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Skyworks Solutions Inc. SI8651ED-B-ISR
- Part No.:
- SI8651ED-B-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8651ED-B-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
SI8651ED-B-ISR from Skyworks is a five-channel, ultra-low-power digital isolator with 4 input channels on VDD1 side and 1 output channel on VDD2 side, rated for 5 kVRMS reinforced insulation in wide-body SOIC-16 package. It supports DC–150 Mbps data rates, achieves <10 ns propagation delay, and features selectable high-default fail-safe mode, Schmitt-trigger inputs, and tri-state outputs via EN control - deployed in isolated motor control feedback loops and battery management system signal interfaces.
For engineers reviewing the SI8651ED-B-ISR datasheet, SI8651ED-B-ISR pinout, SI8651ED-B-ISR application, or SI8651ED-B-ISR equivalent, this page delivers verified specifications including 5 kVRMS isolation rating, 4:1 channel asymmetry, 2.5–5.5 V dual-supply operation, –40 to +125 °C automotive-grade temperature range, and precise timing parameters critical for real-time control and safety-critical isolation.
Technical Context
The SI8651ED-B-ISR implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its architecture separates input (Side A) and output (Side B) domains with independent undervoltage lockout (UVLO) monitors on both VDD1 and VDD2 supplies.
It provides asymmetric channel configuration (4 inputs on VDD1, 1 output on VDD2), with dedicated enable inputs (EN1 on Side A, EN2 on Side B) supporting independent tri-state control of A5 and B1–B4 outputs. Fail-safe default-high behavior is factory-set per ordering code and maintained during VDD1 loss while VDD2 remains powered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation - enables use in high-voltage industrial inverters and EV traction systems meeting IEC 60601-1 and IEC 62368-1. |
| Max Data Rate | 150 Mbps - supports high-speed serial communication in isolated ADC/DAC interfaces and real-time motor encoder links. |
| Propagation Delay | 5–13 ns (typ. 8 ns) - ensures sub-10 ns timing fidelity for closed-loop control in servo drives and power supply feedback paths. |
| Supply Voltage Range | 2.5–5.5 V on both sides - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Channel Configuration | 4-input / 1-output (VDD1/VDD2 sides) - optimized for unidirectional sensor-to-controller isolation with local output enable control. |
| Fail-Safe Default | High - guarantees known logic state at B1–B4 outputs during VDD1 brownout, critical for safe shutdown sequencing in BMS. |
| CMTI | ≥50 kV/µs - maintains signal integrity in noisy high-dv/dt environments like IGBT gate drivers and inverter switching nodes. |
Pinout & Package
SI8651ED-B-ISR is housed in a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16), providing 8.3 mm creepage and clearance for 5 kVRMS reinforced insulation compliance per VDE 0884-10 and UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies 2.5–5.5 V to input-side logic and RF transmitter; independent UVLO monitoring prevents metastability during brownout. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8.3 mm to maintain reinforced insulation barrier. |
| A1–A4 | Digital input channels (Side A) | Accept 2.0–5.5 V logic signals with Schmitt-trigger thresholds (VT+ = 1.67 V typ., VT– = 1.23 V typ.) for >1.2 V noise margin. |
| EN1 | Enable input for A5 output | Tri-states A5 when low; internally pulled up to VDD1 (2 µA), allowing floating connection if unused in low-noise layouts. |
| VDD2 | Output-side power supply | Supplies 2.5–5.5 V to output-side receiver and driver; enables fail-safe high output during VDD1 loss. |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1; defines safety barrier between primary and secondary circuits. |
| B1–B4 | Digital output channels (Side B) | Deliver 50 Ω nominal output impedance (±40%) with VOH ≥ VDD2–0.4 V and VOL ≤ 0.4 V @ 4 mA - suitable for 50 Ω PCB trace termination. |
| EN2 | Enable input for B1–B4 outputs | Tri-states B1–B4 when low; internal 2 µA pull-up allows NC or external logic control; essential for synchronized output gating in multi-isolator systems. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift; enables stable 60-year lifetime at rated working voltage with no start-up delay. |
| Selectable fail-safe mode | Factory-configured high-default output ensures predictable B1–B4 state during VDD1 failure - critical for functional safety in ISO 26262 ASIL-B systems. |
| Ultra-low power at 100 Mbps | 8.0 mA (VDD1) + 18.4 mA (VDD2) typ. at 5 V - reduces thermal load in dense BMS modules and enables smaller heatsinks. |
| High CMTI immunity | 50 kV/µs minimum common-mode transient immunity - suppresses false triggering in 1000 V/µs inverter switching environments. |
| Wide temperature range | –40 to +125 °C operation - qualified per AEC-Q100 Grade 1, enabling deployment in under-hood automotive and industrial ambient conditions. |
Applications
| Motor Control Feedback Isolation | Isolated Battery Management Interface |
|---|---|
|
Use Scenario: Isolating encoder quadrature signals and current-sense amplifier outputs from MCU in servo drives and industrial inverters. IC Role / Device Role / Timing Role: SI8651ED-B-ISR transmits four high-speed position/phase signals (A1–A4) across isolation barrier to MCU, while B1–B4 drive fault-clear or enable lines with fail-safe high default. Use Value: Sub-10 ns propagation delay preserves encoder timing accuracy; 5 kVRMS rating meets IEC 61800-5-1 reinforced insulation requirements for 690 V AC drives. |
Use Scenario: Isolating cell voltage monitoring IC outputs and MCU command signals in high-voltage EV battery packs (up to 1000 V). IC Role / Device Role / Timing Role: SI8651ED-B-ISR carries four analog monitor status bits (A1–A4) to MCU side and returns one isolated enable signal (B1) to protect against controller faults. Use Value: 50 kV/µs CMTI prevents misreads during pack switching transients; AEC-Q100 qualification ensures reliability over 15-year vehicle lifecycle. |
| Isolated Switch-Mode Power Supply Control | Traction Inverter Gate Driver Interface |
|
