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Home > Products > Isolators > Digital Isolators

Skyworks Solutions Inc. SI8440BB-D-IS1R

Name: SI8440BB-D-IS1R
Brand: Skyworks Solutions Inc.
SKU: SI8440BB-D-IS1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8440BB-D-IS1R

Manufacturer:: Skyworks Solutions Inc.

Category:: Digital Isolators

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

Datasheet:: SI8440BB-D-IS1R.pdf

Description:: DGTL ISO 2500VRMS 4CH GP 16SOIC

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Product details

Overview

SI8440BB-D-IS1R from Skyworks Solutions is a quad-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate with <9.5 ns worst-case propagation delay and 25 kV/µs common-mode transient immunity. It operates across 2.70–5.5 V supply rails and delivers <6 mA per channel at 100 Mbps (5 V), enabling high-speed isolation in motor control and isolated power supplies.

For engineers reviewing the SI8440BB-D-IS1R datasheet, SI8440BB-D-IS1R pinout, SI8440BB-D-IS1R application, or SI8440BB-D-IS1R equivalent, key selection criteria include its 2.5 kVRMS reinforced insulation rating, AEC-Q100 qualification, 0.5 ns typical channel-to-channel skew, and compatibility with 3.3 V/5 V mixed-supply systems in industrial and automotive environments.

Technical Context

The SI8440BB-D-IS1R implements capacitive isolation with on-chip RF modulation/demodulation circuitry, eliminating start-up initialization and enabling immediate data transmission after power-on. Its dual-die architecture separates input and output domains, supporting independent VDD1/VDD2 supplies (2.70–5.5 V) and delivering precise timing with ≤1.5 ns pulse width distortion and ≤3.0 ns propagation delay skew.

It features an enable input (ENx) that places outputs in high-impedance state within 9.2 ns (ten2), supports 15 pF load drive, and maintains stable performance across –40 °C to +125 °C at full 150 Mbps data rate-validated under AEC-Q100 Grade 1 conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 150 Mbps - enables real-time feedback in servo drives and high-frequency PWM gate drivers.
Propagation Delay	3.0–9.5 ns (typ/max) - ensures sub-10 ns timing integrity for synchronous ADC sampling and digital power control loops.
Channel-Channel Skew	0.5–1.8 ns (typ/max) - preserves phase alignment across four isolated signals in multi-phase motor control.
Supply Current @ 100 Mbps	<6 mA per channel at 5 V - reduces thermal load and simplifies power budgeting in space-constrained inverters.
Isolation Voltage	2500 VRMS (1 min) - meets reinforced insulation requirements for IEC 61800-5-1 and UL 61800-5-1 in variable frequency drives.
CMTI	25 kV/µs - prevents false triggering during fast-switching SiC/GaN power stage transients.
Operating Temp	–40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions without derating.

Pinout & Package

SI8440BB-D-IS1R is housed in a RoHS-compliant 16-pin wide-body SOIC package (package outline per Skyworks Doc #28), with creepage/clearance of 8.0 mm and reinforced insulation certified to VDE 0884-11, UL 1577, and CSA Component Notice 5A.

Pin/Terminal	Circuit Role	Design Meaning
VDD1	Primary-side supply	Power for input-side logic and isolation transmitter; accepts 2.70–5.5 V with bypass capacitor required.
GND1	Primary-side ground	Reference for input signals and VDD1; must be separated from GND2 by isolation barrier.
IN1–IN4	Digital input channels	CMOS-compatible inputs accepting 0–VDD1 logic; no external pull-ups needed.
EN1–EN4	Channel enable inputs	Active-high enables; tri-states corresponding OUTx when low (ten2 = 7–9.2 ns).
VDD2	Secondary-side supply	Independent power for output-side logic and receiver; supports mixed-voltage interfacing (e.g., 3.3 V MCU to 5 V actuator).
GND2	Secondary-side ground	Reference for output signals and VDD2; galvanically isolated from GND1.
OUT1–OUT4	Digital output channels	Push-pull CMOS outputs driving 15 pF loads; VOH ≥ VDD2–0.4 V, VOL ≤ 0.4 V.

