ISO7730DBQR Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7730DBQR is a general purpose digital isolator manufactured by Texas Instruments, designed for applications requiring galvanic isolation with high common mode transient immunity. This active product operates at 3000Vrms isolation voltage with 3 channels, 100Mbps data rate, and 85kV/µs CMTI rating in a 16-SSOP surface mount package. The part is ROHS3 compliant and currently in stock with 3100 units available.

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of the digital isolator category, maintaining package compatibility and isolation voltage requirements suitable for the application.

Substiute Parts

ISO7730DBQR

Texas InstrumentsIn Stock: 3119ISO7730DBQR Datasheet

Current PartRFQ

SI8030AA-B-IU

Skyworks Solutions Inc.In Stock: 808SI8030AA-B-IU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISO7730DBQR is determined by the following critical parameters:

• Number of Channels: Must equal 3 channels
• Package Compatibility: Must be 16-SSOP form factor (0.154", 3.90mm Width)
• Technology: Must use Capacitive Coupling isolation technology
• Channel Type: Must be Unidirectional with 3 inputs on Side 1 / 0 inputs on Side 2
• Mounting Type: Must be Surface Mount
• Product Status: Must be Active

The SI8030AA-B-IU from Skyworks Solutions Inc. meets these core substitution criteria. However, this substitute operates at reduced isolation voltage (1000Vrms versus 3000Vrms), lower data rate (10Mbps versus 100Mbps), and lower CMTI rating (35kV/µs versus 85kV/µs). Substitution is valid only when application requirements permit operation within these reduced electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The ISO7730DBQR and SI8030AA-B-IU share identical package form factors and both maintain ROHS3 compliance and REACH unaffected status. Both parts are active products with current manufacturer support.

Selection between these parts depends on application isolation voltage, data rate, and noise immunity requirements. The ISO7730DBQR provides superior electrical performance with 3000Vrms isolation, 100Mbps bandwidth, and 85kV/µs CMTI. The SI8030AA-B-IU operates at 1000Vrms isolation with 10Mbps data rate and 35kV/µs CMTI.

The ISO7730DBQR supports extended operating temperature range (-55°C to 125°C) and lower supply voltage floor (2.25V), while the SI8030AA-B-IU operates from -40°C to 125°C with minimum supply voltage of 3.15V.

Frequently Asked Questions (FAQ)

Q: Can SI8030AA-B-IU replace ISO7730DBQR in all applications?

A: No. The SI8030AA-B-IU operates at reduced isolation voltage (1000Vrms), lower data rate (10Mbps), and lower CMTI (35kV/µs). Substitution is valid only when application requirements permit these reduced electrical specifications.

Q: Are the packages physically compatible?

A: Yes. Both parts use 16-SSOP (0.154", 3.90mm Width) surface mount packages with identical pin pitch and footprint compatibility.

Q: What is the minimum supply voltage difference?

A: ISO7730DBQR operates from 2.25V minimum, while SI8030AA-B-IU requires 3.15V minimum. Applications using supply voltages between 2.25V and 3.15V cannot use the SI8030AA-B-IU substitute.

Q: Do both parts meet the same compliance standards?

A: Yes. Both ISO7730DBQR and SI8030AA-B-IU are ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range difference?

A: ISO7730DBQR operates from -55°C to 125°C. SI8030AA-B-IU operates from -40°C to 125°C. Applications requiring operation below -40°C require the ISO7730DBQR.

Q: How do propagation delays compare?

A: ISO7730DBQR has maximum propagation delay of 16ns (both directions). SI8030AA-B-IU has maximum propagation delay of 65ns (both directions). Applications with timing-critical signal paths may require the faster ISO7730DBQR.