My Inquiry
My Account
Skyworks Solutions Inc. SI86SQ44EE-AS2R
- Part No.:
- SI86SQ44EE-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI86SQ44EE-AS2R.pdf
- Description:
- 6.0 KVRMS QSPI COMPATIBLE ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI86SQ44EE-AS2R from Skyworks Solutions is a 5-channel, bidirectional digital isolator with QSPI bus support, featuring four reversible data channels and one dedicated direction-control channel (DIR/ISO_DIR), 150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS reinforced isolation rated per IEC 60747-17. It operates across 2.25–5.5 V supplies and supports industrial motor control and battery management systems.
For engineers reviewing the SI86SQ44EE-AS2R datasheet, SI86SQ44EE-AS2R pinout, SI86SQ44EE-AS2R application, or SI86SQ44EE-AS2R equivalent, key selection criteria include its configurable signal direction (A↔B), tristate enable control (EN_A/EN_B), fail-safe default output mode, and compatibility with quad-SPI memory interfaces requiring isolated half-duplex data transfer.
Technical Context
The SI86SQ44EE-AS2R implements RF-based on-off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs CMTI). Its DIR input sets unidirectional flow (A→B or B→A), while ISO_DIR provides an isolated copy of that state for synchronized side-B logic.
Each side features independent undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V) and reset thresholds (RSTB± ≈ 1.7 V), ensuring deterministic behavior during power sequencing. The device supports Schmitt-trigger CMOS inputs and tri-state outputs with 50 Ω nominal output impedance for controlled-impedance PCB routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed QSPI memory access without timing bottlenecks |
| Propagation delay | 10 ns typical - enables tight timing budgets in real-time motor control loops |
| Isolation rating | 6000 VRMS (1 min, UL 1577) - meets reinforced insulation requirements for 1000 VAC industrial systems |
| Supply voltage | 2.25–5.5 V - interoperable with 3.3 V and 5 V logic domains on both sides |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| CMTI | ≥100 kV/µs - prevents false triggering in high-di/dt environments like inverters and SMPS |
| Fail-safe mode | Selectable default-high or default-low output - ensures safe system state during power loss |
Pinout & Package
SI86SQ44EE-AS2R is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin assignments are validated per Figure 6 and Table 3 of Skyworks datasheet 206553B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, VDD2 | Side A / Side B supply | Independent 2.25–5.5 V rails enable level-shifting and dual-domain operation |
| GND1, GND2 | Side A / Side B ground | Galvanically separated grounds maintain isolation integrity and suppress ground-loop noise |
| A1–A4, B1–B4 | Reversible I/O channels | Four bidirectional data paths configured by DIR pin for QSPI DQ0–DQ3 isolation |
| DIR | Direction control input | Active-high signal selects A→B (high) or B→A (low) data flow; no internal pull-up/down |
| ISO_DIR | Isolated direction output | Provides synchronized, isolated copy of DIR state to Side B for coordinated peripheral logic |
| EN_A, EN_B | Side-A/B output enable | Active-high enables transmitter/receiver; low places outputs in high-impedance state |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates optical degradation and startup delays; achieves 0.3 ms full-power stabilization |
| Configurable bidirectional QSPI interface | Four isolated, direction-reversible channels + dedicated DIR/ISO_DIR support standard quad-SPI memory protocols |
| Independent UVLO and reset per side | Prevents metastability during asymmetric power-up; RSTB threshold (~1.7 V) ensures reliable configuration reload |
| Tri-state output control | EN_A/EN_B pins allow dynamic bus arbitration and power-gating of isolated I/O without external logic |
| Reinforced safety certification | UL 1577, VDE 60747-17, CSA 62368-1, and CQC GB4943.1 compliance verified for end-equipment certification |
Applications
| Industrial Motor Control | Battery Management Systems |
|---|---|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: SI86SQ44EE-AS2R provides bidirectional communication between MCU and isolated gate drivers while maintaining precise timing for PWM synchronization. Use Value: 10 ns propagation delay and 100 kV/µs CMTI prevent shoot-through faults during fast switching transitions. | Use Scenario: Isolating cell voltage monitoring and balancing commands between battery pack controller and slave monitors. IC Role / Device Role / Timing Role: SI86SQ44EE-AS2R acts as a QSPI-compatible isolator for daisy-chained ADCs, enabling high-resolution cell voltage reads at >1 MSPS aggregate rates. Use Value: 150 Mbps data rate supports simultaneous 16-bit reads from 8 cells within single QSPI frame, reducing polling latency. |
| Onboard EV Chargers | Isolated Switch-Mode Power Supplies |
Use Scenario: Isolating digital control signals between AC/DC PFC stage and DC/DC LLC converter in bi-directional OBC designs. IC Role / Device Role / Timing Role: SI86SQ44EE-AS2R carries bidirectional telemetry (temperature, fault flags, status) and command signals across isolation barrier with fail-safe defaults. Use Value: Selectable default-low output ensures gate drivers disable safely during VDD2 brownout in secondary-side control loops. | Use Scenario: Isolating feedback signals (voltage, current, temperature) from secondary-side sensing circuits to primary-side PWM controller. IC Role / Device Role / Timing Role: SI86SQ44EE-AS2R replaces optocouplers in digitally controlled SMPS, delivering faster transient response via low-latency analog-to-digital interface isolation. Use Value: 2.25–5.5 V supply range allows direct interfacing with both 3.3 V ADCs and 5 V controllers without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3481ARWZ | 4-channel, fixed unidirectional (2 forward + 2 reverse); no DIR pin; max 25 Mbps | Lacks QSPI-direction control and speed for high-bandwidth memory interfaces | Choose ADUM3481ARWZ only for cost-sensitive, lower-speed industrial I/O where bidirectionality is managed externally |
| ISO6741QDWR | 4-channel, unidirectional only; no direction control; 50 Mbps max; 3000 VRMS isolation | Insufficient isolation rating and bandwidth for automotive traction inverter control | Use ISO6741QDWR in non-safety-critical 24 V PLC modules where 3000 VRMS suffices and direction is static |
Compared with ADUM3481ARWZ and ISO6741QDWR, SI86SQ44EE-AS2R uniquely delivers QSPI-optimized bidirectional isolation at 150 Mbps with 6000 VRMS reinforced rating-enabling single-chip replacement of multiple discrete isolators in high-reliability EV and industrial power systems.
