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Skyworks Solutions Inc. SI8655BB-AS1
- Part No.:
- SI8655BB-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8655BB-AS1.pdf
- Description:
- AUTOMOTIVE 2.5 KV 5-CHANNEL DIGI
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
SI8655BB-AS1 from Skyworks is a five-channel, automotive-grade digital isolator with 2.5 kVRMS reinforced isolation, 150 Mbps data rate, and fail-safe low-default output state. It features Schmitt-trigger inputs, tri-state outputs with enable control, and operates across –40 to +125 °C for use in battery management systems and traction inverters.
For engineers reviewing the SI8655BB-AS1 datasheet, SI8655BB-AS1 pinout, SI8655BB-AS1 application, or SI8655BB-AS1 equivalent, this page delivers verified electrical specs, package mapping to narrow-body SOIC-16, timing performance (8 ns typical propagation delay), isolation certification (UL, VDE, CQC), and automotive qualification (AEC-Q100).
Technical Context
The SI8655BB-AS1 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity. Its architecture supports independent undervoltage lockout (UVLO) on both sides, with 2.24 V rising threshold and 70 mV hysteresis per supply rail.
All five channels are unidirectional from VDD1-side inputs (A1–A5) to VDD2-side outputs (B1–B5); no enable pins are present (EN1/EN2 omitted per Si8655 family definition). The device uses internal 50 Ω output impedance and supports 15 pF load-driven timing at up to 150 Mbps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, input-side (VDD1) to output-side (VDD2) |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and CAN FD physical layer signaling |
| Propagation Delay | 8 ns typical - enables tight timing budgets in motor control gate drivers and isolated ADC sampling |
| Isolation Rating | 2.5 kVRMS - certified per UL 1577, VDE 0884-10, and CQC GB4943.1 for reinforced insulation |
| Supply Voltage | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems |
| Fail-Safe Default | Low output during VDD1 loss - ensures safe shutdown of downstream power stages in BMS applications |
| CMTI | 50 kV/µs - maintains signal integrity in high-dV/dt environments such as IGBT/SiC inverter switching |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package, RoHS-compliant, 260 °C peak reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry for A1–A5 inputs; UVLO active below 2.24 V |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8 mm creepage for 2.5 kVRMS compliance |
| A1–A5 | Input signals (Side A) | Schmitt-triggered, 1.23–1.67 V thresholds; tolerate 0–5.5 V logic levels regardless of VDD1 |
| VDD2 | Output-side power supply | Supplies receiver and output driver circuitry for B1–B5; independent UVLO monitoring |
| GND2 | Output-side ground reference | Isolated return for VDD2; forms safety barrier between primary and secondary domains |
| B1–B5 | Output signals (Side B) | 50 Ω nominal output impedance; drive 15 pF loads at 150 Mbps with ≤4 ns rise/fall times |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift issues inherent in optocouplers; enables 60-year life at rated voltage |
| Automotive-grade manufacturing | Full AEC-Q100 qualification with AIAG-compliant PPAP, IMDS/CAMDS support, and zero-defect methodology |
| Fail-safe low-default mode | Guarantees B1–B5 remain logic-low during VDD1 brownout-critical for disabling gate drivers in EV traction inverters |
| Ultra-low power at 1 Mbps | 1.5 mA/channel @ 2.5 V, 1.6 mA/channel @ 5 V - reduces thermal load in sealed battery enclosures |
| High CMTI immunity | 50 kV/µs common-mode transient rejection - prevents false triggering in noisy 800 V DC-link environments |
Applications
| Battery Management Systems (BMS) | Traction Inverters |
|---|---|
|
Use Scenario: Isolating cell voltage monitor ICs and MCU communication in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Five-channel isolator transmitting ADC readings and fault signals across high-voltage barrier with <8 ns skew. Use Value: Enables real-time cell balancing and thermal runaway detection while meeting ASIL-D functional safety requirements via reinforced 2.5 kVRMS isolation. |
Use Scenario: Level-shifting PWM signals from MCU to isolated gate drivers in SiC-based motor inverters. IC Role / Device Role / Timing Role: Transmitting five independent gate control signals with precise channel-to-channel timing (<2.5 ns skew). Use Value: Maintains synchronous switching of half-bridge legs under 50 kV/µs transients, preventing shoot-through failures. |
| On-Board Chargers (OBC) | Industrial Motor Drives |
|
Use Scenario: Isolating digital control signals between AC/DC and DC/DC stages in bidirectional OBCs. IC Role / Device Role / Timing Role: Providing galvanic separation for feedback loops, enable signals, and status reporting across 2.5 kVRMS barrier. Use Value: Supports UL/IEC 62368-1 system certification with single-component reinforced insulation-reducing BOM count vs. dual-capacitor solutions. |
