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Skyworks Solutions Inc. SI8635BT-IS
- Part No.:
- SI8635BT-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8635BT-IS.pdf
- Description:
- DGTL ISO 5000VRMS 3CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
SI8635BT-IS from Skyworks is a triple-channel, unidirectional digital isolator with 3 input channels on VDD1 side and 0 on VDD2 side, rated for 5 kVRMS reinforced isolation in a wide-body SOIC-16 package. It supports up to 150 Mbps data rate, achieves ≤13 ns propagation delay, features selectable fail-safe low-default output, and operates across –40°C to +125°C for industrial power inverters and isolated ADC interfaces.
For engineers reviewing the SI8635BT-IS datasheet, SI8635BT-IS pinout, SI8635BT-IS application, or SI8635BT-IS equivalent, this page delivers verified electrical specs, validated package dimensions, confirmed fail-safe behavior, and real-world timing performance - all specific to the SI8635BT-IS variant with 5 kVRMS rating and wide-body SOIC-16 packaging.
Technical Context
The SI8635BT-IS implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture provides three independent isolated signal paths from input side (VDD1) to output side (VDD2), with Schmitt-trigger inputs and no enable pins - consistent with Si8635 family design.
All channels are unidirectional (A→B only), with default-low fail-safe mode activated during input-side power loss while output-side supply remains active. The device meets reinforced insulation requirements per VDE 0884-10 (10 kV surge capable) and UL 1577 (5 kVRMS), supporting safety-critical industrial and automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels & Direction | 3 unidirectional channels (VDD1 → VDD2); no reverse or bidirectional capability |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI clock lines or isolated UART at full throughput |
| Propagation Delay | ≤13 ns max - enables tight timing budgets in motor control gate drivers and real-time feedback loops |
| Isolation Rating | 5 kVRMS reinforced - certified to VDE 0884-10 and UL 1577, suitable for mains-connected industrial equipment |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems |
| Fail-Safe Default | Low-output state during VDD1 loss - prevents undefined logic states in power-loss scenarios for safety-critical outputs |
| CMTI | ≥60 kV/µs - ensures reliable operation in high-noise environments such as variable-frequency drives and EV traction inverters |
Pinout & Package
SI8635BT-IS uses a RoHS-compliant 16-pin wide-body SOIC package (7.5 mm creepage/clearance), optimized for reinforced insulation and high-voltage system separation. Pin assignments follow standard Si8635 layout with dedicated VDD1/GND1 and VDD2/GND2 pairs, plus three isolated output channels (B1–B3) and corresponding inputs (A1–A3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | A1, A2, A3, GND1 | Input-side signal inputs and ground reference; Schmitt-triggered for noise rejection |
| 5, 6, 7, 8 | VDD1, NC, NC, NC | Input-side power supply; pins 6–8 are no-connect (not internally bonded) |
| 9, 10, 11, 12 | B1, B2, B3, GND2 | Output-side isolated outputs and ground; drive 15 pF loads with 50 Ω nominal impedance |
| 13, 14, 15, 16 | VDD2, NC, NC, NC | Output-side power supply; pins 14–16 are no-connect (not internally bonded) |
Key Features
| Feature | Design Value |
|---|---|
| No-startup initialization | Operates immediately after VDD stabilization - eliminates boot-time delays in safety-critical systems |
| Ultra-low power at 100 Mbps | ≤17.8 mA total supply current (VDD1+VDD2) at 5 V - reduces thermal load in dense PCB layouts |
| Precise channel matching | ≤2.5 ns channel-to-channel skew - maintains phase alignment across multi-signal isolation (e.g., 3-phase encoder feedback) |
| High CMTI immunity | ≥60 kV/µs common-mode transient immunity - sustains signal integrity during IGBT switching transients |
| Reinforced VDE 0884-10 | 10 kV surge capability - meets stringent insulation requirements for medical and EV battery management systems |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
|
Use Scenario: Gate driving for 3-phase IGBT inverters in servo drives and HVAC compressors. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU to gate driver ICs while maintaining <13 ns propagation delay and <2.5 ns channel skew. Use Value: Enables precise dead-time control and prevents shoot-through faults via deterministic timing and reinforced 5 kVRMS isolation. |
Use Scenario: Secondary-side voltage/current sensing feedback to primary-side controller in isolated DC-DC converters. IC Role / Device Role / Timing Role: Transmits analog-to-digital converter outputs across isolation barrier with sub-5 ns pulse width distortion. Use Value: Maintains regulation accuracy under fast load transients by preserving signal fidelity and rejecting >60 kV/µs common-mode noise. |
| EV Battery Management | Medical Isolated Data Acquisition |
|
Use Scenario: Cell voltage monitoring and pack-level communication in high-voltage battery packs (up to 1000 VDC). IC Role / Device Role / Timing Role: Provides reinforced 5 kVRMS isolation between battery stack sensors and central BMS controller. Use Value: Meets IEC 61010-1 and IEC 60601-1 reinforced insulation requirements while supporting 150 Mbps diagnostics bus speed. |
