ISL84541IBZ Equivalent & Substitute Parts

Part Overview

The ISL84541IBZ is a 2-circuit SPST-NO analog switch manufactured by Renesas Electronics Corporation, housed in an 8-SOIC package with 60Ohm on-state resistance. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The ISL84541IBZ operates across a single supply voltage range of 2.7V to 12V and is suitable for signal routing and multiplexing applications requiring low on-state resistance and fast switching characteristics.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
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 (Ton/Toff Max)	100ns / 75ns
Charge Injection	1pC
Channel Capacitance (CS(off) / CD(off))	8pF / 8pF
Leakage Current (IS(off) Max)	100pA
Crosstalk	-90dB @ 1MHz
Operating Temperature Range	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ISL84541IBZ is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Switch circuit type: SPST - NO
Number of circuits: 2
Multiplexer configuration: 1:1
On-state resistance: 60Ohm maximum
Channel-to-channel matching: 800mOhm
Supply voltage compatibility: minimum 2.7V to 12V range
Package type: 8-SOIC form factor
Operating temperature range: -40°C to 85°C minimum

Substitute Categories:

MFR Recommended Substitute: ISL43120IHZ-T represents a performance upgrade from the same manufacturer (Renesas Electronics Corporation). While it maintains the same circuit topology and supply voltage range, it features reduced on-state resistance (20Ohm vs. 60Ohm), faster switching times (35ns/30ns vs. 100ns/75ns), and improved crosstalk performance (-105dB vs. -90dB). However, it uses a different package (SOT-23-8) and has a higher moisture sensitivity level (MSL 3).

Similar Substitutes: MAX323CSA+, MAX323CSA+T, MAX323ESA+, MAX323ESA+T, MAX4541CSA+, MAX4541CSA+T, MAX4541ESA+T, and MAX4541ESA+ are manufactured by Analog Devices Inc./Maxim Integrated. These parts maintain identical on-state resistance (60Ohm), matching (800mOhm), charge injection (1pC), and channel capacitance specifications. All operate within the 2.7V to 12V supply range and use the same 8-SOIC package. Key differences include extended supply voltage range (2.7V to 16V for MAX323 and MAX4541 series), slightly slower switching times (150ns/100ns), and reduced crosstalk performance (-85dB).

Parameter Comparison

Parameter	ISL84541IBZ	ISL43120IHZ-T	MAX323CSA+	MAX323CSA+T	MAX323ESA+	MAX323ESA+T	MAX4541CSA+	MAX4541CSA+T	MAX4541ESA+T	MAX4541ESA+
Manufacturer	Renesas	Renesas	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	2	2	2	2	2	2	2	2	2	2
Multiplexer Config	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1
On-State Resistance (Max)	60Ohm	20Ohm	60Ohm	60Ohm	60Ohm	60Ohm	60Ohm	60Ohm	60Ohm	60Ohm
Channel-to-Channel Matching	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm
Supply Voltage Range	2.7V ~ 12V	2.7V ~ 12V	2.7V ~ 16V	2.7V ~ 16V	2.7V ~ 16V	2.7V ~ 16V	2.7V ~ 12V	2.7V ~ 12V	2.7V ~ 12V	2.7V ~ 12V
Switch Time (Ton Max)	100ns	35ns	150ns	150ns	150ns	150ns	100ns	100ns	100ns	100ns
Switch Time (Toff Max)	75ns	30ns	100ns	100ns	100ns	100ns	75ns	75ns	75ns	75ns
Charge Injection	1pC	5pC	1pC	1pC	1pC	1pC	1pC	1pC	1pC	1pC
Channel Capacitance (CS/CD off)	8pF / 8pF	8pF / 8pF	9pF / 9pF	9pF / 9pF	9pF / 9pF	9pF / 9pF	8pF / 8pF	8pF / 8pF	8pF / 8pF	8pF / 8pF
Leakage Current (Max)	100pA	100pA	100pA	100pA	100pA	100pA	100pA	100pA	100pA	100pA
Crosstalk @ 1MHz	-90dB	-105dB	-85dB	-85dB	-85dB	-85dB	-90dB	-90dB	-90dB	-90dB
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-SOIC	SOT-23-8	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Performance): MAX4541ESA+ and MAX4541ESA+T are the closest functional equivalents to the ISL84541IBZ. Both maintain 60Ohm on-state resistance, identical switching times (100ns/75ns), matching specifications (800mOhm), and the same 8-SOIC package footprint. These parts are active products with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and handling compatibility. Operating temperature range extends to -40°C to 85°C, matching the original part. The primary difference is the extended supply voltage range (2.7V to 12V), which provides additional design margin.

