SI8423BD-D-ISR Equivalent & Substitute Parts

Part Overview

The SI8423BD-D-ISR is a general purpose digital isolator manufactured by Skyworks Solutions Inc., featuring 5000Vrms isolation voltage and 2-channel unidirectional configuration in a 16-SOIC surface mount package. The device operates across a 2.7V to 5.5V supply range with a maximum data rate of 150Mbps and 20kV/µs common mode transient immunity. This component is currently in active production status with 953 units available in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component selection flexibility based on availability, lead time, or inventory considerations.

Substiute Parts

SI8423BD-D-ISR

Skyworks Solutions Inc.In Stock: 998SI8423BD-D-ISR Datasheet

Current PartRFQ

ISO7820DW

Texas InstrumentsIn Stock: 3652ISO7820DW Datasheet

SimilarRFQ

ISO7820FDW

Texas InstrumentsIn Stock: 1236ISO7820FDW Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI8423BD-D-ISR are qualified based on the following critical parameters:

• Package compatibility: 16-SOIC (0.295", 7.50mm Width) surface mount form factor
• Channel configuration: 2-channel unidirectional topology with 2 inputs on Side 1 and 0 outputs on Side 2
• Isolation technology: Capacitive coupling architecture
• Functional classification: General purpose digital isolator
• Electrical interface: 2.7V to 5.5V supply voltage compatibility

The identified substitute parts (ISO7820DW and ISO7820FDW from Texas Instruments) maintain identical package geometry, channel count, channel directionality, and isolation technology. Both substitutes provide higher isolation voltage ratings (5700Vrms versus 5000Vrms) and enhanced common mode transient immunity (100kV/µs versus 20kV/µs), representing functional upgrades within the same mechanical and electrical interface class.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status with established supply chains. The SI8423BD-D-ISR and both ISO7820 variants are functionally interchangeable within applications requiring 2-channel unidirectional digital isolation in 16-SOIC packaging.

The ISO7820DW and ISO7820FDW substitutes provide superior isolation voltage margin (5700Vrms versus 5000Vrms) and significantly higher common mode transient immunity (100kV/µs versus 20kV/µs), making them suitable for applications with more demanding noise immunity requirements. Both Texas Instruments parts carry ROHS3 compliance and REACH unaffected status.

The SI8423BD-D-ISR offers higher data rate performance (150Mbps versus 100Mbps) and lower propagation delay (11ns versus 16ns), making it preferable for applications requiring maximum signal fidelity and minimal latency.

Frequently Asked Questions (FAQ)

Q: Can ISO7820DW or ISO7820FDW directly replace SI8423BD-D-ISR in existing designs?

A: Yes. Both parts share identical 16-SOIC package geometry, 2-channel unidirectional configuration, and capacitive coupling technology. Pin-to-pin compatibility is maintained across all three devices.

Q: What are the key differences between SI8423BD-D-ISR and the ISO7820 variants?

A: The primary differences are data rate (150Mbps versus 100Mbps), propagation delay (11ns versus 16ns), and common mode transient immunity (20kV/µs versus 100kV/µs). The ISO7820 parts provide higher isolation voltage (5700Vrms versus 5000Vrms) and extended temperature range (-55°C to 125°C versus -40°C to 125°C).

Q: Are there packaging differences between ISO7820DW and ISO7820FDW?

A: Both parts use identical 16-SOIC package geometry. The primary distinction is packaging format: ISO7820DW is supplied in Tube packaging, while ISO7820FDW is also supplied in Tube packaging. Both maintain equivalent moisture sensitivity levels (MSL 2, 1 Year).

Q: Which part should be selected for high-speed applications?

A: The SI8423BD-D-ISR is recommended for applications requiring maximum data rate (150Mbps) and minimum propagation delay (11ns). The ISO7820 variants are suitable for applications where data rate of 100Mbps is sufficient.

Q: What supply voltage considerations apply to substitution?

A: The SI8423BD-D-ISR operates from 2.7V to 5.5V. The ISO7820 variants extend the lower limit to 2.25V, providing compatibility with additional low-voltage supply architectures. All three parts support standard 3.3V and 5V logic levels.