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Skyworks Solutions Inc. SI8445BB-D-IS1
- Part No.:
- SI8445BB-D-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8445BB-D-IS1.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
SI8445BB-D-IS1 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 worst-case propagation delay <9.5 ns, 0.5 ns channel-channel skew, and 25 kV/µs common-mode transient immunity. It operates across 2.70–5.5 V supply rails and delivers <3.8 mA per channel at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power inverters.
For engineers reviewing the SI8445BB-D-IS1 datasheet, SI8445BB-D-IS1 pinout, SI8445BB-D-IS1 application, or SI8445BB-D-IS1 equivalent, this page provides verified electrical specifications, safety-certified isolation parameters, timing performance at 150 Mbps, thermal operation up to 125 °C, and direct substitution guidance for legacy Si844x designs requiring reinforced insulation up to 2500 VRMS.
Technical Context
The SI8445BB-D-IS1 implements capacitive digital isolation using on-chip RF modulation/demodulation, delivering deterministic timing with 1.5 ns typical pulse width distortion and 2 ns propagation delay skew across all four channels. Its dual-supply architecture (VDD1/VDD2) supports independent 2.70–5.5 V operation on each side, enabling level-shifting between 3.3 V and 5 V domains without external logic.
It integrates enable-controlled tri-state outputs with 5.0–8.0 ns enable-to-data-valid latency and meets AEC-Q100 Grade 1 qualification for automotive subsystems. Safety certification includes UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK working voltage), with 60-year lifetime at rated voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 150 Mbps - enables real-time feedback in servo drives and isolated ADC interfaces |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns timing budget compliance for high-frequency PWM control loops |
| Channel-Channel Skew | 0.5 ns typical - preserves phase alignment across multi-phase gate drivers or encoder channels |
| Supply Voltage Range | 2.70–5.5 V per side - supports mixed-voltage systems without level translators |
| CMTI | 25 kV/µs - maintains signal integrity in noisy motor drive and inverter environments |
| Isolation Withstand | 2500 VRMS (1 min) - certified for reinforced insulation in industrial safety-critical applications |
| Operating Temperature | –40 to +125 °C - validated for full-speed operation at 150 Mbps across automotive and industrial extremes |
Pinout & Package
SI8445BB-D-IS1 is housed in a 16-pin wide-body SOIC (WB-SOIC-16) package with 8.0 mm creepage/clearance, optimized for 2500 VRMS reinforced insulation. Pin spacing and layout comply with IPC-7351B standard land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power input for input-side logic and isolator transmitter (2.70–5.5 V) |
| GND1 | Primary-side ground | Reference for input-side signals and VDD1 return path |
| IN1–IN4 | Digital input channels | Unidirectional CMOS inputs accepting 0–VDD1 logic levels |
| EN1–EN4 | Channel enable inputs | Active-high controls output state; low = tri-state, high = active |
| VDD2 | Secondary-side supply | Power input for output-side logic and isolator receiver (2.70–5.5 V) |
| GND2 | Secondary-side ground | Reference for output-side signals and VDD2 return path |
| OUT1–OUT4 | Digital output channels | CMOS outputs driving loads up to ±4 mA with 85 Ω nominal impedance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 100 Mbps | 3.8 mA per channel @ 5 V - reduces thermal load in dense PCB layouts |
| Precision timing | 0.5 ns channel-channel skew - enables synchronized sampling in multi-channel isolated ADC systems |
| No start-up initialization | Valid data within 40 µs of power-on - eliminates boot-time delays in safety-critical power systems |
| High CMTI immunity | 25 kV/µs - prevents false triggering during fast-switching IGBT/MOSFET transitions |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) - suitable for automotive traction inverter and battery management subsystems |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting high-speed control signals while blocking 1000+ VDC common-mode transients. Use Value: Enables precise 150 Mbps timing synchronization across all three phases with <0.5 ns skew, reducing torque ripple. |
Use Scenario: Providing isolated voltage and current feedback from secondary-side SMPS controllers to primary-side PWM ICs. IC Role / Device Role / Timing Role: Bidirectional signal isolator carrying error amplifier outputs and fault signals across 2500 VRMS barrier. Use Value: Maintains loop stability with 6 ns minimum pulse width and 25 kV/µs CMTI, preventing false overcurrent trips. |
| Automotive Battery Management | Industrial PLC I/O Modules |
Use Scenario: Isolating cell voltage monitoring and balancing commands between high-voltage battery packs and low-voltage MCU domains. IC Role / Device Role / Timing Role: AEC-Q100 qualified digital isolator ensuring safe, reliable communication under automotive thermal and EMI stress. Use Value: Delivers 125 °C operation at full 150 Mbps data rate, supporting real-time BMS diagnostics without derating. |
