ISL83491IP Equivalent & Substitute Parts

Part Overview

The ISL83491IP is a 1/1 transceiver IC for RS422 and RS485 communication protocols, manufactured by Renesas Electronics Corporation. This full-duplex interface component is packaged in a 14-pin DIP configuration for through-hole mounting. The part is currently classified as obsolete, making identification of suitable equivalent and substitute parts essential for ongoing system support, redesigns, and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts may differ in packaging or compliance status while preserving core functional parameters.

Substiute Parts

ISL83491IP

Renesas Electronics CorporationIn Stock: 6982ISL83491IP Datasheet

Current PartRFQ

ISL83491IBZ

Renesas Electronics CorporationIn Stock: 7124ISL83491IBZ Datasheet

DirectRFQ

MAX3491CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1008MAX3491CPD+ Datasheet

SimilarRFQ

MAX3491EPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3285MAX3491EPD+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISL83491IP is determined by the following core parameters: transceiver type, RS422/RS485 protocol support, 1/1 driver/receiver configuration, full-duplex operation, 50 mV receiver hysteresis, 10 Mbps data rate, 3V–3.6V supply voltage range, and operating temperature range. Parts meeting these specifications are classified as functionally equivalent regardless of packaging format or manufacturing source.

The substitute parts identified are grouped as follows:

Direct Manufacturer Equivalent (ISL83491IBZ): Identical electrical specifications and base product number from the same manufacturer. Differs only in mounting type (surface mount SOIC package) and product status (active vs. obsolete).

Similar Manufacturer Parts (MAX3491CPD+, MAX3491EPD+): Manufactured by Analog Devices Inc./Maxim Integrated. Both maintain all core electrical parameters and protocol specifications. MAX3491CPD+ operates at 0°C–70°C; MAX3491EPD+ operates at -40°C–85°C, matching the original temperature range. Both use through-hole DIP packaging identical to the ISL83491IP.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole DIP Mounting Applications:

MAX3491EPD+ is the primary recommendation. It maintains identical package format (14-DIP), operating temperature range (-40°C to 85°C), and all electrical specifications of the ISL83491IP. The part is active in production and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

MAX3491CPD+ is functionally equivalent but operates within a narrower temperature range (0°C to 70°C). Selection of this part is appropriate only when the application environment does not require the extended low-temperature performance of the ISL83491IP.

For Surface-Mount Applications:

ISL83491IBZ provides direct manufacturer equivalence with identical electrical specifications and operating temperature range. The 14-SOIC package enables surface-mount assembly while maintaining functional compatibility. This part is active in production and ROHS3 compliant.

Compliance Considerations:

All substitute parts are ROHS3 compliant, whereas the ISL83491IP is non-compliant. This distinction is relevant for applications subject to RoHS regulations. All parts maintain REACH unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can ISL83491IBZ be used as a direct replacement for ISL83491IP?

A: ISL83491IBZ is electrically and functionally equivalent to ISL83491IP. The primary difference is packaging: ISL83491IBZ uses 14-SOIC surface-mount format, while ISL83491IP uses 14-DIP through-hole format. Direct PCB substitution without layout modification is not possible. However, both parts are from the same manufacturer (Renesas) and share identical base product specifications.

Q: What is the temperature range difference between MAX3491CPD+ and MAX3491EPD+?

A: MAX3491CPD+ operates from 0°C to 70°C, while MAX3491EPD+ operates from -40°C to 85°C. The ISL83491IP operates at -40°C to 85°C. If your application requires operation below 0°C or above 70°C, MAX3491EPD+ is the appropriate selection. For applications within the 0°C to 70°C range, both parts are functionally suitable.

Q: Are all substitute parts RoHS compliant?

A: Yes. ISL83491IBZ, MAX3491CPD+, and MAX3491EPD+ are all ROHS3 compliant. The original ISL83491IP is RoHS non-compliant. This distinction is significant for new designs or applications subject to RoHS regulations.

Q: Can I use a MAX3491 part in place of an ISL83491 in an existing design?

A: Yes, provided the package format is compatible with your PCB layout. MAX3491CPD+ and MAX3491EPD+ both use 14-DIP packaging identical to ISL83491IP, enabling direct socket substitution. All electrical parameters, protocol support, and functional specifications are equivalent. Verify that your application's operating temperature requirements align with the selected MAX3491 variant.

Q: What is the inventory status of these parts?

A: ISL83491IP (obsolete) has 6,956 units in stock. ISL83491IBZ (active) has 7,027 units. MAX3491CPD+ (active) has 970 units. MAX3491EPD+ (active) has 3,198 units. For long-term production requirements, active-status parts are recommended.