ISL43110IH-T Equivalent & Substitute Parts

Part Overview

The ISL43110IH-T is a single-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch manufactured by Renesas Electronics Corporation. This interface IC operates with a single supply voltage range of 2.4V to 12V and features a 10Ohm on-state resistance with 80ns turn-on and 50ns turn-off switching times. The device is packaged in a 5-SOT (SC-74A) surface mount configuration.

The ISL43110IH-T is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this switch topology.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	10Ohm
Voltage - Supply, Single (V+)	2.4V ~ 12V
Switch Time (Ton, Toff) (Max)	80ns, 50ns
Charge Injection	8pC
Channel Capacitance (CS(off), CD(off))	15pF, 15pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the ISL43110IH-T are evaluated based on the following critical parameters:

Switch Circuit Type: Must be SPST - NO topology
Multiplexer/Demultiplexer Circuit: Must be 1:1 configuration
Number of Circuits: Must be single circuit (1)
On-State Resistance (Max): Primary electrical parameter; substitutes with 10Ohm to 20Ohm resistance are functionally compatible within typical application tolerances
Voltage - Supply, Single (V+): Supply range must encompass or overlap the 2.4V ~ 12V requirement
Package / Case: SC-74A or SOT-753 packaging ensures mechanical and electrical compatibility
Mounting Type: Surface mount configuration must be maintained

Substitutes are grouped into two categories:

Direct Packaging Equivalent: ISL43110IHZ-T maintains identical electrical specifications and differs only in packaging format (Tape & Reel vs. tube).

Functional Equivalents: Parts from Nexperia (74-series logic switches) and other manufacturers that meet the core switching topology, voltage range, and package requirements, though with variations in on-state resistance, switching speed, and leakage current.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	On-State Resistance (Max)	Voltage - Supply (V+)	Switch Time Ton/Toff (Max)	Charge Injection	Leakage Current (Max)	Operating Temp	Package	Product Status	RoHS Status
ISL43110IH-T	Renesas	SPST - NO	10Ohm	2.4V ~ 12V	80ns, 50ns	8pC	1nA	-40°C ~ 85°C	5-SOT	Obsolete	Non-compliant
ISL43110IHZ-T	Renesas	SPST - NO	10Ohm	2.4V ~ 12V	80ns, 50ns	8pC	1nA	-40°C ~ 85°C	5-SOT	Obsolete	ROHS3 Compliant
74LVC1G66GV,125	Nexperia	SPST - NO	10Ohm	1.65V ~ 5.5V	4.2ns, 5ns	7.5pC	5µA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74AHC1G66GV,125	Nexperia	SPST - NO	22Ohm	2V ~ 5.5V	11ns, 11ns	—	100nA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74AHCT1G66GV,125	Nexperia	SPST - NO	22Ohm	4.5V ~ 5.5V	11ns, 11ns	—	100nA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74HC1G66GV,125	Nexperia	SPST - NO	80Ohm	2V ~ 10V	20ns, 20ns	—	1µA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74HC1G66GV-Q100H	Nexperia	SPST - NO	80Ohm	2V ~ 10V	20ns, 20ns	—	1µA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74HCT1G66GV,125	Nexperia	SPST - NO	95Ohm	4.5V ~ 5.5V	30ns, 44ns	—	1µA	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
BU4S66G2-TR	Rohm Semiconductor	SPST - NO	280Ohm	3V ~ 18V	—	—	300nA	-40°C ~ 85°C	5-SSOP	Active	ROHS3 Compliant
MAX4514CUK+T	Analog Devices/Maxim	SPST - NO	20Ohm	2V ~ 12V	150ns, 100ns	2pC	1nA	0°C ~ 70°C	SOT-23-5	Active	ROHS3 Compliant
MAX4514EUK+T	Analog Devices/Maxim	SPST - NO	20Ohm	2V ~ 12V	150ns, 100ns	2pC	1nA	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

ISL43110IHZ-T is the primary direct substitute. It maintains identical electrical specifications and operating characteristics as the ISL43110IH-T while offering ROHS3 compliance and improved supply chain availability (11,505 units in stock vs. 886 units). The only difference is packaging format (Tape & Reel). This part is recommended for designs where the original ISL43110IH-T is specified and RoHS compliance is required.

