ISL43140IVZ Equivalent & Substitute Parts

Part Overview

The ISL43140IVZ is a 4-circuit SPST-NC analog switch IC manufactured by Renesas Electronics Corporation, housed in a 16-TSSOP package. This device features a 65Ohm on-state resistance and operates across supply voltages of 2.7V to 12V (single supply) or ±2.6V to 6V (dual supply). The ISL43140IVZ is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	ISL43140IVZ
Manufacturer	Renesas Electronics Corporation
Switch Circuit Type	SPST - 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-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ISL43140IVZ is determined by the following critical parameters:

Switch Circuit Type: Must be SPST - NC (Single Pole Single Throw - Normally Closed)
Number of Circuits: Must be 4 circuits
Multiplexer/Demultiplexer Circuit: Must be 1:1 configuration
Package Type: Must be 16-TSSOP or compatible surface-mount package
On-State Resistance: Acceptable range is 1.1Ohm to 100Ohm (lower resistance provides improved performance; higher resistance requires application verification)
Supply Voltage Compatibility: Must support overlapping or equivalent voltage ranges
Operating Temperature Range: Must cover -40°C to 85°C minimum
Compliance: Must maintain ROHS3 compliance and MSL 1 rating

Substitute parts are grouped into three categories based on on-state resistance characteristics:

Category A - Low Resistance (1.1Ohm): ADG1611BRUZ, ADG1611BRUZ-REEL, ADG1611BRUZ-REEL7

Category B - Medium Resistance (5.3Ohm to 45Ohm): DG454EQ-T1-E3, DG411CUE+

Category C - High Resistance (100Ohm): MAX4521CEE+, MAX4521CEE+T, MAX4521CUE+, MAX4521CUE+T, MAX4521EEE+

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	ΔRon (Max)	V+ Supply	V± Supply	Ton/Toff (Max)	Charge Injection	Operating Temp	Package	Product Status
ISL43140IVZ	Renesas	65Ohm	2Ohm	2.7V ~ 12V	±2.6V ~ 6V	80ns, 30ns	1pC	-40°C ~ 85°C	16-TSSOP	Obsolete
ADG1611BRUZ	Analog Devices	1.1Ohm	30mOhm	3.3V ~ 16V	±3.3V ~ 8V	156ns, 87ns	170pC	-40°C ~ 125°C	16-TSSOP	Active
ADG1611BRUZ-REEL	Analog Devices	1.1Ohm	30mOhm	3.3V ~ 16V	±3.3V ~ 8V	156ns, 87ns	170pC	-40°C ~ 125°C	16-TSSOP	Active
ADG1611BRUZ-REEL7	Analog Devices	1.1Ohm	30mOhm	3.3V ~ 16V	±3.3V ~ 8V	156ns, 87ns	170pC	-40°C ~ 125°C	16-TSSOP	Active
DG454EQ-T1-E3	Vishay Siliconix	5.3Ohm	120mOhm	12V ~ 36V	±5V ~ 15V	118ns, 97ns	22pC	-40°C ~ 125°C	16-TSSOP	Active
DG411CUE+	Analog Devices/Maxim	45Ohm	3Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	5pC	0°C ~ 70°C	16-TSSOP	Active
MAX4521CEE+	Analog Devices/Maxim	100Ohm	1Ohm	2V ~ 12V	±2V ~ 6V	80ns, 30ns	1pC	0°C ~ 70°C	16-QSOP	Active
MAX4521CEE+T	Analog Devices/Maxim	100Ohm	1Ohm	2V ~ 12V	±2V ~ 6V	80ns, 30ns	1pC	0°C ~ 70°C	16-QSOP	Active
MAX4521CUE+	Analog Devices/Maxim	100Ohm	1Ohm	2V ~ 12V	±2V ~ 6V	80ns, 30ns	1pC	0°C ~ 70°C	16-TSSOP	Active
MAX4521CUE+T	Analog Devices/Maxim	100Ohm	1Ohm	2V ~ 12V	±2V ~ 6V	80ns, 30ns	1pC	0°C ~ 70°C	16-TSSOP	Active
MAX4521EEE+	Analog Devices/Maxim	100Ohm	1Ohm	2V ~ 12V	±2V ~ 6V	80ns, 30ns	1pC	-40°C ~ 85°C	16-QSOP	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

MAX4521CUE+ and MAX4521CUE+T are the closest functional equivalents to ISL43140IVZ. Both devices feature identical on-state resistance (100Ohm), matching switch timing (80ns, 30ns), and equivalent charge injection (1pC). The MAX4521 series maintains the same supply voltage range (2V ~ 12V single, ±2V ~ 6V dual) and operates within the required temperature range. Both are active products with ROHS3 compliance and MSL 1 rating. The primary difference is packaging: MAX4521CUE+ uses 16-TSSOP (matching ISL43140IVZ), while MAX4521CEE+ and MAX4521EEE+ use 16-QSOP. MAX4521EEE+ extends the operating temperature to -40°C ~ 85°C, matching the original specification exactly.

