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Skyworks Solutions Inc. SI8651EB-AUR
- Part No.:
- SI8651EB-AUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8651EB-AUR.pdf
- Description:
- AUTOMOTIVE 2.5 KV 4 FORWARD & 1
- Quantity:
- Payment:
- Shipping:
Inventory:2,432
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Product details
Overview
SI8651EB-AUR from Skyworks is a five-channel digital isolator with 4 input channels on VDD1 side and 1 output channel on VDD2 side, supporting up to 150 Mbps data rate, <10 ns propagation delay, and 5 kVRMS reinforced isolation in a wide-body SOIC-16 package. It features Schmitt-trigger inputs, tri-state outputs with independent enable control (EN1/EN2), and selectable high-default fail-safe mode - used in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8651EB-AUR datasheet, SI8651EB-AUR pinout, SI8651EB-AUR application, or SI8651EB-AUR equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, exact fail-safe behavior (default-high), and real-world isolation performance metrics including CMTI ≥50 kV/µs and channel-to-channel skew ≤2.5 ns.
Technical Context
The SI8651EB-AUR implements RF-based on-off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. Its dual-supply architecture (VDD1/VDD2) supports asymmetric voltage operation (2.5–5.5 V each) and independent undervoltage lockout per side.
It integrates two dedicated enable inputs (EN1 on VDD1 side for A5; EN2 on VDD2 side for B1–B4), allowing selective channel tri-stating. The default-high fail-safe mode ensures logic-high outputs during VDD1 loss while VDD2 remains powered - critical for safe shutdown sequencing in traction inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels / Direction | 5-channel: 4 unidirectional inputs (A1–A4), 1 unidirectional output (A5) on VDD1 side; 4 outputs (B1–B4) on VDD2 side - enables asymmetric signal routing across isolation barrier. |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like isolated SPI clock lines and real-time PWM feedback in motor drives. |
| Propagation Delay | 5–13 ns (typ. 8 ns) - ensures sub-10 ns timing alignment for closed-loop control loops requiring tight phase margin. |
| Isolation Rating | 5 kVRMS reinforced insulation (UL, VDE, CQC certified) - meets IEC 62368-1 and IEC 60601-1 requirements for medical and industrial safety-critical systems. |
| Supply Voltage Range | 2.5–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| CMTI | ≥50 kV/µs - prevents false triggering in high-dV/dt environments such as SiC/GaN inverter switching nodes. |
| AEC-Q100 Grade | Qualified to Grade 0 (–40°C to +125°C ambient) - validated for under-hood automotive applications including on-board chargers and battery management systems. |
Pinout & Package
SI8651EB-AUR is housed in a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16) with 8.3 mm creepage/clearance, supporting reinforced 5 kVRMS isolation. Pin assignments are validated per Skyworks datasheet Rev. 206455A, Section 5.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to A-side logic and input buffers; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 | Input-side ground reference | Return path for VDD1; requires separate PCB plane from GND2 to maintain isolation integrity. |
| A1–A4 | Input signals (VDD1 side) | Four digital inputs with Schmitt-trigger thresholds (VT+ = 1.67 V typ., VT– = 1.23 V typ.) for noise immunity. |
| A5 | Output signal (VDD1 side) | Single output driven from VDD2 side; controlled by EN1 - used for reverse-direction status or fault signaling. |
| EN1 | Enable for A5 output | Active-high enable on VDD1 side; when low, A5 enters high-impedance state - enables bidirectional handshake protocols. |
| VDD2 | Output-side power supply | Supplies power to B-side logic and output drivers; independent of VDD1 for galvanic separation. |
| GND2 | Output-side ground reference | Return path for VDD2; physically isolated from GND1; defines secondary-side reference plane. |
| B1–B4 | Output signals (VDD2 side) | Four CMOS outputs with 50 Ω nominal impedance; VOH ≥ VDD2 – 0.4 V, VOL ≤ 0.4 V at 4 mA load. |
| EN2 | Enable for B1–B4 outputs | Active-high enable on VDD2 side; when low, all four B outputs enter high-impedance state - supports dynamic channel gating. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe default-high output | Guarantees logic-high B1–B4 outputs during VDD1 loss while VDD2 is active - prevents unintended gate turn-on in IGBT/SiC driver stages. |
| Tri-state enable control | Dual independent enables (EN1 for A5, EN2 for B1–B4) allow precise channel-level output disabling without affecting other channels. |
| Ultra-low power at 100 Mbps | Typ. 8.0 mA per side at 100 Mbps (5 V), enabling thermally constrained designs in compact BMS modules. |
| Sub-10 ns channel skew | Channel-to-channel skew ≤2.5 ns ensures synchronized sampling of multi-phase current/voltage feedback in motor control. |
| Automotive-grade process flow | Manufactured using full AEC-Q100-compliant automotive flows with AIAG PPAP documentation and IMDS/CAMDS compliance. |
Applications
| Motor Control Gate Driver Interface | Isolated Battery Management System (BMS) |
|---|---|
|
Use Scenario: Transmitting PWM signals and fault feedback between MCU and high-voltage IGBT/SiC gate drivers in EV traction inverters. IC Role / Device Role / Timing Role: Isolates control signals across 800 V DC bus; provides <10 ns propagation delay and ≤2.5 ns channel skew for precise dead-time control. Use Value: Enables safe, high-efficiency switching with reinforced 5 kVRMS isolation and CMTI ≥50 kV/µs to withstand fast SiC dV/dt transients. |
Use Scenario: Communicating cell voltage and temperature measurements from high-side monitoring ICs to low-side MCU in modular EV battery packs. IC Role / Device Role / Timing Role: Transfers isolated digital data (e.g., SPI, UART) across 400–900 V potential difference with fail-safe default-high outputs. Use Value: Prevents erroneous discharge commands during primary-side power loss; AEC-Q100 Grade 0 ensures reliability at 125 °C ambient. |
| Industrial PLC Digital I/O Module | Medical Isolated ADC Interface |
