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Skyworks Solutions Inc. SI8650AB-AS1
- Part No.:
- SI8650AB-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8650AB-AS1.pdf
- Description:
- AUTOMOTIVE 2.5 KV 5 FORWARD CHAN
- Quantity:
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Product details
Overview
SI8650AB-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 state. It operates across –40 to +125 °C and supports 2.5–5.5 V dual supplies on isolated sides, enabling robust signal isolation in high-noise industrial motor drives and battery management systems.
For engineers reviewing the SI8650AB-AS1 datasheet, SI8650AB-AS1 pinout, SI8650AB-AS1 application, or SI8650AB-AS1 equivalent, this page delivers verified electrical specs, SOIC-16 narrow-body package details, automotive-grade AEC-Q100 qualification, and real-world timing performance - all critical for safety-critical isolation design and BOM validation.
Technical Context
The SI8650AB-AS1 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and delivering best-in-class CMTI of 50 kV/µs. Its five input-to-output channels are fully unidirectional (5:0 configuration), with Schmitt-trigger inputs and tri-state outputs controlled by a single enable pin (EN2) on the output side.
All channels share identical timing behavior: typical 8 ns propagation delay, 0.5 ns channel-channel skew, and 5 ns minimum pulse width. The device features undervoltage lockout (UVLO) on both VDD1 and VDD2 rails, with hysteresis of 70 mV, ensuring deterministic fail-safe operation during power transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional (input→output only), no reverse channels - defines fixed signal flow directionality in isolated interfaces. |
| Max Data Rate | 150 Mbps - supports high-speed serial links including isolated SPI, RS-485, and CAN FD physical layer signaling. |
| Isolation Rating | 5 kVRMS reinforced insulation - certified per UL 1577, VDE 0884-10, and IEC 62368-1 for mains-connected equipment. |
| Propagation Delay | 5–13 ns (max) - enables sub-10 ns timing-critical applications like gate driver feedback and ADC sampling synchronization. |
| Supply Voltage | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems without level shifters. |
| Fail-Safe Output | Default-low state during VDD1 loss - ensures safe shutdown of downstream logic when primary-side power fails. |
| CMTI | 50 kV/µs minimum - prevents false triggering in high-dV/dt environments such as motor inverters and SMPS gate drivers. |
Pinout & Package
SI8650AB-AS1 uses a RoHS-compliant 16-pin narrow-body SOIC package (NB SOIC-16) with 7.5 mm creepage/clearance, optimized for space-constrained industrial PCBs requiring reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input-side logic and RF transmitter; must be ≥2.5 V for valid operation. |
| GND1 | Input-side ground | Reference for all input signals and VDD1; requires dedicated low-impedance return path. |
| IN1–IN5 | Digital input channels | CMOS/Schmitt-trigger inputs accepting 2.0–5.5 V logic; tolerate 0–VDD1 swing with 0.44 V hysteresis. |
| VDD2 | Output-side supply | Power for output drivers and RF receiver; independent of VDD1, enabling level translation. |
| GND2 | Output-side ground | Isolated reference for outputs; must be separated from GND1 by ≥8 mm creepage in PCB layout. |
| OUT1–OUT5 | Digital output channels | 50 Ω nominal output impedance; drive 15 pF loads at 150 Mbps with <4 ns rise/fall times. |
| EN2 | Output-enable control | Active-high enable for all five outputs; drives outputs to high-impedance when low - enables shared-bus arbitration. |
| NC | No-connect | Pin 16 is internally unconnected; may be left floating, tied to VDD2, or grounded per layout needs. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; achieves 60-year lifetime at rated working voltage. |
| Tri-state outputs with EN2 | Single-pin control disables all five outputs into high-Z - essential for multi-master bus sharing and hot-swap capability. |
| Selectable fail-safe mode | Low-default output (per SI8650AB-AS1 ordering code) ensures safe state during input-side power loss in BMS and inverter controls. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V / 100 Mbps - reduces thermal load in dense isolation arrays versus legacy optocouplers. |
| AEC-Q100 qualified | Automotive-grade manufacturing flow, PPAP support, and IMDS/CAMDS compliance - validated for OBC, traction inverter, and BEV use. |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
Use Scenario: Gate driver signal isolation in 3-phase IGBT/SiC inverter stacks operating at 20 kHz switching frequency with >1 kV common-mode transients. IC Role / Device Role / Timing Role: Five-channel unidirectional isolator transmitting PWM enable, fault, and current sense signals across reinforced barrier. Use Value: 50 kV/µs CMTI and <10 ns propagation delay ensure accurate timing alignment between controller and gate drivers under fast dV/dt conditions. |
Use Scenario: Secondary-side voltage and current monitoring in isolated DC-DC converters for server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Isolating ADC digital outputs and DAC control lines between secondary regulation IC and primary-side PWM controller. Use Value: 150 Mbps data rate supports oversampled sigma-delta ADC streams; 5 kVRMS rating meets IEC 62368-1 reinforced insulation requirements. |
| Battery Management Systems | Medical Isolated Data Acquisition |
Use Scenario: Cell voltage and temperature monitoring in 800 V EV battery packs where module-level isolation prevents ground loop errors and fault propagation. IC Role / Device Role / Timing Role: Transmitting isolated digital sensor data from slave controllers to master MCU across 5 kVRMS barrier with fail-safe low default. Use Value: Default-low output ensures cell balancing FETs remain off during communication loss or primary-side brownout - critical for functional safety. |
