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Skyworks Solutions Inc. SI8445BB-C-IS1
- Part No.:
- SI8445BB-C-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8445BB-C-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,654
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Product details
Overview
SI8445BB-C-IS1 from Skyworks Solutions is a quad-channel digital isolator with reinforced isolation rated at 2500 VRMS, supporting up to 150 Mbps data rate, worst-case propagation delay <9.5 ns, and operation across –40 to +125 °C at 5 V or 3.3 V supply. It serves as a high-speed signal barrier in isolated power supplies and motor control interfaces.
For engineers reviewing the SI8445BB-C-IS1 datasheet, SI8445BB-C-IS1 pinout, SI8445BB-C-IS1 application, or SI8445BB-C-IS1 equivalent, key selection criteria include its 150 Mbps capability, 0.5 ns typical channel-to-channel skew, 25 kV/µs CMTI, and SOIC-16 wide-body package with 8.0 mm creepage/clearance - critical for industrial and automotive isolation integrity.
Technical Context
The SI8445BB-C-IS1 implements capacitive isolation using on-chip RF modulation/demodulation across four independent bidirectional channels. Each channel features integrated 85 Ω output impedance drivers and supports DC–150 Mbps data transmission without start-up initialization.
It operates with dual independent supplies (VDD1/VDD2 = 2.70–5.5 V), delivers <6 mA per channel at 100 Mbps (5 V), and achieves 6 ns minimum pulse width with 1.5 ns typical pulse width distortion - enabling precise timing in gate driver feedback loops and ADC sampling synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and isolated PWM feedback. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical isolation in real-time motor control and power converter gate drive circuits. |
| Channel-Channel Skew | 0.5–1.8 ns (typ/max) - ensures synchronized multi-channel sampling in isolated ADC/DAC systems. |
| CMTI | 25 kV/µs - maintains signal integrity during fast-switching events in inverters and SMPS with high dv/dt noise. |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements per UL 1577, CSA 5A, and VDE IEC 60747-5-2. |
| Supply Range | 2.70–5.5 V per side - allows interoperability with 3.3 V logic and 5 V microcontrollers without level-shifting. |
| Operating Temp | –40 to +125 °C - qualified for under-hood automotive and industrial ambient environments at full 150 Mbps data rate. |
Pinout & Package
SI8445BB-C-IS1 is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm creepage and clearance, optimized for reinforced insulation compliance. Pin numbering follows standard SOIC convention (pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power input for input-side logic and channel A/B drivers; must be bypassed with 0.1 µF capacitor. |
| GND1 | Primary-side ground | Reference for input-side signals and VDD1; requires low-inductance connection to PCB ground plane. |
| INx / OUTx | Signal I/O (x = A–D) | Four independent bidirectional isolated channels; each supports DC–150 Mbps with internal direction control logic. |
| VDD2 | Secondary-side supply | Power input for output-side logic and channel C/D drivers; galvanically isolated from VDD1. |
| GND2 | Secondary-side ground | Reference for output-side signals and VDD2; physically separated from GND1 by isolation barrier. |
| EN | Enable control | Active-high enable pin; outputs go low when EN = low (Revision C behavior confirmed in datasheet errata). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 100 Mbps | 3.8–19.4 mA per side (5 V), enabling thermally constrained designs in compact industrial modules. |
| Precision timing performance | 1.5 ns typical pulse width distortion and 0.5 ns typical channel-channel skew - critical for synchronous multi-axis motor control. |
| No start-up initialization | Valid data appears within 40 µs of power-on (tSU), eliminating boot-time delays in safety-critical systems. |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - supports deployment in hybrid electric vehicle battery management and traction inverter subsystems. |
| RoHS-compliant wide-body SOIC | 8.0 mm creepage/clearance meets IEC 60664-1 requirements for 600 VRMS working voltage applications. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating gate driver enable/disable signals and current-sense feedback in 3-phase IGBT/SiC inverter stages. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent, low-skew paths for PWM inputs and fault reporting across isolation barrier. Use Value: Enables <10 ns timing alignment between phase legs and supports 25 kV/µs common-mode noise immunity during fast SiC switching. | Use Scenario: Providing isolated feedback for secondary-side voltage regulation and primary-side controller communication in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronous rectifier timing signals across 2500 VRMS barrier with minimal propagation delay. Use Value: Maintains loop stability with <9.5 ns max propagation delay and 6 ns minimum pulse width, preserving regulation bandwidth. |
| Isolated Data Acquisition | Hybrid Electric Vehicle BMS |
