ISL31485EIBZ Equivalent & Substitute Parts

Part Overview

The ISL31485EIBZ is a half-duplex RS422/RS485 transceiver IC manufactured by Renesas Electronics Corporation 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 device operates within a 4.5V to 5.5V supply range with a 1 Mbps data rate and supports industrial temperature ranges from -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISL31485EIBZ
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	25 mV
Data Rate	1 Mbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the ISL31485EIBZ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Protocol: RS422/RS485 half-duplex operation
Number of Drivers/Receivers: 1/1 configuration
Package: 8-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Receiver Hysteresis: 25 mV tolerance
Data Rate: 1 Mbps minimum
Voltage Supply: 4.5V ~ 5.5V range
Operating Temperature: -40°C ~ 85°C range

Parametric equivalents maintain all electrical specifications and operating conditions identical to the main part. Similar parts may have variations in data rate, supply voltage, or operating temperature but retain the same protocol, duplex configuration, driver/receiver count, and package type.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
ISL31485EIBZ	Renesas	RS422, RS485	1/1	Half	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete	ROHS3
ISL31475EIBZ	Renesas	RS422, RS485	1/1	Half	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	ROHS3
ISL32475EIBZ	Renesas	RS422, RS485	1/1	Half	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	ROHS3
ISL32485EIBZ	Renesas	RS422, RS485	1/1	Half	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	ROHS3
ISL32495EIBZ	Renesas	RS422, RS485	1/1	Half	1 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	ROHS3
SP1485ECN-L/TR	MaxLinear	RS422, RS485	1/1	Half	20 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	Active	RoHS
SP1485EEN-L/TR	MaxLinear	RS422, RS485	1/1	Half	20 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	Active	RoHS
SP3485CN-L	MaxLinear	RS422, RS485	1/1	Half	10 Mbps	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Active	ROHS3
SP3485CN-L/TR	MaxLinear	RS422, RS485	1/1	Half	10 Mbps	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Active	RoHS
SP3485EN-L	MaxLinear	RS422, RS485	1/1	Half	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3
SP3485EN-L/TR	MaxLinear	RS422, RS485	1/1	Half	10 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	ROHS3

Engineering Selection Recommendations

Parametric Equivalents (Renesas ISL Series): ISL31475EIBZ, ISL32475EIBZ, ISL32485EIBZ, and ISL32495EIBZ are parametric equivalents with active product status. These parts maintain identical electrical specifications and operating conditions to the obsolete ISL31485EIBZ. All are ROHS3 compliant and suitable for direct replacement in existing designs without circuit modification.

Similar Parts with Operating Condition Variations: SP1485EEN-L/TR (MaxLinear) maintains the full -40°C to 85°C operating temperature range with identical supply voltage specifications but offers enhanced data rate capability at 20 Mbps. This part is RoHS compliant and active in production.

SP3485EN-L and SP3485EN-L/TR (MaxLinear) operate across the full industrial temperature range (-40°C to 85°C) and are ROHS3 compliant. These parts operate at 3V to 3.6V supply voltage with 10 Mbps data rate, requiring circuit design consideration for voltage compatibility.

Limited Operating Range Alternatives: SP1485ECN-L/TR and SP3485CN-L variants operate within restricted temperature ranges (0°C to 70°C) and are suitable only for applications not requiring full industrial temperature coverage.

Frequently Asked Questions (FAQ)

Q: Can ISL31475EIBZ directly replace ISL31485EIBZ? A: Yes. ISL31475EIBZ is a parametric equivalent with identical electrical specifications, operating temperature range, supply voltage, and package configuration. The primary difference is active product status versus obsolete status.

Q: What is the key difference between Renesas ISL and MaxLinear SP series substitutes? A: Renesas ISL parametric equivalents maintain 4.5V to 5.5V supply voltage operation. MaxLinear SP1485 series operates at 4.75V to 5.25V with higher data rates (20 Mbps). MaxLinear SP3485 series operates at 3V to 3.6V supply voltage, requiring circuit redesign for voltage compatibility.

Q: Are SP3485EN-L and SP3485EN-L/TR interchangeable? A: Both parts are electrically identical. The difference is packaging: SP3485EN-L is supplied in tube packaging, while SP3485EN-L/TR is supplied in cut tape and digi-reel format. Selection depends on procurement and assembly requirements.

Q: Can SP1485ECN-L/TR be used in applications requiring -40°C operation? A: No. SP1485ECN-L/TR operates only from 0°C to 70°C. For full industrial temperature range (-40°C to 85°C), use SP1485EEN-L/TR or Renesas ISL series equivalents.

Q: What supply voltage considerations apply when selecting SP3485 variants? A: SP3485 series operates at 3V to 3.6V, differing from the ISL31485EIBZ specification of 4.5V to 5.5V. Circuit redesign is required to accommodate this lower voltage range. Renesas ISL series maintains the original 4.5V to 5.5V specification for direct substitution without circuit modification.

Q: Are all listed substitutes ROHS3 compliant? A: Renesas ISL series parts and MaxLinear SP3485 variants are ROHS3 compliant. MaxLinear SP1485 series is RoHS compliant. Verify compliance requirements for your specific application.

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