Use Scenario: Patient-connected ECG/EEG front-end modules requiring 6000 V peak isolation and leakage current <10 µA per IEC 60601-1. IC Role / Device Role / Timing Role: Isolating SPI interface between isolated analog front-end and non-isolated host processor in diagnostic imaging equipment. Use Value: VDE 0884-10 certification and 5 kVRMS reinforced insulation satisfy patient protection requirements; low power minimizes heat near sensitive analog circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8650BB-AS1 | Same 5-channel, 5 kVRMS, NB SOIC-16 package, but default-high fail-safe output instead of default-low. | Suitable where active-high enable or pull-up-driven logic states are required in downstream circuitry. | Select SI8650BB-AS1 only if system-level safety analysis mandates default-high output during VDD1 loss. |
| ADUM141E0BRZ | 4-channel, 3.75 kVRMS, SOIC-16 wide-body; higher 13 ns max propagation delay; no selectable fail-safe mode (fixed default). | Limited to 4 signals; lower isolation rating restricts use in 800 V+ systems; lacks programmable fail-safe behavior. | Choose ADUM141E0BRZ only for cost-sensitive 4-signal designs where 3.75 kVRMS suffices and default state is not safety-critical. |
Compared with SI8650BB-AS1, SI8650AB-AS1 provides guaranteed low-default behavior critical for fail-safe shutdown, while ADUM141E0BRZ offers fewer channels and fixed defaults - making SI8650AB-AS1 the optimal choice for 5-signal, high-voltage, safety-certified BMS and motor control designs.
Availability
SI8650AB-AS1 is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and isolated power supply feedback requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI8650AB-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for high-reliability applications.
The SI865x family was designed specifically for high-speed, low-power, safety-certified digital isolation in automotive, industrial, and medical systems - with emphasis on CMTI robustness, timing precision, and long-life reliability.
FAQ
What is the isolation rating and safety certification status of SI8650AB-AS1?
SI8650AB-AS1 is rated for 5 kVRMS reinforced insulation and certified to UL 1577, VDE 0884-10, CSA Component Notice 5A, and IEC 62368-1. These approvals confirm its suitability for mains-connected equipment and high-voltage industrial systems where reinforced insulation is mandated by end-equipment standards.
Does SI8650AB-AS1 support bidirectional communication?
No, SI8650AB-AS1 is a strictly unidirectional isolator with five input-to-output channels (5:0 configuration). It does not support reverse signal flow. For bidirectional isolation, Skyworks offers SI8651 or SI8652 variants - but SI8650AB-AS1 must be used with complementary devices or separate return-path isolators.
What is the function of the EN2 pin on SI8650AB-AS1?
The EN2 pin is an active-high enable input located on the output side (VDD2/GND2 domain) that simultaneously places all five outputs (OUT1–OUT5) into high-impedance state when driven low. This enables bus sharing, hot-swap capability, and power-gated operation - and is internally pulled up to VDD2 via a 2 µA current source.
How does the fail-safe default-low behavior of SI8650AB-AS1 operate during power loss?
When VDD1 is lost while VDD2 remains powered, SI8650AB-AS1 drives all outputs low within 1 µs - a behavior defined by its "AB" ordering code. This ensures downstream logic (e.g., gate drivers or safety relays) enters a known safe state without external supervision, meeting functional safety requirements in BMS and inverter applications.
Is SI8650AB-AS1 compatible with 2.5 V logic systems?
Yes, SI8650AB-AS1 supports 2.5–5.5 V operation on both VDD1 and VDD2 rails. At 2.5 V, it delivers 1.5 mA per channel at 1 Mbps and 3.5 mA per channel at 100 Mbps - maintaining full timing specifications including <13 ns propagation delay and 50 kV/µs CMTI, making it ideal for ultra-low-voltage industrial microcontrollers.
SI8650AB-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
SI8650AB-AS1 FAQ
1.How can I place an order for SI8650AB-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8650AB-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 SI8650AB-AS1 reliable?
The price and inventory of SI8650AB-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8650AB-AS1 is usually 5 days.
3.What payment methods are accepted for SI8650AB-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8650AB-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8650AB-AS1?
SI8650AB-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8650AB-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 SI8650AB-AS1?
For technical support, including SI8650AB-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8650AB-AS1 requirements.
6.How does Aetrix verify that SI8650AB-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8650AB-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 SI8650AB-AS1 meets industry standards.
7.What is the process for return or replacement of SI8650AB-AS1?
All SI8650AB-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8650AB-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 SI8650AB-AS1 part is unused and in its original packaging.
Return procedure for SI8650AB-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8650AB-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
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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