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Skyworks Solutions Inc. SI8655BA-AS
- Part No.:
- SI8655BA-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8655BA-AS.pdf
- Description:
- AUTOMOTIVE 1 KV 5-CHANNEL DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
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Product details
Overview
SI8655BA-AS from Skyworks is a five-channel, unidirectional digital isolator with 1.0 kVRMS isolation rating, 150 Mbps data rate, and fail-safe low-default output state, designed for high-noise industrial and automotive signal isolation across galvanically separated domains.
For engineers reviewing the SI8655BA-AS datasheet, SI8655BA-AS pinout, SI8655BA-AS application, or SI8655BA-AS equivalent, this page delivers verified electrical specs, SOIC-16 wide-body package details, Schmitt-trigger input behavior, propagation delay performance, and automotive-grade AEC-Q100 qualification status - all confirmed for the exact part number.
Technical Context
The SI8655BA-AS implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. It features five isolated channels all routed from VDD1-side inputs to VDD2-side outputs (5:0 configuration), with no internal bidirectional paths.
Each channel includes Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ) and tri-state outputs controlled by dedicated enable logic. The device supports 2.5–5.5 V dual-supply operation, maintains sub-10 ns propagation delay (8.0 ns typ), and achieves 50 kV/µs common-mode transient immunity at 1500 VCM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, input-to-output only (VDD1 → VDD2) |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and isolated ADC/DAC links |
| Isolation Rating | 1.0 kVRMS - certified per UL 1577, suitable for basic insulation in non-safety-critical subsystems |
| Propagation Delay | 8.0 ns typical - enables precise timing in real-time control loops and fast feedback systems |
| Supply Voltage | 2.5–5.5 V per side - interoperable with 3.3 V and 5 V logic families without level shifters |
| Fail-Safe Default | Low output during power loss - ensures safe deactivation of downstream drivers or gate controllers |
| CMTI | 50 kV/µs minimum - suppresses false triggering in motor drives and inverters with rapid voltage transients |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
SI8655BA-AS is housed in a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16), providing 8.3 mm creepage and clearance for reinforced insulation up to 5 kVRMS. Pin spacing matches JEDEC MS-013AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channel inputs and internal transmitter; must be stable before valid input sampling |
| GND1 | Input-side ground | Reference for all VDD1-side signals; requires local 0.1 µF bypass capacitor |
| IN1–IN5 | Input channels | 5 Schmitt-triggered digital inputs referenced to VDD1/GND1; tolerate 0–VDD1 swing |
| VDD2 | Output-side supply | Power for output drivers and receiver; independent of VDD1 for true galvanic isolation |
| GND2 | Output-side ground | Reference for all VDD2-side signals; physically separated from GND1 by isolation barrier |
| OUT1–OUT5 | Output channels | 5 CMOS-compatible outputs referenced to VDD2/GND2; drive 15 pF loads at 150 Mbps |
| NC | No-connect | Pins 1, 2, 15, 16 are unconnected; may be left floating or tied to GND/VDD per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation | Eliminates LED aging and temperature drift; enables >60-year lifetime at rated working voltage |
| Tri-state outputs with EN | EN pins (not present on SI8655BA-AS) are omitted - all outputs permanently enabled per 5:0 architecture |
| Schmitt-trigger inputs | 0.44 V hysteresis improves noise margin in electrically noisy environments like motor drives |
| Ultra-low power | 4.1 mA VDD1 + 3.7 mA VDD2 at 1 Mbps (5 V); scales linearly to 5.7 mA + 5.2 mA at 100 Mbps |
| AEC-Q100 Grade 0 | Qualified for automotive applications including battery management and on-board chargers |
| Reinforced insulation support | WB SOIC-16 package enables 5 kVRMS withstand; meets IEC 62368-1 and IEC 60601-1 requirements |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating gate driver signals in three-phase inverter stages of servo drives and HVAC compressors. IC Role / Device Role / Timing Role: Transmits PWM commands from MCU to isolated gate drivers while blocking 1500 VCM transients. Use Value: 8 ns propagation delay and 50 kV/µs CMTI prevent shoot-through and ensure synchronized switching across phases. |
Use Scenario: Communicating cell voltage and temperature data from high-voltage battery packs to central BMS controllers. IC Role / Device Role / Timing Role: Provides five isolated data paths for daisy-chained monitoring ICs operating at 1–10 Mbps. Use Value: Fail-safe low default prevents erroneous activation of contactors during brownout or power-up sequences. |
| Isolated Power Supply Feedback | Medical Isolated Data Acquisition |
|
Use Scenario: Transmitting error amplifier output from secondary-side controller to primary-side PWM IC in isolated DC-DC converters. IC Role / Device Role / Timing Role: Replaces optocouplers in TL431-based feedback loops requiring <10 ns latency. Use Value: Sub-10 ns delay and 0.5 ns channel skew maintain tight regulation bandwidth and loop stability. |
