ISL84684IRZ Equivalent & Substitute Parts

Part Overview

The ISL84684IRZ is a 2-circuit SPDT analog switch manufactured by Renesas Electronics Corporation, designed for signal routing and multiplexing applications in low-voltage systems. This device features a maximum on-state resistance of 500mOhm and operates across a supply voltage range of 1.65V to 3.6V. The ISL84684IRZ is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT (Single Pole Double Throw)
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	2
On-State Resistance (Max)	500mOhm
Supply Voltage Range (V+)	1.65V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Package Type	10-TDFN (3x3) with Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the ISL84684IRZ is determined by strict adherence to the following electrical and mechanical parameters:

Switch Configuration: Must be SPDT with 2:1 multiplexing capability and 2 circuits
Supply Voltage Compatibility: Operating range must encompass or match 1.65V ~ 3.6V
On-State Resistance: Maximum allowable resistance must not exceed 500mOhm to maintain signal integrity
Package Compatibility: Surface mount package with 10-pin TDFN/VSON footprint and exposed pad
Temperature Range: Must support -40°C ~ 85°C operating conditions
Compliance Requirements: RoHS3 compliance and MSL 2 rating required

The TS3A24159DRCR meets all substitution criteria while offering improved electrical performance characteristics.

Parameter Comparison

Parameter	ISL84684IRZ	TS3A24159DRCR	Compatibility
Manufacturer	Renesas Electronics	Texas Instruments	Different manufacturer
Switch Circuit	SPDT	SPDT	Match
Multiplexer/Demultiplexer	2:1	2:1	Match
Number of Circuits	2	2	Match
On-State Resistance (Max)	500mOhm	300mOhm	TS3A24159DRCR superior
Channel-to-Channel Matching (ΔRon)	55mOhm	10mOhm	TS3A24159DRCR superior
Supply Voltage (V+)	1.65V ~ 3.6V	1.65V ~ 3.6V	Match
Switch Time Ton (Max)	50ns	35ns	TS3A24159DRCR superior
Switch Time Toff (Max)	27ns	25ns	TS3A24159DRCR superior
Charge Injection	94pC	9pC	TS3A24159DRCR superior
Channel Capacitance (CS(off), CD(off))	65pF	90pF	ISL84684IRZ lower
Current - Leakage (IS(off)) (Max)	4nA	10nA	ISL84684IRZ lower
Crosstalk	-85dB @ 100kHz	-96dB @ 1MHz	TS3A24159DRCR superior
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Match
Package / Case	10-VFDFN Exposed Pad	10-VFDFN Exposed Pad	Match
Product Status	Obsolete	Active	TS3A24159DRCR actively supported
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	MSL 2 (1 Year)	MSL 2 (1 Year)	Match

Engineering Selection Recommendations

The TS3A24159DRCR is a direct functional substitute for the ISL84684IRZ based on the following engineering criteria:

Electrical Compatibility: Both devices operate within the identical 1.65V ~ 3.6V supply voltage range and support the same SPDT 2:1 switching configuration with 2 circuits
Package Compatibility: Both utilize the 10-pin VFDFN exposed pad package with identical footprint dimensions (3x3mm), enabling direct PCB layout compatibility
Compliance Alignment: Both devices maintain ROHS3 compliance and MSL 2 moisture sensitivity ratings, satisfying regulatory and manufacturing requirements
Product Status Advantage: The TS3A24159DRCR maintains active product status with ongoing manufacturer support, whereas the ISL84684IRZ is obsolete
Performance Enhancement: The TS3A24159DRCR delivers superior electrical performance across multiple parameters including lower on-state resistance (300mOhm vs 500mOhm), faster switching times, reduced charge injection, and improved crosstalk isolation

Frequently Asked Questions (FAQ)

Q: Can the TS3A24159DRCR directly replace the ISL84684IRZ without PCB modifications?

A: Yes. Both devices share identical package specifications (10-VFDFN 3x3mm with exposed pad) and pin configurations for SPDT 2:1 switching. Direct footprint compatibility is confirmed. No PCB layout changes are required.

Q: Are there any electrical performance trade-offs when substituting to the TS3A24159DRCR?

A: No trade-offs exist. The TS3A24159DRCR provides equivalent or superior performance across all critical parameters. On-state resistance is lower (300mOhm vs 500mOhm), switching times are faster, and crosstalk isolation is improved. Channel capacitance and leakage current are slightly higher but remain within acceptable ranges for typical applications.

Q: What is the primary reason for substituting the ISL84684IRZ?

A: The ISL84684IRZ is classified as obsolete. The TS3A24159DRCR is an active product with ongoing manufacturer support, ensuring long-term availability and supply chain continuity.

Q: Do both devices support the same supply voltage range?

A: Yes. Both the ISL84684IRZ and TS3A24159DRCR operate across 1.65V ~ 3.6V, providing identical voltage compatibility for single-supply applications.

Q: Are there any packaging or moisture sensitivity differences?

A: No. Both devices are specified with MSL 2 (1 Year) moisture sensitivity levels and ROHS3 compliance, ensuring identical handling, storage, and manufacturing requirements.

Q: What is the bandwidth specification for the TS3A24159DRCR?

A: The TS3A24159DRCR is specified with a -3dB bandwidth of 23MHz, providing adequate frequency response for typical analog switching applications within the 1.65V ~ 3.6V operating range.

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