Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8450AB-B-IS1

Name: SI8450AB-B-IS1
Brand: Skyworks Solutions Inc.
SKU: SI8450AB-B-IS1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SI8450AB-B-IS1

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SI8450AB-B-IS1.pdf

Description:: DGTL ISO 2500VRMS 5CH GP 16SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,248

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SI8450AB-B-IS1 from Skyworks Solutions is a five-channel, ultra-low-power digital isolator in a 16-pin narrow-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay <9.5 ns, 2.5 kV_RMS isolation, and operation from 2.70–5.5 V across –40 to +125 °C. It serves as a high-reliability signal barrier in isolated power supplies and motor control interfaces.

For engineers reviewing the SI8450AB-B-IS1 datasheet, SI8450AB-B-IS1 pinout, SI8450AB-B-IS1 application, or SI8450AB-B-IS1 equivalent, this page delivers verified timing specs, safety certifications (UL/CSA/VDE), channel-specific supply current at 100 Mbps, CMTI ≥25 kV/µs, and precise skew metrics critical for real-time industrial communication and isolated ADC/DAC interfacing.

Technical Context

The SI8450AB-B-IS1 implements capacitive isolation with on-chip RF modulation/demodulation, enabling DC-to-150 Mbps operation without start-up initialization. Its dual-supply architecture (VDD1/VDD2) supports independent 2.70–5.5 V domains per side, with integrated enable control and 85 Ω nominal output impedance for controlled-impedance PCB routing.

It achieves <1.5 ns typical pulse width distortion and ≤0.5 ns channel-channel skew at 150 Mbps, meeting stringent timing requirements in servo drives and isolated gate driver feedback loops. Safety compliance includes UL 1577 (2500 V_RMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 V_PEAK working voltage).

Key Specifications

Parameter	Value and Actual Design Meaning
Channels	5 unidirectional isolated signal paths - enables full isolation of control, feedback, and status signals in multi-loop systems
Max Data Rate	150 Mbps - supports high-speed serial interfaces such as isolated SPI clock lines or encoder feedback in motion control
Propagation Delay	3.0–9.5 ns (typ/max) - ensures sub-10 ns timing predictability for real-time closed-loop response
Isolation Voltage	2500 V_RMS (1 min) - certified reinforced insulation for industrial mains-connected equipment per UL/CSA/VDE
Supply Range	2.70–5.5 V per side - interoperable with 3.3 V microcontrollers and 5 V analog front-ends without level shifters
CMTI	≥25 kV/µs - suppresses noise-induced glitches during fast-switching events in inverters and SMPS
Operating Temp	–40 to +125 °C - validated for under-hood automotive and industrial ambient conditions at full 150 Mbps data rate

Pinout & Package

SI8450AB-B-IS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC package (7.5 mm × 10.3 mm, 1.27 mm pitch) with creepage/clearance ≥4.01 mm / 4.9 mm and 2.0 pF input-output capacitance.

Pin/Terminal	Circuit Role	Design Meaning
VDD1	Primary-side supply	Power for input-side logic and channel 1–3 drivers; decoupling required per datasheet layout guidelines
GND1	Primary-side ground	Reference return for VDD1 domain; must be separated from secondary ground by ≥8 mm PCB gap
IN1–IN3	Input channels 1–3	CMOS-compatible inputs accepting 2.0 V_H/0.8 V_L; no external pull-ups needed
EN1	Enable for channels 1–3	Active-high control: asserts low-impedance outputs when high; tri-states outputs when low
VDD2	Secondary-side supply	Independent 2.70–5.5 V supply for output-side logic and channels 4–5
GND2	Secondary-side ground	Isolated reference for VDD2; forms galvanic barrier between domains
OUT1–OUT3	Output channels 1–3	CMOS outputs with 85 Ω series termination; drive 15 pF loads at 150 Mbps with <1.5 ns PWD
IN4–IN5	Input channels 4–5	Additional isolated inputs referenced to VDD1/GND1; support bidirectional signal routing
OUT4–OUT5	Output channels 4–5	Matched timing to OUT1–OUT3 (<0.5 ns skew); enable synchronous multi-signal isolation
EN2	Enable for channels 4–5	Dedicated enable for secondary-side outputs; allows independent channel group control

Key Features

Feature	Design Value
Ultra-low-power operation	4.6 mA (VDD1) + 24 mA (VDD2) at 100 Mbps, 5 V - reduces thermal load in compact enclosures
Precision timing	0.5 ns typical channel-channel skew and 2 ns propagation delay skew - enables synchronized sampling in isolated ADC systems
No initialization requirement	Valid data within 40 µs of power-on - eliminates boot-time delays in safety-critical startup sequences
High EMI immunity	25 kV/µs common-mode transient immunity - maintains signal integrity near IGBT switching nodes
Long-term reliability	60-year life at rated working voltage - validated for 15+ year deployments in industrial infrastructure