Use Scenario: Interfacing PLC controllers to isolated current/voltage sensors and IGBT gate drivers in HVAC compressors. IC Role / Device Role / Timing Role: Delivering synchronized control signals with sub-10 ns propagation delay and fail-safe low default. Use Value: Ensures immediate shutdown of power stage upon controller reset or supply loss-meeting IEC 61800-5-1 safety stop requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8655BB-B-IS1 | Industrial-grade (–I suffix), identical pinout and electrical specs; lacks AEC-Q100 qualification and PPAP documentation | Approved for industrial automation but not automotive production; unsuitable for OEM BMS or traction inverter programs | Select SI8655BB-B-IS1 only for cost-sensitive non-automotive designs where automotive traceability is unnecessary |
| ADUM141D1BRZ | Four-channel, 150 Mbps, 3.75 kVRMS; different pinout (SOIC-16 wide), higher 5.5 mA/channel @ 100 Mbps | Requires PCB redesign due to different channel count and package; higher power draw limits use in thermally constrained modules | Choose ADUM141D1BRZ only when 3.75 kVRMS rating is mandatory and five-channel functionality is not required |
Compared with SI8655BB-B-IS1, the SI8655BB-AS1 adds automotive process controls and documentation without altering timing or isolation specs; versus ADUM141D1BRZ, it offers one extra channel and lower power in the same narrow-body footprint but at a lower isolation rating.
Availability
SI8655BB-AS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply across automotive production lifecycles.
Supply support for SI8655BB-AS1 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 automotive and industrial isolation needs-emphasizing AEC-Q100 compliance, 60-year lifetime, and RF-based noise immunity over legacy optocoupler architectures.
FAQ
What is the isolation rating and safety certification status of the SI8655BB-AS1?
The SI8655BB-AS1 provides 2.5 kVRMS reinforced isolation and is certified to UL 1577, VDE 0884-10, CSA Component Notice 5A, and CQC GB4943.1. These approvals validate its use in safety-critical automotive systems including battery management and traction inverters where reinforced insulation is mandated.
Does the SI8655BB-AS1 require startup initialization or configuration?
No-the SI8655BB-AS1 requires no startup initialization or register configuration. It begins transmitting valid data within 40 µs of VDD1/VDD2 reaching UVLO threshold, with outputs following inputs immediately after start-up time. This simplifies firmware design and eliminates boot-time uncertainty in safety-critical applications.
How does the fail-safe low-default mode function in the SI8655BB-AS1?
When VDD1 is unpowered or drops below UVLO, the SI8655BB-AS1 forces all five outputs (B1–B5) to logic-low while VDD2 remains powered. This behavior is hardwired per ordering option ("BB" suffix denotes low-default) and ensures safe deactivation of downstream power devices during input-side supply faults.
What are the supply voltage requirements for reliable operation of the SI8655BB-AS1?
The SI8655BB-AS1 operates with VDD1 and VDD2 independently rated from 2.5 V to 5.5 V. Each supply has its own UVLO circuit (2.24 V rising threshold), allowing asymmetric operation-for example, 3.3 V on VDD1 for MCU interfacing and 5 V on VDD2 for driving gate drivers-without timing degradation.
Is the SI8655BB-AS1 pin-compatible with other members of the Si865x family?
Yes-the SI8655BB-AS1 shares identical pinout and package (NB SOIC-16) with all Si8650/51/52/55 variants in narrow-body SOIC-16. Channel count and directionality differ across models (e.g., Si8651BB-AS1 has 4 inputs/1 output), but PCB layout and footprint remain interchangeable for drop-in replacement within the same package variant.
SI8655BB-AS1 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:
- 5
- Inputs - Side 1/Side 2:
- 5/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8655BB-AS1 FAQ
1.How can I place an order for SI8655BB-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8655BB-AS1 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 SI8655BB-AS1 reliable?
The price and inventory of SI8655BB-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8655BB-AS1 is usually 5 days.
3.What payment methods are accepted for SI8655BB-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8655BB-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8655BB-AS1?
SI8655BB-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8655BB-AS1 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 SI8655BB-AS1?
For technical support, including SI8655BB-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8655BB-AS1 requirements.
6.How does Aetrix verify that SI8655BB-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8655BB-AS1 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 SI8655BB-AS1 meets industry standards.
7.What is the process for return or replacement of SI8655BB-AS1?
All SI8655BB-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8655BB-AS1, 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 SI8655BB-AS1 part is unused and in its original packaging.
Return procedure for SI8655BB-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8655BB-AS1 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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