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Skyworks Solutions Inc. SI8655BD-B-ISR
- Part No.:
- SI8655BD-B-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8655BD-B-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,057
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Product details
Overview
SI8655BD-B-ISR from Skyworks is a five-channel, unidirectional digital isolator with 5 kVRMS reinforced isolation rating, 150 Mbps data rate, and <10 ns propagation delay. It features Schmitt-trigger inputs, tri-state outputs with enable control, fail-safe low-default output mode, and operates across –40°C to +125°C for industrial and automotive isolated communication interfaces.
For engineers reviewing the SI8655BD-B-ISR datasheet, SI8655BD-B-ISR pinout, SI8655BD-B-ISR application, or SI8655BD-B-ISR equivalent, this page delivers verified electrical specs, package mapping, functional role in isolated power/communication systems, and validated alternative options for high-reliability design-in.
Technical Context
The SI8655BD-B-ISR implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating startup initialization and enabling robust noise immunity. All five channels are input-side (VDD1) to output-side (VDD2) unidirectional, with no input channels on VDD2 side.
It supports dual independent supply domains (2.5–5.5 V each), includes undervoltage lockout (UVLO) per side, and uses internal 2 µA pull-ups on enable pins. The fail-safe default-low output state is fixed by ordering code and remains active during VDD1 loss while VDD2 is powered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional, all from VDD1 to VDD2 side |
| Max Data Rate | 150 Mbps - supports high-speed serial links (e.g., SPI, RS-485 isolated PHY) |
| Propagation Delay | 5–13 ns - enables tight timing budgets in real-time control loops |
| Isolation Rating | 5 kVRMS reinforced - certified to UL, VDE, CSA, CQC for safety-critical systems |
| Supply Voltage Range | 2.5–5.5 V per side - interoperable with 3.3 V and 5 V logic domains |
| Fail-Safe Output | Default Low - ensures safe deactivation of downstream drivers during input-side power loss |
| CMTI | ≥35 kV/µs - maintains signal integrity in high-noise motor drive or inverter environments |
Pinout & Package
SI8655BD-B-ISR is housed in a RoHS-compliant wide-body SOIC-16 package (7.5 mm creepage/clearance), supporting reinforced insulation up to 5 kVRMS. Pin assignments are validated per Skyworks' Si8655 Pin Descriptions (Section 5.2, DS 206455A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and RF transmitter circuitry; UVLO threshold 1.88–2.375 V |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier |
| IN1–IN5 | Digital input signals (VDD1 domain) | Schmitt-trigger inputs with 0.44 V hysteresis; VIH ≥2.0 V, VIL ≤0.8 V |
| VDD2 | Output-side power supply | Supplies RF receiver and output drivers; independent of VDD1 |
| GND2 | Output-side ground reference | Isolated return for VDD2; defines secondary-side logic reference |
| OUT1–OUT5 | Isolated digital outputs (VDD2 domain) | Tri-state capable; VOH ≥VDD2–0.4 V, VOL ≤0.4 V at 4 mA sink |
| EN | Output-enable control (VDD2 domain) | Active-high; drives outputs to high-impedance when low; internally pulled up (2 µA) |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; enables immediate operation after power-up |
| 5 kVRMS reinforced insulation | Meets IEC 62368-1, IEC 60601-1, and VDE 0884-10 for medical and industrial safety compliance |
| Ultra-low power at 100 Mbps | 5.7 mA (VDD1) + 28.7 mA (VDD2) typical @5 V - reduces thermal load in dense PCB layouts |
| Channel-to-channel skew | ≤2.5 ns - preserves timing alignment across multi-bit parallel interfaces (e.g., isolated ADC data bus) |
| Transient immunity | ≥35 kV/µs common-mode - sustains operation during fast-switching events in motor drives and inverters |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
Use Scenario: Gate driver interface in 3-phase inverter stacks for HVAC and industrial pumps. IC Role / Device Role / Timing Role: Isolates PWM signals from MCU to high-side gate drivers while maintaining <13 ns propagation delay for precise dead-time control. Use Value: Prevents shoot-through faults via deterministic timing and 5 kVRMS barrier withstand during 600 V DC bus transients. | Use Scenario: Secondary-side voltage/current sensing feedback loop in isolated DC-DC converters. IC Role / Device Role / Timing Role: Transmits analog-to-digital converter (ADC) output bits across isolation barrier with ≤2.5 ns channel skew. Use Value: Enables accurate closed-loop regulation without timing-induced error accumulation in 1 MHz+ switching supplies. |
| Medical Imaging Power Systems | Battery Management System (BMS) Isolation |
Use Scenario: Signal isolation between patient-connected front-end and main system controller in MRI/X-ray power modules. IC Role / Device Role / Timing Role: Provides reinforced 5 kVRMS isolation for digital control lines per IEC 60601-1 Clause 8.8.3. Use Value: Eliminates need for external optocouplers or discrete capacitors, reducing BOM count and improving long-term reliability. | Use Scenario: Cell voltage monitoring data transmission from isolated slave boards to master controller in EV battery packs. IC Role / Device Role / Timing Role: Five-channel isolator carries 5-cell ADC readings simultaneously with fail-safe low default during cell-supply brownout. Use Value: Ensures safe shutdown signaling to main controller if any cell-side supply fails, meeting ASIL-B functional safety intent. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D1BRIZ | 4-channel, 150 Mbps, 3.75 kVRMS, SOIC-16 narrow body | Lacks fifth channel; lower isolation rating limits use in reinforced insulation systems | Select when only four signals require isolation and 3.75 kVRMS suffices for end-equipment certification |
| ISO6751QDWR | 5-channel, 50 Mbps, 5 kVRMS, SOIC-16 wide body, automotive AEC-Q100 Grade 1 | Lower data rate; higher quiescent current (1.8 mA/channel @1 Mbps vs. 1.6 mA for SI8655BD-B-ISR) | Prefer for cost-sensitive automotive BMS where 50 Mbps bandwidth is sufficient and AEC-Q100 Grade 1 is mandated |
Compared with ADUM141D1BRIZ and ISO6751QDWR, SI8655BD-B-ISR uniquely combines five-channel capacity, 150 Mbps speed, and 5 kVRMS reinforced isolation in a single wide-body SOIC-16 - enabling fewer components in high-bandwidth, safety-critical industrial and medical designs.
