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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8440BB-C-ISR

Name: SI8440BB-C-ISR
Brand: Skyworks Solutions Inc.
SKU: SI8440BB-C-ISR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8440BB-C-ISR

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: SI8440BB-C-ISR.pdf

Description:: IC ISOLATOR 4CH 5.5V 16-SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI8440BB-C-ISR from Silicon Labs is a quad-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate, <9.5 ns worst-case propagation delay, and 2.5 kV_RMS isolation. It operates across 2.70–5.5 V supply rails and delivers <6 mA per channel at 100 Mbps (5 V), targeting isolated communication in motor control and industrial power supplies.

For engineers reviewing the SI8440BB-C-ISR datasheet, SI8440BB-C-ISR pinout, SI8440BB-C-ISR application, or SI8440BB-C-ISR equivalent, this page provides verified timing specs, safety certifications (UL/CSA/VDE), thermal derating curves, and precise channel-to-channel skew (≤1.8 ns) critical for high-speed isolated gate drive and ADC interface design.

Technical Context

The SI8440BB-C-ISR implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic timing. Its architecture supports independent VDD1/VDD2 rails (2.70–5.5 V), enabling level-shifting between 3.3 V and 5 V domains without external logic.

All four channels feature matched propagation delay (typ. 6.0 ns), ≤1.5 ns pulse width distortion, and 25 kV/µs common-mode transient immunity (CMTI). The device is AEC-Q100 qualified and rated for –40 to +125 °C operation at full 150 Mbps data rate with 15 pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - enables real-time feedback in servo drives and fast isolated ADC sampling.
Propagation Delay	3.0–9.5 ns (max) - ensures sub-10 ns timing precision for synchronous PWM gate driving.
Channel-Channel Skew	≤1.8 ns (max) - guarantees tight timing alignment across all four isolated signals in multi-phase inverters.
Supply Voltage Range	2.70–5.5 V per side - supports interoperability between 3.3 V controllers and 5 V analog/power domains.
Isolation Rating	2500 V_RMS (1 min) - meets reinforced insulation requirements for IEC 61010-1 and UL 1577 safety compliance.
CMTI	25 kV/µs - sustains reliable operation in high-dV/dt environments like SiC/GaN power stages.
Power @ 100 Mbps	<6 mA per channel at 5 V - reduces thermal load in densely packed isolated DC-DC controllers.

Pinout & Package

SI8440BB-C-ISR is housed in a 16-pin wide-body SOIC package (package outline per Rev. 1.7, page 28), providing 8.0 mm nominal creepage and clearance for reinforced insulation. Pin functions are symmetrically arranged across two isolated sides (pins 1–8: side 1; pins 9–16: side 2).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Input Channels A1–A4	Digital inputs referenced to VDD1; accept 2.0 V min VIH and 0.8 V max VIL.
5, 6, 7, 8	VDD1, GND1, EN1, NC	VDD1 powers side 1; EN1 globally enables/disables all four outputs (low = tri-state).
9, 10, 11, 12	Output Channels B1–B4	CMOS-compatible outputs referenced to VDD2; VOH ≥ VDD2–0.4 V, VOL ≤ 0.4 V.
13, 14, 15, 16	VDD2, GND2, EN2, NC	VDD2 powers side 2; EN2 controls side-2 outputs independently; NC pins are no-connect.

Key Features

Feature	Design Value
RF-based isolation barrier	Eliminates LED aging and temperature drift issues of optocouplers; enables stable timing over –40 to +125 °C.
No start-up initialization	Valid output data within 40 µs of power application - simplifies system boot sequencing in PLCs and inverters.
Independent enable control	EN1 and EN2 allow selective tri-state of each side - supports dynamic power gating in isolated ADC/DAC interfaces.
85 Ω nominal output impedance	Enables direct connection to 50–100 Ω PCB traces without external termination - reduces BOM count in high-speed links.
60-year life at rated voltage	Guaranteed reliability under continuous 2.5 kV_RMS stress - validated per VDE 0884-2 and IEC 60747-5-2.

