ISO7841FDW Equivalent & Substitute Parts

Part Overview

The ISO7841FDW is a General Purpose Digital Isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage, 4 channels, and 100Mbps data rate in a 16-SOIC package. This device is Active in product status and complies with ROHS3 and REACH standards. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component sourcing flexibility while maintaining circuit performance specifications.

Substiute Parts

ISO7841FDW

Texas InstrumentsIn Stock: 3347ISO7841FDW Datasheet

Current PartRFQ

ISO7841DW

Texas InstrumentsIn Stock: 2219ISO7841DW Datasheet

Parametric EquivalentRFQ

SI8641BD-B-IS2

Skyworks Solutions Inc.In Stock: 2974SI8641BD-B-IS2 Datasheet

MFR RecommendedRFQ

SI8641BD-B-ISR

Skyworks Solutions Inc.In Stock: 95503SI8641BD-B-ISR Datasheet

MFR RecommendedRFQ

SI8641ED-B-IS2

Skyworks Solutions Inc.In Stock: 1126SI8641ED-B-IS2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

• Number of Channels: 4
• Channel Type: Unidirectional
• Inputs - Side 1/Side 2: 3/1
• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Technology: Capacitive Coupling
• Type: General Purpose
• Isolated Power: No

Acceptable Parameter Variations:

• Voltage - Isolation: 5000Vrms to 5700Vrms (maintains isolation performance)
• Data Rate: 100Mbps to 150Mbps (higher rates are backward compatible)
• Common Mode Transient Immunity: 35kV/µs to 100kV/µs (performance envelope)
• Propagation Delay: 13ns to 16ns (timing specifications)
• Operating Temperature: -40°C to -55°C minimum; 125°C maximum
• Voltage - Supply: 2.25V to 2.5V minimum; 5.5V maximum

Substitute Parts Identified:

• ISO7841DW (Texas Instruments) - Parametric Equivalent
• SI8641BD-B-IS2 (Skyworks Solutions Inc.) - MFR Recommended
• SI8641BD-B-ISR (Skyworks Solutions Inc.) - MFR Recommended
• SI8641ED-B-IS2 (Skyworks Solutions Inc.) - MFR Recommended

Parameter Comparison

Engineering Selection Recommendations

ISO7841DW (Texas Instruments) - Direct parametric equivalent with identical electrical specifications and operating temperature range. Recommended for applications requiring exact performance match within the same manufacturer ecosystem. Both devices maintain 5700Vrms isolation and 100kV/µs CMTI.

SI8641BD-B-IS2 (Skyworks Solutions Inc.) - Suitable for applications where 5000Vrms isolation is acceptable. Offers improved data rate (150Mbps) and faster propagation delay (13ns). Operating temperature minimum of -40°C is acceptable for standard industrial applications. ROHS3 compliant with MSL 3 rating.

SI8641BD-B-ISR (Skyworks Solutions Inc.) - Recommended for high-volume production due to superior inventory availability (95,400 Pcs). Packaging in Cut Tape & Digi-Reel format supports automated assembly. CMTI of 35kV/µs is acceptable for general-purpose isolation applications. MSL 2A rating provides improved moisture handling for standard storage conditions.

SI8641ED-B-IS2 (Skyworks Solutions Inc.) - Functionally equivalent to SI8641BD-B-IS2 with identical electrical performance. Selection between these Skyworks variants depends on packaging requirements and inventory availability.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original ISO7841FDW.

Frequently Asked Questions (FAQ)

Q: Can SI8641 series parts directly replace ISO7841FDW in all applications?

A: SI8641 series parts are functionally compatible when 5000Vrms isolation meets application requirements. The reduced isolation voltage (5000Vrms vs. 5700Vrms) and lower CMTI (35kV/µs to 50kV/µs vs. 100kV/µs) must be evaluated against circuit specifications. All other parameters including channel count, package, and data rate support direct substitution.

Q: What is the difference between SI8641BD-B-IS2 and SI8641BD-B-ISR?

A: Both parts are electrically identical. SI8641BD-B-IS2 is supplied in Tube packaging, while SI8641BD-B-ISR is supplied in Cut Tape & Digi-Reel format. The ISR variant offers significantly higher inventory (95,400 Pcs vs. 2,904 Pcs) and is optimized for automated assembly processes. MSL ratings differ: IS2 is MSL 3 (168 Hours), ISR is MSL 2A (4 Weeks).

Q: Are there operating temperature restrictions when substituting with Skyworks parts?

A: Skyworks SI8641 series parts operate from -40°C to 125°C, compared to ISO7841FDW range of -55°C to 125°C. Applications requiring operation below -40°C must use ISO7841FDW or ISO7841DW. Standard industrial and commercial applications within -40°C to 125°C range are unaffected.

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

A: Yes. All parts use 16-SOIC (0.295", 7.50mm Width) package with identical pin configuration and mounting type (Surface Mount). PCB layout and footprint remain unchanged across all listed substitutes.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original ISO7841FDW. ECCN and HTSUS classifications are identical across all parts.