For Low-Resistance Applications

ADG1611BRUZ, ADG1611BRUZ-REEL, and ADG1611BRUZ-REEL7 offer significantly lower on-state resistance (1.1Ohm) compared to ISL43140IVZ (65Ohm). These devices are suitable for applications requiring minimal signal attenuation and improved bandwidth (38MHz). All three variants are active products with extended operating temperature (-40°C ~ 125°C) and ROHS3 compliance. The variants differ only in packaging format: standard tube, cut tape with Digi-Reel, and alternative Digi-Reel configuration.

For Medium-Resistance Applications

DG454EQ-T1-E3 provides 5.3Ohm on-state resistance with faster switching times (118ns, 97ns) and lower charge injection (22pC). This device operates at higher supply voltages (12V ~ 36V single, ±5V ~ 15V dual) and is suitable for applications requiring improved performance metrics. DG411CUE+ offers 45Ohm resistance with minimal charge injection (5pC) but operates at higher supply voltages (10V ~ 30V single, ±4.5V ~ 20V dual) and has a narrower operating temperature range (0°C ~ 70°C).

Compliance and Availability

All substitute parts maintain ROHS3 compliance and MSL 1 rating. All are active products with established supply chains, ensuring long-term availability. Selection should prioritize active products over obsolete alternatives to ensure design longevity.

Frequently Asked Questions (FAQ)

Q: Can MAX4521CUE+ directly replace ISL43140IVZ without circuit modifications?

A: MAX4521CUE+ is functionally compatible with ISL43140IVZ in applications where 100Ohm on-state resistance is acceptable. Both devices feature identical switch timing (80ns, 30ns), charge injection (1pC), and supply voltage ranges (2V ~ 12V single, ±2V ~ 6V dual). The 16-TSSOP package is identical. However, the higher on-state resistance (100Ohm vs. 65Ohm) may affect signal attenuation in low-impedance circuits. Circuit simulation is recommended for critical applications.

Q: What is the difference between ADG1611BRUZ, ADG1611BRUZ-REEL, and ADG1611BRUZ-REEL7?

A: These three part numbers represent the same device with different packaging and distribution formats. ADG1611BRUZ is supplied in standard tube packaging. ADG1611BRUZ-REEL and ADG1611BRUZ-REEL7 are supplied on cut tape with Digi-Reel, differing only in reel configuration. Electrical specifications are identical across all three variants.

Q: Why does DG454EQ-T1-E3 require higher supply voltages than ISL43140IVZ?

A: DG454EQ-T1-E3 is designed for higher-voltage applications (12V ~ 36V single supply) and features lower on-state resistance (5.3Ohm) optimized for these voltage ranges. ISL43140IVZ operates at lower voltages (2.7V ~ 12V). Selection depends on the application's supply voltage requirements.

Q: Is MAX4521EEE+ suitable for the full operating temperature range of ISL43140IVZ?

A: Yes. MAX4521EEE+ operates across -40°C ~ 85°C, matching ISL43140IVZ's temperature specification exactly. However, MAX4521EEE+ uses 16-QSOP packaging rather than 16-TSSOP, requiring PCB layout modifications. Other MAX4521 variants (CEE+, CUE+) operate only to 0°C ~ 70°C or 70°C maximum.

Q: Can I use ADG1611BRUZ in place of ISL43140IVZ for signal switching applications?

A: ADG1611BRUZ is suitable for signal switching with superior performance characteristics: 1.1Ohm on-state resistance (vs. 65Ohm), 38MHz bandwidth, and extended temperature range (-40°C ~ 125°C). The lower resistance reduces signal loss and improves bandwidth. Package compatibility (16-TSSOP) is maintained. This substitution is appropriate for applications benefiting from improved performance.

Q: What packaging considerations apply when selecting a substitute?

A: ISL43140IVZ uses 16-TSSOP packaging. Direct pin-compatible substitutes maintaining 16-TSSOP are ADG1611BRUZ variants, DG454EQ-T1-E3, DG411CUE+, MAX4521CUE+, and MAX4521CUE+T. MAX4521CEE+, MAX4521CEE+T, and MAX4521EEE+ use 16-QSOP packaging, requiring PCB redesign. Verify footprint compatibility before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching ISL43140IVZ specifications.

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