MAX3490EESA-T Equivalent & Substitute Parts

Part Overview

The MAX3490EESA-T is a 1/1 full-duplex RS422/RS485 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated in 8-SOIC surface mount packaging. This component operates at 3V to 3.6V supply voltage with a 10 Mbps data rate and is designed for industrial serial communication applications. The part is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing production and design continuity.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	50 mV
Data Rate	10 Mbps
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX3490EESA-T is determined by strict equivalence across the following critical parameters:

Protocol: RS422/RS485 full-duplex operation
Number of Drivers/Receivers: 1/1 configuration
Duplex Mode: Full-duplex capability
Receiver Hysteresis: 50 mV
Data Rate: 10 Mbps minimum
Supply Voltage: 3V to 3.6V range
Operating Temperature: -40°C to 85°C
Package: 8-SOIC form factor
Compliance: ROHS3 and REACH requirements

Substitute parts are grouped into two categories: parametric equivalents (identical specifications) and manufacturer-recommended alternatives (same functional class with equivalent electrical performance within the specified operating range).

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Supply Voltage	Receiver Hysteresis	Package	Packaging Type	Inventory (Pcs)
MAX3490EESA-T	Analog Devices Inc./Maxim Integrated	Obsolete	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Standard	738
MAX3490EESA+T	Analog Devices Inc./Maxim Integrated	Active	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Cut Tape (CT) & Digi-Reel®	35400
MAX3490ESA+T	Analog Devices Inc./Maxim Integrated	Active	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Cut Tape (CT) & Digi-Reel®	25200
ADM3490ARZ	Analog Devices Inc.	Active	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Tube	12939
ADM3490EARZ	Analog Devices Inc.	Active	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Tube	1420
ADM3488ARZ	Analog Devices Inc.	Active	250 kbps	3V ~ 3.6V	50 mV	8-SOIC	Tube	1121
ADM3488ARZ-REEL7	Analog Devices Inc.	Active	250 kbps	3V ~ 3.6V	50 mV	8-SOIC	Cut Tape (CT) & Digi-Reel®	2200
ADM3488EARZ	Analog Devices Inc.	Active	250 kbps	3V ~ 3.6V	50 mV	8-SOIC	Tube	12800
ADM3488EARZ-REEL7	Analog Devices Inc.	Active	250 kbps	3V ~ 3.6V	50 mV	8-SOIC	Tape & Reel (TR)	3900
ISL83490IBZ	Renesas Electronics Corporation	Active	10 Mbps	3V ~ 3.6V	50 mV	8-SOIC	Tube	1491
LTC1690IS8#PBF	Analog Devices Inc.	Active	5 Mbps	4.75V ~ 5.25V	30 mV	8-SOIC	Tube	1706

Engineering Selection Recommendations

For direct replacement of the obsolete MAX3490EESA-T, the following active parts provide full parametric equivalence:

Primary Equivalents (10 Mbps, 3V-3.6V Supply):

MAX3490EESA+T and MAX3490ESA+T are direct parametric equivalents manufactured by Analog Devices Inc./Maxim Integrated with identical electrical specifications and 8-SOIC packaging. Both parts are in active production status with substantial inventory availability.
ADM3490ARZ and ADM3490EARZ are manufacturer-recommended alternatives from Analog Devices Inc. with identical performance parameters and active product status. These parts differ only in packaging format (Tube vs. standard).
ISL83490IBZ from Renesas Electronics Corporation meets all electrical and mechanical requirements with active status. MSL rating differs at 3 (168 Hours) versus the original 1 (Unlimited).

Secondary Alternatives (Lower Data Rate, 3V-3.6V Supply):

ADM3488 series parts (ARZ, ARZ-REEL7, EARZ, EARZ-REEL7) operate at 250 kbps data rate, which is lower than the 10 Mbps specification. These are suitable only for applications where reduced bandwidth is acceptable.

Not Recommended:

LTC1690IS8#PBF operates at 4.75V to 5.25V supply voltage, outside the 3V-3.6V range of the original part, and features 5 Mbps data rate with 30 mV receiver hysteresis. This part is not compatible with the MAX3490EESA-T electrical requirements.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX3490EESA+T directly replace MAX3490EESA-T? A: Yes. MAX3490EESA+T is a parametric equivalent with identical electrical specifications, 8-SOIC packaging, and RS422/RS485 protocol support. The difference is product status (Active vs. Obsolete) and packaging format (Cut Tape & Digi-Reel® vs. standard). Functional compatibility is complete.

Q: What is the difference between ADM3490ARZ and ADM3490EARZ? A: Both parts are manufacturer-recommended equivalents with identical electrical performance (10 Mbps, 3V-3.6V, 50 mV hysteresis, 8-SOIC). The difference is packaging format: ADM3490ARZ is supplied in Tube, while ADM3490EARZ is also supplied in Tube. Inventory levels differ, with ADM3490ARZ having higher availability (12939 Pcs vs. 1420 Pcs).

Q: Why is the ADM3488 series listed as a substitute if the data rate is only 250 kbps? A: The ADM3488 series meets the core electrical and mechanical parameters (3V-3.6V supply, 50 mV hysteresis, 8-SOIC package, RS422/RS485 protocol, 1/1 full-duplex configuration). However, the 250 kbps data rate is significantly lower than the 10 Mbps specification of the MAX3490EESA-T. These parts are suitable only for applications with reduced bandwidth requirements.

Q: Is ISL83490IBZ from Renesas a suitable replacement? A: ISL83490IBZ meets all critical electrical and mechanical specifications (10 Mbps, 3V-3.6V supply, 50 mV hysteresis, 8-SOIC package, RS422/RS485 full-duplex). The part is in active production. The MSL rating is 3 (168 Hours) compared to the original 1 (Unlimited), which may affect moisture handling during storage and assembly.

Q: Why is LTC1690IS8#PBF not recommended? A: LTC1690IS8#PBF operates at 4.75V to 5.25V supply voltage, which is outside the 3V-3.6V range of the MAX3490EESA-T. Additionally, the 5 Mbps data rate and 30 mV receiver hysteresis differ from the original specifications. This part is not electrically compatible.

Q: What packaging options are available for active equivalents? A: Active equivalents are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel® (MAX3490EESA+T, MAX3490ESA+T, ADM3488ARZ-REEL7, ADM3488EARZ-REEL7), Tube (ADM3490ARZ, ADM3490EARZ, ADM3488ARZ, ADM3488EARZ, ISL83490IBZ, LTC1690IS8#PBF), and Tape & Reel (TR) (ADM3488EARZ-REEL7). Selection depends on assembly process requirements and volume.

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