MAX485CPA+ Equivalent & Substitute Parts

Part Overview

The MAX485CPA+ is a half-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. This 8-pin DIP interface IC operates at 4.75V to 5.25V supply voltage with a 2.5 Mbps data rate and 70 mV receiver hysteresis. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified when electrical parameters, mechanical packaging, and functional specifications align with the original component, enabling direct replacement in circuit designs or providing alternatives when inventory constraints require component substitution.

Key Parameters

Parameter	MAX485CPA+ Specification
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	70 mV
Data Rate	2.5 Mbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution relationships for the MAX485CPA+ are established based on the following critical parameters: Protocol (RS422/RS485), Number of Drivers/Receivers (1/1), Duplex mode (Half), Receiver Hysteresis (70 mV), Data Rate (2.5 Mbps minimum), Supply Voltage range (4.75V ~ 5.25V), Package type (8-DIP), and Mounting type (Through Hole). Parts are grouped into three categories:

Parametric Equivalents share identical electrical specifications and package configuration, enabling direct pin-for-pin replacement: MAX1487CPA+, MAX1487ECPA+, MAX481CPA+, MAX481ECPA+, MAX485CPA+, and MAX485ECPA+.

Upgrade Options maintain core functionality and package compatibility but offer extended operating temperature ranges or enhanced data rates: LTC485IN8#PBF (extended temperature -40°C to 85°C) and ADM1485ANZ (5 Mbps data rate, extended temperature).

Manufacturer Recommended Alternatives provide enhanced performance specifications while maintaining electrical and mechanical compatibility: ADM1485ANZ (30 Mbps data rate, extended temperature -40°C to 85°C) and ADM1485JNZ (30 Mbps data rate, standard temperature 0°C to 70°C).

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temperature	Package	Inventory (Pcs)
MAX485CPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	3179
MAX1487CPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	2270
MAX1487ECPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	3289
MAX481CPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	4200
MAX481ECPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	4300
MAX485ECPA+	Analog Devices/Maxim	RS422, RS485	1/1	2.5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	1199
LTC485IN8#PBF	Analog Devices	RS422, RS485	1/1	Not specified	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	3555
ADM1485ANZ	Analog Devices	RS422, RS485	1/1	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	1920
ADM1485JNZ	Analog Devices	RS422, RS485	1/1	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	1800
ADM485ANZ	Analog Devices	RS422, RS485	1/1	5 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	4049

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting current regulatory requirements. Selection between parametric equivalents (MAX1487CPA+, MAX1487ECPA+, MAX481CPA+, MAX481ECPA+, MAX485ECPA+) is based on inventory availability and identical electrical specifications. The MAX481 and MAX1487 series provide functionally equivalent alternatives with the same 2.5 Mbps data rate and operating temperature range as the MAX485CPA+.

For applications requiring extended operating temperature performance, LTC485IN8#PBF and ADM1485ANZ support -40°C to 85°C operation while maintaining supply voltage and package compatibility. ADM1485JNZ provides 30 Mbps data rate capability within the standard 0°C to 70°C temperature range. ADM485ANZ offers 5 Mbps data rate with extended temperature range.

All substitute parts are manufactured by Analog Devices Inc. or Analog Devices Inc./Maxim Integrated, maintaining consistent quality and compliance certifications. Moisture Sensitivity Level 1 (Unlimited) applies uniformly across all parts, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can MAX1487CPA+ directly replace MAX485CPA+ in existing designs? A: Yes. MAX1487CPA+ is a parametric equivalent with identical protocol (RS422/RS485), driver/receiver configuration (1/1), data rate (2.5 Mbps), supply voltage (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), and 8-DIP package. Pin-for-pin replacement is supported.

Q: What is the difference between MAX481CPA+ and MAX485CPA+? A: Both parts share identical electrical specifications: RS422/RS485 protocol, 1/1 driver/receiver configuration, 2.5 Mbps data rate, 4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature, and 8-DIP packaging. The primary difference is the base product series designation (MAX481 vs. MAX485). Functional substitution is direct.

Q: When should ADM1485ANZ be selected over MAX485CPA+? A: ADM1485ANZ is selected when extended operating temperature (-40°C to 85°C) or higher data rate (30 Mbps) is required. Both parts maintain identical supply voltage (4.75V ~ 5.25V), 1/1 driver/receiver configuration, RS422/RS485 protocol, and 8-DIP package. ADM1485ANZ is manufacturer recommended for enhanced performance applications.

Q: Is LTC485IN8#PBF compatible with MAX485CPA+ in standard temperature applications? A: Yes. LTC485IN8#PBF maintains identical supply voltage (4.75V ~ 5.25V), protocol (RS422/RS485), driver/receiver configuration (1/1), and 8-DIP package. The extended temperature range (-40°C to 85°C) does not affect compatibility in 0°C to 70°C applications. Data rate specification is not provided for LTC485IN8#PBF.

Q: What is the significance of the "E" suffix in MAX485ECPA+ versus MAX485CPA+? A: Both MAX485CPA+ and MAX485ECPA+ are parametric equivalents with identical electrical and mechanical specifications. The suffix designation reflects manufacturing or qualification differences within the Maxim Integrated product line. Functional substitution is direct for both standard and extended-grade variants.

Q: Can ADM485ANZ replace MAX485CPA+ in 2.5 Mbps applications? A: ADM485ANZ operates at 5 Mbps, exceeding the 2.5 Mbps requirement of MAX485CPA+. Both parts maintain identical supply voltage (4.75V ~ 5.25V), protocol (RS422/RS485), 1/1 driver/receiver configuration, and 8-DIP package. The higher data rate capability does not create incompatibility in lower-speed applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

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