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Skyworks Solutions Inc. SI86SQ44BE-IS2
- Part No.:
- SI86SQ44BE-IS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SQ44BE-IS2.pdf
- Description:
- 6.0 KVRMS QSPI COMPATIBLE ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,129
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Product details
Overview
SI86SQ44BE-IS2 from Skyworks Solutions is a 5-channel reinforced digital isolator with quad-SPI (QSPI) direction control, designed for isolated high-speed bidirectional data buses in industrial and automotive systems. It supports up to 150 Mbps data rate, features 10 ns typical propagation delay, 6000 VRMS isolation rating, and operates across –40 to +125 °C with 2.25–5.5 V dual-supply flexibility. It enables isolated QSPI memory interfaces in battery management and motor control.
For engineers reviewing the SI86SQ44BE-IS2 datasheet, SI86SQ44BE-IS2 pinout, SI86SQ44BE-IS2 application, or SI86SQ44BE-IS2 equivalent, key selection criteria include its configurable channel direction (DIR/ISO_DIR), dual-side enable (EN_A/EN_B), fail-safe output mode, and compliance with IEC 60747-17 and UL 1577 for reinforced insulation in safety-critical designs.
Technical Context
The SI86SQ44BE-IS2 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and providing immunity to magnetic fields and EMI. Its architecture integrates four bidirectional channels and one dedicated forward-direction DIR_IN/ISO_DIR pair, enabling half-duplex QSPI bus isolation without external logic.
It supports independent undervoltage lockout (UVLO) and reset per side (VDD1/VDD2), with 100 kΩ weak pulldown on unpowered I/Os and configurable fail-safe output state (high/low). Sleep mode is not implemented in this variant-only EN_A/EN_B tristate control is active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-throughput QSPI flash access without timing bottlenecks |
| Propagation delay | 10 ns typical - enables tight timing margins in real-time control loops |
| Isolation rating | 6000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 |
| Supply voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| CMTI | 100 kV/µs minimum - ensures robust operation in noisy motor drive and inverter environments |
| Fail-safe mode | Selectable default output (high/low) during power loss - prevents undefined states in safety-critical peripherals |
Pinout & Package
SI86SQ44BE-IS2 is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced isolation. Pin 1 is marked with a dot; pin count and layout conform to JEDEC MS-013AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Side A / Side B supply | Independent 2.25–5.5 V power domains; require local 0.1 µF + 10 µF bypassing |
| GND1, GND2 | Side A / Side B ground | Galvanically separated reference planes; must not be shorted externally |
| A1–A4, B1–B4 | Bidirectional I/O channels | Four isolated signal paths; direction controlled globally by DIR pin |
| DIR | Direction control input | High = A→B flow; low = B→A flow; sets all four bidirectional channels simultaneously |
| ISO_DIR | Isolated direction status output | Provides isolated copy of DIR state on Side B for synchronized peripheral control |
| EN_A, EN_B | Side A / Side B output enable | Active-high; drives corresponding side's outputs to high-impedance when low |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates startup initialization and provides superior CMTI vs. optocouplers or capacitive isolators |
| Configurable QSPI direction control | Single DIR pin manages bidirectional data flow across four channels, reducing PCB routing complexity |
| Reinforced safety certification | UL 1577 (6000 VRMS), VDE 60747-17, CSA 62368-1/60601-1 - enables system-level safety compliance |
| Dual-supply UVLO and reset | Independent monitoring per side ensures deterministic behavior during asymmetric power sequencing |
| Schmitt-trigger + CMOS inputs | High noise immunity with 0.15×VDD hysteresis; compatible with slow-edge or noisy microcontroller GPIOs |
| Fail-safe output option | Factory-configured default high or low output during VDD loss - prevents latch-up or undefined logic states |
Applications
| Battery Management System (BMS) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Isolating QSPI interface between MCU and isolated high-voltage battery pack monitor ICs. IC Role / Device Role / Timing Role: Bidirectional QSPI data isolator with direction control for command/response traffic over shared bus lines. Use Value: Enables safe, high-speed configuration and telemetry readout from cell monitors while maintaining 6000 VRMS reinforced insulation. |
Use Scenario: Isolating field-side digital I/O expansion backplane using QSPI daisy-chain topology. IC Role / Device Role / Timing Role: Direction-controlled isolator for half-duplex QSPI clock and data lines between controller and remote I/O slaves. Use Value: Reduces component count vs. discrete isolators; maintains 150 Mbps throughput across 4-bit data lanes with single DIR coordination. |
| Onboard Charger (OBC) Controller | Traction Inverter Gate Driver Interface |
|
Use Scenario: Isolating firmware update and calibration data path between main MCU and isolated OBC power stage controller. IC Role / Device Role / Timing Role: Configurable-direction isolator supporting both host-initiated writes and device-initiated status reads over same bus. Use Value: Eliminates need for separate TX/RX isolators; DIR pin synchronizes with OBC operating mode (charge/discharge) for optimal signal routing. |
Use Scenario: Isolating feedback and control signals between DSP and gate driver ICs in multi-level inverter stages. IC Role / Device Role / Timing Role: High-CMTI isolator for bidirectional status/control exchange (e.g., fault reporting, dead-time adjustment). Use Value: 100 kV/µs CMTI and 10 ns propagation delay ensure timing integrity in fast-switching SiC/GaN inverter control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3481BRWZ | 4-channel, fixed-direction (2 forward + 2 reverse); no DIR pin; 25 Mbps max data rate | Lacks QSPI direction control; suitable only for unidirectional or pre-wired bidirectional links | Choose when lower speed and simpler control suffice; not drop-in due to pinout and functional mismatch |
| ISO6741FDWR | 4-channel, reinforced isolation (5000 VRMS); no direction control; 50 Mbps max data rate | Requires external logic for bidirectional bus control; lower CMTI (85 kV/µs) | Consider for cost-sensitive industrial I/O where QSPI speed and direction agility are not required |
Compared with ADUM3481BRWZ and ISO6741FDWR, SI86SQ44BE-IS2 uniquely delivers integrated QSPI direction control at 150 Mbps with 6000 VRMS reinforced isolation-enabling single-chip bidirectional memory bus isolation where timing, safety, and routing efficiency are critical.
