SI8284BC-ISR Equivalent & Substitute Parts

Part Overview

The SI8284BC-ISR is a digital isolator gate driver manufactured by Skyworks Solutions Inc., designed for high-voltage isolation applications. This single-channel capacitive coupling gate driver provides 5000Vrms isolation with 4A peak output current capability, suitable for automotive-grade applications requiring galvanic isolation in power switching circuits. The part maintains Active product status with full AEC-Q100 automotive qualification and multiple international approvals (CQC, CSA, UL, VDE). Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, regional availability requirements, or specific procurement specifications while maintaining electrical and mechanical compatibility.

Substiute Parts

SI8284BC-ISR

Skyworks Solutions Inc.In Stock: 1393SI8284BC-ISR Datasheet

Current PartRFQ

SI8284BC-ISR

Skyworks Solutions Inc.In Stock: 1393SI8284BC-ISR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI8284BC-ISR is determined by strict equivalence across the following critical parameters:

Isolation Technology & Voltage: Substitute parts must employ capacitive coupling technology with 5000Vrms isolation rating to maintain galvanic isolation performance in high-voltage switching applications.

Channel Configuration: Single-channel architecture is mandatory; multi-channel variants are not interchangeable due to different pin assignments and functional requirements.

Output Characteristics: Peak output current of 4A, output high/low current specifications (2.5A/3A), and output supply voltage range (2.8V ~ 5.5V) must be matched to ensure gate drive capability and compatibility with target power switches.

Timing Specifications: Propagation delay (50ns maximum for both rising and falling edges), pulse width distortion (5ns maximum), and rise/fall times (5.5ns/8.5ns typical) define signal integrity requirements and must be preserved.

Common Mode Transient Immunity: Minimum 35kV/µs CMTI performance is required for reliable operation in high dV/dt switching environments.

Package & Thermal: 24-SOIC surface mount package with 0.295" width and -40°C to 125°C operating temperature range must be maintained for PCB compatibility and thermal performance.

Automotive Compliance: AEC-Q100 qualification and approvals from CQC, CSA, UL, and VDE are mandatory for automotive-grade applications.

Based on the provided input data, the SI8284BC-ISR is listed as its own manufacturer-recommended substitute, indicating no alternative parts are specified in the current substitute list.

Parameter Comparison

Engineering Selection Recommendations

The SI8284BC-ISR maintains Active product status with full automotive-grade qualification (AEC-Q100) and comprehensive international approvals (CQC, CSA, UL, VDE). When selecting this component or evaluating alternatives, prioritize parts with identical isolation voltage (5000Vrms), matching output current specifications (4A peak), and equivalent timing performance (50ns propagation delay maximum). The 24-SOIC package format and -40°C to 125°C operating temperature range are fixed requirements for PCB compatibility and thermal management in automotive applications. Ensure any substitute part maintains the same MSL rating (3, 168 Hours) to preserve moisture sensitivity handling requirements during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SI8284BC-ISR with a different isolation voltage rating?

A: No. The 5000Vrms isolation rating is a critical parameter for this application. Substitutes must maintain this exact isolation voltage to ensure galvanic isolation performance in high-voltage switching circuits.

Q: Are multi-channel gate driver variants compatible with the SI8284BC-ISR?

A: No. The SI8284BC-ISR is a single-channel device. Multi-channel variants have different pin assignments, functional configurations, and are not pin-compatible or functionally equivalent.

Q: What happens if I use a substitute with lower peak output current?

A: Gate drive current directly affects switching speed and efficiency of power switches. The 4A peak output current specification must be maintained. Lower current ratings will result in degraded switching performance and potential circuit malfunction.

Q: Is the 24-SOIC package interchangeable with other package formats?

A: No. The 24-SOIC (0.295", 7.50mm Width) package is specific to this device. Different package formats have different pin layouts and footprints, requiring PCB redesign and are not considered direct substitutes.

Q: Does the SI8284BC-ISR require specific handling for moisture sensitivity?

A: Yes. The MSL rating of 3 (168 Hours) specifies that the component must be stored in controlled humidity conditions and used within 168 hours of bag opening. Substitute parts must maintain the same MSL rating to ensure assembly process compatibility.

Q: Can I use a non-automotive-grade equivalent in an automotive application?

A: No. The automotive grade and AEC-Q100 qualification are mandatory for automotive applications. These certifications ensure reliability, temperature stability, and compliance with automotive industry standards. Non-automotive variants are not acceptable substitutes.

Q: What is the significance of the 35kV/µs common mode transient immunity specification?

A: CMTI defines the maximum rate of voltage change the isolator can withstand without introducing errors. This specification is critical in high dV/dt switching environments. Substitute parts must meet or exceed this minimum value to maintain signal integrity.