SI88441BC-ISR Equivalent & Substitute Parts

Part Overview

The SI88441BC-ISR is a general purpose digital isolator manufactured by Skyworks Solutions Inc. featuring 5000Vrms isolation voltage, 4 channels with 3/1 input configuration, and 100Mbps data rate in a 20-SOIC package. The device utilizes capacitive coupling technology and operates across -40°C to 125°C with supply voltage range of 3V to 5.5V. This part is actively produced and ROHS3 compliant. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of the digital isolator category.

Substiute Parts

SI88441BC-ISR

Skyworks Solutions Inc.In Stock: 1131SI88441BC-ISR Datasheet

Current PartRFQ

MAX14131FAEE+

Analog Devices Inc./Maxim IntegratedIn Stock: 32188MAX14131FAEE+ Datasheet

SimilarRFQ

MAX14131FAEE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3664MAX14131FAEE+T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI88441BC-ISR are identified based on the following critical parameters that define functional equivalence within the digital isolator category:

Matching Criteria:

• Technology: Capacitive Coupling
• Type: General Purpose
• Number of Channels: 4
• Channel Configuration: Unidirectional with 3/1 input distribution
• Operating Temperature Range: -40°C ~ 125°C
• Supply Voltage Compatibility: Overlapping range with 3V ~ 5.5V
• Product Status: Active
• RoHS Compliance: ROHS3 Compliant
• Mounting Type: Surface Mount

Allowed Parameter Variations: Substitutes may differ in isolation voltage (provided minimum meets application requirements), data rate, CMTI, propagation delay, package form factor, and MSL rating, as these parameters do not affect the core 4-channel unidirectional isolation function when the substitute meets or exceeds the electrical performance envelope of the application.

The MAX14131FAEE+ and MAX14131FAEE+T are qualified substitutes based on matching core isolation architecture, channel count, configuration, and compliance status, despite differences in package type and certain performance metrics.

Parameter Comparison

Engineering Selection Recommendations

Selection between SI88441BC-ISR and substitute parts MAX14131FAEE+ or MAX14131FAEE+T is determined by application-specific isolation voltage requirements and package constraints.

SI88441BC-ISR is the primary selection for applications requiring 5000Vrms isolation voltage. The device is actively produced, ROHS3 compliant, and available in high inventory (1120 pcs). The 20-SOIC package provides standard PCB layout compatibility for this form factor.

MAX14131FAEE+ and MAX14131FAEE+T are functionally equivalent substitutes for applications where 1000Vrms isolation voltage is sufficient. Both variants are actively produced and ROHS3 compliant. The MAX14131FAEE+ is supplied in Tube packaging, while MAX14131FAEE+T is supplied in Cut Tape & Digi-Reel® format. Both feature improved MSL rating (1 vs. 3), lower propagation delay, and reduced pulse width distortion. The 16-SSOP package is more compact than the 20-SOIC, requiring PCB layout redesign. Inventory availability is higher for both variants (32100 pcs and 3614 pcs respectively).

All three parts share identical operating temperature range (-40°C ~ 125°C), supply voltage compatibility (overlapping 3V ~ 5.5V range), and core isolation architecture. Selection should prioritize isolation voltage requirement as the primary differentiator.

Frequently Asked Questions (FAQ)

Q: Can MAX14131FAEE+ replace SI88441BC-ISR in all applications?

A: Substitution is valid only when the application isolation voltage requirement is 1000Vrms or lower. The MAX14131FAEE+ provides 1000Vrms isolation versus the SI88441BC-ISR's 5000Vrms. If the design requires 5000Vrms isolation, the SI88441BC-ISR is the only qualified part among these options.

Q: What is the difference between MAX14131FAEE+ and MAX14131FAEE+T?

A: Both parts are electrically identical with matching electrical specifications. The difference is packaging format: MAX14131FAEE+ is supplied in Tube, while MAX14131FAEE+T is supplied in Cut Tape & Digi-Reel® format. Selection depends on assembly process requirements and inventory management preferences.

Q: Are there PCB layout considerations when switching from SI88441BC-ISR to MAX14131FAEE+?

A: Yes. The SI88441BC-ISR uses 20-SOIC (0.295", 7.50mm width) while MAX14131FAEE+ uses 16-SSOP (0.154", 3.90mm width). The different package footprints require PCB layout redesign. Pin count differs (20 vs. 16), necessitating schematic and layout verification.

Q: Do all three parts meet RoHS compliance?

A: Yes. SI88441BC-ISR, MAX14131FAEE+, and MAX14131FAEE+T are all ROHS3 compliant.

Q: What is the moisture sensitivity difference between these parts?

A: SI88441BC-ISR has MSL 3 (168 hours), while both MAX14131 variants have MSL 1 (Unlimited). Lower MSL ratings indicate better moisture tolerance and longer shelf life without baking requirements.

Q: Which part has the fastest propagation delay?

A: MAX14131FAEE+ and MAX14131FAEE+T both feature propagation delay of 7.5ns (tpLH) and 7.4ns (tpHL), compared to SI88441BC-ISR at 18ns and 23ns respectively. The MAX14131 variants provide faster signal propagation.