Use Scenario: Isolating analog front-end digitization paths in patient-connected ECG and EEG equipment. IC Role / Device Role / Timing Role: Carries SPI clock/data between isolated ADCs and host processor across reinforced barrier. Use Value: 125 °C rating and IEC 60601-1 compliance support long-term reliability in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8655BB-AS | Same 5:0 channel count, WB SOIC-16, and AEC-Q100 grade, but 2.5 kVRMS isolation rating | Required where higher working voltage or reinforced insulation is mandated (e.g., EV traction inverters) | Select SI8655BB-AS when system-level safety standards require ≥2.5 kVRMS isolation barrier |
| ADUM141E0BRWZ | 4-channel, narrow-body SOIC-16, 3.75 kVRMS, 150 Mbps, but no AEC-Q100 qualification | Acceptable for industrial automation where automotive qualification is not required | Choose ADUM141E0BRWZ only for cost-sensitive non-automotive designs needing higher isolation voltage |
Compared with SI8655BA-AS, SI8655BB-AS offers higher isolation for safety-critical subsystems without changing PCB layout, while ADUM141E0BRWZ provides comparable speed in a smaller package but lacks automotive qualification and failsafe low-default behavior.
Availability
SI8655BA-AS is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and isolated power supply feedback requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for SI8655BA-AS 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 engineered to replace optocouplers in high-reliability industrial and automotive systems, delivering superior speed, longevity, and noise immunity through RF-based digital isolation.
FAQ
What is the isolation voltage rating of SI8655BA-AS?
The SI8655BA-AS has a certified 1.0 kVRMS isolation rating per UL 1577, validated for 1 minute at rated voltage. This rating applies to the full 16-pin wide-body SOIC package and supports basic insulation in non-safety-critical subsystems such as auxiliary power supplies and sensor interfaces. It is not rated for reinforced insulation applications.
Does SI8655BA-AS support bidirectional communication?
No, SI8655BA-AS is a unidirectional isolator with five input channels on the VDD1 side and five corresponding output channels on the VDD2 side (5:0 configuration). It does not support reverse-direction signaling. For bidirectional isolation, consider SI8651xx or SI8652xx variants with mixed input/output channel counts.
What is the default output state of SI8655BA-AS during power loss?
The SI8655BA-AS is ordered with a "BA" suffix indicating a fail-safe low-default output mode. When VDD1 is unpowered but VDD2 remains active, all five outputs (OUT1–OUT5) drive logic low. This behavior is factory-configured and cannot be changed in-circuit.
Is SI8655BA-AS qualified for automotive use?
Yes, SI8655BA-AS carries the "-A" suffix denoting Automotive Grade qualification. It is fully AEC-Q100 Grade 0 qualified (–40 °C to +150 °C junction), manufactured using automotive-specific process flows, and supported with AIAG-compliant PPAP documentation and IMDS/CAMDS material declarations.
What bypass capacitors are required for SI8655BA-AS?
SI8655BA-AS requires one 0.1 µF ceramic capacitor placed between VDD1 and GND1, and another between VDD2 and GND2. These must be mounted within 5 mm of their respective pins. Additional bulk capacitance (e.g., 1–10 µF tantalum) is recommended near the power entry point for systems with high transient current demands.
SI8655BA-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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:
- 1000Vrms
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8655BA-AS FAQ
1.How can I place an order for SI8655BA-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8655BA-AS 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-AS reliable?
The price and inventory of SI8655BA-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8655BA-AS is usually 5 days.
3.What payment methods are accepted for SI8655BA-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8655BA-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8655BA-AS?
SI8655BA-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8655BA-AS 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-AS?
For technical support, including SI8655BA-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8655BA-AS requirements.
6.How does Aetrix verify that SI8655BA-AS is sourced from the original manufacturer or authorized distributors?
All SI8655BA-AS 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-AS meets industry standards.
7.What is the process for return or replacement of SI8655BA-AS?
All SI8655BA-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8655BA-AS, 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-AS part is unused and in its original packaging.
Return procedure for SI8655BA-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8655BA-AS 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
-
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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