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Skyworks Solutions Inc. SI8650BD-B-ISR
- Part No.:
- SI8650BD-B-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8650BD-B-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,514
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Product details
Overview
SI8650BD-B-ISR from Skyworks is a five-channel, unidirectional digital isolator with 5 kVRMS reinforced insulation, 150 Mbps data rate, <10 ns propagation delay, and fail-safe low-default output mode. 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 in harsh environments.
For engineers reviewing the SI8650BD-B-ISR datasheet, SI8650BD-B-ISR pinout, SI8650BD-B-ISR application, or SI8650BD-B-ISR equivalent, this page delivers verified specifications, package mapping, functional context, real-world use cases, and validated alternative options for isolated signal transmission in power electronics and EV subsystems.
Technical Context
The SI8650BD-B-ISR implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust operation without optical degradation. Its architecture delivers sub-10 ns propagation delay with ≤2.5 ns channel-to-channel skew and 50 kV/µs common-mode transient immunity (CMTI).
All five channels are input-side (VDD1) to output-side (VDD2) unidirectional, with Schmitt-trigger inputs for noise rejection and a single enable (EN) input controlling all outputs. The device features selectable fail-safe mode (low default), undervoltage lockout (UVLO) on both sides, and tri-state output capability via EN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, A-side to B-side only - enables clean separation of control logic and power-stage signals. |
| Isolation Rating | 5 kVRMS reinforced insulation - certified per UL 1577, VDE 0884-10, IEC 62368-1, and GB4943.1 for safety-critical HV interfaces. |
| Max Data Rate | 150 Mbps - supports high-speed serial links such as isolated SPI, RS-485 transceiver control, and gate driver feedback. |
| Propagation Delay | 5–13 ns (typ. 8 ns) - ensures tight timing alignment in motor control PWM synchronization and ADC sampling triggers. |
| Supply Voltage | 2.5–5.5 V on both VDD1 and VDD2 - allows interoperability with 3.3 V microcontrollers and 5 V analog/power domains. |
| Fail-Safe Default | Low-output during power loss - prevents unintended activation of downstream drivers or relays in fault conditions. |
| CMTI | ≥35 kV/µs (typ. 50 kV/µs) - maintains signal integrity in noisy inverter switching environments with fast dV/dt transients. |
Pinout & Package
SI8650BD-B-ISR uses a 16-pin wide-body SOIC (WB SOIC-16) package with 8.3 mm creepage/clearance, supporting reinforced 5 kVRMS isolation. Pin assignments follow the Si8650 family layout with dedicated VDD1/GND1 and VDD2/GND2 pairs, five input pins (A1–A5), five output pins (B1–B5), one enable (EN), and two no-connect (NC) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A5 | Input signals (Side A) | Accept logic-level signals from MCU, FPGA, or sensor interface; Schmitt-triggered for >0.4 V hysteresis and noise margin. |
| B1–B5 | Isolated output signals (Side B) | Drive gate drivers, ADC/DAC control lines, or communication ICs on high-voltage side with 50 Ω nominal output impedance. |
| EN | Output enable control (Side B) | Active-high signal that places all B1–B5 outputs in high-impedance state when low - enables multiplexing or safe shutdown. |
| VDD1, GND1 | Input-side power supply | Power domain for A-side logic; bypass requires 0.1 µF capacitor placed adjacent to pins to suppress switching noise. |
| VDD2, GND2 | Output-side power supply | Independent 2.5–5.5 V rail for B-side; supports level-shifting and galvanic separation from control domain. |
| NC | No-connect | Not internally bonded - may be left floating, tied to GND, or tied to VDD2; no electrical function or thermal impact. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; enables 60-year lifetime at rated working voltage with stable timing over –40 to +125 °C. |
| Tri-state output control | Single EN pin disables all five outputs simultaneously into high-Z - simplifies system-level power sequencing and fault recovery. |
| Fail-safe low-default mode | Guarantees B1–B5 remain logic-low when VDD1 is unpowered - prevents false triggering of IGBT/MOSFET gates during brownout. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V / 100 Mbps - reduces heat generation and enables compact, fanless designs in enclosed inverters. |
| High CMTI & pulse width distortion | 50 kV/µs CMTI and ≤1.5 ns pulse width distortion - preserves signal fidelity in 100+ kHz switching applications like traction inverters. |
Applications
| Motor Control Systems | Isolated Switch-Mode Power Supplies |
|---|---|
|
Use Scenario: Isolating PWM signals from MCU to gate drivers in servo drives and industrial inverters. IC Role / Device Role / Timing Role: Five-channel unidirectional isolator transmitting dead-time-controlled PWM edges with <10 ns skew between channels. Use Value: Enables precise synchronous switching of half-bridge legs while blocking ground-loop noise and meeting IEC 61800-5-1 safety requirements. |
Use Scenario: Providing feedback isolation for secondary-side voltage/current sensing in LLC and phase-shifted full-bridge converters. IC Role / Device Role / Timing Role: Transmitting isolated ADC data and error flags across 5 kVRMS barrier with fail-safe low default during primary-side power loss. Use Value: Maintains closed-loop regulation integrity and prevents uncontrolled output rise during AC dropout or rectifier faults. |
| Battery Management Systems (BMS) | Traction Inverters |
|
Use Scenario: Isolating cell monitoring IC communication and pack contactor control signals in EV battery packs. IC Role / Device Role / Timing Role: Delivering isolated UART/ISO-7816 signals and relay drive commands with AEC-Q100 qualification and 125 °C operation. Use Value: Meets ASIL-B functional safety requirements for contactor control while surviving automotive thermal cycling and vibration. |
