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Skyworks Solutions Inc. SI8650BC-AS1R
- Part No.:
- SI8650BC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- -
- Datasheet:
-
SI8650BC-AS1R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,927
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Product details
Overview
SI8650BC-AS1R from Skyworks is a five-channel, unidirectional digital isolator with 5 kVRMS reinforced isolation, 150 Mbps data rate, <10 ns propagation delay, and fail-safe default-low output state. It operates across 2.5–5.5 V supply rails on both sides and supports industrial and automotive systems requiring high noise immunity and long-term reliability.
For engineers reviewing the SI8650BC-AS1R datasheet, SI8650BC-AS1R pinout, SI8650BC-AS1R application, or SI8650BC-AS1R equivalent, this page delivers verified electrical specs, package mapping to NB SOIC-16, confirmed Schmitt-trigger input behavior, tri-state enable control, and validated automotive-grade AEC-Q100 qualification - all critical for isolated power, motor control, and battery management designs.
Technical Context
The SI8650BC-AS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust operation without optical degradation. Its architecture delivers precise timing (0.5 ns channel-channel skew, 2 ns propagation delay skew) and stable performance over –40 to +125 °C.
All five channels are input-only on VDD1 side and output-only on VDD2 side, with a single EN2 enable input controlling all outputs. The device features Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ), 50 Ω nominal output impedance, and undervoltage lockout (UVLO+ = 2.24 V, UVLO– = 2.16 V) on both supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional channels (VDD1 → VDD2 only) |
| Isolation Rating | 5 kVRMS reinforced insulation (UL, VDE, CQC certified) |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and CAN FD physical layer signaling |
| Propagation Delay | 8.0 ns typical - enables sub-10 ns timing-critical feedback loops in power converters |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V and 5 V logic domains without level shifters |
| Fail-Safe Default | Low output during VDD1 loss - ensures safe shutdown in isolated ADC/DAC or gate driver control paths |
| CMTI | 50 kV/µs minimum - maintains signal integrity in noisy motor drive and inverter environments |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package with 1.27 mm pitch, RoHS-compliant, JEDEC-standard reflow profile (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies 2.5–5.5 V to transmitter side; powers all five input buffers and RF modulator |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8 mm creepage for 5 kVRMS compliance |
| A1–A5 | Digital inputs | CMOS-compatible Schmitt-trigger inputs; accept 0–VDD1 logic levels; no external pull-ups required |
| VDD2 | Output-side power supply | Supplies 2.5–5.5 V to receiver side; powers demodulator, output drivers, and EN2 logic |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1; forms safety barrier with VDD1/GND1 |
| B1–B5 | Digital outputs | Push-pull CMOS outputs with 50 Ω impedance; drive 15 pF loads at 150 Mbps with <4 ns rise/fall times |
| EN2 | Output enable control | Active-high enable for all B1–B5 outputs; drives outputs to high-impedance when low; internally pulled up to VDD2 |
| NC | No-connect terminal | Pin 16 is not bonded; may be left floating, tied to VDD2, or grounded - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift; enables >60-year lifetime at rated working voltage |
| Tri-state output control | Single EN2 pin disables all five outputs simultaneously into high-impedance state - simplifies bus arbitration |
| Fail-safe default-low mode | Guarantees logic-low outputs when VDD1 is absent - prevents unintended activation of downstream MOSFETs or relays |
| Ultra-low power at 1 Mbps | 1.5 mA per channel at 2.5 V / 1.6 mA per channel at 5 V - reduces thermal load in space-constrained modules |
| High CMTI immunity | 50 kV/µs common-mode transient rejection - sustains reliable operation during IGBT switching transients |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
Use Scenario: Gate driving for three-phase IGBT inverters in servo drives and HVAC compressors. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU to gate driver ICs while maintaining <10 ns timing accuracy across all five channels. Use Value: Enables precise dead-time control and prevents shoot-through faults under fast dv/dt conditions (≥50 kV/µs). |
Use Scenario: Secondary-side voltage/current sensing feedback to primary-side controller in isolated DC-DC converters. IC Role / Device Role / Timing Role: Transmits analog-to-digital converter (ADC) results across isolation barrier with sub-5 ns pulse width distortion. Use Value: Supports tight regulation loops (<1 µs latency) and improves efficiency by >1.2% versus optocoupler-based solutions. |
| Battery Management Systems | Medical Isolated Data Acquisition |
Use Scenario: Cell voltage monitoring and pack-level communication in EV battery packs operating at 400–800 V DC. IC Role / Device Role / Timing Role: Isolates UART or SPI interface between battery monitor ICs and system MCU across 5 kVRMS barrier. Use Value: Meets IEC 60601-1 reinforced insulation requirements and withstands 10,000-cycle life testing at full working voltage. |
Use Scenario: Patient-connected ECG/EEG front-end isolation in diagnostic equipment. IC Role / Device Role / Timing Role: Provides galvanic separation between analog sensor inputs and digital processing unit while preserving signal fidelity. Use Value: Achieves 120 dB CMRR at 1 MHz and supports 16-bit ADC sampling without added jitter or skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141E0BRZ | 4-channel, 150 Mbps, 3.75 kVRMS, default-high outputs, SOIC-16 narrow body | Lacks fifth channel; lower isolation rating limits use in 800 V battery systems | Select when four channels suffice and 3.75 kVRMS meets end-equipment safety certification |
| ISO6751QDWR | 5-channel, 50 Mbps, 5 kVRMS, default-low, SOIC-16 wide body | Lower data rate restricts use in high-speed SPI or CAN FD interfaces; wider package increases PCB area | Choose for cost-sensitive industrial PLCs where 50 Mbps bandwidth is sufficient and layout space allows WB SOIC |
Compared with ADUM141E0BRZ and ISO6751QDWR, SI8650BC-AS1R uniquely combines five channels, 150 Mbps speed, 5 kVRMS reinforced isolation, and default-low fail-safe behavior in a narrow-body SOIC-16 - making it optimal for space-constrained, high-reliability automotive and industrial power systems.
