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Skyworks Solutions Inc. SI8445BA-C-IS1R
- Part No.:
- SI8445BA-C-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8445BA-C-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
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Product details
Overview
SI8445BA-C-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 on both sides and delivers <6 mA per channel at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power systems.
For engineers reviewing the SI8445BA-C-IS1R datasheet, SI8445BA-C-IS1R pinout, SI8445BA-C-IS1R application, or SI8445BA-C-IS1R equivalent, key selection criteria include reinforced 2500 VRMS isolation rating, AEC-Q100 qualification, precise timing (≤0.5 ns channel-channel skew), and compatibility with 3.3 V/5 V mixed-voltage system interfaces.
Technical Context
The SI8445BA-C-IS1R implements capacitive isolation with on-chip RF modulation/demodulation circuitry, delivering DC-to-150 Mbps signal transmission without start-up initialization. Its dual-supply architecture supports independent VDD1 and VDD2 rails (2.70–5.5 V), enabling level-shifting between isolated domains while maintaining tight timing control.
All four channels feature matched propagation delay (<3 ns skew between channels), 6 ns minimum pulse width, and enable-controlled tri-state outputs with 5–8 ns enable-to-data timing. The device achieves 60-year lifetime at rated working voltage and meets IEC 60747-5-2 (VDE 0884-2) and UL 1577 safety standards for reinforced insulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and isolated ADC/DAC links without oversampling or protocol overhead. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical feedback loops in motor control and power inverter gate drivers. |
| Channel-Channel Skew | ≤0.5 ns (typ) - ensures deterministic phase alignment across all four isolated signals for synchronized sampling or PWM distribution. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2. |
| Supply Range | 2.70–5.5 V on both VDD1 and VDD2 - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends in mixed-voltage systems. |
| CMTI | ≥25 kV/µs - prevents data corruption during fast-switching events in inverters and SMPS with high dv/dt noise. |
| Power Consumption | <6 mA per channel at 100 Mbps (5 V) - reduces thermal load and extends battery life in portable isolated sensor nodes. |
Pinout & Package
SI8445BA-C-IS1R is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm creepage and 8.0 mm clearance, optimized for 2500 VRMS reinforced insulation. Pin numbering follows standard SOIC convention with pins 1–8 on one side (side 1) and pins 9–16 on the opposite side (side 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Provides power to input-side logic and channel 1/2 transmitters; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 | Primary-side ground | Reference for input-side signals and VDD1; requires low-impedance connection to minimize noise coupling. |
| IN1–IN4 | Input signal terminals | Digital inputs referenced to GND1; accept 2.0 V VIH / 0.8 V VIL thresholds compatible with CMOS/LVTTL logic. |
| EN1, EN2 | Enable controls for side 1 outputs | Active-high enables output drivers for channels 1–2 (EN1) and 3–4 (EN2); tri-states outputs when low. |
| VDD2 | Secondary-side supply | Provides power to output-side logic and channel 1/2 receivers; independent of VDD1 for level-shifting capability. |
| GND2 | Secondary-side ground | Reference for isolated output signals and VDD2; must be physically separated from GND1 to maintain isolation barrier. |
| OUT1–OUT4 | Isolated output terminals | CMOS-compatible outputs referenced to GND2; drive 4 mA sink/source with 85 Ω nominal output impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at high speed | <6 mA per channel at 100 Mbps (5 V), reducing heat generation and simplifying thermal design in dense PCB layouts. |
| Precision timing performance | 0.5 ns typical channel-channel skew and 1.5 ns pulse width distortion ensure deterministic signal integrity in time-sensitive control loops. |
| No start-up initialization | Valid data appears within 40 µs of power application - eliminates boot-time delays and simplifies system reset sequencing. |
| AEC-Q100 qualified | Rated for automotive-grade temperature range (–40 to 125 °C at 150 Mbps), enabling use in EV traction inverters and onboard chargers. |
| Robust EMC immunity | 25 kV/µs CMTI and >60-year lifetime at rated voltage provide long-term reliability in noisy industrial and automotive environments. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating gate-drive signals and current-sense feedback in three-phase inverter drives. IC Role / Device Role / Timing Role: Quad-channel isolator transmitting PWM commands and sensing data across high-voltage barriers with sub-10 ns timing fidelity. Use Value: Enables precise dead-time control and fast fault response via synchronized 150 Mbps isolated communication between MCU and IGBT/SiC drivers. |
Use Scenario: Providing feedback isolation for secondary-side voltage regulation and primary-side controller communication. 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: Improves transient response and efficiency by eliminating optocoupler latency and enabling 150 Mbps closed-loop bandwidth. |
| Hybrid Electric Vehicle Battery Management | Isolated Data Acquisition Systems |
|
