MAX490EESA RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX490EESA is a 1/1 full-duplex RS422/RS485 transceiver 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 ongoing system support and new designs. The MAX490EESA operates at 2.5 Mbps data rate with a 70 mV receiver hysteresis, designed for industrial communication applications requiring reliable serial data transmission over twisted-pair cabling.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX490EESA
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	2.5 Mbps
Receiver Hysteresis	70 mV
Voltage - Supply	4.75V ~ 5.25V
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)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MAX490EESA is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Protocol: RS422/RS485
Number of Drivers/Receivers: 1/1
Duplex: Full
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply: 4.75V ~ 5.25V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Performance Parameters (Data Rate and Receiver Hysteresis): Substitutes are grouped by data rate capability and receiver hysteresis specifications. Parts with equal or superior data rate performance and compatible hysteresis values are considered direct equivalents. Parts with lower data rates or different hysteresis values are classified as manufacturer-recommended alternatives suitable for specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Packaging	Inventory
MAX490EESA	Analog Devices Inc./Maxim Integrated	Obsolete	2.5 Mbps	70 mV	Tube	1600 Pcs
MAX490EESA+	Analog Devices Inc./Maxim Integrated	Active	2.5 Mbps	70 mV	Tube	2288 Pcs
MAX490ESA+	Analog Devices Inc./Maxim Integrated	Active	2.5 Mbps	70 mV	Tube	2100 Pcs
LTC490IS8#PBF	Analog Devices Inc.	Active	—	70 mV	Tube	2600 Pcs
LTC490IS8#TRPBF	Analog Devices Inc.	Active	—	70 mV	Tape & Reel (TR)	2400 Pcs
ADM4854ARZ	Analog Devices Inc.	Active	115 Kbps	20 mV	Tube	3100 Pcs
ADM4855ARZ	Analog Devices Inc.	Active	500 Kbps	20 mV	Tube	2927 Pcs
ADM4856ARZ	Analog Devices Inc.	Active	2.5 Mbps	20 mV	Tube	9846 Pcs
ADM4856ARZ-REEL7	Analog Devices Inc.	Active	2.5 Mbps	20 mV	Cut Tape (CT) & Digi-Reel®	1519 Pcs
ADM4857ARZ	Analog Devices Inc.	Active	10 Mbps	20 mV	Tube	1955 Pcs
ADM4857ARZ-REEL7	Analog Devices Inc.	Active	10 Mbps	20 mV	Cut Tape (CT) & Digi-Reel®	3600 Pcs

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements): MAX490EESA+ and MAX490ESA+ are parametric equivalents with identical electrical specifications and package configuration. Both parts are in active product status, providing long-term availability. These parts are recommended as primary replacements for obsolete MAX490EESA inventory.

Direct Manufacturer Alternatives: LTC490IS8#PBF and LTC490IS8#TRPBF are direct manufacturer alternatives from Analog Devices Inc. with matching receiver hysteresis (70 mV) and identical package dimensions. These parts are in active status and available in both tube and tape & reel packaging options.

Manufacturer-Recommended Alternatives: ADM4854ARZ, ADM4855ARZ, ADM4856ARZ, ADM4856ARZ-REEL7, ADM4857ARZ, and ADM4857ARZ-REEL7 are manufacturer-recommended alternatives with reduced receiver hysteresis (20 mV) and varying data rate capabilities. ADM4856ARZ and ADM4856ARZ-REEL7 match the 2.5 Mbps data rate of the original part. ADM4857ARZ and ADM4857ARZ-REEL7 provide enhanced 10 Mbps performance. All alternatives maintain ROHS3 compliance, MSL 1 rating, and identical supply voltage and operating temperature ranges. Selection among these alternatives depends on application data rate requirements and packaging preferences.

Frequently Asked Questions (FAQ)

Q: Can MAX490EESA+ be used as a direct replacement for MAX490EESA? A: Yes. MAX490EESA+ is a parametric equivalent with identical electrical specifications, package configuration, and performance characteristics. The primary difference is product status: MAX490EESA+ is active while MAX490EESA is obsolete.

Q: What is the difference between MAX490ESA+ and MAX490EESA+? A: Both parts are parametric equivalents with identical electrical specifications and package configuration. The difference is in the part number suffix designation. Both are in active product status and suitable for replacement applications.

Q: Are LTC490IS8#PBF and LTC490IS8#TRPBF interchangeable with MAX490EESA? A: Yes, with packaging consideration. Both LTC490 variants match the receiver hysteresis (70 mV) and package dimensions of MAX490EESA. LTC490IS8#PBF is supplied in tube packaging, while LTC490IS8#TRPBF is supplied in tape & reel format. Electrical performance is identical; selection depends on assembly process requirements.

Q: Why do ADM4856ARZ and ADM4857ARZ have different data rates? A: ADM4856ARZ supports 2.5 Mbps data rate, matching the original MAX490EESA specification. ADM4857ARZ provides enhanced 10 Mbps performance for applications requiring higher data transmission speeds. Both maintain identical supply voltage, operating temperature, and package configuration.

Q: What does receiver hysteresis mean in transceiver selection? A: Receiver hysteresis is the voltage difference between the rising and falling threshold levels of the receiver input. MAX490EESA specifies 70 mV hysteresis, while ADM485x series parts specify 20 mV. Lower hysteresis provides tighter noise margins but may require cleaner signal conditioning in noisy environments.

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 requirements of the original MAX490EESA.

Q: What packaging options are available for ADM4856ARZ? A: ADM4856ARZ is available in two packaging formats: standard tube (ADM4856ARZ) and cut tape with Digi-Reel® (ADM4856ARZ-REEL7). Both formats contain identical electrical specifications and are suitable for different manufacturing processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message