For Performance Enhancement with Package Change: ISL43120IHZ-T offers superior performance characteristics including 20Ohm on-state resistance (one-third of the original), faster switching times (35ns/30ns), and improved crosstalk performance (-105dB). This part remains within the same manufacturer ecosystem (Renesas Electronics Corporation) and maintains the same supply voltage range. However, substitution requires PCB layout modification due to the SOT-23-8 package change. The higher MSL rating (3) requires controlled moisture handling during assembly.

For Extended Supply Voltage Applications: MAX323ESA+ and MAX323ESA+T support extended supply voltage range (2.7V to 16V) while maintaining identical on-state resistance and matching specifications. These parts are suitable for applications requiring higher supply headroom. Operating temperature range extends to -40°C to 85°C. The 8-SOIC package ensures direct PCB compatibility.

For Tape & Reel Packaging: MAX323CSA+T, MAX4541CSA+T, and MAX4541ESA+T are available in Tape & Reel format, suitable for high-volume automated assembly. These parts maintain identical electrical specifications to their tube-packaged counterparts while offering improved handling for production environments.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements equivalent to the original ISL84541IBZ.

Frequently Asked Questions (FAQ)

Q: Can ISL43120IHZ-T be used as a direct drop-in replacement for ISL84541IBZ?

A: ISL43120IHZ-T is electrically compatible but requires PCB layout modification. The part uses SOT-23-8 package instead of 8-SOIC, necessitating different footprint and trace routing. Electrical performance is superior with lower on-state resistance (20Ohm vs. 60Ohm) and faster switching times. MSL 3 rating requires controlled moisture handling during assembly.

Q: What is the key difference between MAX4541 and MAX323 series substitutes?

A: Both series maintain identical on-state resistance (60Ohm) and switching times matching or exceeding the ISL84541IBZ. The MAX323 series supports extended supply voltage range (2.7V to 16V) compared to MAX4541 (2.7V to 12V). Crosstalk performance is identical at -90dB for MAX4541 and -85dB for MAX323. Both use 8-SOIC package and are ROHS3 compliant.

Q: Are packaging options (Tube vs. Tape & Reel) electrically equivalent?

A: Yes. Tube and Tape & Reel variants of the same part number (e.g., MAX4541CSA+ vs. MAX4541CSA+T) are electrically identical. Packaging differences affect only handling and assembly processes. Tape & Reel format is optimized for automated high-volume production, while Tube packaging is suitable for lower-volume or manual assembly.

Q: Which substitute is recommended for applications requiring -40°C to 85°C operating temperature?

A: MAX323ESA+, MAX323ESA+T, MAX4541ESA+T, and MAX4541ESA+ all support the full -40°C to 85°C temperature range. ISL43120IHZ-T also supports this range. MAX323CSA+ and MAX4541CSA+ are limited to 0°C to 70°C and are not suitable for extended temperature applications.

Q: What is the impact of channel capacitance differences on circuit performance?

A: ISL84541IBZ and MAX4541 series specify 8pF channel capacitance (CS(off)/CD(off)). MAX323 series specifies 9pF. This 1pF difference may affect high-frequency signal integrity and bandwidth characteristics. For applications operating near the frequency limits of the switch, the lower capacitance of ISL84541IBZ and MAX4541 series is preferred.

Q: Can ISL43120IHZ-T be used in applications where on-state resistance must not exceed 60Ohm?

A: No. ISL43120IHZ-T has maximum on-state resistance of 20Ohm, which is lower than the 60Ohm specification. While this represents improved performance, applications with specific impedance matching or signal attenuation requirements based on 60Ohm resistance should use MAX4541 or MAX323 series substitutes.

Q: What is the significance of the obsolete status of ISL84541IBZ?

A: Obsolete status indicates the part is no longer manufactured by Renesas Electronics Corporation. Existing inventory may be available through distributors, but long-term supply cannot be guaranteed. Active substitute parts (ISL43120IHZ-T, MAX323 series, MAX4541 series) ensure continued availability for new designs and production requirements.

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