ISL84543CPZ Equivalent & Substitute Parts

Part Overview

The ISL84543CPZ is a 2-circuit IC switch manufactured by Renesas Electronics Corporation, featuring SPST (Single Pole Single Throw) NO/NC configuration with 60Ohm on-state resistance in an 8-DIP package. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The part operates across a 2.7V to 12V supply range and is suitable for analog signal switching applications requiring low on-state resistance and minimal crosstalk.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISL84543CPZ
Manufacturer	Renesas Electronics Corporation
Category	Interface
Product Status	Obsolete
Switch Circuit Configuration	SPST - NO/NC
Number of Circuits	2
On-State Resistance (Max)	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Switch Time (Ton, Toff) (Max)	100ns, 75ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ISL84543CPZ are identified based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Switch Circuit Configuration: Must be SPST - NO/NC
Number of Circuits: Must be 2
On-State Resistance (Max): Must be 60Ohm
Channel-to-Channel Matching (ΔRon): Must be 800mOhm
Package / Case: Must be 8-DIP (0.300", 7.62mm)
Mounting Type: Must be Through Hole
Multiplexer/Demultiplexer Circuit: Must be 1:1

The substitute parts MAX325CPA+ and MAX325EPA+ meet all mandatory electrical and mechanical parameters. Both are manufactured by Analog Devices Inc./Maxim Integrated and maintain identical circuit configuration, resistance specifications, and package form factor. Differences in supply voltage range, switching time, and operating temperature represent extended or alternative performance characteristics that do not preclude substitution when application requirements permit.

Parameter Comparison

Parameter	ISL84543CPZ	MAX325CPA+	MAX325EPA+
Manufacturer	Renesas Electronics Corporation	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Active
Switch Circuit	SPST - NO/NC	SPST - NO/NC	SPST - NO/NC
Number of Circuits	2	2	2
On-State Resistance (Max)	60Ohm	60Ohm	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm	800mOhm	800mOhm
Voltage - Supply, Single (V+)	2.7V ~ 12V	2.7V ~ 16V	2.7V ~ 16V
Switch Time (Ton, Toff) (Max)	100ns, 75ns	150ns, 100ns	150ns, 100ns
Charge Injection	1pC	1pC	1pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF	9pF, 9pF	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA	100pA	100pA
Crosstalk	-90dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both MAX325CPA+ and MAX325EPA+ are active production parts from Analog Devices Inc./Maxim Integrated, providing long-term availability and supply chain stability compared to the obsolete ISL84543CPZ. Both substitute parts maintain identical core electrical specifications: 60Ohm on-state resistance, 800mOhm channel-to-channel matching, 1pC charge injection, and 100pA maximum leakage current.

MAX325CPA+ operates within the 0°C to 70°C temperature range, matching the original ISL84543CPZ specification. This part is suitable for applications with identical thermal requirements.

MAX325EPA+ extends the operating temperature range to -40°C to 85°C, providing enhanced thermal performance for applications requiring extended temperature operation. This part also supports supply voltages up to 16V compared to the ISL84543CPZ maximum of 12V.

Both substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, maintaining environmental and regulatory compliance equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX325CPA+ or MAX325EPA+ be used as direct replacements for ISL84543CPZ?

A: Both MAX325CPA+ and MAX325EPA+ meet the mandatory electrical and mechanical substitution criteria: identical switch circuit configuration (SPST - NO/NC), number of circuits (2), on-state resistance (60Ohm), channel-to-channel matching (800mOhm), and 8-DIP package form factor. Direct pin-compatible substitution is supported.

Q: What are the differences between MAX325CPA+ and MAX325EPA+?

A: The primary differences are operating temperature range and supply voltage specification. MAX325CPA+ operates from 0°C to 70°C, while MAX325EPA+ operates from -40°C to 85°C. Both support supply voltages from 2.7V to 16V. Selection depends on application thermal requirements.

Q: Are there performance differences in switching characteristics?

A: The ISL84543CPZ specifies switch times of 100ns (Ton) and 75ns (Toff). Both MAX325CPA+ and MAX325EPA+ specify 150ns (Ton) and 100ns (Toff). These represent slower switching times but maintain the same on-state resistance and leakage specifications. Applications sensitive to switching speed should evaluate this parameter.

Q: Is the 8-DIP package identical across all three parts?

A: All three parts use the 8-DIP (0.300", 7.62mm) package with through-hole mounting. PCB layout and footprint compatibility is maintained across ISL84543CPZ, MAX325CPA+, and MAX325EPA+.

Q: What is the significance of the crosstalk specification difference?

A: ISL84543CPZ specifies -90dB crosstalk at 1MHz, while both MAX325CPA+ and MAX325EPA+ specify -85dB at 1MHz. This 5dB difference represents slightly higher crosstalk in the substitute parts. Applications with stringent crosstalk requirements should evaluate this parameter against system specifications.

Q: Are all three parts RoHS compliant?

A: All three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, maintaining equivalent environmental and regulatory compliance.

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