MAX487EESA-T RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The MAX487EESA-T is a half-duplex RS422/RS485 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated in an 8-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates at 250 kbps data rate with a 4.75V to 5.25V supply voltage range and supports industrial temperature operation from -40°C to 85°C.

Key Parameters

Parameter	Specification
Part Number	MAX487EESA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete
Type	Transceiver
Protocol	RS422, RS485
Configuration	Half-Duplex, 1 Driver / 1 Receiver
Data Rate	250 kbps
Receiver Hysteresis	70 mV
Supply Voltage	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS Non-Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX487EESA-T is determined by the following critical parameters:

Core Compatibility Criteria:

Protocol support: RS422 and RS485
Configuration: Half-duplex operation with 1 driver and 1 receiver
Package: 8-SOIC form factor
Supply voltage range: 4.75V to 5.25V
Receiver hysteresis: 70 mV
Mounting type: Surface mount

Substitution Categories:

Direct Packaging Equivalent: MAX487EESA+ differs only in packaging format (Tube vs. standard) and product status (Active vs. Obsolete), maintaining identical electrical specifications and RoHS3 compliance.

Parametric Equivalents: MAX483EESA+T, MAX483ESA+T, MAX487EESA+T, and MAX487ESA+T meet all core electrical and mechanical parameters. These parts are active products with ROHS3 compliance and differ primarily in base product designation (MAX483 vs. MAX487) and packaging options (Cut Tape & Digi-Reel).

Manufacturer-Recommended Alternatives: ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, ADM1485JRZ, and ADM1485JRZ-REEL are Analog Devices recommended substitutes. These parts maintain protocol support, package compatibility, and supply voltage specifications. The ADM1485 series operates at 30 Mbps (higher than the 250 kbps MAX487), providing enhanced performance capability. Temperature rating variations exist: ADM1485ARZ variants support -40°C to 85°C; ADM1485JRZ variants support 0°C to 70°C.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Configuration	Data Rate	Supply Voltage	Operating Temperature	Package	RoHS Status	Packaging Format
MAX487EESA-T	Analog Devices/Maxim	Obsolete	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Non-Compliant	Standard
MAX487EESA+	Analog Devices/Maxim	Active	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Tube
MAX483EESA+T	Analog Devices/Maxim	Active	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
MAX483ESA+T	Analog Devices/Maxim	Active	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
MAX487EESA+T	Analog Devices/Maxim	Active	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
MAX487ESA+T	Analog Devices/Maxim	Active	RS422, RS485	Half-Duplex 1/1	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADM1485ARZ	Analog Devices	Active	RS422, RS485	Half-Duplex 1/1	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Tube
ADM1485ARZ-REEL	Analog Devices	Active	RS422, RS485	Half-Duplex 1/1	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADM1485ARZ-REEL7	Analog Devices	Active	RS422, RS485	Half-Duplex 1/1	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADM1485JRZ	Analog Devices	Active	RS422, RS485	Half-Duplex 1/1	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	ROHS3 Compliant	Tube
ADM1485JRZ-REEL	Analog Devices	Active	RS422, RS485	Half-Duplex 1/1	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select MAX487EESA+ for immediate obsolescence mitigation. This part maintains 100% electrical and mechanical compatibility with identical 250 kbps data rate and -40°C to 85°C temperature range. The transition from RoHS non-compliant to ROHS3 compliant status aligns with current regulatory requirements.

For Active Product Continuity: MAX483EESA+T, MAX483ESA+T, MAX487EESA+T, or MAX487ESA+T provide long-term supply assurance through active product status. All maintain identical electrical specifications and ROHS3 compliance. Selection among these variants depends on packaging requirements: Cut Tape & Digi-Reel formats support automated assembly workflows, while inventory levels vary (4,900 to 55,100 units).

For Enhanced Performance Applications: ADM1485ARZ series (including REEL and REEL7 variants) offer 30 Mbps data rate capability, exceeding the 250 kbps specification of the MAX487EESA-T. These parts maintain identical supply voltage, package form factor, and ROHS3 compliance. Temperature rating selection is critical: ADM1485ARZ variants support -40°C to 85°C industrial range; ADM1485JRZ variants support 0°C to 70°C commercial range. Packaging format options (Tube vs. Cut Tape & Digi-Reel) accommodate different procurement and assembly requirements.

Compliance Considerations: All recommended substitutes carry ROHS3 compliance and EAR99 or 5A991G ECCN classification, maintaining regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX483EESA+T replace MAX487EESA-T directly? A: Yes. Both parts share identical electrical specifications: RS422/RS485 protocol, half-duplex 1/1 configuration, 250 kbps data rate, 4.75V to 5.25V supply voltage, 70 mV receiver hysteresis, -40°C to 85°C operating temperature, and 8-SOIC package. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. Non-Compliant).

Q: What is the difference between MAX487EESA+ and MAX487EESA+T? A: These parts are electrically identical. The primary distinction is packaging format: MAX487EESA+ uses Tube packaging, while MAX487EESA+T uses Cut Tape & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Can ADM1485ARZ be used as a substitute for MAX487EESA-T? A: Yes, with performance enhancement consideration. ADM1485ARZ maintains protocol support (RS422/RS485), half-duplex configuration, supply voltage range (4.75V to 5.25V), 8-SOIC package, and -40°C to 85°C temperature range. The ADM1485ARZ operates at 30 Mbps versus the MAX487EESA-T's 250 kbps, providing higher bandwidth capability. ROHS3 compliance and EAR99 classification align with current standards.

Q: What is the temperature difference between ADM1485ARZ and ADM1485JRZ? A: ADM1485ARZ supports industrial temperature range (-40°C to 85°C), matching the MAX487EESA-T specification. ADM1485JRZ supports commercial temperature range (0°C to 70°C). Selection depends on application environment requirements. For applications requiring full industrial temperature support, ADM1485ARZ variants are appropriate.

Q: Are all substitute parts available in Cut Tape & Digi-Reel format? A: Most substitutes offer Cut Tape & Digi-Reel packaging. MAX487EESA+ is available in Tube format only. ADM1485ARZ and ADM1485JRZ are available in both Tube and Cut Tape & Digi-Reel formats (designated with -REEL or -REEL7 suffixes). Verify packaging availability with your supplier based on assembly requirements.

Q: What is the inventory status of these substitute parts? A: All recommended substitutes maintain active inventory: MAX487EESA+ (1,415 units), MAX483EESA+T (20,100 units), MAX483ESA+T (4,900 units), MAX487EESA+T (23,610 units), MAX487ESA+T (55,100 units), ADM1485ARZ (19,566 units), ADM1485ARZ-REEL (30,400 units), ADM1485ARZ-REEL7 (15,100 units), ADM1485JRZ (16,500 units), ADM1485JRZ-REEL (19,479 units).

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