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Si8621BC-B-IS

Si8621BC-B-IS

MPN: SI8621BC-B-IS
Skyworks Solutions Inc.
General Purpose Digital Isolator 3750Vrms 2 Channel 150Mbps 35kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Active91,420 in stock
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Overview

The Si8621BC-B-IS is a high-performance, two-channel digital isolator offering up to 3750Vrms isolation using Skyworks' proprietary capacitive coupling technology. It supports data rates up to 150Mbps with a unidirectional channel configuration (1/1), making it suitable for isolating high-speed serial buses like SPI, UART, and CAN. This industrial-grade device operates from 2.5V to 5.5V and provides high electromagnetic immunity with 35kV/us common-mode transient immunity.

Why Choose This Part

The device offers industry-leading 150Mbps throughput with minimal propagation delay and extremely low power consumption of approximately 4.4mA per channel at 100Mbps. Its capacitive isolation technology provides superior reliability and longer service life compared to optocouplers, while the 35kV/us CMTI ensures robust operation in electrically noisy environments.

Applications

Industrial Fieldbus Isolation
Protects sensitive microcontrollers from high-voltage transients in RS-485, CAN, and Profibus networks.
Isolated SPI/UART Communication
Provides high-speed data isolation between a host processor and peripherals in noisy power electronics environments.
Battery Management Systems (BMS)
Safely bridges communication across different voltage domains in multi-cell battery stacks.
Motor Control Feedback
Isolates PWM signals and encoder feedback in motor drive circuits to prevent ground loops.

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 3750Vrms
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

To evaluate this part, use the Si86xxISO-KIT evaluation board which allows for quick testing of isolation performance and signal integrity. Ensure that bypass capacitors of 0.1uF are placed as close as possible to the VDD1 and VDD2 pins to maintain stability during high-speed switching.

Also Consider

MAX14931 Maxim Integrated - Provides a similar 2-channel footprint with robust 150Mbps performance and wide supply voltage range.