SI8430-C-IS Equivalent & Substitute Parts

Part Overview

The SI8430-C-IS is a general purpose digital isolator manufactured by Skyworks Solutions Inc., featuring 2500Vrms isolation voltage, 3 channels, and 150Mbps data rate in a 16-SOIC package. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar isolation functionality.

Substiute Parts

SI8430-C-IS

Skyworks Solutions Inc.In Stock: 1036SI8430-C-IS Datasheet

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ADUM1300ARWZ-RL

Analog Devices Inc.In Stock: 2395ADUM1300ARWZ-RL Datasheet

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ADUM1300CRWZ

Analog Devices Inc.In Stock: 8191ADUM1300CRWZ Datasheet

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ISO7330CDW

Texas InstrumentsIn Stock: 1675ISO7330CDW Datasheet

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ISO7330CDWR

Texas InstrumentsIn Stock: 2427ISO7330CDWR Datasheet

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ISO7330FCDW

Texas InstrumentsIn Stock: 2150ISO7330FCDW Datasheet

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ISO7330FCDWR

Texas InstrumentsIn Stock: 3203ISO7330FCDWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Number of Channels: 3 (all substitutes match)
• Package / Case: 16-SOIC (0.295", 7.50mm Width) (all substitutes match)
• Common Mode Transient Immunity: 25kV/µs (all substitutes match)
• Isolation Voltage: 2500Vrms minimum (substitutes meet or exceed)

Secondary Considerations:

• Data Rate: Substitutes range from 1Mbps to 150Mbps
• Technology: Capacitive or Magnetic Coupling
• Product Status: Active vs. Obsolete
• Operating Temperature Range
• Supply Voltage Range

Substitutes are divided into two groups: Analog Devices iCoupler series (magnetic coupling technology) and Texas Instruments ISO7330 series (capacitive coupling technology, matching the original technology).

Parameter Comparison

Engineering Selection Recommendations

For Capacitive Coupling Technology Match (Same as SI8430-C-IS):

The Texas Instruments ISO7330 series (ISO7330CDW, ISO7330CDWR, ISO7330FCDW, ISO7330FCDWR) maintains the same capacitive coupling technology as the original part. These devices provide 3000Vrms isolation voltage, exceeding the 2500Vrms specification. All variants are ROHS3 compliant and active products. Selection between tube (CDW, FCDW) and tape & reel (CDWR, FCDWR) packaging depends on procurement requirements. Operating temperature range matches the original (-40°C to 125°C). Data rate is reduced to 25Mbps, which is suitable for applications not requiring the full 150Mbps bandwidth of the original part.

For Higher Data Rate Performance:

The Analog Devices ADUM1300CRWZ offers 90Mbps data rate with magnetic coupling technology, providing a closer match to the original 150Mbps specification while maintaining 2500Vrms isolation and 25kV/µs CMTI. This part is ROHS3 compliant and active. Operating temperature range is -40°C to 105°C, which is 20°C lower than the original specification. The ADUM1300ARWZ-RL variant is available but operates at only 1Mbps, suitable only for low-speed applications.

For Lowest Risk Substitution:

ISO7330CDWR and ISO7330FCDWR are recommended for production environments due to active product status, full compliance certifications (ROHS3, REACH Unaffected), and matching operating temperature range. Tape & reel packaging (CDWR, FCDWR) is preferred for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SI8430-C-IS with any of these substitutes?

A: All listed substitutes share the same 16-SOIC package, 3-channel configuration, 2500Vrms minimum isolation voltage, and 25kV/µs CMTI. However, differences in data rate, technology, and operating temperature must be evaluated against your specific application requirements.

Q: What is the main difference between the Analog Devices and Texas Instruments options?

A: Analog Devices ADUM1300 series uses magnetic coupling technology with higher data rates (1Mbps to 90Mbps), while Texas Instruments ISO7330 series uses capacitive coupling technology (matching the original SI8430-C-IS) with 25Mbps data rate. The ISO7330 series also maintains the full -40°C to 125°C operating temperature range.

Q: Why do some substitutes have higher isolation voltage (3000Vrms vs. 2500Vrms)?

A: Higher isolation voltage provides additional safety margin and is backward compatible with designs requiring 2500Vrms. No circuit modifications are necessary.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (CDW, FCDW) is suitable for manual assembly and small-volume applications. Tape & reel packaging (CDWR, FCDWR) is designed for automated pick-and-place assembly in production environments.

Q: Are all substitutes RoHS compliant?

A: Yes, all active substitute parts listed are ROHS3 compliant. The original SI8430-C-IS compliance status is not specified in the available data.

Q: Which substitute has the lowest propagation delay?

A: The ADUM1300CRWZ has 32ns propagation delay, which is lower than the ISO7330 series (58ns) but higher than the original SI8430-C-IS (9.5ns). For applications requiring minimal propagation delay, the ADUM1300CRWZ is the closest available option.

Q: Can I use ADUM1300ARWZ-RL as a direct replacement?

A: ADUM1300ARWZ-RL operates at only 1Mbps, which is significantly lower than the original 150Mbps. This part is suitable only for low-speed isolation applications and should not be used if higher data rates are required.

Q: What is the moisture sensitivity level, and why does it matter?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be stored in ambient conditions before soldering. SI8430-C-IS and ADUM1300 series have MSL 1 (unlimited storage), while ISO7330 series have MSL 2 (1-year maximum). For long-term inventory, the ADUM1300 series offers better shelf-life characteristics.