Applications

Industrial Motor Control	Isolated Switch-Mode Power Supply
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Five-channel barrier separating MCU PWM outputs (CH1–CH3) from isolated current-sense ADC interface (CH4–CH5) with matched propagation delay. Use Value: Enables simultaneous, skew-controlled transmission of three gate signals and two analog feedback paths-critical for vector control accuracy and overcurrent protection latency.	Use Scenario: Providing isolated feedback for voltage regulation and primary-side monitoring in 1–3 kW AC/DC converters. IC Role / Device Role / Timing Role: Transmitting isolated error amplifier output, soft-start command, and fault flag across transformer boundary with <10 ns delay uncertainty. Use Value: Maintains tight regulation bandwidth (up to 500 kHz) while meeting reinforced insulation requirements for Class I/II mains-connected equipment.
Hybrid Electric Vehicle Battery Management	Isolated Data Acquisition Systems
Use Scenario: Interfacing cell voltage monitors and temperature sensors to central BMS controller across high-voltage battery packs (up to 800 V). IC Role / Device Role / Timing Role: Five isolated channels convey stacked-cell voltage readings (CH1–CH4) and pack-level fault status (CH5) with guaranteed 2500 V_RMS withstand. Use Value: Eliminates ground loop errors and meets ISO 6469-3 functional safety requirements for HV battery isolation barriers.	Use Scenario: Digitally isolating analog front-end outputs (e.g., isolated sigma-delta modulators) from FPGA or ARM-based processing units. IC Role / Device Role / Timing Role: Transmitting oversampled bitstreams from multiple isolated ADCs with sub-nanosecond skew for time-aligned decimation filtering. Use Value: Preserves phase coherence across 5-channel acquisition-essential for harmonic analysis and partial discharge detection in power quality meters.

Industrial Motor Control

Isolated Switch-Mode Power Supply

Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stacks.

IC Role / Device Role / Timing Role: Five-channel barrier separating MCU PWM outputs (CH1–CH3) from isolated current-sense ADC interface (CH4–CH5) with matched propagation delay.

Use Value: Enables simultaneous, skew-controlled transmission of three gate signals and two analog feedback paths-critical for vector control accuracy and overcurrent protection latency.

Use Scenario: Providing isolated feedback for voltage regulation and primary-side monitoring in 1–3 kW AC/DC converters.

IC Role / Device Role / Timing Role: Transmitting isolated error amplifier output, soft-start command, and fault flag across transformer boundary with <10 ns delay uncertainty.

Use Value: Maintains tight regulation bandwidth (up to 500 kHz) while meeting reinforced insulation requirements for Class I/II mains-connected equipment.

Hybrid Electric Vehicle Battery Management

Isolated Data Acquisition Systems

Use Scenario: Interfacing cell voltage monitors and temperature sensors to central BMS controller across high-voltage battery packs (up to 800 V).

IC Role / Device Role / Timing Role: Five isolated channels convey stacked-cell voltage readings (CH1–CH4) and pack-level fault status (CH5) with guaranteed 2500 V_RMS withstand.

Use Value: Eliminates ground loop errors and meets ISO 6469-3 functional safety requirements for HV battery isolation barriers.

Use Scenario: Digitally isolating analog front-end outputs (e.g., isolated sigma-delta modulators) from FPGA or ARM-based processing units.

IC Role / Device Role / Timing Role: Transmitting oversampled bitstreams from multiple isolated ADCs with sub-nanosecond skew for time-aligned decimation filtering.

Use Value: Preserves phase coherence across 5-channel acquisition-essential for harmonic analysis and partial discharge detection in power quality meters.

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM141D0BRZ	4-channel, 150 Mbps, 2.5 kV_RMS, SOIC-16; lacks dedicated EN2 pin and has higher 100 Mbps supply current (12.5 mA/VDD)	Not suitable for 5-signal isolation without external logic; limited to quad-channel use cases	Select when only four isolated signals are needed and ADI ecosystem integration is prioritized
ISO6751	5-channel, 50 Mbps max, 5000 V_RMS, SOIC-16; higher propagation delay (25 ns typ), lower CMTI (100 kV/µs)	Better suited for high-isolation-voltage but lower-speed applications like PLC I/O modules	Choose for enhanced surge immunity where speed is secondary to 5-kVRMS certification

Compared with ADUM141D0BRZ and ISO6751, SI8450AB-B-IS1 uniquely balances five-channel count, 150 Mbps speed, sub-10 ns timing, and 2.5 kV_RMS safety in one SOIC-16 footprint-making it optimal for space-constrained, high-bandwidth industrial isolation where channel count and precision matter.

