MAX3086CSD RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3086CSD is a full-duplex RS422/RS485 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated in a 14-SOIC surface mount package. This device is classified as obsolete product status. Due to its obsolete classification, equivalent and substitute parts with active product status are necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility through matching electrical specifications and package form factors while offering improved availability and compliance certifications.

Key Parameters

Parameter	MAX3086CSD
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	100 mV
Data Rate	10 Mbps
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
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on substitution criteria:

Parametric Equivalents (MAX3086 and MAX3089 Series): These parts maintain identical electrical specifications including 1/1 driver/receiver configuration, full-duplex operation, 10 Mbps data rate, 4.75V–5.25V supply voltage, and 14-SOIC package. Differences exist only in product status (active vs. obsolete) and RoHS compliance (ROHS3 compliant vs. non-compliant). The MAX3089 variants use an alternative base product number but maintain all functional parameters.

Manufacturer Recommended Alternatives (Renesas ISL83086, Analog Devices LT1791, LTC1687): These parts share the same protocol (RS422/RS485), duplex mode (full), driver/receiver count (1/1), package form factor (14-SOIC), and mounting type (surface mount). Electrical variations include receiver hysteresis (20–25 mV vs. 100 mV), data rate (250 kbps to 52 Mbps vs. 10 Mbps), and supply voltage ranges (4.5V–5.5V vs. 4.75V–5.25V). These alternatives are suitable when the application tolerates parameter variations within the RS422/RS485 interface standard.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Product Status	RoHS Status
MAX3086CSD	Analog Devices/Maxim	RS422, RS485	1/1	10 Mbps	4.75V–5.25V	0°C–70°C	100 mV	14-SOIC	Obsolete	Non-compliant
MAX3086CSD+	Analog Devices/Maxim	RS422, RS485	1/1	10 Mbps	4.75V–5.25V	0°C–70°C	100 mV	14-SOIC	Active	ROHS3 Compliant
MAX3086ECSD+	Analog Devices/Maxim	RS422, RS485	1/1	10 Mbps	4.75V–5.25V	0°C–70°C	100 mV	14-SOIC	Active	ROHS3 Compliant
MAX3089CSD+	Analog Devices/Maxim	RS422, RS485	1/1	10 Mbps	4.75V–5.25V	0°C–70°C	100 mV	14-SOIC	Active	ROHS3 Compliant
MAX3089ECSD+	Analog Devices/Maxim	RS422, RS485	1/1	10 Mbps	4.75V–5.25V	0°C–70°C	100 mV	14-SOIC	Active	ROHS3 Compliant
ISL83086EIBZ	Renesas Electronics	RS422, RS485	1/1	10 Mbps	4.5V–5.5V	-40°C–85°C	20 mV	14-SOIC	Active	ROHS3 Compliant
ISL83086EIBZ-T	Renesas Electronics	RS422, RS485	1/1	10 Mbps	4.5V–5.5V	-40°C–85°C	20 mV	14-SOIC	Active	ROHS3 Compliant
LT1791CS#PBF	Analog Devices	RS422, RS485	1/1	250 kbps	4.75V–5.25V	0°C–70°C	20 mV	14-SOIC	Active	ROHS3 Compliant
LT1791CS#TRPBF	Analog Devices	RS422, RS485	1/1	250 kbps	4.75V–5.25V	0°C–70°C	20 mV	14-SOIC	Active	ROHS3 Compliant
LTC1687CS#PBF	Analog Devices	RS422, RS485	1/1	52 Mbps	4.75V–5.25V	0°C–70°C	25 mV	14-SOIC	Active	ROHS3 Compliant
LTC1687CS#TRPBF	Analog Devices	RS422, RS485	1/1	52 Mbps	4.75V–5.25V	0°C–70°C	25 mV	14-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): MAX3086CSD+, MAX3086ECSD+, MAX3089CSD+, and MAX3089ECSD+ are direct functional replacements. All maintain identical electrical specifications and 14-SOIC packaging. These parts are active product status with ROHS3 compliance, addressing the obsolescence and compliance limitations of the original MAX3086CSD.

Extended Temperature Range Alternative: ISL83086EIBZ and ISL83086EIBZ-T (Renesas) provide expanded operating temperature range (-40°C to 85°C vs. 0°C to 70°C) and wider supply voltage tolerance (4.5V–5.5V vs. 4.75V–5.25V). Receiver hysteresis is reduced to 20 mV. These parts are suitable for applications requiring enhanced thermal performance and supply voltage margin.

High-Speed Alternative: LTC1687CS#PBF and LTC1687CS#TRPBF support 52 Mbps data rate compared to 10 Mbps. These are applicable when higher bandwidth is required within the same supply voltage and temperature operating range as the original part.

Low-Speed Alternative: LT1791CS#PBF and LT1791CS#TRPBF operate at 250 kbps data rate. These are suitable for low-bandwidth applications where reduced data rate is acceptable.

All substitute parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can MAX3086CSD+ be used as a direct replacement for MAX3086CSD? A: Yes. MAX3086CSD+ is a parametric equivalent with identical electrical specifications, package form factor, and functional performance. The primary differences are active product status and ROHS3 compliance.

Q: What is the difference between MAX3089CSD+ and MAX3086CSD+? A: Both parts maintain identical electrical parameters (1/1 transceiver, full-duplex, 10 Mbps, RS422/RS485). The base product number differs (MAX3089 vs. MAX3086), but functional compatibility is maintained. Consult device datasheets for any application-specific pin configuration differences.

Q: Can ISL83086EIBZ replace MAX3086CSD in all applications? A: ISL83086EIBZ maintains protocol, duplex mode, driver/receiver count, and package compatibility. However, receiver hysteresis is 20 mV (vs. 100 mV), operating temperature range is -40°C to 85°C (vs. 0°C to 70°C), and supply voltage range is 4.5V–5.5V (vs. 4.75V–5.25V). Applications must tolerate these parameter variations.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging (standard) and Tape & Reel (TR) packaging differ in form factor for automated assembly. Both contain identical components. Selection depends on manufacturing process requirements.

Q: Is LTC1687CS#PBF compatible with MAX3086CSD applications? A: LTC1687CS#PBF shares RS422/RS485 protocol, full-duplex operation, 1/1 driver/receiver configuration, and 14-SOIC package. However, data rate is 52 Mbps (vs. 10 Mbps) and receiver hysteresis is 25 mV (vs. 100 mV). Applications must confirm tolerance for higher bandwidth and reduced hysteresis.

Q: Why is MAX3086CSD marked as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Active equivalent parts (MAX3086CSD+, MAX3089CSD+, MAX3089ECSD+) are available as replacements to ensure design continuity and supply chain reliability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, addressing regulatory requirements for new designs and production.

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