MAX3085EPA RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3085EPA is a half-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-DIP through-hole package. This component is classified as obsolete, though 14,909 units remain in stock as new original inventory. The MAX3085EPA operates within a 4.75V to 5.25V supply voltage range and supports data rates up to 500 kbps with a receiver hysteresis of 100 mV across an operating temperature range of -40°C to 85°C.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for ongoing system maintenance, design updates, and long-term component availability assurance. Active alternatives with identical or compatible electrical and mechanical specifications are available from Analog Devices and related manufacturers.

Substiute Parts

MAX3085EPA

Analog Devices Inc./Maxim IntegratedIn Stock: 14996MAX3085EPA Datasheet

Current PartRFQ

MAX3085EEPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 4361MAX3085EEPA+ Datasheet

Parametric EquivalentRFQ

MAX3085EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 10444MAX3085EPA+ Datasheet

Parametric EquivalentRFQ

ADM1485ANZ

Analog Devices Inc.In Stock: 1937ADM1485ANZ Datasheet

MFR RecommendedRFQ

ADM485ANZ

Analog Devices Inc.In Stock: 4114ADM485ANZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX3085EPA is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Protocol: RS422/RS485 half-duplex operation
• Number of Drivers/Receivers: 1/1 configuration
• Duplex Mode: Half-duplex
• Package / Case: 8-DIP (0.300", 7.62mm)
• Supplier Device Package: 8-PDIP
• Mounting Type: Through Hole
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: -40°C ~ 85°C

Allowable Parameter Variations:

• Receiver Hysteresis: 70 mV to 100 mV (within RS422/RS485 specification tolerance)
• Data Rate: 500 kbps or higher (backward compatible)
• Product Status: Active preferred over obsolete
• RoHS Compliance: ROHS3 Compliant preferred for new designs
• Packaging Format: Tube acceptable for both original and substitute

Substitute parts are grouped into two categories: parametric equivalents (MAX3085EEPA+, MAX3085EPA+) that maintain identical electrical specifications, and manufacturer-recommended alternatives (ADM1485ANZ, ADM485ANZ) that meet core functional requirements with minor parameter variations within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): MAX3085EEPA+ and MAX3085EPA+ are parametric equivalents to the MAX3085EPA, maintaining 100 mV receiver hysteresis and 500 kbps data rate specifications. Both are active products with ROHS3 compliance, making them suitable for new production and long-term availability. MAX3085EPA+ offers the highest inventory level at 10,400 units.

For Functional Substitution (Enhanced Performance): ADM1485ANZ and ADM485ANZ are manufacturer-recommended alternatives from Analog Devices. Both maintain identical supply voltage, operating temperature, package, and mounting specifications. ADM1485ANZ provides enhanced data rate capability at 30 Mbps with 70 mV receiver hysteresis, while ADM485ANZ operates at 5 Mbps with the same hysteresis specification. Both are active products with ROHS3 compliance.

For Legacy System Maintenance: The MAX3085EPA remains available in original stock (14,909 units) for systems requiring exact part matching. However, transition to active alternatives is recommended for new designs and long-term supply chain stability.

Compliance Considerations: All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original MAX3085EPA is RoHS non-compliant and should be replaced in designs subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can MAX3085EEPA+ or MAX3085EPA+ be used as direct replacements for MAX3085EPA? A: Yes. Both parts maintain identical electrical specifications including 100 mV receiver hysteresis, 500 kbps data rate, 4.75V to 5.25V supply voltage, and -40°C to 85°C operating temperature. All three share the 8-DIP through-hole package. The primary difference is product status: MAX3085EEPA+ and MAX3085EPA+ are active with ROHS3 compliance, while MAX3085EPA is obsolete and RoHS non-compliant.

Q: What is the difference between ADM1485ANZ and ADM485ANZ? A: Both are Analog Devices half-duplex RS422/RS485 transceivers in 8-DIP packages with identical supply voltage and operating temperature ranges. The primary difference is data rate: ADM1485ANZ supports 30 Mbps, while ADM485ANZ supports 5 Mbps. Both feature 70 mV receiver hysteresis compared to the MAX3085EPA's 100 mV. Selection depends on system bandwidth requirements.

Q: Are all substitute parts pin-compatible with MAX3085EPA? A: All listed substitutes share the 8-DIP (0.300", 7.62mm) through-hole package and 8-PDIP supplier device package. Pin compatibility for RS422/RS485 half-duplex transceivers in this package class is standard across manufacturers. Verify pinout against your specific application schematic before implementation.

Q: Which substitute part should I select for a new design? A: For new designs, MAX3085EPA+ is recommended as the primary choice due to active product status, ROHS3 compliance, highest inventory availability (10,400 units), and identical electrical specifications to the original MAX3085EPA. This ensures regulatory compliance and long-term supply chain stability.

Q: Can I use ADM1485ANZ in applications originally designed for MAX3085EPA? A: ADM1485ANZ is functionally compatible for applications operating at or below 500 kbps data rates. The 30 Mbps capability of ADM1485ANZ exceeds MAX3085EPA requirements. The 70 mV receiver hysteresis is within RS422/RS485 specification tolerance. Verify that your application does not depend on the specific 100 mV hysteresis value before substitution.

Q: What is the moisture sensitivity level for all parts? A: All parts listed, including MAX3085EPA and all substitutes, have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.