ISL84543IH-T Equivalent & Substitute Parts

Part Overview

The ISL84543IH-T is a 2-circuit IC switch manufactured by Renesas Electronics Corporation, configured as SPST (Single Pole Single Throw) with NO/NC (Normally Open/Normally Closed) capability. This component operates with a single supply voltage range of 2.7V to 12V and features a 60Ohm on-state resistance in a SOT-23-8 surface mount package.

The ISL84543IH-T is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this interface switch.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NO/NC
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm
Supply Voltage Range (V+)	2.7V ~ 12V
Switch Time - Ton (Max)	100ns
Switch Time - Toff (Max)	75ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-90dB @ 1MHz
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	SOT-23-8
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ISL84543IH-T is determined by strict equivalence across the following critical parameters:

Switch circuit configuration (SPST - NO/NC)
Number of circuits (2)
Multiplexer/demultiplexer circuit topology (1:1)
On-state resistance maximum rating (60Ohm)
Channel-to-channel matching specification (800mOhm)
Supply voltage range (2.7V ~ 12V single supply)
Switch timing specifications (Ton 100ns max, Toff 75ns max)
Charge injection (1pC)
Channel capacitance values (8pF, 8pF)
Leakage current specification (100pA max)
Crosstalk performance (-90dB @ 1MHz)
Operating temperature range (-40°C ~ 85°C)
Package type (SOT-23-8)
Mounting type (Surface Mount)

The MAX4543EKA+T meets all specified electrical and mechanical parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	ISL84543IH-T	MAX4543EKA+T
Manufacturer	Renesas Electronics Corporation	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NO/NC	SPST - NO/NC
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	60Ohm	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm	800mOhm
Supply Voltage (V+)	2.7V ~ 12V	2.7V ~ 12V
Switch Time - Ton (Max)	100ns	100ns
Switch Time - Toff (Max)	75ns	75ns
Charge Injection	1pC	1pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF	8pF, 8pF
Current - Leakage (IS(off)) (Max)	100pA	100pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	SOT-23-8	SOT-23-8
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	-	Tape & Reel (TR)

Engineering Selection Recommendations

The MAX4543EKA+T is the qualified substitute for the ISL84543IH-T based on the following factors:

Electrical Equivalence: All electrical parameters match exactly, including switch configuration, on-state resistance, timing specifications, and signal integrity characteristics. The component is functionally interchangeable at the circuit level.

Product Status: The MAX4543EKA+T maintains Active product status, ensuring ongoing availability and manufacturer support. The ISL84543IH-T is Obsolete, making substitution necessary for continued supply chain access.

Compliance Advantage: The MAX4543EKA+T is ROHS3 Compliant, whereas the ISL84543IH-T is RoHS non-compliant. This provides regulatory compliance benefits for new designs and manufacturing environments with RoHS requirements.

Package Compatibility: Both components use identical SOT-23-8 surface mount packaging, enabling direct PCB layout compatibility without redesign.

Inventory Availability: The MAX4543EKA+T is available in Tape & Reel packaging with significantly higher inventory levels (3628 Pcs), supporting production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAX4543EKA+T replace the ISL84543IH-T in existing designs?

A: Yes. The MAX4543EKA+T is a parametric equivalent with identical electrical specifications and SOT-23-8 package compatibility. No circuit modifications are required.

Q: Are there any differences in switch performance between these parts?

A: No. Both components specify identical on-state resistance (60Ohm), switch timing (Ton 100ns, Toff 75ns), charge injection (1pC), and crosstalk performance (-90dB @ 1MHz).

Q: What is the significance of the RoHS compliance difference?

A: The MAX4543EKA+T is ROHS3 Compliant, meeting current environmental and regulatory standards. The ISL84543IH-T is RoHS non-compliant. For applications subject to RoHS requirements, the MAX4543EKA+T is the appropriate selection.

Q: Are the packages physically identical?

A: Yes. Both components use SOT-23-8 surface mount packaging with identical pin configurations and footprints. PCB layouts require no modification.

Q: Why is the ISL84543IH-T classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The MAX4543EKA+T maintains Active status with ongoing availability and support.

Q: What supply voltage range do these components support?

A: Both the ISL84543IH-T and MAX4543EKA+T operate with a single supply voltage range of 2.7V to 12V, supporting a wide range of system voltage requirements.

Q: Is the MAX4543EKA+T available in different packaging formats?

A: The MAX4543EKA+T is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes and high-volume production.

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