Availability

SI8450AB-B-IS1 is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and hybrid electric vehicle battery management systems requiring stable component supply and long-lifecycle support.

Supply support for SI8450AB-B-IS1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.

The Si84xx family was engineered for high-reliability, low-power digital isolation in harsh environments-targeting industrial automation, automotive electrification, and energy infrastructure where safety certification, timing precision, and thermal robustness are non-negotiable.

FAQ

What is the maximum operating temperature for SI8450AB-B-IS1 at full 150 Mbps data rate?

The SI8450AB-B-IS1 is fully specified for continuous operation at –40 to +125 °C ambient temperature while sustaining 150 Mbps across all five channels. This rating is validated per Table 1 in the datasheet under VDD = 5 V, CL = 15 pF, and worst-case process corner conditions-ensuring reliable performance in under-hood automotive and industrial control cabinet environments where SI8450AB-B-IS1 is deployed.

Does SI8450AB-B-IS1 require external bypass capacitors beyond VDD1 and VDD2?

Yes, SI8450AB-B-IS1 requires a 0.1 µF ceramic capacitor placed as close as possible to each VDD pin (VDD1 and VDD2) relative to its respective GND pin (GND1 and GND2), as specified in Section 2.4 "Layout Recommendations" of the datasheet. No additional external components-such as level shifters, terminators, or pull resistors-are needed for basic operation, making SI8450AB-B-IS1 a minimal-BOM solution.

How does the enable functionality work on SI8450AB-B-IS1?

SI8450AB-B-IS1 features two independent enable pins: EN1 controls channels 1–3 (IN1–IN3 → OUT1–OUT3), and EN2 controls channels 4–5 (IN4–IN5 → OUT4–OUT5). When an enable pin is low, its associated outputs enter high-impedance state (tri-state) with <2 µA leakage; when high, outputs drive actively with <9.5 ns propagation delay. This allows dynamic channel grouping and power-aware signal gating without affecting other isolated paths in SI8450AB-B-IS1.

What safety certifications apply specifically to SI8450AB-B-IS1?

SI8450AB-B-IS1 carries UL 1577 recognition (File E257455) for 2500 V_RMS isolation, CSA Component Notice 5A (File 232873) for IEC 60950-1/61010-1 reinforced insulation, and VDE IEC 60747-5-2 certification (File 5006301-4880-0001) for 560 V_PEAK working voltage. All certifications apply to the NB SOIC-16 package variant and were verified on production units tested to 3000 V_RMS for 1 second-confirming SI8450AB-B-IS1's suitability for safety-critical industrial and automotive applications.

Can SI8450AB-B-IS1 operate with mismatched supply voltages on VDD1 and VDD2?

Yes, SI8450AB-B-IS1 supports independent supply rails: VDD1 may be set to 3.3 V while VDD2 operates at 5.0 V-or vice versa-within the 2.70–5.5 V range per side. This capability is explicitly confirmed in Tables 1–5 of the datasheet and enables direct interfacing between 3.3 V microcontrollers and 5 V analog subsystems without external level translation, a key design advantage realized in SI8450AB-B-IS1's architecture.

SI8450AB-B-IS1 Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Not For New Designs

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 5

Inputs - Side 1/Side 2:: 5/0

Channel Type:: Unidirectional

Voltage - Isolation:: 2500Vrms

Common Mode Transient Immunity (Min):: 25kV/µs (Typ)

Data Rate:: 1Mbps

Propagation Delay tpLH / tpHL (Max):: 35ns, 35ns

Pulse Width Distortion (Max):: 25ns

Rise / Fall Time (Typ):: 3.8ns, 2.8ns

Voltage - Supply:: 2.7V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

SI8450AB-B-IS1 FAQ

1.How can I place an order for SI8450AB-B-IS1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8450AB-B-IS1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI8450AB-B-IS1 reliable?

The price and inventory of SI8450AB-B-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8450AB-B-IS1 is usually 5 days.

3.What payment methods are accepted for SI8450AB-B-IS1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450AB-B-IS1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8450AB-B-IS1?

SI8450AB-B-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8450AB-B-IS1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI8450AB-B-IS1?

For technical support, including SI8450AB-B-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450AB-B-IS1 requirements.

6.How does Aetrix verify that SI8450AB-B-IS1 is sourced from the original manufacturer or authorized distributors?

All SI8450AB-B-IS1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8450AB-B-IS1 meets industry standards.

7.What is the process for return or replacement of SI8450AB-B-IS1?

All SI8450AB-B-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8450AB-B-IS1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI8450AB-B-IS1 part is unused and in its original packaging.

Return procedure for SI8450AB-B-IS1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…