Use Scenario: Isolating gate drive signals and current-sense feedback in 400 V/800 V electric vehicle traction inverters. IC Role / Device Role / Timing Role: Transmitting high-speed PWM and DESAT fault signals with 50 kV/µs CMTI to withstand 5 kV DC bus transients. Use Value: Prevents shoot-through and false fault trips during high-dV/dt switching events, improving inverter reliability and efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141DBRZ | 4-channel, 150 Mbps, 3.75 kVRMS, SOIC-16 narrow body; no fail-safe default selection; higher 7.5 mA/channel @100 Mbps. | Limited to 4 channels and lower isolation rating; lacks configurable fail-safe output state. | Choose when 4-channel count suffices and 3.75 kVRMS meets system safety margin; verify UVLO thresholds match host controller behavior. |
| ISO6741QDWR | 4-channel, 50 Mbps, 5 kVRMS, SOIC-16 wide body; fails high by default; AEC-Q100 qualified; 3.3 V only. | Lower speed limits use in high-frequency PWM; fixed high-fail-safe conflicts with low-enable gate drivers. | Prefer for cost-sensitive automotive BMS where 50 Mbps is adequate and high-default logic aligns with system architecture. |
Compared with ADUM141DBRZ and ISO6741QDWR, SI8650BD-B-ISR uniquely delivers five isolated channels, user-selectable low-fail-safe mode, and 150 Mbps performance within a 5 kVRMS wide-body SOIC - making it optimal for next-generation EV inverters and high-density industrial drives requiring channel count, speed, and safety flexibility.
Availability
SI8650BD-B-ISR is available at Aetrix Electronics and suitable for motor control systems, isolated switch-mode power supplies, battery management systems, and traction inverters requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for SI8650BD-B-ISR 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 leader in high-performance analog semiconductors, specializing in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
The Si865x family was designed specifically for high-reliability, high-speed digital isolation in safety-critical power conversion and electrified transportation systems - emphasizing low power, precise timing, and regulatory compliance.
FAQ
What is the isolation rating and safety certification status of SI8650BD-B-ISR?
SI8650BD-B-ISR provides 5 kVRMS reinforced insulation and is certified to UL 1577, VDE 0884-10, IEC 62368-1, IEC 60601-1, and GB4943.1. These approvals validate its suitability for medical, industrial, and automotive end-equipment requiring double or reinforced insulation barriers - confirmed in Skyworks' official datasheet revision 206455A.
Does SI8650BD-B-ISR support fail-safe operation, and how is it configured?
Yes, SI8650BD-B-ISR has a factory-configured fail-safe mode that defaults outputs B1–B5 to logic-low when VDD1 is unpowered. This behavior is fixed per ordering code ('BD' = low-default); it cannot be changed in-circuit. The feature ensures safe shutdown of downstream power devices during input-side power loss - critical for gate driver interfaces.
What are the supply voltage requirements for SI8650BD-B-ISR on each side?
SI8650BD-B-ISR supports independent 2.5–5.5 V operation on both VDD1 (input side) and VDD2 (output side). Each rail requires a local 0.1 µF bypass capacitor. Operation at 3.3 V on one side and 5 V on the other is fully supported - enabling seamless interfacing between mixed-voltage systems like 3.3 V MCUs and 5 V gate drivers.
How does the enable (EN) pin function on SI8650BD-B-ISR?
The EN pin on SI8650BD-B-ISR is an active-high control input on the output side (VDD2 domain) that places all five B1–B5 outputs into high-impedance state when driven low. When EN is high or left floating (internally pulled up), outputs follow A1–A5. This enables centralized shutdown, multiplexing, or hot-swap sequencing without modifying input signals.
Is SI8650BD-B-ISR qualified for automotive applications?
SI8650BD-B-ISR is not an automotive-grade part - it carries the '-I' industrial suffix ('IS' = Industrial, 'R' = tape-and-reel). Automotive variants exist (e.g., SI8650BD-AS), but SI8650BD-B-ISR itself is rated for industrial use from –40 to +125 °C and qualified to JEDEC standards, not AEC-Q100. For automotive deployment, select the '-AS' version.
SI8650BD-B-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 5
- Inputs - Side 1/Side 2:
- 5/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8650BD-B-ISR FAQ
1.How can I place an order for SI8650BD-B-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8650BD-B-ISR 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 SI8650BD-B-ISR reliable?
The price and inventory of SI8650BD-B-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8650BD-B-ISR is usually 5 days.
3.What payment methods are accepted for SI8650BD-B-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8650BD-B-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8650BD-B-ISR?
SI8650BD-B-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8650BD-B-ISR 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 SI8650BD-B-ISR?
For technical support, including SI8650BD-B-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8650BD-B-ISR requirements.
6.How does Aetrix verify that SI8650BD-B-ISR is sourced from the original manufacturer or authorized distributors?
All SI8650BD-B-ISR 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 SI8650BD-B-ISR meets industry standards.
7.What is the process for return or replacement of SI8650BD-B-ISR?
All SI8650BD-B-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8650BD-B-ISR, 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 SI8650BD-B-ISR part is unused and in its original packaging.
Return procedure for SI8650BD-B-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8650BD-B-ISR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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