ISL84542IP Equivalent & Substitute Parts

Part Overview

The ISL84542IP is a 2-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch manufactured by Renesas Electronics Corporation. This component functions as a precision electronic switch with 60Ohm on-state resistance, designed for signal routing and multiplexing applications in analog circuits. The ISL84542IP is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC
Number of Circuits	2
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm
Supply Voltage Range (Single)	2.7V ~ 12V
Switch Time - Turn On (Max)	100ns
Switch Time - Turn Off (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
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the ISL84542IP is determined by strict equivalence across the following critical parameters:

Switch topology: SPST-NC configuration with 2 independent circuits in 1:1 multiplexer arrangement
On-state resistance: 60Ohm maximum specification
Channel matching: 800mOhm maximum ΔRon tolerance
Package compatibility: 8-DIP through-hole form factor with 0.300" (7.62mm) pitch
Electrical performance: Charge injection, capacitance, leakage current, and crosstalk characteristics within acceptable ranges
Supply voltage: Minimum 2.7V single supply capability

The MAX324CPA+ manufactured by Analog Devices Inc./Maxim Integrated meets these core substitution criteria. Both components share identical switch topology, circuit count, on-state resistance specification, package form factor, and fundamental electrical characteristics necessary for direct functional replacement.

Parameter Comparison

Parameter	ISL84542IP	MAX324CPA+	Compatibility
Switch Circuit Type	SPST - NC	SPST - NC	Identical
Number of Circuits	2	2	Identical
Multiplexer Configuration	1:1	1:1	Identical
On-State Resistance (Max)	60Ohm	60Ohm	Identical
Channel-to-Channel Matching (ΔRon)	800mOhm	800mOhm	Identical
Supply Voltage Range (Single)	2.7V ~ 12V	2.7V ~ 16V	Compatible (MAX324CPA+ supports extended range)
Switch Time - Turn On (Max)	100ns	150ns	Compatible (MAX324CPA+ within acceptable tolerance)
Switch Time - Turn Off (Max)	75ns	100ns	Compatible (MAX324CPA+ within acceptable tolerance)
Charge Injection	1pC	1pC	Identical
Channel Capacitance (CS(off), CD(off))	8pF, 8pF	9pF, 9pF	Compatible (minimal variance)
Current - Leakage (IS(off)) (Max)	100pA	100pA	Identical
Crosstalk	-90dB @ 1MHz	-85dB @ 1MHz	Compatible (MAX324CPA+ within acceptable range)
Operating Temperature Range	-40°C ~ 85°C	0°C ~ 70°C	Conditional (MAX324CPA+ narrower range; verify application requirements)
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	Identical
Mounting Type	Through Hole	Through Hole	Identical

Engineering Selection Recommendations

Product Status Consideration: The ISL84542IP is classified as obsolete, while the MAX324CPA+ is active production. For new designs, ongoing support, and long-term availability, the MAX324CPA+ is the appropriate selection.

Compliance and Certification: The MAX324CPA+ is ROHS3 compliant, whereas the ISL84542IP is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the MAX324CPA+ satisfies current regulatory standards.

Temperature Range: The ISL84542IP operates across -40°C to 85°C, while the MAX324CPA+ operates across 0°C to 70°C. Applications requiring operation below 0°C or above 70°C must retain the ISL84542IP or identify alternative solutions. For standard industrial and commercial temperature ranges (0°C to 70°C), the MAX324CPA+ is suitable.

Electrical Performance: Both components meet the core electrical specifications for analog switch functionality. The MAX324CPA+ exhibits slightly extended supply voltage range (2.7V to 16V versus 2.7V to 12V) and marginally relaxed switching times, which are operationally compatible with ISL84542IP applications.

Frequently Asked Questions (FAQ)

Q: Can the MAX324CPA+ directly replace the ISL84542IP in existing designs?

A: Yes, for applications operating within 0°C to 70°C temperature range. Both components share identical switch topology, circuit count, on-state resistance, package form factor, and core electrical characteristics. The MAX324CPA+ supports extended supply voltage range and is RoHS3 compliant. If your application requires operation below 0°C or above 70°C, the ISL84542IP specifications must be retained.

Q: What are the key differences between these two components?

A: The primary differences are product status (ISL84542IP is obsolete; MAX324CPA+ is active), RoHS compliance (ISL84542IP is non-compliant; MAX324CPA+ is ROHS3 compliant), operating temperature range (ISL84542IP: -40°C to 85°C; MAX324CPA+: 0°C to 70°C), and supply voltage range (ISL84542IP: 2.7V to 12V; MAX324CPA+: 2.7V to 16V). Switching times and channel capacitance show minor variations within acceptable engineering tolerances.

Q: Are the 8-DIP packages physically identical?

A: Yes. Both components use 8-DIP (0.300", 7.62mm) through-hole packages with identical pin spacing and mechanical dimensions, enabling direct PCB footprint compatibility.

Q: What should I consider when selecting between these parts?

A: Evaluate your application's operating temperature requirements, supply voltage range, and regulatory compliance needs. If operation below 0°C or above 70°C is required, the ISL84542IP is necessary. For new designs or systems requiring RoHS compliance, the MAX324CPA+ is the appropriate choice. Both components are electrically equivalent for standard analog switching applications within their respective operating ranges.

Q: Is the MAX324CPA+ available in the same packaging format?

A: Yes. The MAX324CPA+ is supplied in 8-PDIP packaging (tube format), matching the ISL84542IP's 8-DIP through-hole configuration. This ensures mechanical and electrical compatibility with existing PCB designs.

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