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SI8641BB-B-IS1

SI8641BB-B-IS1

Skyworks Solutions Inc.
General Purpose Digital Isolator 2500Vrms 4 Channel 150Mbps 35kV/µs CMTI 16-SOIC (0.154", 3.90mm Width)
Active27,495 in stock
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Overview

The SI8641BB-B-IS1 is a high-speed four-channel digital isolator supporting data rates up to 150Mbps with a 2500Vrms isolation rating. It utilizes proprietary capacitive coupling technology to provide high electromagnetic immunity and low propagation delay while maintaining low power consumption across a 2.5V to 5.5V supply range.

Why Choose This Part

This device offers superior common-mode transient immunity (35kV/us) and significantly lower power consumption compared to traditional optocouplers, drawing only 5.9mA/10.3mA per side at 100Mbps. Its 150Mbps throughput and 3 unidirectional channels in one direction and 1 in the opposite (3/1 configuration) make it ideal for bidirectional bus architectures.

Applications

Industrial Fieldbus Isolation
Providing galvanic isolation for high-speed protocols like Profibus, RS-485, and CAN in noisy industrial environments.
Isolated SPI Interface
Securing high-speed SPI communication between microcontrollers and ADCs or DACs while preventing ground loops.
Battery Management Systems (BMS)
Level shifting and isolating communication signals between high-voltage battery stacks and low-voltage control electronics.
Motor Control Feedback
Isolating gate drive signals and encoder feedback in motor inverter systems to protect sensitive logic from high-voltage transients.

Key Specifications

Type General Purpose
Data Rate 150Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 16-SOIC (0.154", 3.90mm Width)
Voltage - Supply 2.5V ~ 5.5V
Number of Channels 4
Voltage - Isolation 2500Vrms
Operating Temperature -40degC ~ 125degC
Inputs - Side 1/Side 2 3/1
Rise / Fall Time (Typ) 2.5ns, 2.5ns
Supplier Device Package 16-SOIC
Pulse Width Distortion (Max) 4.5ns
Propagation Delay tpLH / tpHL (Max) 13ns, 13ns
Common Mode Transient Immunity (Min) 35kV/us

Getting Started

Place 0.1uF bypass capacitors as close as possible to the VDD1 and VDD2 pins (pins 1 and 16). Ensure a minimum PCB creepage distance is maintained under the 16-pin SOIC package to meet safety isolation requirements. For evaluation, use the Si86xxISO-KIT development board to test signal integrity and power consumption under various load conditions.

SI8641BB-B Family

Also available as: SI8641BB-B-IS

Also Consider

ADuM141E Analog Devices - Uses iCoupler transformer technology which may be preferred in specific high-temperature or magnetic immunity scenarios.
SI8641AB-B-IS1 Skyworks Solutions Inc. - Lower cost version limited to 1Mbps for applications where high-speed data transfer is not required.

Categories

Interface ICs > Digital Isolators Industrial & Automation > Industrial Communication