ISL43112IH-T Equivalent & Substitute Parts

Part Overview

The ISL43112IH-T is a single-circuit SPST-NO (Single Pole Single Throw - Normally Open) IC switch manufactured by Renesas Electronics Corporation. This interface component features a 20Ohm on-state resistance and operates across a dual supply voltage range of ±1.5V to 6V. The device is packaged in a 5-SOT (SC-74A, SOT-753) surface mount configuration.

The ISL43112IH-T is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this switching interface.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	20Ohm
Voltage - Supply, Dual (V±)	±1.5V ~ 6V
Switch Time (Ton, Toff) (Max)	70ns, 45ns
Charge Injection	7pC
Channel Capacitance (CS(off), CD(off))	13pF, 13pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
Supplier Device Package	5-SOT
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the ISL43112IH-T is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit type: SPST - NO
Circuit configuration: 1:1 multiplexer/demultiplexer
Single circuit count
On-state resistance: 20Ohm (primary requirement)
Dual supply voltage range compatibility: ±1.5V ~ 6V
Surface mount packaging in 5-SOT configuration
Operating temperature range: -40°C ~ 85°C

Substitution Categories:

Direct Equivalent (Identical Specifications): ISL43112IHZ-T matches all electrical and mechanical parameters of the ISL43112IH-T. The primary distinction is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

Functional Equivalents (20Ohm On-State Resistance): MAX4516CUK+T and TS12A4516DBVR provide identical 20Ohm on-state resistance with compatible dual supply voltage ranges and operating temperature specifications. These parts maintain the same switching performance envelope required for direct replacement.

Performance Alternatives (Lower On-State Resistance): ADG701LBRJZ-500RL7 and SN74LVC1G66 series devices offer superior switching characteristics with lower on-state resistance (3Ohm and 10Ohm respectively), faster switching times, and higher bandwidth. These are suitable where improved performance is acceptable.

Higher Impedance Alternatives (250Ohm On-State Resistance): MAX4503CUK+T and MAX4503EUK+T provide SPST-NO switching with significantly higher on-state resistance. These are applicable only in applications where impedance is not a limiting factor.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	On-State Resistance (Max)	Voltage - Supply, Dual (V±)	Switch Time Ton/Toff (Max)	Operating Temperature	Package	Product Status	RoHS Status
ISL43112IH-T	Renesas Electronics	SPST - NO	20Ohm	±1.5V ~ 6V	70ns, 45ns	-40°C ~ 85°C	5-SOT	Obsolete	RoHS non-compliant
ISL43112IHZ-T	Renesas Electronics	SPST - NO	20Ohm	±1.5V ~ 6V	70ns, 45ns	-40°C ~ 85°C	5-SOT	Active	ROHS3 Compliant
MAX4516CUK+T	Analog Devices Inc./Maxim Integrated	SPST - NO	20Ohm	±1V ~ 6V	100ns, 75ns	0°C ~ 70°C	SOT-23-5	Active	ROHS3 Compliant
TS12A4516DBVR	Texas Instruments	SPST - NO	20Ohm	±1V ~ 6V	75ns, 45ns	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant
ADG701LBRJZ-500RL7	Analog Devices Inc.	SPST - NO	3Ohm	1.8V ~ 5V (Single)	12ns, 8ns (Typ)	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant
SN74LVC1G66DBVR	Texas Instruments	SPST - NO	10Ohm	1.65V ~ 5.5V (Single)	4.2ns, 5ns	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant
MAX4503CUK+T	Analog Devices Inc./Maxim Integrated	SPST - NO	250Ohm	±1V ~ 6V	150ns, 100ns	0°C ~ 70°C	SOT-23-5	Active	ROHS3 Compliant
MAX4503EUK+T	Analog Devices Inc./Maxim Integrated	SPST - NO	250Ohm	±1V ~ 6V	150ns, 100ns	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

ISL43112IHZ-T is the primary substitute. This part maintains all electrical specifications of the ISL43112IH-T while offering Active product status and ROHS3 compliance. The packaging and performance characteristics are identical, enabling direct substitution without design modification.