Availability
SI86SQ44EE-AS2R is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and onboard EV chargers requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for SI86SQ44EE-AS2R 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 Si86Sxx family-including SI86SQ44EE-AS2R-is designed specifically for high-reliability, high-speed digital isolation in automotive, industrial, and medical systems demanding reinforced safety certification and sub-10 ns timing precision.
FAQ
What is the isolation voltage rating of SI86SQ44EE-AS2R and which standards does it meet?
SI86SQ44EE-AS2R provides 6000 VRMS reinforced isolation per UL 1577 (1 minute), certified to IEC 60747-17, CSA 62368-1, and CQC GB4943.1. This rating is validated for the WB SOIC-16 package and supports end-equipment compliance in industrial and automotive applications up to 1000 VAC working voltage.
How does the DIR and ISO_DIR functionality work in SI86SQ44EE-AS2R?
In SI86SQ44EE-AS2R, the DIR pin (pin 7) is a side-A input that configures all four data channels for A→B (DIR = high) or B→A (DIR = low) flow. ISO_DIR (pin 9) is a side-B output that replicates the DIR state across the isolation barrier, enabling synchronized logic on the isolated side without additional isolators.
Does SI86SQ44EE-AS2R require external start-up initialization or configuration?
No, SI86SQ44EE-AS2R requires no start-up initialization. It begins operating immediately upon VDD1 and VDD2 exceeding UVLO+ (2.18 V), with deterministic output behavior governed by fail-safe settings and enable pin states. The RF modulation architecture eliminates boot ROM or handshake sequences.
What are the supply voltage requirements for SI86SQ44EE-AS2R and how do they affect interoperability?
SI86SQ44EE-AS2R operates from 2.25 V to 5.5 V on both VDD1 and VDD2, allowing direct interface with 3.3 V microcontrollers and 5 V peripherals without level shifters. This dual-voltage flexibility supports mixed-signal systems such as isolated ADC interfaces and QSPI flash memory links in automotive ECUs.
Can SI86SQ44EE-AS2R be used in AEC-Q100 qualified automotive applications?
Yes, SI86SQ44EE-AS2R is AEC-Q100 qualified (Grade 1, –40 to +125 °C) and built using automotive-specific manufacturing flows. It supports PPAP documentation, IMDS/CAMDS reporting, and is approved for use in onboard chargers, battery management systems, and traction inverters per automotive functional safety requirements.
SI86SQ44EE-AS2R 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:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 6000Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86SQ44EE-AS2R FAQ
1.How can I place an order for SI86SQ44EE-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SQ44EE-AS2R 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 SI86SQ44EE-AS2R reliable?
The price and inventory of SI86SQ44EE-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SQ44EE-AS2R is usually 5 days.
3.What payment methods are accepted for SI86SQ44EE-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SQ44EE-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SQ44EE-AS2R?
SI86SQ44EE-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SQ44EE-AS2R 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 SI86SQ44EE-AS2R?
For technical support, including SI86SQ44EE-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SQ44EE-AS2R requirements.
6.How does Aetrix verify that SI86SQ44EE-AS2R is sourced from the original manufacturer or authorized distributors?
All SI86SQ44EE-AS2R 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 SI86SQ44EE-AS2R meets industry standards.
7.What is the process for return or replacement of SI86SQ44EE-AS2R?
All SI86SQ44EE-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SQ44EE-AS2R, 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 SI86SQ44EE-AS2R part is unused and in its original packaging.
Return procedure for SI86SQ44EE-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SQ44EE-AS2R 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