Key Features

Feature	Design Value
Ultra-low power at high speed	<6 mA per channel at 100 Mbps / 5 V - enables 4-channel isolation in thermally constrained battery-powered gate driver modules.
No start-up initialization	Valid data at output within 40 µs of power application (tSU) - eliminates boot-time delays in safety-critical PLC I/O modules.
Precision timing	0.5 ns typical channel-channel skew and 1.5 ns pulse width distortion - supports time-of-flight sensing and synchronized multi-axis motion control.
Robust noise immunity	25 kV/µs CMTI and 60-year life at rated working voltage - sustains reliability in EMI-heavy factory automation environments.
AEC-Q100 qualified	Grade 1 (–40 °C to +125 °C) qualification - validates suitability for automotive traction inverter auxiliary control and onboard chargers.

Applications

Industrial Motor Control	Isolated Switch-Mode Power Supply
Use Scenario: Four-channel isolation of PWM signals and fault feedback between MCU and three-phase inverter gate drivers in servo amplifiers. IC Role / Device Role / Timing Role: Quad-channel digital isolator providing bidirectional signal integrity across isolation barrier with <9.5 ns propagation delay and 0.5 ns channel skew. Use Value: Enables precise dead-time control and simultaneous gate drive updates, reducing shoot-through risk and improving inverter efficiency by >2%.	Use Scenario: Isolating feedback signals (voltage/current sense) and PWM commands between primary-side controller and secondary-side synchronous rectifier in 1–3 kW telecom PSUs. IC Role / Device Role / Timing Role: High-CMTI isolator transmitting analog-derived digital signals across 2.5 kVRMS barrier with minimal latency and jitter. Use Value: Maintains regulation accuracy under fast load transients and prevents control loop instability caused by common-mode noise coupling.
Hybrid Electric Vehicle Inverter	Isolated Data Acquisition
Use Scenario: Isolating gate drive signals and DESAT fault reporting from IGBT/SiC modules to vehicle MCU in HEV main traction inverter. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 quad isolator operating at 125 °C ambient with 150 Mbps capability for fast fault response. Use Value: Reduces fault detection latency to <100 ns, enabling safe shutdown before IGBT thermal runaway occurs.	Use Scenario: Isolating serial interface (SPI) lines between isolated ADC (e.g., AD7403) and host processor in high-voltage battery monitoring systems. IC Role / Device Role / Timing Role: Low-skew, low-jitter isolator preserving SPI clock/data timing across 2.5 kVRMS barrier at up to 20 MHz SCLK. Use Value: Prevents bit errors and frame loss during high dv/dt events in EV battery packs, ensuring accurate cell voltage reporting.

Industrial Motor Control

Isolated Switch-Mode Power Supply

Use Scenario: Four-channel isolation of PWM signals and fault feedback between MCU and three-phase inverter gate drivers in servo amplifiers.

IC Role / Device Role / Timing Role: Quad-channel digital isolator providing bidirectional signal integrity across isolation barrier with <9.5 ns propagation delay and 0.5 ns channel skew.

Use Value: Enables precise dead-time control and simultaneous gate drive updates, reducing shoot-through risk and improving inverter efficiency by >2%.

Use Scenario: Isolating feedback signals (voltage/current sense) and PWM commands between primary-side controller and secondary-side synchronous rectifier in 1–3 kW telecom PSUs.

IC Role / Device Role / Timing Role: High-CMTI isolator transmitting analog-derived digital signals across 2.5 kVRMS barrier with minimal latency and jitter.

Use Value: Maintains regulation accuracy under fast load transients and prevents control loop instability caused by common-mode noise coupling.

Hybrid Electric Vehicle Inverter

Isolated Data Acquisition

Use Scenario: Isolating gate drive signals and DESAT fault reporting from IGBT/SiC modules to vehicle MCU in HEV main traction inverter.

IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 quad isolator operating at 125 °C ambient with 150 Mbps capability for fast fault response.

Use Value: Reduces fault detection latency to <100 ns, enabling safe shutdown before IGBT thermal runaway occurs.

Use Scenario: Isolating serial interface (SPI) lines between isolated ADC (e.g., AD7403) and host processor in high-voltage battery monitoring systems.

IC Role / Device Role / Timing Role: Low-skew, low-jitter isolator preserving SPI clock/data timing across 2.5 kVRMS barrier at up to 20 MHz SCLK.

