ISL43144IRZ Equivalent & Substitute Parts

Part Overview

The ISL43144IRZ is a 4-circuit SPST-NO IC switch manufactured by Renesas Electronics Corporation, designed for signal routing and multiplexing applications. This part features a 25Ohm on-state resistance and operates across a supply voltage range of 2.7V to 12V (single supply) or ±2.6V to 6V (dual supply). The ISL43144IRZ is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	ISL43144IRZ
Switch Circuit Type	SPST - NO
Number of Circuits	4
On-State Resistance (Max)	25Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±2.6V ~ 6V
Switch Time (Ton, Toff) (Max)	65ns, 50ns
Charge Injection (Max)	5pC
Channel Capacitance (CS(off), CD(off))	10pF, 26pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-89dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-VQFN Exposed Pad
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ISL43144IRZ requires matching on the following critical parameters:

Primary Substitution Criteria:

Switch circuit topology (SPST - NO or SPST - NC)
Number of circuits (4-circuit configuration)
On-state resistance compatibility (≤25Ohm maximum)
Supply voltage range overlap (minimum 2.7V ~ 12V single supply)
Operating temperature range (minimum -40°C ~ 85°C)
Package compatibility (surface mount, QFN or equivalent)
RoHS3 compliance and MSL rating

Secondary Compatibility Factors:

Channel-to-channel matching tolerance
Switch timing characteristics
Leakage current specifications
Crosstalk performance

The ISL43120IHZ-T provides reduced circuit count (2 circuits) and lower on-state resistance (20Ohm) with faster switching times, suitable for applications requiring fewer channels with improved performance margins. The ADG1612BCPZ-REEL7 offers 4-circuit configuration with significantly lower on-state resistance (1.1Ohm) but operates with SPST-NC topology and requires higher minimum supply voltage (3.3V), presenting trade-offs in circuit behavior and power supply requirements.

Parameter Comparison

Parameter	ISL43144IRZ	ISL43120IHZ-T	ADG1612BCPZ-REEL7
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Analog Devices Inc.
Switch Circuit Type	SPST - NO	SPST - NO	SPST - NC
Number of Circuits	4	2	4
On-State Resistance (Max)	25Ohm	20Ohm	1.1Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	800mOhm	30mOhm
Voltage - Supply, Single (V+)	2.7V ~ 12V	2.7V ~ 12V	3.3V ~ 16V
Voltage - Supply, Dual (V±)	±2.6V ~ 6V	Not specified	±3.3V ~ 8V
Switch Time (Ton, Toff) (Max)	65ns, 50ns	35ns, 30ns	156ns, 87ns
Charge Injection (Max)	5pC	5pC	170pC
Current - Leakage (IS(off)) (Max)	100pA	100pA	300pA
Crosstalk	-89dB @ 1MHz	-105dB @ 1MHz	-110dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TA)
Package / Case	16-VQFN Exposed Pad	SOT-23-8	16-WQFN Exposed Pad, CSP
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

ISL43120IHZ-T Substitution Suitability: The ISL43120IHZ-T is an active product from Renesas Electronics Corporation with identical supply voltage range (2.7V ~ 12V) and operating temperature specifications (-40°C ~ 85°C). This part maintains SPST-NO topology and achieves lower on-state resistance (20Ohm) with faster switching performance. Primary limitation is reduced circuit count (2 circuits versus 4), requiring dual-channel designs to be implemented using two devices. Package transition from 16-VQFN to SOT-23-8 necessitates PCB layout redesign. Both parts maintain ROHS3 compliance and identical MSL ratings.

ADG1612BCPZ-REEL7 Substitution Suitability: The ADG1612BCPZ-REEL7 is an active product from Analog Devices Inc. offering 4-circuit configuration with superior on-state resistance (1.1Ohm) and extended operating temperature range (-40°C ~ 125°C). Critical differences include SPST-NC topology (normally closed versus normally open), higher minimum supply voltage requirement (3.3V versus 2.7V), and significantly higher charge injection (170pC versus 5pC). This part is suitable only for applications where SPST-NC behavior is acceptable and minimum supply voltage of 3.3V is available. Both parts maintain ROHS3 compliance and identical MSL ratings.

Frequently Asked Questions (FAQ)

Q: Can the ISL43120IHZ-T directly replace the ISL43144IRZ in a 4-circuit application?

A: No. The ISL43120IHZ-T provides only 2 circuits compared to the ISL43144IRZ's 4 circuits. Direct replacement requires either dual-device implementation or circuit redesign to operate with reduced channel count.

Q: What is the primary difference between the ISL43144IRZ and ADG1612BCPZ-REEL7?

A: The ISL43144IRZ uses SPST-NO (normally open) switching topology, while the ADG1612BCPZ-REEL7 uses SPST-NC (normally closed) topology. These are functionally opposite behaviors. Additionally, the ADG1612BCPZ-REEL7 requires minimum 3.3V supply voltage versus 2.7V for the ISL43144IRZ.

Q: Are package changes required when substituting these parts?

A: Yes. The ISL43144IRZ uses 16-VQFN packaging, the ISL43120IHZ-T uses SOT-23-8, and the ADG1612BCPZ-REEL7 uses 16-WQFN. Each package transition requires PCB layout modification and re-qualification of thermal and electrical performance.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. The ISL43144IRZ, ISL43120IHZ-T, and ADG1612BCPZ-REEL7 are all ROHS3 compliant with MSL rating of 3 (168 Hours). REACH status is unaffected for all three parts.

Q: Which substitute part offers the best on-state resistance performance?

A: The ADG1612BCPZ-REEL7 provides the lowest on-state resistance at 1.1Ohm maximum, compared to 25Ohm for the ISL43144IRZ and 20Ohm for the ISL43120IHZ-T. However, this advantage is offset by SPST-NC topology and higher minimum supply voltage requirements.

Q: What is the impact of charge injection differences between these parts?

A: The ISL43144IRZ and ISL43120IHZ-T both specify 5pC maximum charge injection, while the ADG1612BCPZ-REEL7 specifies 170pC. Higher charge injection can introduce signal distortion in precision analog applications and requires careful circuit design consideration.

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