MAX487CPA+ RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The MAX487CPA+ is an active RS422/RS485 half-duplex transceiver manufactured by Analog Devices Inc./Maxim Integrated, designed for industrial communication applications requiring reliable serial data transmission over twisted-pair cabling. The device operates as a 1/1 driver/receiver configuration with a data rate of 250 kbps and is packaged in an 8-pin DIP form factor suitable for through-hole mounting. The part maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and protocol support to ensure seamless integration in existing designs or as alternatives when primary inventory is unavailable.

Key Parameters

Parameter	Specification
Manufacturer Part Number	MAX487CPA+
Manufacturer	Analog Devices Inc./Maxim Integrated
Protocol Support	RS422, RS485
Type	Transceiver Half-Duplex
Number of Drivers/Receivers	1/1
Data Rate	250 kbps
Receiver Hysteresis	70 mV
Supply Voltage Range	4.75V ~ 5.25V
Operating Temperature Range	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX487CPA+ are classified into two categories based on substitution type and electrical compatibility:

Parametric Equivalents share identical electrical specifications including 250 kbps data rate, 70 mV receiver hysteresis, 4.75V ~ 5.25V supply voltage, 0°C ~ 70°C operating temperature, and 8-DIP package configuration. These parts are direct functional replacements within the same performance envelope.

Manufacturer Recommended Substitutes are qualified alternatives from Analog Devices Inc. and Renesas Electronics Corporation that maintain RS422/RS485 protocol support, 1/1 driver/receiver configuration, 70 mV receiver hysteresis, 4.75V ~ 5.25V supply voltage, and 8-DIP package compatibility. These parts may differ in data rate capability (5 Mbps to 30 Mbps) and operating temperature range (-40°C ~ 85°C), providing enhanced performance specifications while maintaining mechanical and electrical interface compatibility.

Key parameters determining substitution eligibility: Protocol support (RS422/RS485), duplex configuration (half-duplex), driver/receiver count (1/1), receiver hysteresis (70 mV), supply voltage range (4.75V ~ 5.25V minimum), package type (8-DIP), and mounting method (through-hole).

Parameter Comparison

Part Number	Manufacturer	Protocol	Data Rate	Supply Voltage	Operating Temp	Package	Inventory (Pcs)	Substitution Type
MAX487CPA+	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	2940	Main Part
MAX483CPA+	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	15400	Parametric Equivalent
MAX483ECPA+	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	4100	Parametric Equivalent
MAX487ECPA+	Analog Devices/Maxim	RS422, RS485	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	2100	Parametric Equivalent
ADM1485ANZ	Analog Devices	RS422, RS485	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	1920	MFR Recommended
ADM1485JNZ	Analog Devices	RS422, RS485	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	1800	MFR Recommended
ADM485ANZ	Analog Devices	RS422, RS485	5 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	4049	MFR Recommended
ADM485JNZ	Analog Devices	RS422, RS485	5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	6300	MFR Recommended
ISL81487EIPZ	Renesas Electronics	RS422, RS485	5 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-DIP	2007	MFR Recommended
ISL81487LIPZ	Renesas Electronics	RS422, RS485	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-DIP	6300	MFR Recommended

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents): MAX483CPA+, MAX483ECPA+, and MAX487ECPA+ provide identical electrical performance to the MAX487CPA+ with matching 250 kbps data rate, supply voltage, operating temperature, and package specifications. These parts are suitable for one-to-one substitution in existing designs without circuit modification. Selection among these equivalents may be based on inventory availability and lead time requirements.

Enhanced Performance Alternatives (MFR Recommended): ADM1485ANZ and ADM1485JNZ offer 30 Mbps data rate capability while maintaining 4.75V ~ 5.25V supply voltage compatibility and 8-DIP package form factor. The ADM1485ANZ variant supports extended temperature operation (-40°C ~ 85°C), while ADM1485JNZ maintains the standard 0°C ~ 70°C range. These parts are suitable for applications requiring higher bandwidth than the 250 kbps specification.

Extended Temperature Operation: ADM485ANZ and ISL81487EIPZ provide -40°C ~ 85°C operating range with ROHS3 compliance and EAR99 export classification. ISL81487LIPZ from Renesas Electronics offers 250 kbps data rate with extended temperature and slightly wider supply voltage tolerance (4.5V ~ 5.5V), providing compatibility with systems requiring enhanced thermal performance.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and through-hole 8-DIP package compatibility. Selection should be based on specific application requirements for data rate, operating temperature range, and supply voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX483CPA+ be used as a direct replacement for MAX487CPA+? A: Yes. MAX483CPA+ is a parametric equivalent with identical electrical specifications including 250 kbps data rate, 70 mV receiver hysteresis, 4.75V ~ 5.25V supply voltage, 0°C ~ 70°C operating temperature, and 8-DIP package configuration. No circuit modifications are required.

Q: What is the difference between parametric equivalents and manufacturer recommended substitutes? A: Parametric equivalents (MAX483CPA+, MAX483ECPA+, MAX487ECPA+) match all electrical specifications of the MAX487CPA+. Manufacturer recommended substitutes (ADM1485, ADM485, ISL81487 series) maintain protocol support, package compatibility, and supply voltage range but may offer different data rate capabilities (5 Mbps to 30 Mbps) and extended operating temperature ranges (-40°C ~ 85°C).

Q: Is the ISL81487LIPZ compatible with the MAX487CPA+ in terms of package and pinout? A: Yes. ISL81487LIPZ uses the same 8-DIP (0.300", 7.62mm) through-hole package as MAX487CPA+. Both devices support RS422/RS485 protocols with 1/1 driver/receiver configuration and 70 mV receiver hysteresis. The ISL81487LIPZ offers 250 kbps data rate matching and extended temperature operation (-40°C ~ 85°C) with slightly wider supply voltage tolerance (4.5V ~ 5.5V).

Q: Which substitute part should I select for applications requiring higher data rates? A: ADM1485ANZ and ADM1485JNZ support 30 Mbps data rate, providing significant bandwidth enhancement over the 250 kbps MAX487CPA+ specification. Both maintain 4.75V ~ 5.25V supply voltage and 8-DIP package compatibility. ADM1485ANZ supports -40°C ~ 85°C operation, while ADM1485JNZ maintains 0°C ~ 70°C range.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the environmental and regulatory status of the MAX487CPA+.

Q: What supply voltage range should I verify when selecting a substitute? A: The MAX487CPA+ operates within 4.75V ~ 5.25V. Most substitutes (MAX483, MAX487E, ADM1485, ADM485 series) maintain this range. ISL81487 series parts offer slightly wider tolerance at 4.5V ~ 5.5V, providing additional margin in systems with variable supply voltage.

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