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Skyworks Solutions Inc. SI8655BA-AS1
- Part No.:
- SI8655BA-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8655BA-AS1.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:2,590
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Product details
Overview
SI8655BA-AS1 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 –40 to +125 °C and supports dual supply voltages (2.5–5.5 V) on isolated sides, enabling robust signal isolation in high-noise industrial motor control and battery management systems.
For engineers reviewing the SI8655BA-AS1 datasheet, SI8655BA-AS1 pinout, SI8655BA-AS1 application, or SI8655BA-AS1 equivalent, key selection considerations include its 5 kVRMS wide-body SOIC-16 package, automotive-grade AEC-Q100 qualification, Schmitt-trigger input noise immunity, and tri-state enable control for power-sensitive system-level isolation.
Technical Context
The SI8655BA-AS1 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and delivering deterministic timing. Its five channels are all input-side (VDD1) to output-side (VDD2) unidirectional, with no enable pins (EN1/EN2 not implemented per Si8655 family definition), and default-low fail-safe behavior during input-side power loss.
All channels feature Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ), 50 Ω nominal output impedance, and guaranteed CMTI ≥50 kV/µs. Propagation delay skew is ≤2.5 ns (channel-to-channel) and ≤4.5 ns (unit-to-unit), supporting precise timing in synchronized gate-drive or ADC sampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, input-to-output only - enables full isolation of control signals without bidirectional complexity. |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI clocked up to 75 MHz or fast PWM feedback loops. |
| Isolation Rating | 5 kVRMS reinforced - certified to UL 1577, VDE 0884-10, IEC 62368-1, and GB4943.1 for safety-critical mains-connected systems. |
| Propagation Delay | 8.0 ns typ (≤13 ns max) - ensures sub-10 ns timing alignment critical for synchronous motor phase control and isolated ADC triggering. |
| Supply Voltage | 2.5–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Fail-Safe Default | Low output on VDD1 loss - prevents unintended activation of downstream drivers or switches during brown-out conditions. |
| CMTI | ≥50 kV/µs - maintains signal integrity in high-dV/dt environments such as IGBT gate drive circuits and inverter switching nodes. |
Pinout & Package
SI8655BA-AS1 is housed in a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16) with 7.5 mm creepage/clearance, supporting reinforced insulation up to 5 kVRMS. Pin assignments follow the Si8655 functional layout with dedicated VDD1/GND1 (pins 1–2, 15–16) and VDD2/GND2 (pins 9–10, 12–13) domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 (Pin 1) | Input-side power supply | Supplies logic and transmitter circuitry; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 (Pin 2) | Input-side ground reference | Return path for VDD1; requires low-inductance connection to isolate noise coupling into isolation barrier. |
| INA1–INA5 (Pins 3–7) | Input signal terminals | Schmitt-trigger buffered inputs accepting 2.0–5.5 V logic; tolerant of slow edges and EMI. |
| VDD2 (Pin 9) | Output-side power supply | Supplies receiver and output driver; independent of VDD1 for true galvanic isolation. |
| GND2 (Pin 10) | Output-side ground reference | Isolated return for VDD2; must be physically separated from GND1 per creepage requirements. |
| OUTB1–OUTB5 (Pins 11, 14, 15, 16, 13) | Isolated output terminals | 50 Ω nominal drive strength; outputs default low when VDD1 is unpowered (fail-safe mode). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; enables immediate operation after power-on without handshake or calibration. |
| Tri-state capable outputs | Outputs enter high-impedance state when EN is asserted low - supports bus sharing and dynamic channel disabling. |
| Selectable fail-safe mode | Factory-configured low-default output ensures safe deactivation of downstream power stages during input-side power failure. |
| AEC-Q100 qualified | Validated for automotive use at –40 to +125 °C with zero-defect manufacturing flow - suitable for on-board chargers and traction inverters. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V / 100 Mbps - reduces thermal load in densely packed power electronics enclosures. |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating PWM gate-drive signals between MCU and IGBT/SiC half-bridge drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Five-channel unidirectional isolator transmitting complementary PWM pairs and fault feedback with <10 ns skew. Use Value: Enables precise dead-time control and prevents shoot-through by maintaining sub-2.5 ns channel-to-channel skew across temperature. |
Use Scenario: Transmitting digitized sensor data from high-voltage DC-link voltage/current monitors to isolated MCU side. IC Role / Device Role / Timing Role: Isolating parallel or serial ADC output lines while preserving timing integrity for synchronized sampling. Use Value: 150 Mbps capability supports 16-bit ADCs sampled at >1 MSPS with full isolation of digital data paths. |
| Battery Management Systems | On-Board Chargers |
|
Use Scenario: Isolating cell voltage monitoring and balancing command signals between battery pack controller and module-level analog front-ends. IC Role / Device Role / Timing Role: Providing five independent isolation paths for voltage sensing, temperature reporting, and switch control in multi-module BMS stacks. Use Value: 5 kVRMS reinforced insulation meets IEC 62368-1 requirements for EV battery packs operating up to 1000 V DC. |