Availability
SI8655BD-B-ISR is available at Aetrix Electronics and suitable for industrial motor control, isolated power supply feedback, medical imaging power systems, and battery management systems requiring stable component supply and long-term lifecycle support.
Supply support for SI8655BD-B-ISR 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 for high-reliability, low-power digital isolation in harsh environments - targeting industrial automation, medical electronics, and electric vehicle subsystems demanding long-life, wide-temperature, and safety-certified performance.
FAQ
What is the isolation rating and safety certification status of the SI8655BD-B-ISR?
The SI8655BD-B-ISR provides 5 kVRMS reinforced isolation and is certified to UL 1577, CSA Component Acceptance Notice 5A, VDE 0884-10, IEC 62368-1, IEC 60601-1, and CQC GB4943.1 standards. These approvals validate its suitability for medical, industrial, and energy infrastructure applications requiring double or reinforced insulation barriers.
Does the SI8655BD-B-ISR require external startup initialization or configuration?
No, the SI8655BD-B-ISR requires no startup initialization or configuration. Its RF-based isolation architecture enables immediate operation upon power application. Outputs follow inputs within 40 µs after VDD1 and VDD2 rise above UVLO thresholds, with no firmware, clock, or handshake sequence needed.
What is the function of the EN pin on the SI8655BD-B-ISR, and how is it biased?
The EN pin on the SI8655BD-B-ISR is an active-high enable input located on the VDD2 side that places all five outputs (OUT1–OUT5) into high-impedance state when driven low. It is internally pulled up with a 2 µA current source, allowing direct connection to VDD2 or external logic without external resistors - simplifying layout in noise-sensitive environments.
How does the fail-safe default-low output behavior of the SI8655BD-B-ISR operate during power loss?
When VDD1 is unpowered but VDD2 remains active, the SI8655BD-B-ISR's fail-safe mode forces all outputs (OUT1–OUT5) to logic low - a behavior fixed by the "B" suffix in the part number. This ensures downstream circuits (e.g., gate drivers or safety relays) enter a known safe state without requiring external pull-downs or supervision circuitry.
What are the supply current requirements of the SI8655BD-B-ISR at 100 Mbps and 5 V operation?
At 100 Mbps and 5 V supply, the SI8655BD-B-ISR draws 5.7 mA typical from VDD1 and 28.7 mA typical from VDD2 (per datasheet Table 4.2). Total typical supply current is 34.4 mA, with worst-case values of 9.8 mA (VDD1) and 28.7 mA (VDD2) under full-load conditions.
SI8655BD-B-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 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:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8655BD-B-ISR FAQ
1.How can I place an order for SI8655BD-B-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8655BD-B-ISR 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 SI8655BD-B-ISR reliable?
The price and inventory of SI8655BD-B-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8655BD-B-ISR is usually 5 days.
3.What payment methods are accepted for SI8655BD-B-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8655BD-B-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8655BD-B-ISR?
SI8655BD-B-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8655BD-B-ISR 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 SI8655BD-B-ISR?
For technical support, including SI8655BD-B-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8655BD-B-ISR requirements.
6.How does Aetrix verify that SI8655BD-B-ISR is sourced from the original manufacturer or authorized distributors?
All SI8655BD-B-ISR 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 SI8655BD-B-ISR meets industry standards.
7.What is the process for return or replacement of SI8655BD-B-ISR?
All SI8655BD-B-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8655BD-B-ISR, 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 SI8655BD-B-ISR part is unused and in its original packaging.
Return procedure for SI8655BD-B-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8655BD-B-ISR Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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