Use Scenario: Isolating PWM signals from primary-side controller to secondary-side synchronous rectifier FETs in LLC resonant converters. IC Role / Device Role / Timing Role: SI8651ED-B-ISR routes four timing-critical gate control signals (A1–A4) across isolation barrier, with EN2 enabling simultaneous disable during overcurrent events. Use Value: 150 Mbps capability supports >1 MHz switching frequencies; 2.5 V operation allows direct interface with low-voltage controllers to reduce system power. |
Use Scenario: Isolating MCU PWM outputs and fault feedback signals between control board and high-power IGBT/SiC gate driver stages in EV traction inverters. IC Role / Device Role / Timing Role: SI8651ED-B-ISR transmits four phase-control signals (A1–A4) to gate drivers and returns one isolated desaturation fault flag (B1) to MCU with guaranteed high-default state. Use Value: Reinforced 5 kVRMS isolation withstands 1200 V DC bus transients; –40 to +125 °C rating supports operation near power modules without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141E0BRZ | 4-channel, 150 Mbps, 3.75 kVRMS, SOIC-16 narrow body; no fail-safe default option; higher 100 Mbps supply current (12.5 mA/VDD). | Limited to 3.75 kVRMS systems; lacks configurable fail-safe output - requires external pull-ups for safe state assurance. | Choose ADUM141E0BRZ only when 3.75 kVRMS suffices and external biasing is acceptable for safety-critical outputs. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5 kVRMS, SOIC-16 wide body; fails low by default; lower data rate limits use in >50 Mbps encoder links. | Not suitable for 100+ Mbps motor control or BMS telemetry; fail-low behavior conflicts with SI8651ED-B-ISR's high-default safety logic. | Prefer ISO6741FDWR only in cost-sensitive, lower-speed industrial PLC I/O where fail-low aligns with system architecture. |
Compared with ADUM141E0BRZ and ISO6741FDWR, SI8651ED-B-ISR uniquely combines 5 kVRMS reinforced insulation, factory-set high-fail-safe output, and full 150 Mbps capability in a single 4:1 asymmetric channel device - eliminating external components and layout compromises required by alternatives.
Availability
SI8651ED-B-ISR is available at Aetrix Electronics and suitable for industrial automation systems, battery management systems, and traction inverter designs requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for SI8651ED-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 for automotive, industrial, and communications markets.
The Si865x family was designed specifically for high-reliability, high-speed digital isolation in safety-critical systems - delivering RF-based performance, AEC-Q100 qualification, and reinforced insulation certification without optical limitations.
FAQ
What is the isolation rating and safety certification of SI8651ED-B-ISR?
SI8651ED-B-ISR is rated for 5 kVRMS reinforced isolation and certified to UL 1577, VDE 0884-10, CSA 5A, and CQC GB4943.1 standards. It meets IEC 60950-1, IEC 62368-1, and IEC 60601-1 requirements for reinforced insulation, enabling use in medical and industrial equipment with up to 1000 V working voltage.
Does SI8651ED-B-ISR require startup initialization or configuration?
No, SI8651ED-B-ISR requires no startup initialization or configuration. Its RF-based isolation architecture begins transmitting valid data within 40 µs of power application (tSU), with outputs following input states after UVLO release - simplifying firmware design and eliminating boot-time uncertainty in safety-critical systems.
How does the fail-safe default-high mode function in SI8651ED-B-ISR?
In SI8651ED-B-ISR, the fail-safe mode is factory-set to default-high: when VDD1 is unpowered but VDD2 remains active, B1–B4 outputs remain logic high. This behavior is hard-coded per ordering code "ED" and does not require external components - ensuring predictable safe state during input-side power loss in BMS and motor control applications.
What are the supply current requirements of SI8651ED-B-ISR at 100 Mbps?
At 100 Mbps with 5 V supplies, SI8651ED-B-ISR draws 8.0 mA (VDD1) and 18.4 mA (VDD2) typical, totaling 26.4 mA. At 3.3 V, it draws 6.6 mA (VDD1) and 13.2 mA (VDD2) typical. These values include all five channels operating simultaneously with 15 pF load per output.
Can SI8651ED-B-ISR operate with mismatched supply voltages on VDD1 and VDD2?
Yes, SI8651ED-B-ISR supports independent 2.5–5.5 V operation on VDD1 and VDD2. For example, VDD1 may be 3.3 V (for MCU interface) while VDD2 is 5 V (for actuator driver interface), with full timing and isolation specifications maintained - enabling flexible level-shifting without external translators.
SI8651ED-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:
- 4/1
- 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
SI8651ED-B-ISR FAQ
1.How can I place an order for SI8651ED-B-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8651ED-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 SI8651ED-B-ISR reliable?
The price and inventory of SI8651ED-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 SI8651ED-B-ISR is usually 5 days.
3.What payment methods are accepted for SI8651ED-B-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8651ED-B-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8651ED-B-ISR?
SI8651ED-B-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8651ED-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 SI8651ED-B-ISR?
For technical support, including SI8651ED-B-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8651ED-B-ISR requirements.
6.How does Aetrix verify that SI8651ED-B-ISR is sourced from the original manufacturer or authorized distributors?
All SI8651ED-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 SI8651ED-B-ISR meets industry standards.
7.What is the process for return or replacement of SI8651ED-B-ISR?
All SI8651ED-B-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8651ED-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 SI8651ED-B-ISR part is unused and in its original packaging.
Return procedure for SI8651ED-B-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8651ED-B-ISR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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