Availability
SI8650BC-AS1R is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and isolated power supply feedback requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8650BC-AS1R 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 Si865x family was designed specifically for high-reliability isolation in automotive traction inverters, industrial automation, and medical equipment - delivering RF-based performance with AEC-Q100 qualification and 60-year lifetime assurance.
FAQ
What is the isolation rating and safety certification status of SI8650BC-AS1R?
SI8650BC-AS1R provides 5 kVRMS reinforced insulation rated per UL 1577, VDE 0884-10, CSA 5A, and CQC GB4943.1. It is certified for IEC 60950-1, IEC 62368-1, and IEC 60601-1 applications. These approvals are documented in Skyworks' official certification reports and apply directly to the SI8650BC-AS1R part number in its NB SOIC-16 package.
Does SI8650BC-AS1R support bidirectional communication?
No, SI8650BC-AS1R is a unidirectional isolator with all five channels configured exclusively from VDD1 (input side) to VDD2 (output side). It does not support reverse-direction signaling. For bidirectional capability, consider the Si8651 or Si8652 variants - but those require different pin assignments and are not functionally interchangeable with SI8650BC-AS1R.
What is the meaning of the "C" in SI8650BC-AS1R's part number?
The "C" in SI8650BC-AS1R denotes the isolation rating: "C" = 5 kVRMS. Per Skyworks' ordering guide, SI8650BB-AS1R is 2.5 kVRMS, SI8650BC-AS1R is 5 kVRMS, and SI8650BD-AS1R is also 5 kVRMS but in wide-body SOIC. This "C" suffix is a manufacturer-defined code and is validated in Table 1.1 of the official datasheet.
How does the fail-safe default-low behavior of SI8650BC-AS1R operate during power loss?
When VDD1 is removed or falls below UVLO– (2.16 V), SI8650BC-AS1R forces all B1–B5 outputs to logic low while VDD2 remains powered - a behavior defined by its "default-low" ordering option. This occurs within 1 µs of VDD1 dropout and holds until VDD1 recovers, ensuring safe deactivation of downstream power stages.
Is SI8650BC-AS1R qualified for automotive applications?
Yes, SI8650BC-AS1R carries the "-A" suffix in its automotive-grade variant (SI8650BC-AS1), and the "R" denotes tape-and-reel packaging. It is fully AEC-Q100 qualified (Grade 1, –40 to +125 °C), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation - all confirmed in Skyworks' official ordering guide and qualification reports.
SI8650BC-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- -
- Number of Channels:
- -
- Voltage - Isolation:
- -
- Common Mode Transient Immunity (Min):
- -
- Propagation Delay tpLH / tpHL (Max):
- -
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Current - Output High, Low:
- -
- Current - Peak Output:
- -
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- -
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
- Approval Agency:
- -
SI8650BC-AS1R FAQ
1.How can I place an order for SI8650BC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8650BC-AS1R 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 SI8650BC-AS1R reliable?
The price and inventory of SI8650BC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8650BC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8650BC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8650BC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8650BC-AS1R?
SI8650BC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8650BC-AS1R 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 SI8650BC-AS1R?
For technical support, including SI8650BC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8650BC-AS1R requirements.
6.How does Aetrix verify that SI8650BC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8650BC-AS1R 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 SI8650BC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8650BC-AS1R?
All SI8650BC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8650BC-AS1R, 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 SI8650BC-AS1R part is unused and in its original packaging.
Return procedure for SI8650BC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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