Applications

Motor Control	Isolated Switch-Mode Power Supply
Use Scenario: Isolating gate-drive signals for three-phase IGBT/SiC modules in servo drives and EV traction inverters. IC Role / Device Role / Timing Role: Quad-channel isolator delivering synchronized, low-skew PWM signals to high-side and low-side drivers. Use Value: ≤1.8 ns channel-to-channel skew ensures precise dead-time control; 25 kV/µs CMTI prevents false triggering during fast dV/dt switching.	Use Scenario: Providing feedback isolation for secondary-side voltage/current sensing in isolated DC-DC converters. IC Role / Device Role / Timing Role: Transmitting ADC output or error amplifier signals across isolation barrier with minimal latency. Use Value: <9.5 ns propagation delay preserves loop bandwidth; 2.5 kV_RMS rating satisfies reinforced insulation requirements per IEC 62368-1.
Industrial Automation	Hybrid Electric Vehicle Systems
Use Scenario: Isolating digital I/O and fieldbus signals (e.g., RS-485, CAN FD transceivers) in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional signal isolation for control and status lines between microcontroller and field-side peripherals. Use Value: Dual enable pins (EN1/EN2) support hot-swap capability; AEC-Q100 qualification ensures automotive-grade robustness.	Use Scenario: Isolating battery management system (BMS) cell monitoring signals from high-voltage traction battery stacks. IC Role / Device Role / Timing Role: Transmitting isolated voltage/temperature telemetry from 48–800 V battery modules to central controller. Use Value: 8.0 mm creepage/clearance meets IEC 61851-23 requirements for EV charging systems; 60-year lifetime supports 15+ year vehicle service life.

Motor Control

Isolated Switch-Mode Power Supply

Use Scenario: Isolating gate-drive signals for three-phase IGBT/SiC modules in servo drives and EV traction inverters.

IC Role / Device Role / Timing Role: Quad-channel isolator delivering synchronized, low-skew PWM signals to high-side and low-side drivers.

Use Value: ≤1.8 ns channel-to-channel skew ensures precise dead-time control; 25 kV/µs CMTI prevents false triggering during fast dV/dt switching.

Use Scenario: Providing feedback isolation for secondary-side voltage/current sensing in isolated DC-DC converters.

IC Role / Device Role / Timing Role: Transmitting ADC output or error amplifier signals across isolation barrier with minimal latency.

Use Value: <9.5 ns propagation delay preserves loop bandwidth; 2.5 kV_RMS rating satisfies reinforced insulation requirements per IEC 62368-1.

Industrial Automation

Hybrid Electric Vehicle Systems

Use Scenario: Isolating digital I/O and fieldbus signals (e.g., RS-485, CAN FD transceivers) in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional signal isolation for control and status lines between microcontroller and field-side peripherals.

Use Value: Dual enable pins (EN1/EN2) support hot-swap capability; AEC-Q100 qualification ensures automotive-grade robustness.

Use Scenario: Isolating battery management system (BMS) cell monitoring signals from high-voltage traction battery stacks.

IC Role / Device Role / Timing Role: Transmitting isolated voltage/temperature telemetry from 48–800 V battery modules to central controller.

Use Value: 8.0 mm creepage/clearance meets IEC 61851-23 requirements for EV charging systems; 60-year lifetime supports 15+ year vehicle service life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM2401ARWZ	100 Mbps max data rate; 25 ns max propagation delay; 2.5 kV_RMS isolation; SOIC-16 narrow body (4.01 mm creepage).	Limited to 100 Mbps - unsuitable for >100 MHz feedback loops in SiC inverters.	Choose when lower speed and narrower package are acceptable; verify creepage compliance for end-equipment standards.
ISO6741QDWR	50 Mbps max data rate; 25 ns max propagation delay; 5 kV_RMS isolation; SOIC-16 wide body (8.0 mm creepage).	Half the data rate and higher power consumption (>10 mA/channel @ 100 Mbps) - increases thermal load in compact designs.	Prefer only where 5 kV_RMS is mandated and speed is not critical; confirm CMTI (25 kV/µs) matches system dV/dt requirements.