Use Scenario: Isolating serial interface lines (SPI clock/data) between isolated ADC front-end and host MCU in high-voltage battery monitoring. IC Role / Device Role / Timing Role: Bidirectional quad-channel isolator handling full-duplex SPI with matched channel timing for simultaneous multi-cell sampling. Use Value: 0.5 ns typical channel-channel skew ensures synchronized conversion start across 16+ cells, reducing measurement jitter. | Use Scenario: Isolating CAN bus transceiver power domains and cell voltage monitoring signals in 400–800 V traction battery packs. IC Role / Device Role / Timing Role: Providing reinforced isolation for diagnostic communication and analog sensor interfaces while meeting AEC-Q100 Grade 1 requirements. Use Value: 2500 VRMS rating and –40 to +125 °C operation support long-term reliability in under-hood thermal cycling environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140E0BRWZ | 4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16 wide-body; higher 10.5 ns max propagation delay vs. SI8445BB-C-IS1's 9.5 ns. | Same industrial isolation use cases but less suitable for sub-10 ns timing-critical gate driver feedback. | Select when legacy ADI ecosystem integration or specific radiation tolerance requirements dominate over ultra-low skew. |
| ISO6741QDWR | 4-channel, 50 Mbps, 5 kVRMS, SOIC-16 wide-body; lower speed, higher isolation rating, and 125 °C operation. | Better suited for high-isolation, lower-speed applications like HVDC protection relays where 150 Mbps is unnecessary. | Select when 5 kVRMS working voltage compliance is mandatory and data rate ≤50 Mbps suffices. |
Compared with ADUM140E0BRWZ and ISO6741QDWR, SI8445BB-C-IS1 delivers the lowest propagation delay and channel skew in its class while maintaining 2500 VRMS rating and AEC-Q100 qualification - making it optimal for high-fidelity timing-critical isolation where both speed and robustness are required.
Availability
SI8445BB-C-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 SI8445BB-C-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 designed specifically for high-reliability, high-speed digital isolation in industrial automation, automotive electrification, and energy infrastructure - emphasizing low power, precision timing, and regulatory compliance.
FAQ
What is the maximum data rate supported by SI8445BB-C-IS1?
The SI8445BB-C-IS1 supports a maximum data rate of 150 Mbps across all four channels under specified operating conditions (VDD = 5 V, TA = –40 to +125 °C). This is validated per datasheet Table 3 and applies to both narrow- and wide-body SOIC packages. The SI8445BB-C-IS1 achieves this rate with worst-case propagation delay <9.5 ns and pulse width distortion <2.5 ns.
Does SI8445BB-C-IS1 require external startup configuration?
No, SI8445BB-C-IS1 does not require external startup configuration or initialization sequence. Valid data appears at outputs within 40 µs of power application (tSU), as specified in Table 3. This zero-initialization behavior simplifies system design and eliminates boot-time dependencies in safety-critical applications.
What isolation certifications apply to SI8445BB-C-IS1?
SI8445BB-C-IS1 is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These approvals cover reinforced insulation with 8.0 mm creepage/clearance in the wide-body SOIC package and are production-tested to 3.0 kVRMS for 1 second per datasheet Table 6.
How does the EN pin function on SI8445BB-C-IS1?
The EN pin on SI8445BB-C-IS1 is an active-high enable input. When EN is low, all outputs are driven low (per Revision C erratum on page 24). When EN is high, normal isolation operation resumes. Input leakage is ≤2.0 µA, and enable-to-data-valid delay is 5.0–8.0 ns (ten1), ensuring rapid state transitions.
Is SI8445BB-C-IS1 suitable for automotive applications?
Yes, SI8445BB-C-IS1 is AEC-Q100 qualified (Grade 1, –40 to +125 °C) and rated for 2500 VRMS isolation - making it suitable for hybrid electric vehicle applications including battery management systems, on-board chargers, and traction inverter control. Its 25 kV/µs CMTI and low timing skew support robust operation in high-noise powertrain environments.
SI8445BB-C-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
SI8445BB-C-IS1 FAQ
1.How can I place an order for SI8445BB-C-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8445BB-C-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 SI8445BB-C-IS1 reliable?
The price and inventory of SI8445BB-C-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8445BB-C-IS1 is usually 5 days.
3.What payment methods are accepted for SI8445BB-C-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8445BB-C-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8445BB-C-IS1?
SI8445BB-C-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8445BB-C-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 SI8445BB-C-IS1?
For technical support, including SI8445BB-C-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8445BB-C-IS1 requirements.
6.How does Aetrix verify that SI8445BB-C-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8445BB-C-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 SI8445BB-C-IS1 meets industry standards.
7.What is the process for return or replacement of SI8445BB-C-IS1?
All SI8445BB-C-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8445BB-C-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 SI8445BB-C-IS1 part is unused and in its original packaging.
Return procedure for SI8445BB-C-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8445BB-C-IS1 Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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