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Skyworks Solutions Inc. SI86SM40BC-IS1
- Part No.:
- SI86SM40BC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SM40BC-IS1.pdf
- Description:
- 3.75 KVRMS SLEEP MODE ISOLATOR,
- Quantity:
- Payment:
- Shipping:
Inventory:2,373
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Product details
Overview
SI86SM40BC-IS1 from Skyworks Solutions is a 4-channel reinforced digital isolator with sleep mode control (SMb pin), 6000 VRMS isolation rating, 150 Mbps data rate, and operation across –40 to 125 °C for automotive and industrial isolated signal interfaces in battery management systems and motor drives.
For engineers reviewing the SI86SM40BC-IS1 datasheet, SI86SM40BC-IS1 pinout, SI86SM40BC-IS1 application, or SI86SM40BC-IS1 equivalent, this device delivers fail-safe output configuration, Schmitt-trigger inputs with CMOS thresholds, 10 ns typical propagation delay, and tri-state outputs with enable-critical for high-noise, safety-critical isolated communication links.
Technical Context
The SI86SM40BC-IS1 implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity without optical degradation. It supports bidirectional channel configuration via side-specific enable pins (EN1/EN2) and global sleep control via SMb.
Its architecture integrates undervoltage lockout (UVLO+ = 2.18 V, UVLO– = 2.05 V) and reset circuitry (RSTB– ≈ 1.7 V) per side, ensuring deterministic behavior during power transitions. The device uses internal 50 Ω output impedance drivers and requires 0.1 µF + 10 µF bypass capacitors on both VDD1 and VDD2 rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, CAN FD, and real-time control loop signaling. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements per UL 1577 and IEC 60747-17 for >1000 V working voltage systems. |
| Propagation delay | 10 ns typical - enables sub-100 ns round-trip latency in closed-loop feedback paths. |
| Supply voltage | 2.25 to 5.5 V - interoperable with 3.3 V and 5 V logic domains without level shifters. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient environments. |
| Pulse width distortion | 3.5 ns typical - preserves duty cycle integrity for clock forwarding and PWM isolation. |
| Transient immunity | ≥100 kV/µs - resists fast common-mode transients in motor drive and inverter gate driver circuits. |
Pinout & Package
SI86SM40BC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin functions are validated per Figure 3 (Si86SM4x) and Table 1 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A supply and ground | Power domain for input-side channels (A1–A4); requires local 0.1 µF + 10 µF bypassing. |
| A1–A4 | Side A digital I/O | Four unidirectional or bidirectional isolated input channels; Schmitt-trigger + CMOS threshold inputs. |
| SMb | Sleep mode control | Active-low pin that places entire device-including isolated side-into 750 µA/side sleep mode; high or open = active. |
| Isolation Barrier | Die-level insulation | Robust semiconductor barrier certified to VDE 60747-17, UL 1577, CSA 62368-1, CQC GB4943.1. |
| B1–B4 | Side B digital I/O | Four corresponding isolated output channels; tri-state capable via EN2 control. |
| VDD2, GND2 | Side B supply and ground | Independent power domain for output-side logic; enables galvanic separation of control and power stages. |
| NC | No-connect terminal | Pin 9 is unconnected; must remain floating-no PCB trace or pull-up/down required. |
Key Features
| Feature | Design Value |
|---|---|
| Sleep mode (SMb) | Reduces total quiescent current to 750 µA per side while retaining wake-on-SMb capability-ideal for intermittent telemetry in BMS. |
| Fail-safe output selection | Ordering option sets default output state (high or low) during VDD1 loss-ensures safe shutdown in traction inverter gate drivers. |
| High CMTI immunity | ≥100 kV/µs common-mode transient immunity prevents false triggering in noisy 650 V/1200 V SiC/GaN inverter environments. |
| No start-up initialization | RF modulation architecture eliminates boot-time delays or configuration sequences-enables immediate signal pass-through at power-on. |
| Tri-state outputs with EN2 | EN2 pin disables all B-side outputs simultaneously, allowing bus sharing or hot-swap isolation in modular power systems. |
Applications
| Battery Management System (BMS) | Industrial Motor Drive |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and pack-level communication between high-voltage battery stack and MCU. IC Role / Device Role / Timing Role: SI86SM40BC-IS1 provides four independent isolated channels for analog front-end ADC interface and digital status reporting across 400–800 V DC bus. Use Value: 6000 VRMS isolation and 125 °C operation ensure long-term reliability in thermally stressed battery enclosures. |
Use Scenario: Isolating PWM signals and fault feedback between MCU and three-phase IGBT/SiC gate drivers. IC Role / Device Role / Timing Role: SI86SM40BC-IS1 forwards gate drive enable/disable commands and returns desaturation fault signals with <10 ns skew. Use Value: 3.5 ns pulse width distortion preserves dead-time accuracy critical for preventing shoot-through in inverter half-bridges. |
| Onboard Charger (OBC) | Traction Inverter Control |
|
Use Scenario: Isolating AC-to-DC controller signals and DC-link voltage sensing in EV onboard chargers. IC Role / Device Role / Timing Role: SI86SM40BC-IS1 separates primary-side PFC control and secondary-side LLC regulation logic across 1000 V isolation barrier. Use Value: Reinforced insulation certification (IEC 60747-17) satisfies functional safety requirements for EV charging infrastructure. |
