MAX488EESA-T RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX488EESA-T 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 design support and procurement. The MAX488EESA-T operates at 250 kbps data rate with 70 mV receiver hysteresis and is designed for industrial communication applications requiring RS422 or RS485 protocol support.

Key Parameters

Parameter	MAX488EESA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Data Rate	250 kbps
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
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MAX488EESA-T is determined by the following critical parameters:

Protocol Compatibility: RS422/RS485 full-duplex transceiver functionality
Driver/Receiver Configuration: 1/1 configuration (one driver, one receiver)
Package Type: 8-SOIC surface mount package
Supply Voltage Range: 4.75V ~ 5.25V or compatible range
Operating Temperature: -40°C ~ 85°C
Data Rate: 250 kbps or higher capability
Receiver Hysteresis: 70 mV or lower (lower hysteresis provides tighter noise margins)

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and are direct replacements with the same data rate and receiver hysteresis characteristics.

Manufacturer Recommended Alternatives offer enhanced performance specifications (higher data rates, improved receiver hysteresis) while maintaining core RS422/RS485 functionality, supply voltage compatibility, and package form factor.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Supply Voltage	Packaging	RoHS Status
MAX488EESA-T	Analog Devices Inc./Maxim Integrated	Obsolete	250 kbps	70 mV	4.75V ~ 5.25V	Tube	RoHS non-compliant
MAX488EESA+T	Analog Devices Inc./Maxim Integrated	Active	250 kbps	70 mV	4.75V ~ 5.25V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
MAX488ESA+T	Analog Devices Inc./Maxim Integrated	Active	250 kbps	70 mV	4.75V ~ 5.25V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
ADM488ARZ-REEL	Analog Devices Inc.	Active	250 kbps	70 mV	4.5V ~ 5.5V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
ADM488ARZ-REEL7	Analog Devices Inc.	Active	250 kbps	70 mV	4.5V ~ 5.5V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
ADM4854ARZ	Analog Devices Inc.	Active	115 kbps	20 mV	4.75V ~ 5.25V	Tube	ROHS3 Compliant
ADM4855ARZ	Analog Devices Inc.	Active	500 kbps	20 mV	4.75V ~ 5.25V	Tube	ROHS3 Compliant
ADM4856ARZ	Analog Devices Inc.	Active	2.5 Mbps	20 mV	4.75V ~ 5.25V	Tube	ROHS3 Compliant
ADM4856ARZ-REEL7	Analog Devices Inc.	Active	2.5 Mbps	20 mV	4.75V ~ 5.25V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
ADM4857ARZ	Analog Devices Inc.	Active	10 Mbps	20 mV	4.75V ~ 5.25V	Tube	ROHS3 Compliant
ADM4857ARZ-REEL7	Analog Devices Inc.	Active	10 Mbps	20 mV	4.75V ~ 5.25V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents): MAX488EESA+T and MAX488ESA+T are parametric equivalents with identical electrical specifications. Both are active products with ROHS3 compliance, addressing the obsolescence and RoHS non-compliance status of the original MAX488EESA-T. MAX488ESA+T offers the highest inventory availability (23,749 units) and is the preferred choice for new procurement.

Supply Voltage Consideration: ADM488ARZ-REEL and ADM488ARZ-REEL7 maintain identical data rate and receiver hysteresis but support an extended supply voltage range (4.5V ~ 5.5V) compared to the original specification (4.75V ~ 5.25V). These parts are suitable for applications requiring broader voltage tolerance.

Enhanced Performance Alternatives: For applications capable of operating at higher data rates, the ADM4855ARZ (500 kbps), ADM4856ARZ (2.5 Mbps), and ADM4857ARZ (10 Mbps) series provide improved receiver hysteresis (20 mV) and higher bandwidth while maintaining RS422/RS485 protocol support and 8-SOIC package compatibility. All are active products with ROHS3 compliance.

Packaging Considerations: Tube packaging is available for ADM4854ARZ, ADM4855ARZ, ADM4856ARZ, and ADM4857ARZ. Cut Tape (CT) & Digi-Reel® packaging is available for MAX488EESA+T, MAX488ESA+T, ADM488ARZ-REEL, ADM488ARZ-REEL7, ADM4856ARZ-REEL7, and ADM4857ARZ-REEL7.

Frequently Asked Questions (FAQ)

Q: Can MAX488EESA+T or MAX488ESA+T be used as direct replacements for MAX488EESA-T?

A: Yes. Both parts maintain identical electrical specifications including 250 kbps data rate, 70 mV receiver hysteresis, 4.75V ~ 5.25V supply voltage, and 8-SOIC package. Both are active products with ROHS3 compliance, eliminating obsolescence and regulatory concerns.

Q: What is the difference between ADM488ARZ-REEL and ADM488ARZ-REEL7?

A: Both parts are electrically identical with 250 kbps data rate and 70 mV receiver hysteresis. The difference is in packaging format: ADM488ARZ-REEL and ADM488ARZ-REEL7 both use Cut Tape (CT) & Digi-Reel® packaging. The primary distinction is in reel configuration for automated assembly processes.

Q: Can ADM4857ARZ be used in place of MAX488EESA-T?

A: ADM4857ARZ is electrically compatible for RS422/RS485 protocol and 8-SOIC package, but operates at 10 Mbps data rate with 20 mV receiver hysteresis, compared to the original 250 kbps and 70 mV. This part is suitable only if the application can accommodate higher performance specifications and does not require the original hysteresis characteristics.

Q: What is the significance of receiver hysteresis in transceiver selection?

A: Receiver hysteresis determines the noise immunity of the transceiver. The original MAX488EESA-T specifies 70 mV hysteresis. Substitute parts with lower hysteresis (20 mV) provide tighter noise margins and are suitable for cleaner signal environments. Higher hysteresis values provide greater noise immunity in electrically noisy environments.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The original MAX488EESA-T is RoHS non-compliant. Compliance status is an important consideration for applications subject to environmental regulations.

Q: What supply voltage range should be considered when selecting a substitute?

A: The original MAX488EESA-T operates at 4.75V ~ 5.25V. ADM488ARZ-REEL and ADM488ARZ-REEL7 support 4.5V ~ 5.5V, providing broader voltage tolerance. All other substitutes maintain the 4.75V ~ 5.25V range. Select based on your application's power supply specifications.

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