MAX3085CSA-T Equivalent & Substitute Parts

Part Overview

The MAX3085CSA-T is a half-duplex RS422/RS485 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The MAX3085CSA-T supports 1/1 driver/receiver configuration with 500kbps data rate capability and operates within 4.75V to 5.25V supply voltage range across 0°C to 70°C temperature range.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3085CSA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Category	Interface - Transceiver
Protocol Support	RS422, RS485
Duplex Configuration	Half
Driver/Receiver Count	1/1
Data Rate	500kbps
Supply Voltage	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	100 mV
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MAX3085CSA-T is determined by the following critical parameters:

Package Compatibility: All substitute parts must use 8-SOIC surface mount package (0.154", 3.90mm Width)
Protocol Support: RS422/RS485 half-duplex transceiver functionality required
Driver/Receiver Configuration: 1/1 configuration mandatory
Supply Voltage Range: Must operate within or encompass 4.75V ~ 5.25V
Operating Temperature: Must support at least 0°C ~ 70°C range
Mounting Type: Surface mount only

Substitute parts are grouped into two categories:

Parametric Equivalents (MAX3085CSA+T, MAX3085ECSA+T): Identical electrical specifications and package, differing only in packaging format (Tape & Reel) and product status (Active). These are direct replacements with enhanced RoHS3 compliance.

Manufacturer Recommended Alternatives (ADM series, ISL series): Parts meeting core functional requirements with variations in data rate, receiver hysteresis, temperature range, and supply voltage specifications. These parts maintain 8-SOIC package compatibility and RS422/RS485 protocol support.

Parameter Comparison

Part Number	Manufacturer	Protocol	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Product Status	RoHS Status	Packaging
MAX3085CSA-T	Analog Devices/Maxim	RS422, RS485	500kbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	Obsolete	Non-compliant	Tube
MAX3085CSA+T	Analog Devices/Maxim	RS422, RS485	500kbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	Active	ROHS3 Compliant	Tape & Reel
MAX3085ECSA+T	Analog Devices/Maxim	RS422, RS485	500kbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	Active	ROHS3 Compliant	Tape & Reel
ADM1485JRZ	Analog Devices	RS422, RS485	30Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Tube
ADM1485JRZ-REEL	Analog Devices	RS422, RS485	5Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Cut Tape & Digi-Reel
ADM483JRZ	Analog Devices	RS422, RS485	250kbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Tube
ADM485JRZ	Analog Devices	RS422, RS485	5Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Tube
ADM485JRZ-REEL	Analog Devices	RS422, RS485	5Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Cut Tape & Digi-Reel
ADM485JRZ-REEL7	Analog Devices	RS422, RS485	5Mbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	Active	ROHS3 Compliant	Cut Tape & Digi-Reel
ISL83085EIBZ	Renesas Electronics	RS422, RS485	500kbps	4.5V ~ 5.5V	-40°C ~ 85°C	20 mV	Active	ROHS3 Compliant	Tube
ISL83085EIBZ-T	Renesas Electronics	RS422, RS485	500kbps	4.5V ~ 5.5V	-40°C ~ 85°C	20 mV	Active	ROHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

Direct Replacement (Preferred)

MAX3085CSA+T and MAX3085ECSA+T are parametric equivalents with identical electrical specifications to the MAX3085CSA-T. Both parts are in Active product status with ROHS3 compliance, addressing the obsolescence and RoHS non-compliance issues of the original part. Selection between these two depends on packaging requirements: MAX3085CSA+T in Tape & Reel format or MAX3085ECSA+T also in Tape & Reel format.

Analog Devices ADM Series Alternatives

ADM1485JRZ, ADM1485JRZ-REEL, ADM483JRZ, ADM485JRZ, ADM485JRZ-REEL, and ADM485JRZ-REEL7 are manufacturer-recommended alternatives from Analog Devices. All maintain 8-SOIC package compatibility, RS422/RS485 protocol support, and 4.75V ~ 5.25V supply voltage range. These parts are Active status with ROHS3 compliance. Data rate variations (250kbps to 30Mbps) and receiver hysteresis differences (70 mV versus 100 mV) must be evaluated against application requirements.

Renesas ISL83085 Series Alternative

ISL83085EIBZ and ISL83085EIBZ-T offer extended operating temperature range (-40°C ~ 85°C) and wider supply voltage tolerance (4.5V ~ 5.5V) compared to the MAX3085CSA-T. Both are Active status with ROHS3 compliance. The 20 mV receiver hysteresis provides tighter noise margin specifications. Selection between Tube (ISL83085EIBZ) and Tape & Reel (ISL83085EIBZ-T) packaging depends on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX3085CSA+T directly replace MAX3085CSA-T without circuit modifications?

A: Yes. MAX3085CSA+T is a parametric equivalent with identical electrical specifications, package type, and pin configuration. The only differences are packaging format (Tape & Reel versus Tube) and product status (Active versus Obsolete). No circuit modifications are required.

Q: What are the key differences between ADM series parts and the original MAX3085CSA-T?

A: ADM series parts maintain core RS422/RS485 half-duplex functionality and 8-SOIC package compatibility. Primary differences include higher data rates (5Mbps to 30Mbps versus 500kbps), lower receiver hysteresis (70 mV versus 100 mV), and Active product status with ROHS3 compliance. Supply voltage range and operating temperature remain compatible with the original specification.

Q: Is the ISL83085EIBZ suitable for applications requiring extended temperature operation?

A: ISL83085EIBZ supports -40°C ~ 85°C operating temperature range, exceeding the MAX3085CSA-T specification of 0°C ~ 70°C. This part is suitable for applications requiring extended temperature operation. Supply voltage range is also wider (4.5V ~ 5.5V). Verify receiver hysteresis (20 mV) compatibility with application noise margins.

Q: What packaging options are available for equivalent parts?

A: Parametric equivalents (MAX3085CSA+T, MAX3085ECSA+T) are available in Tape & Reel format. ADM series parts are available in Tube, Cut Tape & Digi-Reel, or both formats depending on specific part number. ISL83085 series is available in both Tube (ISL83085EIBZ) and Tape & Reel (ISL83085EIBZ-T) formats. Selection depends on procurement volume and assembly line requirements.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original MAX3085CSA-T is RoHS non-compliant. Substitution with any listed equivalent or alternative part addresses RoHS compliance requirements for new designs and production.

Q: Can ADM483JRZ be used in applications designed for 500kbps data rate?

A: ADM483JRZ supports 250kbps maximum data rate, which is below the 500kbps specification of MAX3085CSA-T. This part is not suitable for applications requiring 500kbps operation. Use MAX3085CSA+T, MAX3085ECSA+T, or ISL83085EIBZ series for 500kbps compatibility.

Q: What is the difference between ADM485JRZ-REEL and ADM485JRZ-REEL7?

A: Both parts are electrically identical with 5Mbps data rate, 70 mV receiver hysteresis, and identical electrical specifications. The difference is in packaging designation and reel configuration. Consult supplier documentation for specific reel specifications and compatibility with assembly equipment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message