|
Use Scenario: Providing isolated digital input/output channels for 24 V sensor and actuator interfacing in factory automation controllers. IC Role / Device Role / Timing Role: Replaces optocouplers with 150 Mbps capability and 60-year lifetime; supports hot-swap and diagnostics via EN-controlled tri-state. Use Value: Reduces BOM count and board space vs. discrete opto + buffer solutions; 2.5–5.5 V supply range simplifies power design. |
Use Scenario: Isolating serial interface between isolated precision ADC (e.g., ADS131M04) and host processor in patient-connected diagnostic equipment. IC Role / Device Role / Timing Role: Provides reinforced 5 kVRMS isolation per IEC 60601-1; Schmitt-trigger inputs reject EMI in noisy clinical environments. Use Value: Meets creepage/clearance requirements without external components; RoHS-compliant wide-body SOIC avoids lead-free solder joint reliability issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8651BB-AUR | Same 4:1 channel configuration and WB SOIC-16 package, but default-low fail-safe mode instead of default-high. | Suitable where safe-off state requires logic-low outputs during input-side power loss (e.g., certain solenoid control). | Select SI8651BB-AUR only if system logic demands default-low behavior; otherwise SI8651EB-AUR maintains consistent high-state safety posture. |
| ADUM141E0BRIZ | 4-channel, default-high isolator in SOIC-16 narrow body; lower isolation rating (3.75 kVRMS), no AEC-Q100 qualification. | Limited to industrial-grade applications below 125 °C ambient; insufficient for automotive traction systems. | Use ADUM141E0BRIZ only for cost-sensitive non-automotive designs where 3.75 kVRMS and commercial temp range suffice. |
Compared with SI8651BB-AUR, SI8651EB-AUR provides identical timing and power specs but guarantees fail-safe high outputs - critical for preventing unintended activation in safety-critical power stages. Versus ADUM141E0BRIZ, it adds AEC-Q100 Grade 0, 5 kVRMS reinforced isolation, and wider temperature support for automotive deployment.
Availability
SI8651EB-AUR is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and isolated PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI8651EB-AUR 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 automotive and industrial systems demanding ultra-low-power, high-speed, and safety-certified galvanic isolation - with SI8651EB-AUR optimized for asymmetric 4-input/1-output signal routing in BMS and motor control.
FAQ
What is the fail-safe behavior of SI8651EB-AUR during VDD1 power loss?
The SI8651EB-AUR is configured with default-high fail-safe mode: when VDD1 is unpowered but VDD2 remains active, outputs B1–B4 drive logic-high. This prevents unintended deactivation of downstream drivers in safety-critical systems. The SI8651EB-AUR datasheet confirms this behavior in Table 3.1 and Ordering Guide entry Si8651EB-AU.
Does SI8651EB-AUR support independent enable control for all channels?
Yes - SI8651EB-AUR provides two dedicated enable inputs: EN1 controls output A5 on the VDD1 side, and EN2 controls outputs B1–B4 on the VDD2 side. Each enable operates independently, allowing selective tri-stating without affecting other channels. This functionality is documented in Table 3.2 of the SI8651EB-AUR datasheet.
What isolation certifications does SI8651EB-AUR hold?
SI8651EB-AUR is certified to UL 1577 (5000 VRMS for 1 minute), CSA Component Acceptance Notice 5A, VDE 0884-10, IEC 60950-1/62368-1/60601-1 (reinforced), and CQC GB4943.1. These approvals validate its use in medical, industrial, and automotive end-equipment requiring reinforced insulation.
Can SI8651EB-AUR operate with different supply voltages on each side?
Yes - SI8651EB-AUR supports independent 2.5–5.5 V supplies on VDD1 and VDD2. This allows interfacing a 3.3 V MCU on one side with a 5 V analog circuit on the other, without external level shifters. Electrical Characteristics tables in the SI8651EB-AUR datasheet specify performance across both 3.3 V and 5 V operating points.
Is SI8651EB-AUR pin-compatible with other Si865x variants in SOIC-16 packages?
SI8651EB-AUR uses the same WB SOIC-16 footprint and pinout as all Si865x devices in wide-body packages (e.g., Si8651ED-AUR, Si8652ED-AUR). However, channel direction (input/output assignment) and enable mapping differ across variants - always verify pin function against the specific SI8651EB-AUR datasheet before layout reuse.
SI8651EB-AUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm 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:
- 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-QSOP
SI8651EB-AUR FAQ
1.How can I place an order for SI8651EB-AUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8651EB-AUR 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 SI8651EB-AUR reliable?
The price and inventory of SI8651EB-AUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8651EB-AUR is usually 5 days.
3.What payment methods are accepted for SI8651EB-AUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8651EB-AUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8651EB-AUR?
SI8651EB-AUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8651EB-AUR 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 SI8651EB-AUR?
For technical support, including SI8651EB-AUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8651EB-AUR requirements.
6.How does Aetrix verify that SI8651EB-AUR is sourced from the original manufacturer or authorized distributors?
All SI8651EB-AUR 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 SI8651EB-AUR meets industry standards.
7.What is the process for return or replacement of SI8651EB-AUR?
All SI8651EB-AUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8651EB-AUR, 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 SI8651EB-AUR part is unused and in its original packaging.
Return procedure for SI8651EB-AUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8651EB-AUR 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
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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