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Skyworks Solutions Inc. SI86SM42BC-IS1
- Part No.:
- SI86SM42BC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SM42BC-IS1.pdf
- Description:
- 3.75 KVRMS SLEEP MODE ISOLATOR,
- Quantity:
- Payment:
- Shipping:
Inventory:1,562
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Product details
Overview
SI86SM42BC-IS1 from Skyworks Solutions is a 4-channel reinforced digital isolator with two forward and two reverse signal paths, 6000 VRMS isolation rating, AEC-Q100 qualification, and integrated sleep mode control (SMb pin). It operates across 2.25–5.5 V supplies, supports up to 150 Mbps data rate, and delivers 10 ns typical propagation delay - enabling robust signal integrity in high-noise automotive battery management and traction inverter interfaces.
For engineers reviewing the SI86SM42BC-IS1 datasheet, SI86SM42BC-IS1 pinout, SI86SM42BC-IS1 application, or SI86SM42BC-IS1 equivalent, key selection considerations include its reinforced IEC 60747-17 insulation, fail-safe default-high/low output option, tri-state outputs with enable, Schmitt-trigger + CMOS input thresholds, and 100 kV/µs CMTI performance for motor control gate driver isolation.
Technical Context
The SI86SM42BC-IS1 implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and providing inherent noise immunity without optical degradation. Its architecture includes dedicated transmitter/receiver pairs per channel, independent UVLO and reset circuitry per side (VDD1/VDD2), and a dedicated SMb pin that places both sides into low-power sleep mode (750 µA/side) while retaining one active channel to monitor SMb state.
It features bidirectional channel configuration (A1–A4 ↔ B1–B4), tri-state output control via EN1/EN2, selectable fail-safe output state during unpowered conditions, and 36 ns input deglitch filtering - all within a WB SOIC-16 package rated for –40 °C to +125 °C operation and compliant with UL 1577, CSA 62368-1/60601-1, VDE 60747-17, and CQC GB4943.1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed SPI, isolated ADC/DAC interfaces, and real-time motor control feedback loops. |
| Isolation Rating | 6000 VRMS (1 min) - enables use in reinforced insulation systems for onboard chargers and traction inverters per IEC 62109 and ISO 6469. |
| Propagation Delay | 10 ns typical - ensures tight timing alignment between controller and power stage in isolated gate driver applications. |
| Supply Voltage | 2.25 V to 5.5 V - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| CMTI | ≥100 kV/µs - prevents false triggering in high-dV/dt environments like SiC/GaN inverter switching nodes. |
| Operating Temp | –40 °C to +125 °C - meets automotive under-hood and industrial control cabinet thermal requirements. |
| Sleep Current | 750 µA per side - reduces system standby power in battery management systems during idle states. |
Pinout & Package
SI86SM42BC-IS1 is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance ≥8.3 mm, supporting 6000 VRMS reinforced insulation per UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A supply and ground | Power domain for input-side logic (e.g., MCU GPIO or SPI controller); requires 0.1 µF + 10 µF bypassing. |
| A1–A4 | Side A digital I/O | Four bidirectional signal inputs/outputs on controller side; support Schmitt-trigger + CMOS thresholds for noise immunity. |
| SMb | Sleep mode control (active low) | Drives device into 750 µA/side sleep mode; internal pull-up ensures wake-on-assertion when released. |
| Isolation Barrier | Internal RF coupling barrier | Semiconductor-based dielectric barrier enabling galvanic isolation without optocoupler aging or LED drift. |
| B1–B4 | Side B digital I/O | Four isolated outputs/inputs on power-stage side (e.g., gate drivers, current sensors); electrically separated from Side A. |
| VDD2, GND2 | Side B supply and ground | Independent power domain for isolated peripherals; supports different voltage rails than Side A. |
| NC | No connect | Pin 9 is unconnected - must be left floating or grounded per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced IEC 60747-17 rating | Validated for functional safety-critical systems requiring dual insulation barriers, including ISO 26262 ASIL-B/C automotive subsystems. |
| Sleep mode with SMb pin | Reduces total quiescent current to 1.5 mA (750 µA/side) while retaining wake capability - critical for always-on BMS monitoring. |
| Selectable fail-safe output | Default-high or default-low output state during VDD loss ensures predictable gate driver or fault-signaling behavior in power failure events. |
| Tri-state outputs with EN1/EN2 | Enables bus sharing and hot-swap compatibility by disabling outputs without disrupting isolation barrier integrity. |
| 36 ns input deglitch filter | Rejects sub-36 ns EMI-induced transients on motor control feedback lines, preventing spurious interrupts or erroneous sampling. |
| AEC-Q100 Grade 1 | Qualified for automotive applications with full temperature range (–40 °C to +125 °C) and extended reliability testing per stress test conditions. |
Applications
| Automotive Battery Management | Industrial Motor Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring and balancing signals between high-voltage battery stack and low-voltage MCU. IC Role / Device Role / Timing Role: SI86SM42BC-IS1 provides four isolated bidirectional channels to relay ADC data and balance commands across 400–800 V domains. Use Value: 6000 VRMS rating and 100 kV/µs CMTI prevent measurement corruption during fast-switching inverter operation. |
Use Scenario: Isolating PWM gate drive signals and current sense feedback in 3-phase inverter drives. IC Role / Device Role / Timing Role: SI86SM42BC-IS1 delivers matched forward/reverse latency (10 ns typ.) for synchronized high-side/low-side FET control. Use Value: Precise propagation delay matching minimizes shoot-through risk in SiC/GaN half-bridge configurations. |
| Onboard Charger Interface | Traction Inverter Control |
|