Use Scenario: Isolating ECG/EEG front-end ADCs from USB or Ethernet interface in patient-connected diagnostic equipment. IC Role / Device Role / Timing Role: Transfers digitized biopotential waveforms across isolation barrier with <350 ps peak jitter. Use Value: Preserves clinical signal integrity and satisfies 60950-1/60601-1 safety certifications for patient-applied parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8635BD-B-IS | Same 3-channel, 5 kVRMS, wide-body SOIC-16, but default-low output uses Si8635BD construction (non-T series); lower CMTI (50 kV/µs vs. 60 kV/µs) | Lacks VDE 0884-10 reinforcement; suitable for non-surge-critical industrial use only | Select SI8635BD-B-IS where cost sensitivity outweighs need for 10 kV surge immunity and highest CMTI |
| ADUM131D0BRWZ | Analog Devices 3-channel isolator, 3.75 kVRMS, narrow-body SOIC-16, 100 Mbps max, no VDE 0884-10 certification | Lower isolation rating and data rate; not qualified for reinforced insulation in medical/EV applications | Choose ADUM131D0BRWZ only for legacy designs requiring pin compatibility with older ADuM131x family |
Compared with SI8635BD-B-IS and ADUM131D0BRWZ, SI8635BT-IS uniquely combines 5 kVRMS reinforced isolation, VDE 0884-10 certification, 150 Mbps speed, and ≥60 kV/µs CMTI - making it the only option qualified for next-generation EV traction inverters and Class II medical devices requiring surge immunity.
Availability
SI8635BT-IS is available at Aetrix Electronics and suitable for industrial motor control, EV battery management systems, and medical isolated data acquisition requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SI8635BT-IS 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 Si863x family was designed specifically for high-reliability industrial and automotive isolation needs - delivering ultra-low power, precise timing, and reinforced safety certification in compact packages.
FAQ
What is the isolation rating and safety certification status of SI8635BT-IS?
SI8635BT-IS is certified for 5 kVRMS reinforced isolation per UL 1577 and VDE 0884-10, with 10 kV surge capability. It meets IEC 60950-1, IEC 61010-1, and IEC 60601-1 requirements, and carries CQC and CSA approvals - making SI8635BT-IS suitable for medical, industrial, and EV applications demanding highest insulation integrity.
Does SI8635BT-IS support bidirectional communication or enable functionality?
No. SI8635BT-IS provides three unidirectional channels (A1→B1, A2→B2, A3→B3) only, with no enable pins or reverse-path capability. Unlike Si8631 variants, SI8635BT-IS has no EN1/EN2 terminals - all channels operate continuously when powered, consistent with its fixed 3-input/0-output configuration.
What is the default output behavior of SI8635BT-IS during input-side power loss?
SI8635BT-IS is configured for fail-safe low-default output: when VDD1 is unpowered but VDD2 remains active, outputs B1–B3 drive logic low within 12 ns. This behavior is factory-set and cannot be changed in-circuit - ensuring predictable shutdown states in power-supply fault conditions for SI8635BT-IS.
How does the power consumption of SI8635BT-IS compare at different data rates and supply voltages?
At 100 Mbps and 5 V supply, SI8635BT-IS draws ≤17.8 mA total (VDD1 + VDD2). At 1 Mbps, it consumes ≤3.9 mA (VDD1) + ≤3.1 mA (VDD2). Current scales linearly with data rate and is 20–30% lower at 2.5 V operation - enabling energy-efficient designs in battery-powered isolated sensors using SI8635BT-IS.
Can SI8635BT-IS be used in automotive applications, and what qualifications does it hold?
Yes - SI8635BT-IS is qualified to AEC-Q100 Grade 1 (–40°C to +125°C) and built using automotive-specific manufacturing flows. It supports AIAG-compliant PPAP documentation and IMDS/CAMDS reporting, making SI8635BT-IS appropriate for on-board chargers, battery management systems, and traction inverters in hybrid and battery electric vehicles.
SI8635BT-IS 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:
- 3
- Inputs - Side 1/Side 2:
- 3/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 60kV/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
SI8635BT-IS FAQ
1.How can I place an order for SI8635BT-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8635BT-IS 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 SI8635BT-IS reliable?
The price and inventory of SI8635BT-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8635BT-IS is usually 5 days.
3.What payment methods are accepted for SI8635BT-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8635BT-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8635BT-IS?
SI8635BT-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8635BT-IS 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 SI8635BT-IS?
For technical support, including SI8635BT-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8635BT-IS requirements.
6.How does Aetrix verify that SI8635BT-IS is sourced from the original manufacturer or authorized distributors?
All SI8635BT-IS 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 SI8635BT-IS meets industry standards.
7.What is the process for return or replacement of SI8635BT-IS?
All SI8635BT-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI8635BT-IS, 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 SI8635BT-IS part is unused and in its original packaging.
Return procedure for SI8635BT-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8635BT-IS 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.
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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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