Use Scenario: Isolating communication and control signals between AC/DC PFC stage and DC/DC LLC stage in bi-directional OBCs. IC Role / Device Role / Timing Role: Transmitting gate timing, fault flags, and status bits across isolation barrier with <13 ns max propagation delay. Use Value: AEC-Q100 qualification and –40 to +125 °C operation ensure reliability in under-hood automotive charging environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8655BB-AS1 | Same 5-channel, 5 kVRMS, WB SOIC-16 package, but default-high fail-safe output. | Required where downstream logic expects active-high enable or reset signals during power loss. | Select SI8655BB-AS1 only if system-level safety analysis mandates high-default behavior on input-side undervoltage. |
| ADUM141E0BRZ | 4-channel, 3.75 kVRMS, narrow-body SOIC-16; higher 12 ns max propagation delay; no AEC-Q100 rating. | Limited to industrial automation where lower isolation voltage and non-automotive qualification are acceptable. | Choose ADUM141E0BRZ only when channel count and isolation voltage requirements are relaxed and automotive compliance is unnecessary. |
Compared with SI8655BB-AS1, SI8655BA-AS1 provides identical performance except for fail-safe polarity-critical for preventing false turn-on in high-side driver circuits. Versus ADUM141E0BRZ, SI8655BA-AS1 delivers higher channel count, reinforced 5 kVRMS isolation, and automotive qualification-enabling direct use in EV powertrain systems without redesign.
Availability
SI8655BA-AS1 is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and on-board chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI8655BA-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, high-speed digital isolation in automotive and industrial power electronics-emphasizing low power, precise timing, and safety-certified reinforced insulation.
FAQ
What is the isolation voltage rating of SI8655BA-AS1?
The SI8655BA-AS1 is rated for 5 kVRMS reinforced insulation per UL 1577, VDE 0884-10, and IEC 62368-1. This rating applies to the wide-body SOIC-16 package and is validated for continuous working voltage up to 1200 VDC in end-equipment complying with reinforced insulation requirements. SI8655BA-AS1 meets creepage and clearance standards for high-voltage industrial and automotive applications.
Does SI8655BA-AS1 support bidirectional communication?
No, SI8655BA-AS1 is strictly unidirectional: all five channels transmit from the input side (VDD1 domain) to the output side (VDD2 domain). It does not implement any reverse-path channels or enable pins for direction control. For bidirectional isolation, designers must pair SI8655BA-AS1 with a complementary device or select a different family member such as Si866x.
What is the default output state of SI8655BA-AS1 during power loss?
SI8655BA-AS1 is factory-configured with a fail-safe low-default output mode. When VDD1 is unpowered (e.g., during brown-out or shutdown), all five outputs (OUTB1–OUTB5) drive low if VDD2 remains powered - ensuring safe deactivation of downstream drivers or switches. This behavior is fixed per ordering code "BA" and cannot be changed in-circuit.
Is SI8655BA-AS1 qualified for automotive applications?
Yes, SI8655BA-AS1 carries the "-A" suffix indicating full AEC-Q100 Grade 1 qualification (–40 to +125 °C), automotive-specific manufacturing flow, AIAG-compliant PPAP documentation, and IMDS/CAMDS material declarations. It is approved for use in on-board chargers, battery management systems, and traction inverters per automotive OEM requirements.
What bypass capacitors are required for SI8655BA-AS1?
SI8655BA-AS1 requires a 0.1 µF ceramic bypass capacitor placed as close as possible between VDD1 and GND1, and another between VDD2 and GND2. These capacitors stabilize local supply rails and suppress high-frequency noise coupling across the isolation barrier. Additional bulk capacitance (e.g., 1–10 µF tantalum) may be added near each supply rail depending on PCB layout and load transients.
SI8655BA-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:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- 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:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8655BA-AS1 FAQ
1.How can I place an order for SI8655BA-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8655BA-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 SI8655BA-AS1 reliable?
The price and inventory of SI8655BA-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8655BA-AS1 is usually 5 days.
3.What payment methods are accepted for SI8655BA-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8655BA-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8655BA-AS1?
SI8655BA-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8655BA-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 SI8655BA-AS1?
For technical support, including SI8655BA-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8655BA-AS1 requirements.
6.How does Aetrix verify that SI8655BA-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8655BA-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 SI8655BA-AS1 meets industry standards.
7.What is the process for return or replacement of SI8655BA-AS1?
All SI8655BA-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8655BA-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 SI8655BA-AS1 part is unused and in its original packaging.
Return procedure for SI8655BA-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8655BA-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
-
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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