Use Scenario: Isolating communication between OBC controller and AC/DC power stage for safety-critical status reporting. IC Role / Device Role / Timing Role: SI86SM42BC-IS1 carries fault flags, temperature alerts, and enable signals across reinforced insulation barrier. Use Value: AEC-Q100 qualification and UL/VDE certification ensure compliance with ISO 15118 and UL 2202 requirements. |
Use Scenario: Isolating torque command, resolver feedback, and DC-link voltage sensing in EV traction inverters. IC Role / Device Role / Timing Role: SI86SM42BC-IS1 routes encoder signals and safety shutdown commands with fail-safe default-low output. Use Value: Sleep mode (SMb) reduces standby power consumption during vehicle park mode without compromising wake responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4402BRWZ | 4-channel, 100 Mbps, 5000 VRMS, no sleep mode, 16-lead SOIC (standard body) | Lacks SMb pin and AEC-Q100 qualification; suitable for industrial but not automotive BMS | Choose ADUM4402BRWZ only if sleep mode and automotive qualification are not required. |
| ISO7741FDWR | 4-channel, 100 Mbps, 5000 VRMS, 16-pin SOIC, no SMb, lower CMTI (85 kV/µs) | Lower isolation rating and CMTI limit use in high-dV/dt traction inverters | Select ISO7741FDWR for cost-sensitive industrial PLCs where 6000 VRMS is not mandated. |
Compared with ADUM4402BRWZ and ISO7741FDWR, SI86SM42BC-IS1 uniquely combines 6000 VRMS reinforced isolation, AEC-Q100 Grade 1, and hardware-controlled sleep mode - making it the only option qualified for ASIL-B battery disconnect monitoring and high-CMTI gate driver interfaces in EV powertrains.
Availability
SI86SM42BC-IS1 is available at Aetrix Electronics and suitable for automotive battery management systems, traction inverter controls, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for Tier-1 OEM programs.
Supply support for SI86SM42BC-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for high-reliability applications.
The Si86Sxx family was designed specifically for automotive and industrial systems demanding reinforced isolation, high CMTI, and AEC-Q100 compliance - with SI86SM42BC-IS1 targeting battery electric vehicle (BEV) and hybrid electric vehicle (HEV) powertrain subsystems.
FAQ
What is the isolation voltage rating of SI86SM42BC-IS1 and which safety standards does it meet?
SI86SM42BC-IS1 provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation), CSA 62368-1/60601-1, and CQC GB4943.1. This enables its use in safety-critical automotive applications such as onboard chargers and battery management systems where double insulation is mandated. The wide-body SOIC-16 package ensures ≥8.3 mm creepage and clearance to meet end-equipment standards like ISO 6469 and IEC 62109.
Does SI86SM42BC-IS1 support fail-safe output configuration, and how is it implemented?
Yes, SI86SM42BC-IS1 offers selectable fail-safe output behavior - default-high or default-low - determined by ordering option (denoted in the part number suffix). When VDD1 or VDD2 falls below UVLO threshold, outputs transition to the pre-configured safe state. This ensures predictable behavior during power loss in gate driver or fault-monitoring circuits. The setting is fixed at manufacture and cannot be changed in-system.
How does the SMb pin function in SI86SM42BC-IS1, and what is its impact on power consumption?
The SMb pin in SI86SM42BC-IS1 is an active-low sleep mode control input. When pulled low, it places both sides of the isolator into sleep mode, reducing total supply current to 1.5 mA (750 µA per side). One channel remains active to monitor SMb, enabling immediate wake-up when SMb is released (pulled high via internal pull-up). This feature is essential for low-power BMS monitoring during vehicle standby.
What is the maximum data rate supported by SI86SM42BC-IS1, and how does it perform at high temperatures?
SI86SM42BC-IS1 supports DC to 150 Mbps data rate across its full operating temperature range of –40 °C to +125 °C. Electrical specifications including propagation delay (10 ns typ.), pulse width distortion (3.5 ns typ.), and CMTI (≥100 kV/µs) are guaranteed over this range. No derating is required up to 125 °C ambient, making it suitable for under-hood automotive and industrial inverter environments.
Can SI86SM42BC-IS1 be used in SPI isolation applications, and what channel configuration is required?
SI86SM42BC-IS1 is not a dedicated SPI isolator (like Si86SS41/51) but supports SPI interface implementation using its four bidirectional channels: A1/B1 for MOSI/MISO, A2/B2 for SCLK, A3/B3 for CS#, and A4/B4 for optional interrupt or ready signaling. Direction is managed externally; no built-in SPI protocol logic is present. For fully integrated SPI isolation, Si86SS51 is recommended instead.
SI86SM42BC-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:
- 2/2
- 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
SI86SM42BC-IS1 FAQ
1.How can I place an order for SI86SM42BC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SM42BC-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 SI86SM42BC-IS1 reliable?
The price and inventory of SI86SM42BC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SM42BC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86SM42BC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SM42BC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SM42BC-IS1?
SI86SM42BC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SM42BC-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 SI86SM42BC-IS1?
For technical support, including SI86SM42BC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SM42BC-IS1 requirements.
6.How does Aetrix verify that SI86SM42BC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86SM42BC-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 SI86SM42BC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86SM42BC-IS1?
All SI86SM42BC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SM42BC-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 SI86SM42BC-IS1 part is unused and in its original packaging.
Return procedure for SI86SM42BC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SM42BC-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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