

UMWIn Stock: 4020ADM3485EARZ Datasheet

Current PartRFQ

MAX3485ESA

UMWIn Stock: 25144MAX3485ESA Datasheet

Parametric EquivalentRFQ

SP3485EEN

UMWIn Stock: 15489SP3485EEN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADM3485EARZ is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• RS422/RS485 protocol support
• 1 driver and 1 receiver configuration
• Half-duplex operation mode
• 12 Mbps maximum data rate
• 2.97V to 3.63V supply voltage range
• 30 mV receiver hysteresis
• -40°C to 85°C operating temperature range

Mechanical Compatibility Requirements:

• 8-SOIC package format (0.154", 3.90mm width)
• Surface mount mounting type

Compliance Requirements:

• ROHS3 compliance status
• MSL 1 rating
• Active product status

All identified substitute parts meet these parameters without exception. Packaging format variations (Cut Tape vs. Tape & Reel) do not affect electrical or mechanical compatibility and represent logistics-level differences only.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ADM3485EARZ, MAX3485ESA, and SP3485EEN—are electrically and mechanically equivalent for RS422/RS485 half-duplex transceiver applications. Selection between these parts is based on the following factors:

Inventory Availability: MAX3485ESA offers the highest stock level at 25,100 units, followed by SP3485EEN at 15,442 units. ADM3485EARZ maintains 3,917 units in inventory.

Packaging Format: ADM3485EARZ and MAX3485ESA are available in Cut Tape (CT) and Digi-Reel® formats, suitable for both manual and automated assembly processes. SP3485EEN is supplied in Tape & Reel (TR) format, optimized for high-volume automated pick-and-place operations.

Compliance Status: All three parts maintain ROHS3 compliance, MSL 1 rating, and active product status. All are classified under ECCN EAR99 and HTSUS code 8542.39.0001, ensuring consistent regulatory treatment across substitution scenarios.

Supply Chain Considerations: Parts are interchangeable at the circuit board level without design modification, PCB layout adjustment, or firmware changes. Pin-to-pin compatibility is absolute across all three devices.

Frequently Asked Questions (FAQ)

Q: Can MAX3485ESA be used as a direct replacement for ADM3485EARZ in existing designs?

A: Yes. MAX3485ESA is electrically and mechanically equivalent to ADM3485EARZ. Both devices support RS422/RS485 protocols, operate at identical voltage ranges (2.97V to 3.63V), maintain the same data rate (12 Mbps), and are packaged in 8-SOIC format. No circuit modifications are required.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) and Digi-Reel® formats are used for lower-volume or mixed-component assembly processes and allow manual component handling. Tape & Reel (TR) format is optimized for high-volume automated assembly lines using pick-and-place equipment. The electrical and mechanical specifications of the integrated circuit remain identical regardless of packaging format.

Q: Are all three parts suitable for -40°C to 85°C operating environments?

A: Yes. ADM3485EARZ, MAX3485ESA, and SP3485EEN all operate across the full -40°C to 85°C temperature range. This specification is identical across all three devices.

Q: Do these parts require different PCB layouts or trace routing?

A: No. All three parts use the 8-SOIC package with identical pin assignments and mechanical dimensions (0.154", 3.90mm width). PCB layouts designed for one part are directly compatible with the others without modification.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates the lowest moisture sensitivity level. These parts have unlimited shelf life under standard storage conditions and do not require special moisture-control packaging or baking procedures prior to assembly.

Q: Are there any compliance or regulatory differences between these parts?

A: No. All three parts are ROHS3 compliant, classified under ECCN EAR99, and assigned HTSUS code 8542.39.0001. They are treated identically for export control and environmental compliance purposes.

Q: Can SP3485EEN be used in applications requiring Cut Tape packaging?

A: SP3485EEN is supplied in Tape & Reel format only. If Cut Tape packaging is a requirement, ADM3485EARZ or MAX3485ESA must be selected. However, the integrated circuit itself is electrically identical.

Q: What receiver hysteresis value applies to all three parts?

A: All three parts maintain 30 mV receiver hysteresis, ensuring consistent noise immunity and signal detection characteristics across RS422/RS485 bus implementations.