ISL43L120IRZ Equivalent & Substitute Parts

Part Overview

The ISL43L120IRZ is a 2-circuit IC switch manufactured by Renesas Electronics Corporation, configured as SPST-NO (Single Pole Single Throw - Normally Open) with 1:1 multiplexer/demultiplexer functionality. This component features a maximum on-state resistance of 250mOhm and operates across a single supply voltage range of 1.65V to 3.6V. The device is housed in an 8-TDFN (3x3) package with exposed pad for surface mount applications.

The ISL43L120IRZ is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this interface switch.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISL43L120IRZ
Manufacturer	Renesas Electronics Corporation
Switch Circuit Type	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	2
On-State Resistance (Max)	250mOhm
Channel-to-Channel Matching (ΔRon)	5mOhm
Voltage - Supply, Single (V+)	1.65V ~ 3.6V
Switch Time (Ton, Toff) (Max)	25ns, 25ns
Charge Injection	-125pC
Channel Capacitance (CS(off), CD(off))	182pF, 182pF
Current - Leakage (IS(off)) (Max)	3nA
Crosstalk	-94dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-WDFN Exposed Pad
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ISL43L120IRZ is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit topology (SPST-NO vs. SPDT)
Multiplexer/demultiplexer configuration (1:1 vs. 2:1)
Number of circuits (2 vs. 1)
On-state resistance compatibility (250mOhm vs. 360mOhm)
Supply voltage range overlap (1.65V ~ 3.6V vs. 1.1V ~ 4.5V)
Operating temperature range (-40°C ~ 85°C)
Package form factor and pin count (8-TDFN vs. SC-70-6)
RoHS and compliance certifications

The ISL43L210IHZ-T represents a functional alternative within the Renesas ISL43L2xx family. However, this substitute exhibits differences in circuit topology (SPDT vs. SPST-NO), multiplexer configuration (2:1 vs. 1:1), circuit count (1 vs. 2), on-state resistance (360mOhm vs. 250mOhm), and package type (SC-70-6 vs. 8-TDFN). These differences require careful evaluation against specific application requirements.

Parameter Comparison

Parameter	ISL43L120IRZ (Main)	ISL43L210IHZ-T (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Switch Circuit Type	SPST - NO	SPDT
Multiplexer/Demultiplexer Circuit	1:1	2:1
Number of Circuits	2	1
On-State Resistance (Max)	250mOhm	360mOhm (Typ)
Channel-to-Channel Matching (ΔRon)	5mOhm	2mOhm
Voltage - Supply, Single (V+)	1.65V ~ 3.6V	1.1V ~ 4.5V
Switch Time (Ton, Toff) (Max)	25ns, 25ns	15ns, 10ns
Charge Injection	-125pC	25pC
Channel Capacitance (CS(off), CD(off))	182pF, 182pF	40pF
Current - Leakage (IS(off)) (Max)	3nA	30nA
Crosstalk	-94dB @ 100kHz	-70dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-WDFN Exposed Pad	6-TSSOP, SC-88, SOT-363
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	2 (1 Year)

Engineering Selection Recommendations

Product Status Consideration: The ISL43L120IRZ is obsolete, while the ISL43L210IHZ-T is active. Selection of an active product ensures ongoing availability and manufacturing support.

Compliance and Certifications: Both parts maintain ROHS3 compliance and are classified as REACH Unaffected with EAR99 ECCN designation. Both are suitable for applications requiring regulatory compliance in these areas.

Substitution Feasibility: Direct substitution of the ISL43L210IHZ-T for the ISL43L120IRZ requires circuit-level evaluation. The substitute differs in switch topology, circuit configuration, and package form factor. Applications designed specifically for the ISL43L120IRZ's SPST-NO 1:1 configuration with 2 circuits may require redesign to accommodate the ISL43L210IHZ-T's SPDT 2:1 single-circuit topology.

Frequently Asked Questions (FAQ)

Q: Can the ISL43L210IHZ-T directly replace the ISL43L120IRZ in existing designs?

A: Direct replacement is not recommended without circuit redesign. The ISL43L210IHZ-T operates as a SPDT 2:1 switch with a single circuit, whereas the ISL43L120IRZ is a SPST-NO 1:1 switch with two circuits. Pin configuration and functional behavior differ significantly.

Q: What are the key differences in electrical performance?

A: The ISL43L210IHZ-T exhibits higher on-state resistance (360mOhm typical vs. 250mOhm maximum), higher leakage current (30nA vs. 3nA), and lower crosstalk performance (-70dB vs. -94dB @ 100kHz). The substitute offers faster switching times (15ns/10ns vs. 25ns/25ns) and lower charge injection (25pC vs. -125pC).

Q: Are the package types compatible?

A: No. The ISL43L120IRZ uses an 8-TDFN (3x3) package, while the ISL43L210IHZ-T uses a 6-TSSOP (SC-70-6) package. PCB layout and footprint modifications are required for substitution.

Q: What is the supply voltage compatibility?

A: The ISL43L120IRZ operates at 1.65V ~ 3.6V, while the ISL43L210IHZ-T operates at 1.1V ~ 4.5V. The substitute supports a wider voltage range and is compatible with applications using the original part's supply voltage specifications.

Q: Are both parts suitable for the same temperature range?

A: Yes. Both parts operate across -40°C to 85°C (TA), making them compatible for applications with identical temperature requirements.

Q: What moisture sensitivity considerations apply?

A: The ISL43L120IRZ has MSL 1 (unlimited shelf life), while the ISL43L210IHZ-T has MSL 2 (1-year shelf life). Storage and handling procedures differ accordingly.

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