ISL3175EIUZ Equivalent & Substitute Parts

Part Overview

The ISL3175EIUZ is a half-duplex RS422/RS485 transceiver IC manufactured by Renesas Electronics Corporation in an 8-MSOP surface mount package. This component is actively produced and widely used in industrial communication systems requiring reliable serial data transmission over twisted-pair cabling. Substitute parts become necessary when the primary part experiences supply constraints, end-of-life transitions, or when design requirements demand alternative performance characteristics such as extended temperature ranges or higher data rates.

Key Parameters

Parameter	ISL3175EIUZ
Manufacturer	Renesas Electronics Corporation
Product Status	Active
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	15 mV
Data Rate	500 kbps
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the ISL3175EIUZ is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Protocol: RS422/RS485
Number of Drivers/Receivers: 1/1 configuration
Duplex Mode: Half-duplex operation
Package Type: 8-MSOP surface mount
Supply Voltage Range: 3V ~ 3.6V
RoHS Compliance: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1

Allowable Variation Parameters:

Receiver Hysteresis: 15 mV (ISL3175EIUZ) to 25 mV (LTC2850 series)
Data Rate: 500 kbps (ISL3175EIUZ) to 20 Mbps (LTC2850 series)
Operating Temperature Range: May extend beyond the original specification
Product Status: Active or Obsolete (if functionally equivalent)

The ISL83075EIUZA qualifies as a parametric equivalent despite obsolete status, as all mandatory parameters align. The LTC2850 series variants (manufactured by Analog Devices Inc.) qualify as similar substitutes with enhanced performance characteristics, including higher data rates and extended temperature ranges, while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Inventory (Pcs)
ISL3175EIUZ	Renesas Electronics	Active	RS422, RS485	1/1	Half	15 mV	500 kbps	3V ~ 3.6V	-40°C ~ 85°C	8-MSOP	1415
ISL83075EIUZA	Renesas Electronics	Obsolete	RS422, RS485	1/1	Half	15 mV	500 kbps	3V ~ 3.6V	-40°C ~ 85°C	8-MSOP	2100
LTC2850CMS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	25 mV	20 Mbps	3V ~ 3.6V	0°C ~ 70°C	8-MSOP	3600
LTC2850HMS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	25 mV	20 Mbps	3V ~ 3.6V	-40°C ~ 125°C	8-MSOP	3700
LTC2850IMS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	25 mV	20 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-MSOP	1650
LTC2850IMS8#TRPBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	25 mV	20 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-MSOP	5685
LTC2850MPMS8#PBF	Analog Devices Inc.	Active	RS422, RS485	1/1	Half	25 mV	20 Mbps	3V ~ 3.6V	-55°C ~ 125°C	8-MSOP	50200

Engineering Selection Recommendations

Parametric Equivalent (Renesas Electronics): ISL83075EIUZA provides identical electrical and mechanical specifications to the ISL3175EIUZ. Despite obsolete product status, this part maintains full compatibility and is suitable for applications where existing inventory or legacy system requirements necessitate Renesas-sourced components. ROHS3 compliance and MSL 1 rating are maintained.

Active Substitutes (Analog Devices Inc. LTC2850 Series): The LTC2850 family offers superior performance characteristics while maintaining full pin and package compatibility. All variants are actively produced and ROHS3 compliant. Selection among LTC2850 variants depends on application temperature requirements:

LTC2850CMS8#PBF: Suitable for commercial temperature range applications (0°C ~ 70°C). Highest inventory availability among standard variants.
LTC2850HMS8#PBF: Extends operating range to -40°C ~ 125°C, accommodating industrial and extended-temperature applications.
LTC2850IMS8#PBF and LTC2850IMS8#TRPBF: Industrial grade with -40°C ~ 85°C range. TRPBF variant offers cut tape and Digi-Reel packaging with 5685 units in stock.
LTC2850MPMS8#PBF: Military-grade temperature range (-55°C ~ 125°C) with highest inventory (50200 units). Recommended for applications requiring extended thermal performance and maximum supply assurance.

All LTC2850 variants support 20 Mbps data rates, providing 40x performance improvement over the ISL3175EIUZ baseline specification while maintaining backward compatibility in half-duplex RS422/RS485 applications.

Frequently Asked Questions (FAQ)

Q: Can LTC2850 series parts directly replace ISL3175EIUZ without PCB modifications? A: Yes. All LTC2850 variants share identical 8-MSOP pinout and supply voltage requirements (3V ~ 3.6V). No PCB layout changes are required. Pin-for-pin compatibility is guaranteed.

Q: What is the significance of the 25 mV receiver hysteresis in LTC2850 parts versus 15 mV in ISL3175EIUZ? A: Receiver hysteresis determines the voltage differential required to switch receiver output states. The 25 mV specification in LTC2850 parts provides improved noise immunity in electrically noisy environments while maintaining full RS422/RS485 standard compliance. This represents an enhancement rather than a limitation.

Q: Which LTC2850 variant should be selected for industrial applications with temperature extremes? A: LTC2850HMS8#PBF (-40°C ~ 125°C) is recommended for standard industrial applications. LTC2850MPMS8#PBF (-55°C ~ 125°C) is specified for military-grade or extended-range thermal requirements. Both maintain identical electrical performance.

Q: Is ISL83075EIUZA suitable for new designs despite obsolete status? A: ISL83075EIUZA is electrically and mechanically equivalent to ISL3175EIUZ but carries obsolete product status. Use is restricted to legacy system maintenance or applications where existing inventory must be consumed. For new designs, active LTC2850 variants are recommended to ensure long-term supply continuity.

Q: What packaging options are available among substitute parts? A: ISL3175EIUZ, ISL83075EIUZA, and most LTC2850 variants are supplied in tube packaging. LTC2850IMS8#TRPBF is available in cut tape and Digi-Reel format, offering flexibility for automated assembly processes. All maintain identical 8-MSOP case dimensions.

Q: Are all substitute parts ROHS3 compliant? A: Yes. ISL3175EIUZ, ISL83075EIUZA, and all LTC2850 variants listed carry ROHS3 compliance certification. REACH status is unaffected across all parts.

Q: What is the data rate advantage of LTC2850 parts in practical applications? A: LTC2850 series supports 20 Mbps versus 500 kbps for ISL3175EIUZ. This 40x improvement enables higher-speed serial communication protocols and reduces transmission latency in bandwidth-sensitive applications, while remaining fully backward compatible with lower-speed legacy systems.

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