Use Scenario: Isolating cell voltage monitoring and balancing signals in high-voltage battery packs (up to 800 V). IC Role / Device Role / Timing Role: Four independent isolation channels conveying precision ADC readings and balance command signals from high-side to low-side domain. Use Value: Supports AEC-Q100 compliance and 125 °C operation while maintaining <0.5 ns inter-channel skew for accurate SOC estimation. |
Use Scenario: Isolating SPI interfaces between isolated ADCs (e.g., ±10 V input) and host microcontrollers in PLC analog modules. IC Role / Device Role / Timing Role: Transmitting multi-channel sampled data and configuration commands across reinforced insulation barrier at 100+ Mbps. Use Value: Eliminates ground loop errors and enables simultaneous sampling of 4 channels with deterministic timing alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | Quad-channel, 150 Mbps, 2500 VRMS, but uses iCoupler magnetic isolation and has higher 8.5 ns max propagation delay. | Requires external 0.01 µF bypass caps per supply; lacks AEC-Q100 qualification. | Preferred where magnetic isolation immunity to EMI is prioritized over automotive qualification. |
| ISO6741QDWR | Quad-channel, 50 Mbps max, 5000 VRMS reinforced isolation, 16-pin SOIC narrow body, lower power at low data rates. | Not rated for 150 Mbps operation; wider isolation barrier but reduced speed capability. | Selected when higher isolation voltage (5 kVRMS) is required and data rate stays ≤50 Mbps. |
Compared with ADUM140D0BRWZ and ISO6741QDWR, the SI8445BA-C-IS1R uniquely combines AEC-Q100 qualification, 150 Mbps speed, and <9.5 ns propagation delay in a 2500 VRMS wide-body SOIC - making it optimal for automotive and industrial real-time control where timing precision and automotive reliability intersect.
Availability
SI8445BA-C-IS1R is available at Aetrix Electronics and suitable for industrial motor control, hybrid electric vehicle battery management, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8445BA-C-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 for wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for high-reliability, high-speed digital isolation in safety-critical systems-targeting motor drives, EV powertrain, and industrial automation where timing accuracy, isolation robustness, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum operating temperature for SI8445BA-C-IS1R at full 150 Mbps data rate?
The SI8445BA-C-IS1R is specified for continuous operation from –40 °C to +125 °C at 150 Mbps, with supply voltages of 2.70–5.5 V on both VDD1 and VDD2. This rating is validated per AEC-Q100 Grade 1 requirements and applies to both wide-body SOIC package variants under worst-case loading conditions.
Does SI8445BA-C-IS1R require external components for basic operation?
No. SI8445BA-C-IS1R requires only 0.1 µF bypass capacitors on VDD1 and VDD2 pins-no external resistors, transformers, or timing components. Its integrated RF isolation architecture eliminates the need for external clock sources or initialization firmware, enabling plug-and-play integration into existing designs.
How does the enable functionality work on SI8445BA-C-IS1R?
The SI8445BA-C-IS1R features two independent enable inputs: EN1 controls OUT1/OUT2, and EN2 controls OUT3/OUT4. When asserted high, outputs drive actively; when low, they enter high-impedance state within 9.2 ns. This allows dynamic channel gating in multi-zone isolation systems without disrupting other active channels.
Is SI8445BA-C-IS1R pin-compatible with other Si84xx family members?
Yes-SI8445BA-C-IS1R shares identical pinout and package (WB-SOIC-16) with all Si8440/41/42/45 variants. However, functional differences exist: SI8445Bx supports 150 Mbps, while Si8440Ax is limited to 1 Mbps. Direct substitution requires verification of speed, enable behavior, and timing specifications per application.
What safety certifications apply to SI8445BA-C-IS1R?
SI8445BA-C-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These cover reinforced insulation for working voltages up to 560 Vpeak and validate its suitability for industrial and automotive applications requiring functional safety compliance.
SI8445BA-C-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:
- 1000Vrms
- 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
SI8445BA-C-IS1R FAQ
1.How can I place an order for SI8445BA-C-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8445BA-C-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 SI8445BA-C-IS1R reliable?
The price and inventory of SI8445BA-C-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8445BA-C-IS1R is usually 5 days.
3.What payment methods are accepted for SI8445BA-C-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8445BA-C-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8445BA-C-IS1R?
SI8445BA-C-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8445BA-C-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 SI8445BA-C-IS1R?
For technical support, including SI8445BA-C-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8445BA-C-IS1R requirements.
6.How does Aetrix verify that SI8445BA-C-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8445BA-C-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 SI8445BA-C-IS1R meets industry standards.
7.What is the process for return or replacement of SI8445BA-C-IS1R?
All SI8445BA-C-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8445BA-C-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 SI8445BA-C-IS1R part is unused and in its original packaging.
Return procedure for SI8445BA-C-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8445BA-C-IS1R 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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