74LVC1G66GV,125 (Nexperia) provides the closest electrical match with 10Ohm on-state resistance and identical 1:1 SPST-NO topology. It offers superior switching performance (4.2ns/5ns vs. 80ns/50ns), extended operating temperature range (-40°C to 125°C), and ROHS3 compliance. However, the supply voltage range is limited to 1.65V ~ 5.5V, which does not fully encompass the original 2.4V ~ 12V specification. This part is suitable for applications operating within the 2.4V ~ 5.5V window.

74AHC1G66GV,125 and 74AHCT1G66GV,125 (Nexperia) offer active product status and ROHS3 compliance with SC-74A packaging. On-state resistance is 22Ohm (vs. 10Ohm original), which represents a 2.2x increase in resistance. These parts are suitable for applications where higher on-state resistance is acceptable and supply voltage remains within 2V ~ 5.5V (AHC) or 4.5V ~ 5.5V (AHCT).

74HC1G66GV,125 and 74HC1G66GV-Q100H (Nexperia) feature 80Ohm on-state resistance and 2V ~ 10V supply range, overlapping the original specification. The Q100H variant includes AEC-Q100 automotive qualification. These parts are suitable for applications tolerating higher on-state resistance with extended temperature operation to 125°C.

MAX4514EUK+T (Analog Devices/Maxim) matches the original 2.4V ~ 12V supply range and provides 20Ohm on-state resistance with -40°C ~ 85°C operating temperature. It offers ROHS3 compliance and active product status. Package differs (SOT-23-5 vs. 5-SOT), requiring PCB layout modification.

BU4S66G2-TR (Rohm Semiconductor) operates across 3V ~ 18V supply range with 280Ohm on-state resistance. This part is suitable only for applications where higher resistance is acceptable and supply voltage exceeds 3V. Package format is 5-SSOP.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ISL43110IH-T with ISL43110IHZ-T without any design changes?

A: Yes. ISL43110IHZ-T is electrically and functionally identical to ISL43110IH-T. The only difference is packaging format (Tape & Reel vs. tube). No circuit modifications are required. ISL43110IHZ-T offers improved RoHS compliance and better availability.

Q: What is the primary limitation when substituting with 74LVC1G66GV,125?

A: The 74LVC1G66GV,125 supply voltage range is 1.65V ~ 5.5V, which does not support the full 2.4V ~ 12V range of the original ISL43110IH-T. This substitute is only suitable for applications operating within the 2.4V ~ 5.5V window. If your design requires operation above 5.5V, this part is not compatible.

Q: Why do some substitute parts have higher on-state resistance (22Ohm, 80Ohm, 280Ohm)?

A: On-state resistance varies by device architecture and manufacturing process. Higher resistance increases voltage drop across the switch and reduces signal bandwidth. Substitutes with higher resistance are only suitable if your application tolerates increased voltage drop and does not require the original switching performance. Verify that signal levels and current requirements remain within acceptable limits.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are ROHS3 compliant. The original ISL43110IH-T is RoHS non-compliant. If RoHS compliance is a design requirement, ISL43110IHZ-T or any of the Nexperia or Maxim alternatives are suitable.

Q: Can I use MAX4514CUK+T or MAX4514EUK+T as substitutes?

A: Both MAX4514 variants match the 2.4V ~ 12V supply range and provide 20Ohm on-state resistance. However, they use SOT-23-5 packaging instead of 5-SOT (SC-74A). This requires PCB layout modification. MAX4514EUK+T supports -40°C ~ 85°C operating temperature, matching the original. MAX4514CUK+T is limited to 0°C ~ 70°C.

Q: What is the difference between 74HC1G66GV,125 and 74HC1G66GV-Q100H?

A: Both parts are electrically identical with 80Ohm on-state resistance and SC-74A packaging. The Q100H variant includes AEC-Q100 automotive qualification and is suitable for automotive applications. Select the Q100H variant if automotive-grade reliability is required.

Q: Is BU4S66G2-TR a suitable substitute?

A: BU4S66G2-TR is a functional SPST-NO switch with 5-SSOP packaging and 3V ~ 18V supply range. However, its 280Ohm on-state resistance is significantly higher than the original 10Ohm specification. This part is only suitable if your application tolerates substantially higher on-state resistance and does not require the original switching performance. Verify signal integrity and power dissipation before selection.

Q: Which substitute offers the best overall compatibility?

A: ISL43110IHZ-T provides the best compatibility as a direct electrical equivalent with identical specifications and improved RoHS compliance. If packaging change is acceptable, 74LVC1G66GV,125 offers superior switching performance and extended temperature range, provided your application operates within the 2.4V ~ 5.5V supply window.

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