ISL84517IBZ Equivalent & Substitute Parts

Part Overview

The ISL84517IBZ is a single-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch manufactured by Renesas Electronics Corporation. This interface component features a 20Ω on-state resistance and is housed in an 8-SOIC surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across switching characteristics, voltage ratings, and thermal operating ranges while meeting the same packaging and compliance requirements.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC
Multiplexer/Demultiplexer Configuration	1:1
Number of Circuits	1
On-State Resistance (Max)	20Ω
Dual Supply Voltage Range (V±)	±1.5V ~ 6V
Operating Temperature Range	-40°C ~ 85°C (TA)
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ISL84517IBZ is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Switch circuit topology: SPST - NC configuration
Circuit count: Single circuit (1:1 multiplexer/demultiplexer)
On-state resistance: 20Ω maximum
Package: 8-SOIC form factor with identical 0.154" (3.90mm) width
Surface mount compatibility
Operating temperature range: -40°C to 85°C minimum
Dual supply voltage compatibility within specified range

The Texas Instruments TS12A4517D and TS12A4517DR meet all critical substitution criteria. Both parts are active products with identical switch topology, circuit configuration, on-state resistance specification, and package geometry. The dual supply voltage range of ±1V ~ 6V on the substitute parts encompasses the ISL84517IBZ requirement of ±1.5V ~ 6V, ensuring full compatibility. Both substitute parts maintain the same 8-SOIC surface mount package and comply with ROHS3 and MSL 1 requirements.

Parameter Comparison

Parameter	ISL84517IBZ (Renesas)	TS12A4517D (TI)	TS12A4517DR (TI)
Manufacturer	Renesas Electronics	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Switch Circuit	SPST - NC	SPST - NC	SPST - NC
Multiplexer Configuration	1:1	1:1	1:1
Number of Circuits	1	1	1
On-State Resistance (Max)	20Ω	20Ω	20Ω
Dual Supply Voltage (V±)	±1.5V ~ 6V	±1V ~ 6V	±1V ~ 6V
Switch Time Ton (Max)	100ns	75ns	75ns
Switch Time Toff (Max)	75ns	45ns	45ns
Charge Injection	10pC	-13pC	-13pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	5.5pF, 5.5pF	5.5pF, 5.5pF
Current - Leakage (IS(off)) Max	1nA	5nA	5nA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Option	Not specified	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

Both TS12A4517D and TS12A4517DR are direct functional equivalents to the obsolete ISL84517IBZ. Selection between the two Texas Instruments alternatives depends on procurement and assembly requirements:

TS12A4517D (Tube Packaging): Suitable for lower-volume applications, prototype development, and manual assembly processes where individual component handling is standard practice.

TS12A4517DR (Tape & Reel Packaging): Appropriate for high-volume production environments utilizing automated pick-and-place assembly equipment. The tape and reel format optimizes manufacturing throughput and reduces handling labor.

Both substitute parts are active products with established supply chains, ensuring long-term availability. The Texas Instruments TS12A4517 series demonstrates improved performance characteristics compared to the Renesas ISL84517IBZ, including faster switching times (75ns/45ns versus 100ns/75ns) and lower channel capacitance (5.5pF versus 9pF), while maintaining full electrical compatibility within the specified operating parameters. All parts maintain ROHS3 compliance and MSL 1 moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q: Can TS12A4517D and TS12A4517DR be used interchangeably with ISL84517IBZ?

A: Yes. Both Texas Instruments parts are electrically and mechanically equivalent. The difference is packaging format: TS12A4517D uses tube packaging for manual handling, while TS12A4517DR uses tape and reel for automated assembly. Select based on your manufacturing process requirements.

Q: What is the primary reason for substituting ISL84517IBZ?

A: The ISL84517IBZ is classified as obsolete. The TS12A4517D and TS12A4517DR are active products from Texas Instruments with established supply availability and long-term production support.

Q: Are the supply voltage ranges compatible?

A: Yes. The ISL84517IBZ operates at ±1.5V ~ 6V dual supply. The substitute parts operate at ±1V ~ 6V, which encompasses the original specification. The wider lower voltage range of the substitutes provides additional design flexibility.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All three parts use the 8-SOIC package with identical dimensions (0.154" width, 3.90mm). PCB layout and footprint files require no modification.

Q: What are the performance differences between ISL84517IBZ and the substitute parts?

A: The Texas Instruments substitutes offer faster switching times and lower channel capacitance. Ton decreases from 100ns to 75ns, Toff decreases from 75ns to 45ns, and channel capacitance reduces from 9pF to 5.5pF. These improvements are beneficial for high-speed switching applications and do not create compatibility issues with existing designs.

Q: Are compliance certifications maintained with the substitute parts?

A: Yes. Both TS12A4517D and TS12A4517DR maintain ROHS3 compliance and MSL 1 moisture sensitivity classification, matching the original ISL84517IBZ specifications.

Q: Which substitute part should I select for new designs?

A: For new designs, either part is suitable. Use TS12A4517D for manual assembly or prototype work. Use TS12A4517DR for production volumes utilizing automated assembly equipment.

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