ISL84543CBZ Equivalent & Substitute Parts

Part Overview

The ISL84543CBZ is a 2-circuit IC switch manufactured by Renesas Electronics Corporation, configured as SPST NO/NC with 60Ohm on-state resistance in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The ISL84543CBZ operates across a 2.7V to 12V supply range with switching times of 100ns (Ton) and 75ns (Toff), suitable for precision analog switching applications requiring low on-state resistance and minimal crosstalk.

Substiute Parts

ISL84543CBZ

Renesas Electronics CorporationIn Stock: 6596ISL84543CBZ Datasheet

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MAX325CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1365MAX325CSA+ Datasheet

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MAX325CSA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4341MAX325CSA+T Datasheet

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MAX325ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2108MAX325ESA+ Datasheet

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MAX325ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2061MAX325ESA+T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL84543CBZ is determined by strict electrical and mechanical compatibility across the following critical parameters:

Core Substitution Criteria:

• Switch circuit configuration: SPST - NO/NC (mandatory match)
• Number of circuits: 2 (mandatory match)
• Multiplexer/Demultiplexer circuit: 1:1 (mandatory match)
• On-state resistance: 60Ohm maximum (mandatory match)
• Package type: 8-SOIC surface mount (mandatory match)
• Physical dimensions: 0.154" × 3.90mm width (mandatory match)

Allowable Parameter Variations:

• Supply voltage range: Substitute parts may support extended ranges (2.7V ~ 16V acceptable)
• Switch timing: Substitute parts may have longer switching times (150ns Ton, 100ns Toff acceptable)
• Channel capacitance: Substitute parts may have slightly higher values (9pF acceptable)
• Crosstalk: Substitute parts may have higher crosstalk values (-85dB acceptable)
• Operating temperature: Substitute parts may support extended temperature ranges (-40°C ~ 85°C acceptable)

All four substitute parts (MAX325CSA+, MAX325CSA+T, MAX325ESA+, MAX325ESA+T) meet these substitution criteria. They are manufactured by Analog Devices Inc./Maxim Integrated and maintain identical switch circuit configuration, circuit count, multiplexer ratio, on-state resistance, and 8-SOIC package specifications.

Parameter Comparison

Engineering Selection Recommendations

All four MAX325 variants are active products from Analog Devices Inc./Maxim Integrated and provide direct functional equivalence to the obsolete ISL84543CBZ. Selection between substitute parts is determined by packaging and temperature requirements:

MAX325CSA+ and MAX325CSA+T are suitable for applications operating within the 0°C to 70°C temperature range. These parts maintain the same operating temperature specification as the ISL84543CBZ. MAX325CSA+ is supplied in tube packaging, while MAX325CSA+T is supplied in Tape & Reel format for automated assembly processes.

MAX325ESA+ and MAX325ESA+T extend the operating temperature range to -40°C to 85°C, accommodating industrial and automotive applications requiring wider temperature performance. MAX325ESA+ is supplied in tube packaging, while MAX325ESA+T is supplied in Cut Tape and Digi-Reel® format.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and identical electrical performance within the specified parameter tolerances. The extended supply voltage range (2.7V ~ 16V) of MAX325 variants provides additional design flexibility compared to the ISL84543CBZ (2.7V ~ 12V).

Frequently Asked Questions (FAQ)

Q: Can MAX325 parts directly replace ISL84543CBZ in existing designs?

A: Yes. All four MAX325 variants (MAX325CSA+, MAX325CSA+T, MAX325ESA+, MAX325ESA+T) are direct functional replacements. They maintain identical switch circuit configuration (SPST NO/NC), circuit count (2), on-state resistance (60Ohm), and 8-SOIC package specifications. Pin-to-pin compatibility is maintained.

Q: What is the difference between MAX325CSA+ and MAX325ESA+ variants?

A: The primary difference is operating temperature range. MAX325CSA+ operates from 0°C to 70°C, matching the ISL84543CBZ specification. MAX325ESA+ operates from -40°C to 85°C, providing extended temperature performance for industrial and automotive applications. All other electrical parameters are identical.

Q: What packaging options are available for MAX325 substitutes?

A: Four packaging configurations are available. MAX325CSA+ and MAX325ESA+ are supplied in tube packaging. MAX325CSA+T is supplied in Tape & Reel (TR) format. MAX325ESA+T is supplied in Cut Tape (CT) and Digi-Reel® format. Selection depends on assembly process requirements and volume.

Q: Are there any electrical performance differences between ISL84543CBZ and MAX325 substitutes?

A: Minor differences exist within acceptable substitution parameters. MAX325 variants have slightly longer switch times (150ns Ton, 100ns Toff versus 100ns Ton, 75ns Toff), marginally higher channel capacitance (9pF versus 8pF), and slightly higher crosstalk (-85dB versus -90dB @ 1MHz). These variations remain within typical application tolerances for analog switching circuits. Supply voltage range is extended on MAX325 parts (2.7V ~ 16V versus 2.7V ~ 12V).

Q: Are all substitute parts RoHS compliant?

A: Yes. All four MAX325 variants are ROHS3 compliant and maintain MSL Level 1 (unlimited) moisture sensitivity rating, matching the ISL84543CBZ compliance status.

Q: Which substitute part should be selected for new production designs?

A: For applications operating within 0°C to 70°C, either MAX325CSA+ or MAX325CSA+T provides direct equivalence. For applications requiring extended temperature performance (-40°C to 85°C), select MAX325ESA+ or MAX325ESA+T. Packaging selection (tube versus tape & reel) depends on manufacturing process automation requirements.