Use Value: Prevents bit errors and frame loss during high dv/dt events in EV battery packs, ensuring accurate cell voltage reporting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM2402BRWZ	4-channel, 25 Mbps max data rate; 2.5 kVRMS isolation; SOIC-16 narrow body; higher 10 ns propagation delay.	Limited to lower-speed industrial I/O; not AEC-Q100 qualified; narrower creepage (4.01 mm) vs. SI8440BB-D-IS1R's 8.0 mm.	Select when cost sensitivity outweighs speed and automotive qualification needs.
ISO6741QDWR	4-channel, 50 Mbps max; 5000 VRMS isolation; SOIC-16 wide body; 11 ns propagation delay; supports 1.8–5.5 V supplies.	Higher isolation rating but lower speed; lacks AEC-Q100 Grade 1 rating; optimized for functional safety systems requiring 5 kVRMS.	Select when reinforced insulation voltage >2.5 kVRMS is mandatory and 150 Mbps is unnecessary.

Compared with ADUM2402BRWZ and ISO6741QDWR, SI8440BB-D-IS1R delivers the highest data rate (150 Mbps) and lowest timing uncertainty (0.5 ns skew) in a wide-body SOIC, making it optimal for high-performance motor control and automotive inverter designs where speed, precision, and temperature robustness are critical.

Availability

SI8440BB-D-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle inverters, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle support, and compliance with UL, VDE, and CSA safety standards.

Supply support for SI8440BB-D-IS1R 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 designed specifically for high-reliability, high-speed digital isolation in demanding industrial and automotive applications-emphasizing low power, precise timing, and robust safety certification.

FAQ

What is the maximum data rate supported by SI8440BB-D-IS1R?

The SI8440BB-D-IS1R supports a maximum data rate of 150 Mbps, verified across the full operating temperature range (–40 °C to +125 °C) and supply voltage range (2.70–5.5 V). This specification applies specifically to the 'Bx' variant within the Si844x family, as confirmed in Tables 3–5 of the Skyworks datasheet Rev. 1.7.

Does SI8440BB-D-IS1R require external pull-up or pull-down resistors on its input pins?

No, SI8440BB-D-IS1R does not require external pull-up or pull-down resistors on IN1–IN4 pins. Its CMOS-compatible inputs have defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds and internal design ensures proper logic interpretation without external biasing-confirmed in Table 3 and Table 4 of the Skyworks datasheet.

What safety certifications apply to SI8440BB-D-IS1R?

SI8440BB-D-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-11 (IEC 60747-5-2), with reinforced insulation ratings validated for 2.5 kVRMS working voltage. These certifications are explicitly stated in Tables 6 and 7 of the Skyworks datasheet Rev. 1.7.

Can SI8440BB-D-IS1R operate with different supply voltages on each side (VDD1 ≠ VDD2)?

Yes, SI8440BB-D-IS1R supports independent supply rails: VDD1 (input side) and VDD2 (output side) can each be set between 2.70 V and 5.5 V, enabling level-shifting between 3.3 V microcontrollers and 5 V actuators. This dual-supply operation is specified in Table 1 and confirmed across all electrical characterization tables (3–5).

Is SI8440BB-D-IS1R pin-compatible with other variants in the Si844x family?

Yes, SI8440BB-D-IS1R shares identical pinout and package (16-pin wide-body SOIC) with all Si8440/41/42/45 variants, including SI8440AB-D-IS1R and SI8442BB-D-IS1R. Pin compatibility is guaranteed per Skyworks' "4. Pin Descriptions" and package outlines (pages 25, 28, 30), enabling drop-in replacement within the same channel count and package type.

SI8440BB-D-IS1R Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm 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-D-IS1R FAQ

1.How can I place an order for SI8440BB-D-IS1R through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8440BB-D-IS1R 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-D-IS1R reliable?

The price and inventory of SI8440BB-D-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8440BB-D-IS1R is usually 5 days.

3.What payment methods are accepted for SI8440BB-D-IS1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8440BB-D-IS1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8440BB-D-IS1R?

SI8440BB-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8440BB-D-IS1R 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-D-IS1R?

For technical support, including SI8440BB-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8440BB-D-IS1R requirements.

6.How does Aetrix verify that SI8440BB-D-IS1R is sourced from the original manufacturer or authorized distributors?

All SI8440BB-D-IS1R 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-D-IS1R meets industry standards.

7.What is the process for return or replacement of SI8440BB-D-IS1R?

All SI8440BB-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8440BB-D-IS1R, 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-D-IS1R part is unused and in its original packaging.

Return procedure for SI8440BB-D-IS1R:

1.Submit a request within 90 days.

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

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