MAX483ECSA Equivalent & Substitute Parts

Part Overview

The MAX483ECSA is a half-duplex RS422/RS485 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The MAX483ECSA operates at 250 kbps data rate with a 4.75V to 5.25V supply voltage range and 0°C to 70°C operating temperature specification. Substitute parts must maintain electrical compatibility across protocol support, duplex configuration, driver/receiver count, and physical packaging while meeting current RoHS compliance requirements.

Key Parameters

Parameter	MAX483ECSA
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	70 mV
Data Rate	250 kbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the MAX483ECSA are grouped into two categories based on substitution criteria:

Parametric Equivalents (MAX483CSA+, MAX483ECSA+, MAX487CSA+, MAX487ECSA+): These parts maintain identical electrical specifications including 1/1 driver/receiver configuration, half-duplex operation, 70 mV receiver hysteresis, 250 kbps data rate, 4.75V to 5.25V supply voltage, and 8-SOIC packaging. All parametric equivalents are active products with ROHS3 compliance. The MAX487 variants use an alternative base product number but retain all critical electrical parameters required for direct substitution.

Manufacturer Recommended Alternatives (ADM1485 and ADM1486 series): These parts share the same 1/1 driver/receiver configuration, half-duplex operation, 70 mV receiver hysteresis, 4.75V to 5.25V supply voltage, and 8-SOIC packaging. However, they feature enhanced data rate capability (30 Mbps versus 250 kbps) and extended operating temperature ranges (-40°C to 85°C for industrial grades). These alternatives are active products with ROHS3 compliance and represent performance upgrades suitable for applications requiring higher data rates or wider temperature operation.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Product Status	RoHS Status
MAX483ECSA	Analog Devices/Maxim	RS422, RS485	1/1	Half	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Obsolete	Non-compliant
MAX483CSA+	Analog Devices/Maxim	RS422, RS485	1/1	Half	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
MAX483ECSA+	Analog Devices/Maxim	RS422, RS485	1/1	Half	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
MAX487CSA+	Analog Devices/Maxim	RS422, RS485	1/1	Half	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
MAX487ECSA+	Analog Devices/Maxim	RS422, RS485	1/1	Half	70 mV	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
ADM1485ARZ	Analog Devices	RS422, RS485	1/1	Half	70 mV	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
ADM1485JRZ	Analog Devices	RS422, RS485	1/1	Half	70 mV	30 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	ROHS3 Compliant
ADM1486ARZ	Analog Devices	RS422, RS485	1/1	Half	70 mV	30 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of MAX483ECSA in existing designs, select from the parametric equivalent group: MAX483CSA+, MAX483ECSA+, MAX487CSA+, or MAX487ECSA+. These parts maintain identical electrical performance and operating temperature specifications while providing ROHS3 compliance and active product status. All parametric equivalents are available in higher inventory quantities than the obsolete MAX483ECSA.

For new designs or applications requiring enhanced performance, the ADM1485 and ADM1486 series offer 30 Mbps data rate capability and extended temperature operation. ADM1485JRZ matches the original 0°C to 70°C temperature range while providing higher data rate performance. ADM1485ARZ and ADM1486ARZ extend operation to -40°C to 85°C for industrial applications. All ADM alternatives maintain ROHS3 compliance and are actively manufactured.

Selection between parametric equivalents should consider packaging format (tube versus cut tape/reel) and inventory availability. Selection between parametric equivalents and ADM alternatives depends on whether the application requires the enhanced 30 Mbps data rate capability or extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can MAX483ECSA be directly replaced with MAX483CSA+ or MAX483ECSA+? A: Yes. MAX483CSA+ and MAX483ECSA+ are parametric equivalents with identical electrical specifications, including data rate, supply voltage, operating temperature, receiver hysteresis, and 8-SOIC packaging. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: What is the difference between MAX483 and MAX487 variants? A: MAX483 and MAX487 variants share identical electrical parameters including 1/1 driver/receiver configuration, half-duplex operation, 70 mV receiver hysteresis, 250 kbps data rate, 4.75V to 5.25V supply voltage, and 8-SOIC packaging. The base product number differs, but substitution is valid based on electrical equivalence.

Q: Can ADM1485 or ADM1486 replace MAX483ECSA? A: ADM1485 and ADM1486 series are compatible substitutes that maintain the same 1/1 driver/receiver configuration, half-duplex operation, 70 mV receiver hysteresis, supply voltage, and 8-SOIC packaging. However, they provide enhanced 30 Mbps data rate versus the original 250 kbps specification. For applications operating at 250 kbps or lower, ADM alternatives are backward compatible. For applications requiring the original 250 kbps specification without higher data rate capability, parametric equivalents are preferred.

Q: What is the difference between ADM1485ARZ and ADM1485JRZ? A: Both parts share identical electrical specifications and 30 Mbps data rate. The primary difference is operating temperature range: ADM1485ARZ operates from -40°C to 85°C (industrial grade), while ADM1485JRZ operates from 0°C to 70°C (commercial grade). Select ADM1485ARZ for extended temperature applications and ADM1485JRZ for standard commercial temperature range.

Q: What packaging options are available for substitute parts? A: Parametric equivalents (MAX483CSA+, MAX483ECSA+, MAX487CSA+, MAX487ECSA+) are available in tube packaging. ADM1485 and ADM1486 series are available in tube packaging and cut tape with Digi-Reel options. Packaging selection does not affect electrical compatibility; choose based on assembly process requirements and inventory management.

Q: Are all substitute parts RoHS compliant? A: All substitute parts listed are ROHS3 compliant. The original MAX483ECSA is RoHS non-compliant. For applications requiring RoHS compliance, any of the listed substitutes are suitable.

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