ISL4245EIR-T RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ISL4245EIR-T is a full-duplex RS232 transceiver manufactured by Renesas Electronics Corporation, configured with 3 drivers and 5 receivers in a 32-QFN (5x5) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device operates across a 2.7V to 5.5V supply range with a 1Mbps data rate and is rated for -40°C to 85°C operating temperatures.

Substiute Parts

ISL4245EIR-T

Renesas Electronics CorporationIn Stock: 798ISL4245EIR-T Datasheet

Current PartRFQ

ISL4245EIRZ-T

Renesas Electronics CorporationIn Stock: 3599ISL4245EIRZ-T Datasheet

Parametric EquivalentRFQ

TRS3243ECRHBR

Texas InstrumentsIn Stock: 2650TRS3243ECRHBR Datasheet

SimilarRFQ

TRS3243EIRHBR

Texas InstrumentsIn Stock: 2127TRS3243EIRHBR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ISL4245EIR-T is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• RS232 protocol compliance
• 3 driver / 5 receiver configuration
• Full-duplex operation
• 32-pin QFN package with exposed pad
• 500 mV receiver hysteresis
• Surface mount technology

Parametric Equivalent: ISL4245EIRZ-T matches all electrical and mechanical specifications of the main part while offering active product status and improved RoHS compliance.

Similar Substitutes: TRS3243ECRHBR and TRS3243EIRHBR are Texas Instruments alternatives that maintain the same driver/receiver count, protocol, package footprint, and hysteresis specification. These parts differ in data rate (500kbps vs. 1Mbps), supply voltage range (3V ~ 5.5V vs. 2.7V ~ 5.5V), and operating temperature ranges, requiring design verification for specific applications.

Parameter Comparison

Engineering Selection Recommendations

ISL4245EIRZ-T is the direct parametric equivalent and primary substitute. It maintains identical electrical specifications and package footprint while offering active product status and ROHS3 compliance, eliminating the regulatory constraints of the obsolete ISL4245EIR-T.

TRS3243EIRHBR is suitable as a secondary substitute when supply constraints require cross-manufacturer sourcing. It preserves the full -40°C to 85°C operating temperature range and maintains all critical interface parameters. The reduced data rate (500kbps vs. 1Mbps) and narrower supply voltage floor (3V vs. 2.7V) must be evaluated against application requirements.

TRS3243ECRHBR is limited to applications with 0°C to 70°C operating temperature requirements and should not be selected for designs requiring the full -40°C to 85°C range of the original part.

All substitute options provide ROHS3 compliance and improved moisture sensitivity ratings, supporting modern supply chain and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can ISL4245EIRZ-T be used as a direct drop-in replacement for ISL4245EIR-T?

A: Yes. ISL4245EIRZ-T is a parametric equivalent with identical electrical specifications, package footprint, and pin configuration. The only differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No design modifications are required.

Q: What are the key differences between Renesas and Texas Instruments substitutes?

A: ISL4245EIRZ-T maintains 1Mbps data rate and 2.7V minimum supply voltage. TRS3243 variants operate at 500kbps and require 3V minimum supply. Both maintain 3/5 driver/receiver configuration, 500 mV hysteresis, and identical package footprint. Verify application data rate and supply voltage requirements before selection.

Q: Is TRS3243ECRHBR suitable for industrial temperature range applications?

A: No. TRS3243ECRHBR is rated only 0°C to 70°C. For applications requiring -40°C to 85°C operation, use ISL4245EIRZ-T or TRS3243EIRHBR.

Q: Do all substitutes use the same 32-QFN package?

A: Yes. All listed parts use 32-VFQFN Exposed Pad packages with identical 5x5mm footprints and pin assignments, ensuring PCB layout compatibility.

Q: What is the impact of the reduced data rate in TRS3243 parts?

A: TRS3243 variants support 500kbps maximum data rate versus 1Mbps for ISL4245 parts. Applications operating below 500kbps are unaffected. High-speed serial communication designs must retain ISL4245EIRZ-T or verify TRS3243 performance at intended baud rates.

Q: Are all substitutes RoHS compliant?

A: ISL4245EIRZ-T, TRS3243ECRHBR, and TRS3243EIRHBR are all ROHS3 compliant. The original ISL4245EIR-T is RoHS non-compliant. Designs subject to RoHS requirements must use one of the compliant substitutes.