ISL32485EIBZ Equivalent & Substitute Parts

Part Overview

The ISL32485EIBZ is a half-duplex RS422/RS485 transceiver IC manufactured by Renesas Electronics Corporation. This interface component operates at 1 Mbps data rate with a 4.5V to 5.5V supply voltage range and is housed in an 8-SOIC surface mount package. The device is actively produced and ROHS3 compliant, making it suitable for industrial communication applications requiring reliable half-duplex serial transmission. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	ISL32485EIBZ
Manufacturer	Renesas Electronics Corporation
Protocol	RS422, RS485
Type	Transceiver Half Duplex
Number of Drivers/Receivers	1/1
Data Rate	1 Mbps
Receiver Hysteresis	25 mV
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the ISL32485EIBZ are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: RS422/RS485 protocol support, 1/1 driver/receiver configuration, half-duplex operation, 25 mV receiver hysteresis, 1 Mbps data rate, 4.5V to 5.5V supply voltage, -40°C to 85°C operating temperature range, and 8-SOIC package format. These parts are direct functional replacements with no design modifications required.

Similar Parts share the same package format (8-SOIC), protocol support (RS422/RS485), and half-duplex transceiver architecture but differ in one or more electrical parameters including supply voltage range, operating temperature range, data rate, or receiver hysteresis. These parts require design review to confirm compatibility with system requirements before substitution.

Parameter Comparison

Part Number	Manufacturer	Classification	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Inventory (Pcs)
ISL32485EIBZ	Renesas	Main Part	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	21,258
ISL31475EIBZ	Renesas	Parametric Equivalent	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	15,972
ISL32495EIBZ	Renesas	Parametric Equivalent	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	25 mV	8-SOIC	1,515
SP3485CN-L	MaxLinear	Similar Part	10 Mbps	3V ~ 3.6V	0°C ~ 70°C	20 mV	8-SOIC	24,740
SP3485CN-L/TR	MaxLinear	Similar Part	10 Mbps	3V ~ 3.6V	0°C ~ 70°C	20 mV	8-SOIC	15,300
SP3485EN-L	MaxLinear	Similar Part	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	20 mV	8-SOIC	33,600
SP3485EN-L/TR	MaxLinear	Similar Part	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	20 mV	8-SOIC	285,300
SP3494EN-L	MaxLinear	Similar Part	2.5 Mbps	3V ~ 3.6V	-40°C ~ 85°C	20 mV	8-SOIC	1,175
SP483EEN-L/TR	MaxLinear	Similar Part	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	8-SOIC	35,400
SP485CN-L	MaxLinear	Similar Part	5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	10 mV	8-SOIC	1,295
SP485CN-L/TR	MaxLinear	Similar Part	5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	10 mV	8-SOIC	19,222

Engineering Selection Recommendations

Direct Substitution (No Design Changes Required):

ISL31475EIBZ and ISL32495EIBZ are parametric equivalents to ISL32485EIBZ. Both devices are manufactured by Renesas Electronics Corporation, maintain identical electrical specifications, and are ROHS3 compliant with active product status. These parts can be substituted without circuit modification or re-qualification.

Conditional Substitution (Design Review Required):

MaxLinear SP3485 and SP3494 series parts operate at lower supply voltages (3V to 3.6V) compared to the ISL32485EIBZ (4.5V to 5.5V). SP3485EN-L and SP3485EN-L/TR support the full -40°C to 85°C temperature range and offer higher data rates (10 Mbps), making them suitable for applications where extended temperature operation and increased bandwidth are required, provided the 3V to 3.6V supply voltage is available in the system design.

SP483EEN-L/TR operates at 4.75V to 5.25V supply voltage, overlapping with the ISL32485EIBZ range, and supports the full -40°C to 85°C temperature range. However, its 250 kbps data rate is significantly lower than the 1 Mbps specification of the main part, limiting its use to low-speed communication applications.

SP485CN-L and SP485CN-L/TR operate at 4.75V to 5.25V supply voltage but are restricted to 0°C to 70°C operating temperature, making them unsuitable for applications requiring extended low-temperature operation below 0°C.

All substitute parts maintain ROHS3 compliance and active product status, supporting long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can ISL31475EIBZ or ISL32495EIBZ be used as direct replacements for ISL32485EIBZ?

A: Yes. Both ISL31475EIBZ and ISL32495EIBZ are parametric equivalents with identical electrical specifications, including 1 Mbps data rate, 4.5V to 5.5V supply voltage, -40°C to 85°C operating temperature, and 25 mV receiver hysteresis. No circuit modifications are required.

Q: What are the key differences between ISL32485EIBZ and MaxLinear SP3485 series parts?

A: The primary differences are supply voltage and data rate. ISL32485EIBZ operates at 4.5V to 5.5V with 1 Mbps data rate, while SP3485 series parts operate at 3V to 3.6V with 10 Mbps data rate. SP3485EN-L and SP3485EN-L/TR support the full -40°C to 85°C temperature range, whereas SP3485CN-L and SP3485CN-L/TR are limited to 0°C to 70°C.

Q: Is SP483EEN-L/TR compatible with ISL32485EIBZ applications?

A: SP483EEN-L/TR shares the same 8-SOIC package and supports the full -40°C to 85°C temperature range with 4.75V to 5.25V supply voltage. However, its 250 kbps data rate is significantly lower than the 1 Mbps specification of ISL32485EIBZ. Substitution is only appropriate for low-speed communication systems.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in 8-SOIC surface mount package format, matching the ISL32485EIBZ package specification. MaxLinear parts are offered in both Tube packaging and Cut Tape (CT) & Digi-Reel® packaging options, providing flexibility for different procurement and assembly workflows.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ISL31475EIBZ, ISL32495EIBZ, and all MaxLinear substitute parts listed are ROHS3 compliant, ensuring compliance with environmental and hazardous substance regulations.

Q: Which substitute part offers the highest inventory availability?

A: SP3485EN-L/TR has the highest inventory level at 285,300 pieces, followed by SP3485EN-L at 33,600 pieces. These parts are suitable for applications where supply volume and extended temperature operation (-40°C to 85°C) are critical, provided the 3V to 3.6V supply voltage requirement is met.

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