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Si8621BB-B-IS

Si8621BB-B-IS

MPN: SI8621BB-B-IS
Skyworks Solutions Inc.
General Purpose Digital Isolator 2500Vrms 2 Channel 150Mbps 35kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Active22,640 in stock
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Overview

The Si8621BB-B-IS is a high-performance, two-channel digital isolator based on proprietary capacitive coupling technology. It provides 2500Vrms isolation and supports data rates up to 150Mbps with one forward and one reverse channel. This device is designed to replace optocouplers in demanding industrial environments where high reliability and low power consumption are required.

Why Choose This Part

The Si8621BB-B-IS offers superior 35kV/us common-mode transient immunity and a low propagation delay of 13ns, ensuring high signal integrity at 150Mbps. Its low power profile of 1.9mA per channel at 1Mbps significantly reduces thermal load compared to traditional opto-isolators.

Applications

Industrial Fieldbus Isolation
Used to isolate RS-485, CAN, or Modbus signals to prevent ground loops and protect sensitive logic from high-voltage transients.
Isolated SPI/UART Communication
Provides high-speed data isolation between microcontrollers and peripheral sensors or motor controllers in noisy environments.
Isolated Power Supply Feedback
Integrates into the feedback loop of switch-mode power supplies to maintain galvanic isolation while passing control signals.

Key Specifications

Type General Purpose
Data Rate 150Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 2.5V ~ 5.5V
Number of Channels 2
Voltage - Isolation 2500Vrms
Operating Temperature -40degC ~ 125degC
Inputs - Side 1/Side 2 1/1
Rise / Fall Time (Typ) 2.5ns, 2.5ns
Supplier Device Package 8-SOIC
Pulse Width Distortion (Max) 4.5ns
Propagation Delay tpLH / tpHL (Max) 13ns, 13ns
Common Mode Transient Immunity (Min) 35kV/us

Getting Started

Place the SOIC-8 package across a 4mm isolation gap on your PCB, ensuring clear separation between Side 1 and Side 2 ground planes. Connect VDD1 and VDD2 to independent supplies ranging from 2.5V to 5.5V, and bypass each supply pin with a 0.1uF capacitor as close to the pins as possible.

Also Consider

MAX14931FASE+ Maxim Integrated - Provides a similar 1/1 channel configuration with a very high 150Mbps throughput and 2.75kVrms rating.