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SI86P421BC-IS

SI86P421BC-IS

Skyworks Solutions, Inc.
Digital Isolators 3.75 kV 2-channel digital Isolator
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Overview

The SI86P421BC-IS is a dual-channel digital isolator featuring integrated isolated DC-DC power delivery in a WB SOIC-16 package. It utilizes capacitive coupling technology to provide 3.75 kVrms isolation while supporting high-speed data rates up to 150 Mbps. This component eliminates the need for a separate isolated power supply in compact digital isolation circuits.

Why Choose This Part

The integration of an isolated DC-DC converter with 43 percent peak efficiency significantly reduces PCB footprint and bill of materials complexity. It offers high transient immunity of 100 kV/microsecond and frequency dithering to minimize electromagnetic interference (EMI) in sensitive designs.

Applications

Industrial Fieldbus Isolation
Providing both data isolation and logic power for RS-485 or CAN bus transceivers in noisy factory environments.
Isolated PLC I/O Modules
Enabling safe communication between high-voltage field sensors and sensitive low-voltage controller logic.
Isolated Power Supply Feedback
Transmitting high-speed PWM or error signals across the isolation barrier in switch-mode power supplies.

Key Specifications

Type General Purpose
Data Rate 150Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power Yes
Package / Case 16-SOIC (0.295", 7.50mm Width)
Voltage - Supply 3.135V ~ 3.465V
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 16-SOIC
Pulse Width Distortion (Max) 6.7ns (Min)
Propagation Delay tpLH / tpHL (Max) 15ns, 15ns
Common Mode Transient Immunity (Min) 100kV/us

Getting Started

Designers should prioritize PCB layout for the integrated DC-DC converter, using short traces and low-ESR ceramic bypass capacitors on VDD and VDDP pins. Refer to Skyworks Solutions evaluation kits like the Si86ISOLIN-KIT for validated reference layouts and EMI mitigation techniques.

Categories

Interface ICs > Digital Isolators