ISL83088EIB Equivalent & Substitute Parts

Part Overview

The ISL83088EIB is a half-duplex RS422/RS485 transceiver IC manufactured by Renesas Electronics Corporation in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The ISL83088EIB operates across industrial temperature ranges (-40°C to 85°C) with a 10 Mbps data rate and 4.5V to 5.5V supply voltage specification.

Key Parameters

Parameter	ISL83088EIB Specification
Manufacturer	Renesas Electronics Corporation
Type	Transceiver
Protocol	RS422, RS485
Duplex Configuration	Half
Number of Drivers/Receivers	1/1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Data Rate	10 Mbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Receiver Hysteresis	20 mV
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the ISL83088EIB is determined by strict equivalence across the following critical parameters:

Protocol compatibility: RS422/RS485 half-duplex operation
Package compatibility: 8-SOIC surface mount form factor
Electrical specifications: Supply voltage range, data rate capability, operating temperature range
Functional configuration: 1 driver and 1 receiver per device

The ISL83088EIBZ represents a parametric equivalent with identical electrical specifications but improved product status (Active) and RoHS3 compliance. The MAX series devices (MAX3088 and MAX14780 variants) function as similar alternatives with compatible pinouts and protocols but exhibit variations in receiver hysteresis, supply voltage tolerance, and operating temperature ranges that must be evaluated for specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	RoHS Status	Packaging
ISL83088EIB	Renesas	Obsolete	RS422/RS485	10 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	20 mV	Non-compliant	8-SOIC
ISL83088EIBZ	Renesas	Active	RS422/RS485	10 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	20 mV	RoHS3 Compliant	8-SOIC
MAX14780EESA+T	Analog Devices/Maxim	Active	RS422/RS485	20 Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	50 mV	RoHS3 Compliant	8-SOIC
MAX3088CSA+	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088CSA+T	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088ECSA+	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088ECSA+T	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088EESA+	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088EESA+T	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088ESA+	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	100 mV	RoHS3 Compliant	8-SOIC
MAX3088ESA+T	Analog Devices/Maxim	Active	RS422/RS485	10 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	100 mV	RoHS3 Compliant	8-SOIC

Engineering Selection Recommendations

Primary Recommendation: ISL83088EIBZ

The ISL83088EIBZ is the direct parametric equivalent to the ISL83088EIB with identical electrical specifications and pinout. This part maintains the original 20 mV receiver hysteresis, 10 Mbps data rate, and full -40°C to 85°C operating temperature range. The ISL83088EIBZ carries Active product status and RoHS3 compliance, eliminating obsolescence concerns while preserving design compatibility.

Secondary Recommendation: MAX3088EESA+ or MAX3088EESA+T

The MAX3088EESA+ variants provide functional equivalence with Active product status and RoHS3 compliance. These parts maintain the -40°C to 85°C operating temperature range matching the original specification. The supply voltage tolerance narrows to 4.75V to 5.25V, and receiver hysteresis increases to 100 mV. These differences are acceptable for applications where the tighter hysteresis specification does not create signal integrity issues.

Alternative Consideration: MAX14780EESA+T

The MAX14780EESA+T offers enhanced performance with 20 Mbps data rate capability and maintains the full -40°C to 85°C temperature range. This part is suitable for applications requiring higher bandwidth while maintaining industrial temperature operation. The 50 mV receiver hysteresis and 4.5V to 5.5V supply voltage range closely align with the original ISL83088EIB specifications.

Not Recommended for Direct Substitution: MAX3088CSA+, MAX3088CSA+T, MAX3088ECSA+, MAX3088ECSA+T

These MAX3088 variants operate only across 0°C to 70°C temperature range, which does not meet the industrial temperature requirement of -40°C to 85°C specified for the ISL83088EIB. Use these parts only in applications with restricted operating temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ISL83088EIB with ISL83088EIBZ?

A: Yes. The ISL83088EIBZ is a parametric equivalent with identical electrical specifications, pinout, and package. The only differences are improved product status (Active vs. Obsolete) and RoHS3 compliance. No design changes are required.

Q: What is the key difference between ISL83088EIB and MAX3088EESA+?

A: Both devices operate across -40°C to 85°C and support RS422/RS485 half-duplex communication at 10 Mbps. The ISL83088EIB specifies 20 mV receiver hysteresis and 4.5V to 5.5V supply voltage, while the MAX3088EESA+ specifies 100 mV hysteresis and 4.75V to 5.25V supply voltage. The tighter hysteresis in the ISL83088EIB may provide better noise immunity in marginal signal conditions.

Q: Why do some MAX3088 variants show 0°C to 70°C operating temperature?

A: The MAX3088CSA+, MAX3088CSA+T, MAX3088ECSA+, and MAX3088ECSA+T variants are rated for commercial temperature range only. These parts are not suitable for industrial applications requiring -40°C to 85°C operation. Select MAX3088EESA+ or MAX3088EESA+T variants for full industrial temperature range compatibility.

Q: What is the difference between packaging options like CSA+, ECSA+, and EESA+?

A: The letter designations indicate temperature grade and internal configuration. The "E" prefix denotes extended temperature range (-40°C to 85°C). The "CSA+" and "ECSA+" variants operate at 0°C to 70°C, while "EESA+" variants operate at -40°C to 85°C. For ISL83088EIB replacement, use EESA+ variants to maintain industrial temperature specifications.

Q: Can I use MAX14780EESA+T instead of ISL83088EIB?

A: Yes, with consideration for the enhanced 20 Mbps data rate capability. The MAX14780EESA+T maintains -40°C to 85°C operation and 4.5V to 5.5V supply voltage compatibility. The 50 mV receiver hysteresis is intermediate between the ISL83088EIB (20 mV) and standard MAX3088 (100 mV) variants. This part is suitable for applications where higher bandwidth is beneficial or neutral.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance. The original ISL83088EIB is RoHS non-compliant. If RoHS compliance is a design requirement, select any of the substitute parts provided.

Q: What packaging options are available for these parts?

A: All parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package. Packaging format options include Tube, Cut Tape (CT) & Digi-Reel®, and standard reels. These format differences do not affect electrical performance or pinout compatibility.

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