MAX1483ESA-T Equivalent & Substitute Parts

Part Overview

The MAX1483ESA-T 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, with 981 pieces available in new original stock. Due to its obsolete status and limited availability, identifying equivalent and substitute parts is necessary for design continuity and procurement flexibility. Active alternatives from Analog Devices provide enhanced performance specifications and improved compliance certifications while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Specification
Manufacturer Part Number	MAX1483ESA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	75 mV
Data Rate	250 kbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX1483ESA-T is determined by the following critical parameters that must remain constant or compatible:

Mandatory Compatibility Parameters:

Protocol: RS422/RS485 half-duplex operation
Number of Drivers/Receivers: 1/1 configuration
Duplex Mode: Half-duplex
Package Type: 8-SOIC form factor
Supply Voltage Range: 4.75V ~ 5.25V
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface Mount

Performance Parameters (Allowable Variation):

Receiver Hysteresis: 70 mV to 75 mV (minor variation acceptable)
Data Rate: 250 kbps to 30 Mbps (higher data rates are backward compatible)

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications with different packaging) and manufacturer-recommended alternatives (enhanced performance with maintained compatibility).

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	RoHS Status	Inventory
MAX1483ESA-T	Analog Devices/Maxim	Obsolete	250 kbps	75 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Non-compliant	981
MAX1483ESA+T	Analog Devices/Maxim	Active	250 kbps	75 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	20,100
ADM1485ARZ	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	19,566
ADM1485ARZ-REEL	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	30,400
ADM1485ARZ-REEL7	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	15,100
ADM1486ARZ	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	9,798
ADM1486ARZ-REEL	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	220,788
ADM1486ARZ-REEL7	Analog Devices	Active	30 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	4,269
ADM1487EARZ	Analog Devices	Active	2.5 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	1,964
ADM1487EARZ-REEL7	Analog Devices	Active	2.5 Mbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	2,300
ADM483ARZ	Analog Devices	Active	250 kbps	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	15,420

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): MAX1483ESA+T is the active production equivalent of MAX1483ESA-T. It maintains identical electrical specifications (250 kbps data rate, 75 mV hysteresis) and package configuration while offering ROHS3 compliance and significantly higher inventory availability (20,100 units). This part is the primary recommendation for direct substitution in new designs or production restocking.

Manufacturer-Recommended Alternatives: The ADM1485 and ADM1486 series provide enhanced performance with 30 Mbps data rate capability while maintaining backward compatibility with 250 kbps operation. These parts are suitable for applications requiring higher bandwidth headroom. The ADM1486ARZ-REEL variant offers the highest inventory level (220,788 units) among active alternatives.

The ADM483ARZ provides identical 250 kbps data rate performance with ROHS3 compliance and represents an alternative from the same manufacturer family.

The ADM1487EARZ series operates at 2.5 Mbps and is suitable only for applications with lower bandwidth requirements.

All recommended substitutes maintain the 8-SOIC package form factor, 4.75V to 5.25V supply voltage range, and -40°C to 85°C operating temperature specification. All active alternatives carry ROHS3 compliance certification, addressing regulatory requirements not met by the obsolete MAX1483ESA-T.

Frequently Asked Questions (FAQ)

Q: Can MAX1483ESA+T be used as a direct replacement for MAX1483ESA-T? A: Yes. MAX1483ESA+T is the active production equivalent with identical electrical specifications and 8-SOIC package. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Electrical performance and pinout are equivalent.

Q: What is the difference between ADM1485ARZ, ADM1485ARZ-REEL, and ADM1485ARZ-REEL7? A: These part numbers represent the same IC with different packaging formats. ADM1485ARZ is supplied in Tube packaging, while ADM1485ARZ-REEL and ADM1485ARZ-REEL7 are supplied in Cut Tape and Digi-Reel formats. Electrical specifications are identical; selection depends on procurement and assembly requirements.

Q: Can ADM1486ARZ-REEL replace MAX1483ESA-T in existing designs? A: Yes, with consideration for data rate capability. ADM1486ARZ-REEL operates at 30 Mbps versus the MAX1483ESA-T's 250 kbps. The higher data rate is backward compatible with lower-speed applications. Pin configuration, package, supply voltage, and temperature range are compatible. Verify application requirements do not depend on specific hysteresis characteristics (70 mV vs. 75 mV).

Q: Why do some substitutes have lower data rates (ADM1487EARZ at 2.5 Mbps)? A: ADM1487EARZ is a lower-speed variant suitable only for applications with reduced bandwidth requirements. It is not recommended as a general replacement for MAX1483ESA-T unless the application specifically operates below 2.5 Mbps and cost optimization is a priority.

Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed (ADM1485, ADM1486, ADM1487, ADM483 series) carry ROHS3 compliance certification. The original MAX1483ESA-T is RoHS non-compliant. This is a key advantage of migration to active alternatives for new designs subject to RoHS requirements.

Q: What is the impact of receiver hysteresis difference (75 mV vs. 70 mV)? A: Receiver hysteresis affects noise immunity and switching threshold characteristics. The 5 mV difference between MAX1483ESA-T (75 mV) and most ADM alternatives (70 mV) is minor and acceptable for standard RS422/RS485 applications. Verify application-specific noise margin requirements if operating in electrically noisy environments.

Q: Which substitute offers the best inventory availability? A: ADM1486ARZ-REEL provides the highest inventory level at 220,788 units. For immediate availability with identical electrical specifications to the original part, MAX1483ESA+T offers 20,100 units in stock.

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