ISL43142IRZ Equivalent & Substitute Parts

Part Overview

The ISL43142IRZ is a 4-circuit SPST-NO/NC analog switch manufactured by Renesas Electronics Corporation, designed for low-impedance signal routing applications. This device features 65Ohm on-state resistance and operates across single supply (2.7V ~ 12V) and dual supply (±2.6V ~ 6V) configurations. The ISL43142IRZ is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NO/NC
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	65Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±2.6V ~ 6V
Switch Time (Ton, Toff) (Max)	80ns, 30ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	7pF, 7pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-90dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-VFQFN Exposed Pad
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ISL43142IRZ is determined by the following mandatory parameters:

Switch circuit configuration: SPST - NO/NC (4 circuits, 1:1 multiplexing)
Package type: Surface mount, 16-pin QFN/LFCSP footprint compatibility
Supply voltage overlap: Minimum overlap between ISL43142IRZ supply range (2.7V ~ 12V single, ±2.6V ~ 6V dual) and substitute device supply range
RoHS3 compliance and EAR99 classification
Operating temperature range: Minimum -40°C lower bound

The identified substitute parts—ADG4613BCPZ-REEL7 and ADG1213YCPZ-500RL7—satisfy the core functional requirements and compliance criteria. Substitution feasibility depends on application-specific tolerance for variations in on-state resistance, switching speed, and leakage current within the constraints of the target circuit design.

Parameter Comparison

Parameter	ISL43142IRZ	ADG4613BCPZ-REEL7	ADG1213YCPZ-500RL7
Manufacturer	Renesas Electronics	Analog Devices Inc.	Analog Devices Inc.
Switch Circuit	SPST - NO/NC	SPST - NO/NC	SPST - NO/NC
Number of Circuits	4	4	4
Multiplexer/Demultiplexer	1:1	1:1	1:1
On-State Resistance (Max)	65Ohm	5.1Ohm	190Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm	50mOhm	2.5Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V	3V ~ 12V	5V ~ 16.5V
Voltage - Supply, Dual (V±)	±2.6V ~ 6V	±3V ~ 5.5V	±4.5V ~ 16.5V
Switch Time Ton (Max)	80ns	73ns	130ns
Switch Time Toff (Max)	30ns	91ns	115ns
Charge Injection	1pC	292pC	-0.3pC
Channel Capacitance CS(off)	7pF	11.5pF	1.1pF
Channel Capacitance CD(off)	7pF	11.5pF	1.2pF
Current - Leakage (IS(off)) (Max)	1nA	10nA	100pA
Crosstalk	-90dB @ 100kHz	-74dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C
Package / Case	16-VFQFN Exposed Pad	16-WFQFN Exposed Pad, CSP	16-WFQFN Exposed Pad, CSP
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both ADG4613BCPZ-REEL7 and ADG1213YCPZ-500RL7 are active products with ROHS3 compliance and EAR99 classification, providing long-term availability and regulatory alignment compared to the obsolete ISL43142IRZ.

ADG4613BCPZ-REEL7 offers the lowest on-state resistance (5.1Ohm) and superior channel-to-channel matching (50mOhm), making it suitable for applications requiring minimal signal attenuation and impedance consistency. This device operates within the ISL43142IRZ single supply range (3V ~ 12V overlap) and extends the upper temperature rating to 105°C. The higher charge injection (292pC) and increased channel capacitance (11.5pF) must be evaluated against application bandwidth and signal integrity requirements.

ADG1213YCPZ-500RL7 provides the highest on-state resistance (190Ohm) and lowest leakage current (100pA), with superior crosstalk performance (-90dB @ 1MHz). This device requires a minimum 5V single supply, exceeding the ISL43142IRZ lower bound of 2.7V. The extended temperature range (-40°C ~ 125°C) and improved charge injection characteristics (-0.3pC) support precision analog applications.

Selection between these substitutes depends on circuit requirements for impedance, leakage, switching speed, and supply voltage compatibility.

Frequently Asked Questions (FAQ)

Q: Can ADG4613BCPZ-REEL7 directly replace ISL43142IRZ in all applications?

A: Direct replacement requires circuit-level evaluation. The ADG4613BCPZ-REEL7 operates at 3V minimum supply voltage, which exceeds the ISL43142IRZ lower bound of 2.7V. Applications operating below 3V single supply are not compatible. The significantly lower on-state resistance (5.1Ohm vs. 65Ohm) reduces signal attenuation but increases power dissipation in high-impedance load conditions. The higher charge injection (292pC) may introduce distortion in precision signal-switching applications.

Q: What are the package compatibility considerations?

A: The ISL43142IRZ uses 16-VFQFN packaging, while both substitutes use 16-WFQFN or 16-LFCSP packaging. Although both are 16-pin QFN variants with 3x3mm footprints, physical dimensions and pad layouts may differ. PCB layout verification is required to confirm mechanical and electrical compatibility before implementation.

Q: Which substitute is better for low-voltage applications?

A: ADG4613BCPZ-REEL7 supports operation down to 3V single supply, making it the only viable substitute for applications requiring 2.7V ~ 3V operation. ADG1213YCPZ-500RL7 requires minimum 5V single supply and is unsuitable for low-voltage designs.

Q: How do leakage current differences affect circuit performance?

A: The ISL43142IRZ specifies 1nA maximum leakage. ADG4613BCPZ-REEL7 exhibits 10nA leakage, while ADG1213YCPZ-500RL7 provides superior performance at 100pA. For applications with high-impedance signal paths or precision measurement requirements, the ADG1213YCPZ-500RL7 leakage specification is advantageous. The ADG4613BCPZ-REEL7 leakage increase may be acceptable in moderate-impedance circuits.

Q: Are both substitutes suitable for high-frequency applications?

A: ADG1213YCPZ-500RL7 specifies -3dB bandwidth of 1GHz with crosstalk of -90dB @ 1MHz, supporting high-frequency signal routing. ADG4613BCPZ-REEL7 provides 250MHz -3dB bandwidth with -74dB crosstalk @ 1MHz, suitable for moderate-frequency applications. Application bandwidth requirements determine which substitute is appropriate.

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