For Applications Requiring RoHS Compliance:

ISL43112IHZ-T, MAX4516CUK+T, TS12A4516DBVR, and all Analog Devices and Texas Instruments alternatives listed are ROHS3 compliant. Selection among these depends on operating temperature requirements and supply voltage specifications.

For Extended Temperature Range (-40°C ~ 85°C):

ISL43112IHZ-T, TS12A4516DBVR, ADG701LBRJZ-500RL7, SN74LVC1G66DBVR, and MAX4503EUK+T support the full -40°C to 85°C operating range. MAX4516CUK+T and MAX4503CUK+T are limited to 0°C ~ 70°C.

For Dual Supply Voltage Compatibility (±1.5V ~ 6V or ±1V ~ 6V):

ISL43112IHZ-T, MAX4516CUK+T, TS12A4516DBVR, MAX4503CUK+T, and MAX4503EUK+T support dual supply operation. ADG701LBRJZ-500RL7 and SN74LVC1G66DBVR operate on single supply voltage only.

For Superior Switching Performance:

SN74LVC1G66DBVR offers the fastest switching times (4.2ns, 5ns) and highest bandwidth (300MHz) among available substitutes, with 10Ohm on-state resistance. This option is suitable for high-speed applications where the lower impedance is beneficial.

Frequently Asked Questions (FAQ)

Q: Can ISL43112IHZ-T be used as a direct replacement for ISL43112IH-T?

A: Yes. ISL43112IHZ-T is electrically and mechanically identical to ISL43112IH-T. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Direct substitution is possible without design changes.

Q: What is the difference between the ISL43112IH-T and MAX4516CUK+T?

A: Both devices are SPST-NO switches with 20Ohm on-state resistance and dual supply voltage operation. Key differences include: MAX4516CUK+T has a narrower supply range (±1V ~ 6V vs. ±1.5V ~ 6V), slower switching times (100ns/75ns vs. 70ns/45ns), and a restricted operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C). MAX4516CUK+T is suitable for applications not requiring extended temperature operation.

Q: Why would I choose SN74LVC1G66DBVR over ISL43112IHZ-T?

A: SN74LVC1G66DBVR offers superior switching performance with 10Ohm on-state resistance, faster switching times (4.2ns/5ns), and higher bandwidth (300MHz). However, it operates on single supply voltage (1.65V ~ 5.5V) rather than dual supply. Selection depends on whether your application requires dual supply operation or benefits from improved switching characteristics.

Q: Are all substitute parts RoHS compliant?

A: ISL43112IH-T is RoHS non-compliant. All listed substitutes (ISL43112IHZ-T, MAX4516CUK+T, TS12A4516DBVR, ADG701LBRJZ-500RL7, SN74LVC1G66DBVR, MAX4503CUK+T, MAX4503EUK+T) are ROHS3 compliant.

Q: Can MAX4503CUK+T or MAX4503EUK+T replace ISL43112IH-T?

A: MAX4503 devices provide SPST-NO switching with dual supply voltage compatibility but feature 250Ohm on-state resistance compared to 20Ohm for ISL43112IH-T. These parts are suitable only for applications where higher impedance is acceptable. They are not direct replacements for impedance-sensitive circuits.

Q: What is the packaging difference between ISL43112IH-T and the substitute parts?

A: ISL43112IH-T uses 5-SOT packaging (SC-74A, SOT-753). Most substitutes use SOT-23-5 packaging, which is physically compatible with 5-SOT footprints. Both are surface mount configurations with identical pin counts and similar physical dimensions, enabling PCB-level compatibility.

Q: Which substitute offers the best performance for high-speed applications?

A: SN74LVC1G66DBVR provides the fastest switching performance with 4.2ns turn-on and 5ns turn-off times, plus 300MHz bandwidth. However, this device operates on single supply voltage (1.65V ~ 5.5V) and features 10Ohm on-state resistance. Compatibility depends on your specific supply voltage and impedance requirements.

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