Use Scenario: Isolating digital I/O lines (DI/DO) in modular PLC backplanes exposed to factory floor noise and ground potential differences. IC Role / Device Role / Timing Role: Four independent isolation channels replacing optocouplers in DIN-rail mounted control modules. Use Value: Reduces board space by 60% vs. discrete optocoupler solutions while improving long-term reliability and temperature stability. |
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 |
|---|---|---|---|
| ADUM140D0BRWZ | 150 Mbps max, 2.5 V–3.6 V only, 10 ns max propagation delay, 2500 VRMS rating | Limited to 3.6 V operation; no 5 V compatibility or AEC-Q100 qualification | Choose when system uses only 3.3 V supplies and requires Analog Devices' iCoupler reliability profile |
| ISO6741QDWRQ1 | 50 Mbps max, 1.71–5.5 V, 11 ns max propagation delay, 5000 VRMS rating, automotive AEC-Q100 | Lower speed ceiling; higher isolation rating but larger package footprint | Prefer for automotive applications requiring >3000 VRMS withstand or where lower data rate suffices |
Compared with ADUM140D0BRWZ and ISO6741QDWRQ1, SI8445BB-D-IS1 uniquely combines 150 Mbps speed, 2.70–5.5 V dual-supply flexibility, AEC-Q100 Grade 1, and 16-pin WB-SOIC compactness-making it optimal for space-constrained, high-speed industrial and automotive isolation where 5 V logic coexists with 3.3 V domains.
Availability
SI8445BB-D-IS1 is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management systems, and isolated switch-mode power supplies requiring stable component supply and long-lifecycle support.
Supply support for SI8445BB-D-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 for wireless, automotive, and industrial markets.
The SI844x family was designed specifically for high-reliability, high-speed digital isolation in safety-critical power conversion and control systems-replacing optocouplers with superior timing, power efficiency, and lifetime stability.
FAQ
What is the maximum operating temperature for SI8445BB-D-IS1 at full 150 Mbps data rate?
The SI8445BB-D-IS1 is fully characterized and guaranteed to operate at 150 Mbps across –40 to +125 °C ambient temperature with 5 V supplies and 15 pF load. This specification is validated per Table 3 and Table 4 in the official Skyworks datasheet Rev. 1.7, confirming no derating is required for high-speed operation in automotive engine compartments or industrial enclosures.
Does SI8445BB-D-IS1 support independent supply voltages on each side?
Yes, SI8445BB-D-IS1 supports fully independent VDD1 (input side) and VDD2 (output side) supplies ranging from 2.70 V to 5.5 V each. This allows seamless level translation-for example, interfacing a 3.3 V microcontroller to a 5 V gate driver-without external level shifters, as confirmed in Tables 1–5 of the Skyworks datasheet.
What safety certifications apply to SI8445BB-D-IS1?
SI8445BB-D-IS1 carries UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK) certifications. These are production-tested to 3000 VRMS for 1 second and documented in Tables 6 and 7 of the Skyworks datasheet Rev. 1.7.
How does the enable function work on SI8445BB-D-IS1?
Each channel has a dedicated ENx pin: when driven high, the corresponding OUTx pin actively drives logic levels; when low, OUTx enters high-impedance tri-state mode. Enable-to-data-valid latency is 5.0–8.0 ns, and enable-to-tri-state is 7.0–9.2 ns-critical for dynamic channel gating in multiplexed isolation architectures.
Is SI8445BB-D-IS1 pin-compatible with other Si844x variants?
Yes, SI8445BB-D-IS1 shares identical pinout and package (WB-SOIC-16) with all Si8440/41/42/45 family members. However, functional differences exist-e.g., Si8440Bx is limited to 1 Mbps-so replacement requires verification of speed, enable behavior, and supply range compatibility per datasheet Tables 3–5.
SI8445BB-D-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:
- 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-D-IS1 FAQ
1.How can I place an order for SI8445BB-D-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8445BB-D-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-D-IS1 reliable?
The price and inventory of SI8445BB-D-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-D-IS1 is usually 5 days.
3.What payment methods are accepted for SI8445BB-D-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8445BB-D-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8445BB-D-IS1?
SI8445BB-D-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8445BB-D-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-D-IS1?
For technical support, including SI8445BB-D-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8445BB-D-IS1 requirements.
6.How does Aetrix verify that SI8445BB-D-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8445BB-D-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-D-IS1 meets industry standards.
7.What is the process for return or replacement of SI8445BB-D-IS1?
All SI8445BB-D-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8445BB-D-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-D-IS1 part is unused and in its original packaging.
Return procedure for SI8445BB-D-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8445BB-D-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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