Compared with ADUM2401ARWZ and ISO6741QDWR, SI8440BB-C-ISR uniquely delivers 150 Mbps throughput with ≤9.5 ns delay and 25 kV/µs CMTI in a safety-certified wide-body SOIC - making it optimal for next-generation high-frequency isolated gate drivers and BMS telemetry.

Availability

SI8440BB-C-ISR is available at Aetrix Electronics and suitable for motor control, isolated switch-mode power supplies, and hybrid electric vehicle systems requiring stable component supply and long-term lifecycle support.

Supply support for SI8440BB-C-ISR 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

Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and wired connectivity solutions for IoT, industrial, and automotive markets.

The Si84xx family was designed specifically for high-reliability, high-speed digital isolation in safety-critical power electronics - replacing optocouplers with CMOS-based RF isolation that maintains timing stability across temperature and lifetime.

FAQ

What is the maximum operating temperature for SI8440BB-C-ISR at 150 Mbps?

The SI8440BB-C-ISR is fully specified for continuous operation at –40 to +125 °C ambient temperature while sustaining 150 Mbps data rate with 15 pF load. This rating is validated per Table 1 and Figure 3 in Rev. 1.7, and applies to both wide-body SOIC thermal profiles and AEC-Q100 qualification.

Does SI8440BB-C-ISR require external bypass capacitors?

Yes - SI8440BB-C-ISR requires 0.1 µF ceramic bypass capacitors placed as close as possible to each VDD pin (pins 5 and 13) and connected to their respective ground pins (pins 6 and 14). This is explicitly stated in the "Description" section of the datasheet and confirmed in Section 2.4 (Layout Recommendations).

How does the enable functionality work on SI8440BB-C-ISR?

SI8440BB-C-ISR features two independent enable inputs: EN1 (pin 7) controls outputs B1–B4, and EN2 (pin 15) controls inputs A1–A4. When an enable pin is low, its associated side enters tri-state; when high, normal signal transmission resumes. Timing is defined in Figure 1: enable-to-data valid is ≤8.0 ns.

Is SI8440BB-C-ISR pin-compatible with other Si844x variants?

Yes - SI8440BB-C-ISR shares identical pinout and package (16-pin wide-body SOIC) with all Si8440/41/42/45 family members. However, functional differences exist: SI8440 supports bidirectional channels, while SI8441/42 offer unidirectional configurations. Always verify directionality and enable logic in schematic capture.

What safety certifications apply to SI8440BB-C-ISR?

SI8440BB-C-ISR carries UL 1577 (2500 V_RMS), CSA Component Acceptance Notice 5A (IEC 61010-1/60950-1), and VDE IEC 60747-5-2 (560 V_PEAK) certifications. These are documented in Tables 6 and 7 of Rev. 1.7 and apply to the 2.5 kV_RMS rated wide-body SOIC variant.

SI8440BB-C-ISR Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 4

Inputs - Side 1/Side 2:: 4/0

Channel Type:: Unidirectional

Voltage - Isolation:: 2500Vrms

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

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 9.5ns, 9.5ns

Pulse Width Distortion (Max):: 2.5ns

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

SI8440BB-C-ISR FAQ

1.How can I place an order for SI8440BB-C-ISR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8440BB-C-ISR 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 SI8440BB-C-ISR reliable?

The price and inventory of SI8440BB-C-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8440BB-C-ISR is usually 5 days.

3.What payment methods are accepted for SI8440BB-C-ISR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440BB-C-ISR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8440BB-C-ISR?

SI8440BB-C-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8440BB-C-ISR 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 SI8440BB-C-ISR?

For technical support, including SI8440BB-C-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440BB-C-ISR requirements.

6.How does Aetrix verify that SI8440BB-C-ISR is sourced from the original manufacturer or authorized distributors?

All SI8440BB-C-ISR 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 SI8440BB-C-ISR meets industry standards.

7.What is the process for return or replacement of SI8440BB-C-ISR?

All SI8440BB-C-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8440BB-C-ISR, 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 SI8440BB-C-ISR part is unused and in its original packaging.

Return procedure for SI8440BB-C-ISR:

1.Submit a request within 90 days.

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

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