ISL41387IRZ Equivalent & Substitute Parts

Part Overview

The ISL41387IRZ is a 2/2 transceiver IC with full-duplex RS232, RS422, and RS485 protocol support, manufactured by Renesas Electronics Corporation. This device is packaged in a 40-QFN (6x6) surface mount configuration with an exposed pad. The ISL41387IRZ is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ISL41387IRZ

Renesas Electronics CorporationIn Stock: 1359ISL41387IRZ Datasheet

Current PartRFQ

ISL3331IRZ

Renesas Electronics CorporationIn Stock: 1186ISL3331IRZ Datasheet

MFR RecommendedRFQ

ISL41334IRZ

Renesas Electronics CorporationIn Stock: 1203ISL41334IRZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL41387IRZ is determined by strict equivalence across the following critical parameters:

• Protocol support (RS232, RS422, RS485)
• Driver/receiver configuration (2/2)
• Full-duplex operation
• Data rate (20 Mbps)
• Package type (40-VFQFN Exposed Pad)
• Operating temperature range (-40°C ~ 85°C)
• Receiver hysteresis (35 mV)
• RoHS3 compliance
• MSL rating (3, 168 Hours)

Two substitute parts meet these criteria with the following distinctions:

ISL3331IRZ — Manufacturer-recommended substitute with identical functional and electrical specifications except for supply voltage range (3.15V ~ 3.45V). Product status is active.

ISL41334IRZ — Parametric equivalent with identical specifications including supply voltage range (4.5V ~ 5.5V). Product status is active.

Parameter Comparison

Engineering Selection Recommendations

ISL41334IRZ is the direct parametric equivalent for applications requiring the ISL41387IRZ. This part maintains identical supply voltage specifications (4.5V ~ 5.5V) and all functional parameters while offering active product status from Renesas Electronics Corporation.

ISL3331IRZ is the manufacturer-recommended substitute and is suitable for applications where the lower supply voltage range (3.15V ~ 3.45V) is compatible with system design. This part also carries active product status.

Both substitute parts are ROHS3 compliant and carry identical MSL ratings, package configurations, and thermal operating ranges as the original ISL41387IRZ.

Frequently Asked Questions (FAQ)

Q: Can ISL3331IRZ replace ISL41387IRZ in existing designs?

A: ISL3331IRZ is the manufacturer-recommended substitute. Functional compatibility is confirmed across protocol support, driver/receiver configuration, data rate, and package type. The primary design consideration is the supply voltage range: ISL3331IRZ operates at 3.15V ~ 3.45V versus the ISL41387IRZ at 4.5V ~ 5.5V. System power supply specifications must accommodate this difference.

Q: What is the difference between ISL3331IRZ and ISL41334IRZ?

A: Both parts are functionally equivalent to the ISL41387IRZ. ISL41334IRZ maintains the identical 4.5V ~ 5.5V supply voltage range as the original part. ISL3331IRZ operates at a lower voltage range (3.15V ~ 3.45V) and is designated as the manufacturer-recommended substitute. Selection depends on system voltage requirements.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 40-VFQFN Exposed Pad package configuration with identical pinout and mechanical dimensions.

Q: What compliance certifications apply to substitute parts?

A: Both ISL3331IRZ and ISL41334IRZ are ROHS3 compliant with MSL rating 3 (168 Hours), matching the original ISL41387IRZ specifications.

Q: Why is ISL41387IRZ classified as obsolete?

A: The ISL41387IRZ has been discontinued by Renesas Electronics Corporation. ISL3331IRZ and ISL41334IRZ are active products that provide equivalent functionality for new designs and legacy system support.