Availability
SI86SQ44BE-IS2 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, onboard chargers, and industrial PLC I/O modules requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for SI86SQ44BE-IS2 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 Si86Sxx family-including SI86SQ44BE-IS2-is engineered for reinforced isolation in safety-critical automotive and industrial systems, with emphasis on high-speed data integrity, electromagnetic robustness, and regulatory compliance.
FAQ
What is the isolation rating and safety certification status of SI86SQ44BE-IS2?
SI86SQ44BE-IS2 is rated for 6000 VRMS isolation per UL 1577 for 1 minute and carries reinforced insulation certification per IEC 60747-17, VDE 62368-1, and CSA 60601-1. These approvals are documented in Skyworks' official safety reports and apply directly to the SI86SQ44BE-IS2 ordering part number in WB SOIC-16 packaging.
How does the DIR and ISO_DIR functionality work in SI86SQ44BE-IS2?
In SI86SQ44BE-IS2, the DIR pin (pin 7) sets global signal direction: high configures A→B flow, low configures B→A flow. ISO_DIR (pin 9) replicates that state on Side B, allowing synchronized peripheral control. Both pins operate at CMOS levels and require no external pull resistors beyond recommended 10 kΩ pull-ups for EN_A/EN_B.
Does SI86SQ44BE-IS2 support sleep mode or low-power standby?
No-SI86SQ44BE-IS2 does not implement sleep mode (SMb). It supports only tristate output control via EN_A and EN_B pins. Sleep mode is available only in SM-series variants (e.g., Si86SM42); SI86SQ44BE-IS2 is optimized for QSPI direction control and high-speed operation, not ultra-low quiescent current.
What are the supply voltage and bypass capacitor requirements for SI86SQ44BE-IS2?
SI86SQ44BE-IS2 requires 2.25–5.5 V on both VDD1 and VDD2, with independent 0.1 µF ceramic + 10 µF bulk capacitors placed adjacent to each VDD/GND pair. This dual-bypass network suppresses high-frequency switching noise and ensures stable operation at 150 Mbps data rates.
Can SI86SQ44BE-IS2 be used in AEC-Q100 automotive applications?
Yes-SI86SQ44BE-IS2 is AEC-Q100 qualified Grade 1 (–40 to +125 °C) and manufactured using automotive-specific process flows. It supports PPAP documentation, IMDS/CAMDS compliance, and is approved for use in onboard chargers, battery management systems, and traction inverters per automotive OEM requirements.
SI86SQ44BE-IS2 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:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 6000Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 14ns, 14ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86SQ44BE-IS2 FAQ
1.How can I place an order for SI86SQ44BE-IS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SQ44BE-IS2 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 SI86SQ44BE-IS2 reliable?
The price and inventory of SI86SQ44BE-IS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SQ44BE-IS2 is usually 5 days.
3.What payment methods are accepted for SI86SQ44BE-IS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SQ44BE-IS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SQ44BE-IS2?
SI86SQ44BE-IS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SQ44BE-IS2 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 SI86SQ44BE-IS2?
For technical support, including SI86SQ44BE-IS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SQ44BE-IS2 requirements.
6.How does Aetrix verify that SI86SQ44BE-IS2 is sourced from the original manufacturer or authorized distributors?
All SI86SQ44BE-IS2 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 SI86SQ44BE-IS2 meets industry standards.
7.What is the process for return or replacement of SI86SQ44BE-IS2?
All SI86SQ44BE-IS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SQ44BE-IS2, 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 SI86SQ44BE-IS2 part is unused and in its original packaging.
Return procedure for SI86SQ44BE-IS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SQ44BE-IS2 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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