SI8662ED-AS Equivalent & Substitute Parts

Part Overview

The SI8662ED-AS is an automotive-grade general purpose digital isolator manufactured by Skyworks Solutions Inc. This component provides 5000Vrms isolation across 6 channels with capacitive coupling technology, supporting unidirectional signal transmission at 150Mbps data rates. The device is qualified to AEC-Q100 automotive standards and operates across the -40°C to 125°C temperature range in a 16-SOIC surface mount package.

The SI8662ED-AS is currently in active production status with 1073 units available in inventory. Equivalent substitute parts are identified based on matching electrical isolation specifications, data rate performance, and automotive qualification requirements while accommodating variations in channel configuration.

Substiute Parts

SI8662ED-AS

Skyworks Solutions Inc.In Stock: 1146SI8662ED-AS Datasheet

Current PartRFQ

SI8642BD-AS

Skyworks Solutions Inc.In Stock: 1434SI8642BD-AS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI8662ED-AS is determined by the following critical parameters:

Primary Matching Criteria:

• Isolation voltage rating: 5000Vrms
• Data rate capability: 150Mbps minimum
• Common mode transient immunity: 35kV/µs minimum
• Supply voltage range: 2.375V to 5.5V
• Package type: 16-SOIC (0.295", 7.50mm Width)
• Automotive grade and AEC-Q100 qualification
• Capacitive coupling technology
• Operating temperature range: -40°C to 125°C

Secondary Consideration:

• Channel count and configuration may vary provided the substitute part meets or exceeds the isolation, data rate, and CMTI specifications

The SI8642BD-AS qualifies as a parametric equivalent substitute. While it provides 4 channels (2 forward / 2 reverse) compared to the 6 channels (4 forward / 2 reverse) of the SI8662ED-AS, it maintains identical electrical performance across isolation voltage, data rate, CMTI, propagation delay, and supply specifications. Both devices share the same package footprint, automotive qualification, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both the SI8662ED-AS and SI8642BD-AS are active production components with full AEC-Q100 automotive qualification. Selection between these parts depends on circuit-level channel requirements.

The SI8662ED-AS provides 6 total channels with asymmetric configuration (4 forward, 2 reverse), suitable for applications requiring multiple unidirectional signal paths with mixed directionality.

The SI8642BD-AS provides 4 total channels with symmetric configuration (2 forward, 2 reverse), suitable for applications with balanced bidirectional isolation requirements or reduced channel count specifications.

Both devices deliver identical electrical performance in isolation voltage, data rate, timing characteristics, and supply specifications. The 16-SOIC package footprint is identical, enabling direct PCB layout compatibility when channel count reduction is acceptable.

Selection should be based on the specific number and directional configuration of isolated channels required by the application circuit. No performance degradation occurs in the common electrical parameters when substituting between these parts within their respective channel count specifications.

Frequently Asked Questions (FAQ)

Q: Can SI8642BD-AS replace SI8662ED-AS in all applications?

A: The SI8642BD-AS can replace the SI8662ED-AS only when the application circuit requires 4 or fewer total channels. The electrical performance across isolation voltage, data rate, propagation delay, and CMTI specifications is identical. However, applications requiring all 6 channels of the SI8662ED-AS cannot use the 4-channel SI8642BD-AS without circuit redesign.

Q: Are the package footprints identical?

A: Yes. Both the SI8662ED-AS and SI8642BD-AS use the 16-SOIC (0.295", 7.50mm Width) package. PCB layout and land patterns are identical, allowing direct physical substitution when channel count requirements permit.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the SI8662ED-AS and SI8642BD-AS carry automotive grade designation and AEC-Q100 qualification. Both operate across the -40°C to 125°C temperature range and maintain identical moisture sensitivity levels (2A, 4 weeks).

Q: What is the difference in channel configuration between these parts?

A: The SI8662ED-AS provides 6 channels configured as 4 forward and 2 reverse. The SI8642BD-AS provides 4 channels configured as 2 forward and 2 reverse. Forward channels transmit signals in one direction; reverse channels transmit in the opposite direction. Application requirements determine which configuration is necessary.

Q: Are the electrical timing specifications identical?

A: Yes. Both parts specify identical propagation delay (13ns maximum for both tpLH and tpHL), pulse width distortion (4.5ns maximum), and rise/fall times (2.5ns typical). Data rate, isolation voltage, and CMTI specifications are also identical at 150Mbps, 5000Vrms, and 35kV/µs respectively.

Q: What supply voltage range do these parts support?

A: Both the SI8662ED-AS and SI8642BD-AS operate across the identical supply voltage range of 2.375V to 5.5V, providing compatibility with standard 3.3V and 5V logic systems.