MAX3086ECSD RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3086ECSD is a full-duplex RS422/RS485 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated in a 14-SOIC surface mount package. This component is classified as obsolete, indicating discontinued production. The part operates at 10 Mbps data rate with a 4.75V to 5.25V supply voltage range and 0°C to 70°C operating temperature. Due to its obsolete status, equivalent and substitute parts with active production status are necessary for new designs and ongoing system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3086ECSD
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	10 Mbps
Receiver Hysteresis	100 mV
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters that must match or be compatible with the MAX3086ECSD:

Protocol: RS422/RS485 full-duplex transceiver functionality
Number of Drivers/Receivers: 1/1 configuration
Package / Case: 14-SOIC form factor
Mounting Type: Surface Mount
Data Rate: 10 Mbps minimum capability
Supply Voltage: 4.75V ~ 5.25V operating range
Duplex Mode: Full-duplex operation

Substitute parts are grouped into two categories:

Parametric Equivalents (MAX3086/MAX3089 Series): Parts with identical electrical specifications and package, differing only in product status (Active vs. Obsolete) and RoHS compliance. These include MAX3086CSD+, MAX3086ECSD+, MAX3089CSD+, and MAX3089ECSD+.

Manufacturer Recommended Substitutes (Cross-Manufacturer): Parts from alternative manufacturers (Renesas, Analog Devices) that maintain core RS422/RS485 transceiver functionality in the same 14-SOIC package with compatible electrical parameters, though with variations in receiver hysteresis, operating temperature range, and data rate capabilities.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	RoHS Status	Inventory
MAX3086ECSD	Analog Devices/Maxim	Obsolete	RS422, RS485	10 Mbps	100 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	Non-compliant	2200
MAX3086CSD+	Analog Devices/Maxim	Active	RS422, RS485	10 Mbps	100 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	19066
MAX3086ECSD+	Analog Devices/Maxim	Active	RS422, RS485	10 Mbps	100 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	2400
MAX3089CSD+	Analog Devices/Maxim	Active	RS422, RS485	10 Mbps	100 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	1742
MAX3089ECSD+	Analog Devices/Maxim	Active	RS422, RS485	10 Mbps	100 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	129150
ISL83086EIBZ	Renesas Electronics	Active	RS422, RS485	10 Mbps	20 mV	4.5V ~ 5.5V	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant	2634
ISL83086EIBZ-T	Renesas Electronics	Active	RS422, RS485	10 Mbps	20 mV	4.5V ~ 5.5V	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant	4505
LT1791CS#PBF	Analog Devices	Active	RS422, RS485	250 kbps	20 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	1136
LT1791CS#TRPBF	Analog Devices	Active	RS422, RS485	250 kbps	20 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	1364
LTC1687CS#PBF	Analog Devices	Active	RS422, RS485	52 Mbps	25 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	2502
LTC1687CS#TRPBF	Analog Devices	Active	RS422, RS485	52 Mbps	25 mV	4.75V ~ 5.25V	0°C ~ 70°C	14-SOIC	ROHS3 Compliant	1498

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): MAX3086CSD+, MAX3086ECSD+, MAX3089CSD+, and MAX3089ECSD+ are parametric equivalents with identical electrical specifications. These parts maintain the same 100 mV receiver hysteresis, 10 Mbps data rate, and 4.75V to 5.25V supply voltage as the MAX3086ECSD. All are ROHS3 compliant with active product status, making them suitable for new designs and legacy system replacements.

Extended Temperature Range Substitute: ISL83086EIBZ and ISL83086EIBZ-T from Renesas Electronics provide the same 14-SOIC package and RS422/RS485 functionality with an extended operating temperature range of -40°C to 85°C. These parts feature a wider supply voltage range (4.5V to 5.5V) and lower receiver hysteresis (20 mV). Selection is appropriate for applications requiring broader temperature operation or enhanced noise immunity.

Higher Data Rate Alternatives: LTC1687CS#PBF and LTC1687CS#TRPBF support 52 Mbps data rates, exceeding the MAX3086ECSD specification. These parts are suitable for applications requiring higher bandwidth while maintaining RS422/RS485 protocol compatibility and the same 14-SOIC package.

Lower Data Rate Alternatives: LT1791CS#PBF and LT1791CS#TRPBF operate at 250 kbps, below the MAX3086ECSD specification. These parts are applicable only to applications with reduced bandwidth requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX3089ECSD+ directly replace MAX3086ECSD? A: Yes. Both parts share identical electrical specifications including 10 Mbps data rate, 100 mV receiver hysteresis, 4.75V to 5.25V supply voltage, and 14-SOIC package. The primary difference is product status (Active vs. Obsolete) and RoHS compliance. MAX3089ECSD+ is the recommended replacement with highest inventory availability.

Q: What is the difference between MAX3086CSD+ and MAX3086ECSD+? A: Both are parametric equivalents with identical electrical specifications. The designation suffix indicates temperature grade or internal configuration variants. Both are ROHS3 compliant and active products suitable for direct substitution.

Q: Can ISL83086EIBZ replace MAX3086ECSD in all applications? A: ISL83086EIBZ maintains RS422/RS485 functionality and 14-SOIC package compatibility. However, it features lower receiver hysteresis (20 mV vs. 100 mV), wider supply voltage range (4.5V to 5.5V), and extended operating temperature (-40°C to 85°C). Verify application requirements for noise immunity and temperature operation before substitution.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging (standard) and Tape & Reel (TR) packaging are different handling and delivery formats. Electrically, parts are identical. Selection depends on assembly process requirements and volume handling capabilities.

Q: Are LT1791 and LTC1687 suitable replacements for MAX3086ECSD? A: LT1791 and LTC1687 are RS422/RS485 transceivers in 14-SOIC packages but with different data rate specifications. LT1791 operates at 250 kbps (below MAX3086ECSD) and LTC1687 at 52 Mbps (above MAX3086ECSD). Selection is application-specific based on actual bandwidth requirements.

Q: Is RoHS compliance required for my application? A: The original MAX3086ECSD is RoHS non-compliant. All listed substitute parts are ROHS3 compliant. Verify regulatory and procurement requirements for your application before component selection.

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