ISL8487IB-T RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The ISL8487IB-T is a half-duplex RS422/RS485 transceiver manufactured by Renesas Electronics Corporation in an 8-SOIC surface mount package. This part is classified as obsolete, with 1,165 units currently in stock. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing system support, design updates, and long-term component availability planning.

Key Parameters

Parameter	ISL8487IB-T
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS422, RS485
Duplex Configuration	Half
Number of Drivers/Receivers	1/1
Data Rate	250 kbps
Receiver Hysteresis	70 mV
Supply Voltage Range	4.5V – 5.5V
Operating Temperature Range	-40°C to 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 eligibility is determined by strict alignment with the following critical parameters:

Protocol Compatibility: RS422/RS485 half-duplex operation
Driver/Receiver Configuration: 1/1 topology
Package Type: 8-SOIC form factor (0.154", 3.90mm Width)
Electrical Specifications: Supply voltage range, data rate, receiver hysteresis, operating temperature
Mounting Type: Surface mount

Substitute parts are categorized into two groups:

Parametric Equivalents maintain identical electrical specifications and are direct functional replacements from the same manufacturer (Renesas ISL series).

Similar Parts share the same protocol, package, and core functionality but originate from different manufacturers (Analog Devices/Maxim Integrated) and may have minor variations in supply voltage range, data rate, or receiver hysteresis within acceptable operating margins.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
ISL8487IB-T	Renesas	RS422/RS485	1/1	250 kbps	70 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Obsolete	Non-compliant
ISL81483IBZ-T	Renesas	RS422/RS485	1/1	250 kbps	70 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
ISL8483EIBZ-T	Renesas	RS422/RS485	1/1	250 kbps	70 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
ISL8483EIBZ-T7A	Renesas	RS422/RS485	1/1	250 kbps	70 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Obsolete	ROHS3 Compliant
ISL8487EIBZ-T	Renesas	RS422/RS485	1/1	250 kbps	70 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
ADM487EARZ	Analog Devices	RS422/RS485	1/1	250 kbps	70 mV	4.75V – 5.25V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
ADM487EARZ-REEL7	Analog Devices	RS422/RS485	1/1	250 kbps	70 mV	4.75V – 5.25V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
MAX14780EESA+T	Analog Devices/Maxim	RS422/RS485	1/1	20 Mbps	50 mV	4.5V – 5.5V	-40°C to 85°C	8-SOIC	Active	ROHS3 Compliant
MAX487CSA+	Analog Devices/Maxim	RS422/RS485	1/1	250 kbps	70 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	ROHS3 Compliant
MAX487CSA+T	Analog Devices/Maxim	RS422/RS485	1/1	250 kbps	70 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	ROHS3 Compliant
MAX487ECSA+	Analog Devices/Maxim	RS422/RS485	1/1	250 kbps	70 mV	4.75V – 5.25V	0°C to 70°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

ISL81483IBZ-T, ISL8483EIBZ-T, and ISL8487EIBZ-T are the primary candidates. All three maintain identical electrical specifications to the ISL8487IB-T and are manufactured by Renesas. ISL81483IBZ-T and ISL8487EIBZ-T carry Active product status with ROHS3 compliance, making them suitable for new designs and long-term availability. ISL8483EIBZ-T is also Active and ROHS3 compliant. ISL8483EIBZ-T7A shares identical specifications but is classified as Obsolete.

For Cross-Manufacturer Substitution (Similar Parts):

ADM487EARZ and ADM487EARZ-REEL7 from Analog Devices provide functional equivalence with identical data rate and receiver hysteresis. Supply voltage range narrows to 4.75V – 5.25V, which remains compatible with the original 4.5V – 5.5V specification when operating within the overlapping 4.75V – 5.25V window. Both are Active and ROHS3 compliant.

MAX487CSA+, MAX487CSA+T, and MAX487ECSA+ from Analog Devices/Maxim Integrated maintain 250 kbps data rate and 70 mV hysteresis. Operating temperature range is restricted to 0°C – 70°C, which excludes the lower -40°C specification of the original part. These are suitable only for applications not requiring extended low-temperature operation.

MAX14780EESA+T offers enhanced data rate capability (20 Mbps) and tighter receiver hysteresis (50 mV), providing performance headroom for future-proofing. Supply voltage and operating temperature ranges match the original specification.

Compliance Consideration:

The ISL8487IB-T is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, supporting regulatory requirements for new product designs and manufacturing.

Frequently Asked Questions (FAQ)

Q: Can ISL81483IBZ-T directly replace ISL8487IB-T in existing designs?

A: Yes. ISL81483IBZ-T maintains identical electrical specifications: 250 kbps data rate, 70 mV receiver hysteresis, 4.5V – 5.5V supply voltage, -40°C to 85°C operating temperature, and 8-SOIC package. It is manufactured by Renesas and carries Active product status with ROHS3 compliance.

Q: What is the difference between ISL8483EIBZ-T and ISL8487EIBZ-T?

A: Both parts are parametric equivalents with identical electrical specifications and Active product status. The primary difference is the base product number (ISL8483 vs. ISL8487). Both are suitable for direct replacement of ISL8487IB-T.

Q: Can I use ADM487EARZ instead of ISL8487IB-T?

A: ADM487EARZ is functionally equivalent with matching data rate (250 kbps), receiver hysteresis (70 mV), and operating temperature range (-40°C to 85°C). The supply voltage range is narrower (4.75V – 5.25V vs. 4.5V – 5.5V). Substitution is valid if your power supply operates within the 4.75V – 5.25V window. ADM487EARZ is manufactured by Analog Devices and is Active with ROHS3 compliance.

Q: Why is MAX487CSA+ not recommended for all applications?

A: MAX487CSA+ restricts operating temperature to 0°C – 70°C, excluding the lower -40°C specification of ISL8487IB-T. Use this part only in applications with operating temperatures above 0°C. It is suitable for commercial and industrial environments within this temperature range.

Q: What advantage does MAX14780EESA+T offer?

A: MAX14780EESA+T provides enhanced data rate (20 Mbps vs. 250 kbps) and tighter receiver hysteresis (50 mV vs. 70 mV). Supply voltage (4.5V – 5.5V) and operating temperature (-40°C to 85°C) match the original specification. This part is suitable for applications requiring higher bandwidth or improved noise immunity.

Q: Are all substitute parts available in the same packaging options?

A: Packaging varies by part number. ISL8487IB-T is supplied in standard tube packaging. Renesas equivalents (ISL81483IBZ-T, ISL8483EIBZ-T, ISL8487EIBZ-T) are available in Tape & Reel or Cut Tape & Digi-Reel formats. Analog Devices parts (ADM487EARZ, ADM487EARZ-REEL7) are available in Tube or Cut Tape & Digi-Reel formats. Verify packaging compatibility with your procurement and assembly requirements.

Q: Is RoHS compliance mandatory for my application?

A: RoHS compliance is required for products sold in the European Union and many other regulated markets. All recommended substitutes are ROHS3 compliant, whereas ISL8487IB-T is non-compliant. For new designs or products subject to RoHS regulations, select from the compliant alternatives listed.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message