Use Scenario: Isolating torque command, speed feedback, and thermal protection signals between vehicle controller and inverter ECU. IC Role / Device Role / Timing Role: SI86SM40BC-IS1 enables real-time, low-latency communication with fail-safe default-low outputs during MCU brownout. Use Value: AEC-Q100 qualification and –40 to 125 °C operation support ASIL-B system integration in electric drivetrain modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4402BRIZ | 4-channel, 100 Mbps, 5000 VRMS, no sleep mode pin, 2.7–5.5 V supply | Lacks SMb control and 6000 VRMS rating; suitable for non-automotive industrial use only | Choose when sleep mode is unnecessary and 5000 VRMS suffices for system safety margin |
| ISO7741FDWR | 4-channel, 100 Mbps, 5000 VRMS, 2.25–5.5 V, no SMb, lower CMTI (85 kV/µs) | Lower transient immunity and isolation rating; not AEC-Q100 qualified | Prefer for cost-sensitive consumer-grade isolated interfaces where automotive qualification is not required |
Compared with ADUM4402BRIZ and ISO7741FDWR, SI86SM40BC-IS1 uniquely combines 6000 VRMS reinforced isolation, AEC-Q100 qualification, integrated sleep mode (SMb), and 150 Mbps bandwidth-making it the only option qualified for high-reliability automotive traction and charging subsystems requiring active power gating.
Availability
SI86SM40BC-IS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for SI86SM40BC-IS1 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 for wireless, automotive, and industrial markets.
The Si86Sxx family was designed specifically for high-reliability galvanic isolation in safety-critical systems-emphasizing reinforced insulation, wide temperature operation, and RF-based noise resilience over legacy optocoupler architectures.
FAQ
What is the isolation voltage rating of SI86SM40BC-IS1 and which safety standards does it meet?
SI86SM40BC-IS1 provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced), CSA 62368-1/60601-1, and CQC GB4943.1. Its wide-body SOIC-16 package achieves ≥10.3 mm creepage and clearance, enabling use in 1000 V DC systems like EV battery packs and industrial inverters where reinforced insulation is mandated.
How does the SMb pin function in SI86SM40BC-IS1, and what is its impact on power consumption?
The SMb pin in SI86SM40BC-IS1 is an active-low sleep mode control. When pulled low, it reduces total device current to 750 µA per side while keeping one channel active to monitor SMb state. When high or open, SI86SM40BC-IS1 operates normally. This enables dynamic power gating in battery-powered telemetry nodes without sacrificing wake responsiveness.
Does SI86SM40BC-IS1 support fail-safe output configuration, and how is it implemented?
Yes, SI86SM40BC-IS1 offers selectable fail-safe mode via ordering option: default-high or default-low output state when VDD1 is unpowered but VDD2 remains active. This behavior is defined in Table 4 of the datasheet and ensures predictable shutdown states in safety-critical applications like motor control and BMS-without requiring external pull resistors or logic.
What are the key timing specifications of SI86SM40BC-IS1, and how do they affect system design?
SI86SM40BC-IS1 features 10 ns typical propagation delay and 3.5 ns typical pulse width distortion. These values enable precise timing alignment in closed-loop control systems-such as gate driver signal forwarding-where sub-20 ns channel-to-channel skew and minimal duty cycle distortion are essential to prevent shoot-through or timing violations in SiC/GaN inverters.
Is SI86SM40BC-IS1 qualified for automotive applications, and what evidence supports this?
Yes, SI86SM40BC-IS1 is AEC-Q100 qualified and supported by AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and automotive-specific manufacturing flows. Its –40 to 125 °C operating range, reinforced isolation, and transient immunity ≥100 kV/µs meet functional safety requirements for onboard chargers, battery management, and traction inverter subsystems in BEV/HEV platforms.
SI86SM40BC-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 3750Vrms
- 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
SI86SM40BC-IS1 FAQ
1.How can I place an order for SI86SM40BC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SM40BC-IS1 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 SI86SM40BC-IS1 reliable?
The price and inventory of SI86SM40BC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SM40BC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86SM40BC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SM40BC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SM40BC-IS1?
SI86SM40BC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SM40BC-IS1 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 SI86SM40BC-IS1?
For technical support, including SI86SM40BC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SM40BC-IS1 requirements.
6.How does Aetrix verify that SI86SM40BC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86SM40BC-IS1 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 SI86SM40BC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86SM40BC-IS1?
All SI86SM40BC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SM40BC-IS1, 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 SI86SM40BC-IS1 part is unused and in its original packaging.
Return procedure for SI86SM40BC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SM40BC-IS1 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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