ISL43240IRZ Equivalent & Substitute Parts

Part Overview

The ISL43240IRZ is a 4-circuit SPDT analog switch manufactured by Renesas Electronics Corporation, designed for signal routing and multiplexing applications. This device features a 25Ohm on-state resistance and operates across a wide supply voltage range of 2.7V to 12V (single supply) or ±2V to 6V (dual supply). The ISL43240IRZ is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

ISL43240IRZ

Renesas Electronics CorporationIn Stock: 1113ISL43240IRZ Datasheet

Current PartRFQ

ISL43240IAZ

Renesas Electronics CorporationIn Stock: 2359ISL43240IAZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL43240IRZ is determined by strict equivalence across the following critical parameters:

• Switch Circuit Configuration: Must be SPDT
• Multiplexer/Demultiplexer Circuit: Must be 2:1
• Number of Circuits: Must be 4
• On-State Resistance (Max): Must be 25Ohm
• Channel-to-Channel Matching (ΔRon): Must be 500mOhm
• Supply Voltage Range: Single supply 2.7V ~ 12V and dual supply ±2V ~ 6V
• Switch Time: Ton (Max) 65ns, Toff (Max) 50ns
• Charge Injection (Max): 5pC
• Channel Capacitance: CS(off) and CD(off) both 10pF
• Current - Leakage (IS(off)) (Max): 200pA
• Crosstalk: -92dB @ 1MHz
• Operating Temperature: -40°C ~ 85°C
• Compliance: ROHS3 Compliant, MSL 3

The ISL43240IAZ meets all these criteria and is identified as the manufacturer-recommended substitute. Package differences (20-VFQFN versus 20-SSOP) represent the primary distinction between these parts.

Parameter Comparison

Engineering Selection Recommendations

The ISL43240IAZ is the direct functional equivalent of the ISL43240IRZ. Both devices are obsolete products from Renesas Electronics Corporation with identical electrical specifications and compliance certifications. Selection between these parts is determined solely by package requirements: the ISL43240IRZ uses a 20-VFQFN Exposed Pad package, while the ISL43240IAZ uses a 20-SSOP package.

Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring equivalent environmental and regulatory suitability. The choice between these substitutes depends on PCB layout constraints and assembly process compatibility with either QFN or SSOP package formats.

Frequently Asked Questions (FAQ)

Q: Can the ISL43240IAZ replace the ISL43240IRZ in existing designs?

A: The ISL43240IAZ is electrically equivalent to the ISL43240IRZ across all specified parameters. Substitution is feasible only if the PCB layout and assembly process accommodate the 20-SSOP package footprint in place of the 20-VFQFN Exposed Pad package.

Q: What is the primary difference between these two parts?

A: The ISL43240IRZ is packaged in 20-VFQFN Exposed Pad format, while the ISL43240IAZ uses 20-SSOP format. All electrical characteristics, supply voltage ranges, switching performance, and compliance certifications are identical.

Q: Are there any thermal or performance differences between the QFN and SSOP packages?

A: The provided specifications do not include thermal performance data. Package selection should be based on PCB layout requirements, assembly capabilities, and thermal management needs specific to the application.

Q: Do both parts have the same moisture sensitivity requirements?

A: Both the ISL43240IRZ and ISL43240IAZ carry MSL 3 ratings with a 168-hour floor life. Identical moisture handling and storage protocols apply to both parts.

Q: Are both parts suitable for the same supply voltage applications?

A: Both parts operate identically across single supply (2.7V ~ 12V) and dual supply (±2V ~ 6V) configurations. No voltage-related restrictions apply to substitution.