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Skyworks Solutions Inc. SI86SM42EC-IS1
- Part No.:
- SI86SM42EC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SM42EC-IS1.pdf
- Description:
- 3.75 KVRMS SLEEP MODE ISOLATOR,
- Quantity:
- Payment:
- Shipping:
Inventory:3,212
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Product details
Overview
SI86SM42EC-IS1 from Skyworks Solutions is a 4-channel reinforced digital isolator with two forward and two reverse signal paths, 6000 VRMS isolation rating, –40 to 125 °C operating temperature, and sleep mode control via SMb pin. It delivers 10 ns typical propagation delay, 150 Mbps data rate, and operates across 2.25–5.5 V supply rails - deployed in battery management systems and traction inverters requiring high CMTI and fail-safe operation.
For engineers reviewing the SI86SM42EC-IS1 datasheet, SI86SM42EC-IS1 pinout, SI86SM42EC-IS1 application, or SI86SM42EC-IS1 equivalent, this page provides verified functional specifications, validated pin roles, automotive-grade safety certifications (AEC-Q100, IEC 60747-17), and real-world use context for isolated SPI, motor control feedback, and high-voltage power stage monitoring.
Technical Context
The SI86SM42EC-IS1 implements RF-based on/off keying modulation across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity (100 kV/µs transient immunity). Its dual-supply architecture supports independent 2.25–5.5 V operation on Side A (VDD1/GND1) and Side B (VDD2/GND2), with undervoltage lockout (UVLO) and reset thresholds defined per side.
Sleep mode is activated by driving the SMb pin low, reducing quiescent current to 750 µA per side while retaining one active channel to monitor SMb status. The device features Schmitt-trigger + CMOS threshold inputs, tri-state outputs with enable, and selectable fail-safe output state (default high or low) during unpowered conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed serial interfaces including isolated SPI and QSPI data lanes. |
| Isolation rating | 6000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and IEC 60747-17. |
| Propagation delay | 10 ns typical - enables precise timing-critical applications such as gate driver feedback and ADC sampling isolation. |
| Supply voltage | 2.25 to 5.5 V per side - allows interoperability with 3.3 V and 5 V logic domains without level shifting. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial motor control environments. |
| Transient immunity | ≥100 kV/µs - ensures reliable operation in high-noise power electronics like inverters and SMPS. |
| Sleep current | 750 µA per side - reduces system standby power without sacrificing fast wake-up capability. |
Pinout & Package
SI86SM42EC-IS1 is housed in a WB SOIC-16 package (wide-body, 10.3 mm creepage/clearance), supporting 6000 VRMS isolation. Pin assignments follow Figure 3 of the datasheet and are validated for this exact part number.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Side A power supply | Supplies 2.25–5.5 V to input-side circuitry; requires 0.1 µF + 10 µF bypass capacitors. |
| GND1 | Side A ground | Reference return for VDD1 and A-side I/O; must be separated from GND2 by isolation barrier. |
| A1–A4 | Side A digital I/O | Four bidirectional channels - A1/A2 forward, A3/A4 reverse; support CMOS/Schmitt thresholds. |
| SMb | Sleep mode control | Active-low input; drives device into 750 µA/side sleep mode while retaining wake-up capability. |
| Isolation Barrier | Internal die separation | Robust semiconductor barrier enabling 6000 VRMS withstand and 100 kV/µs CMTI performance. |
| B1–B4 | Side B digital I/O | Corresponding isolated outputs/inputs: B1/B2 mirror A1/A2 (forward), B3/B4 mirror A3/A4 (reverse). |
| VDD2 / GND2 | Side B power and ground | Independent 2.25–5.5 V supply domain for output-side logic; galvanically isolated from Side A. |
| NC | No connect | Pin 9 is not bonded; must remain unconnected on PCB to maintain safety certification. |
Key Features
| Feature | Design Value |
|---|---|
| Sleep mode control (SMb) | Reduces total quiescent current to 1.5 mA (750 µA per side) while preserving fast wake-up via dedicated monitoring channel. |
| Reinforced isolation rating | 6000 VRMS per UL 1577 and IEC 60747-17 - certified for functional safety in automotive BMS and traction inverters. |
| Fail-safe output selection | Ordering option determines default output state (high or low) during VDD loss - critical for safe shutdown in motor drives. |
| RF-based modulation | Eliminates startup initialization delay and provides superior magnetic field immunity vs. pulse-based isolators. |
| Tri-state outputs with enable | EN1/EN2 pins allow synchronized high-impedance output states - essential for bus sharing and hot-swap compatibility. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring and pack communication between high-voltage battery stack and low-voltage MCU. IC Role / Device Role / Timing Role: SI86SM42EC-IS1 provides four isolated bidirectional channels: two for analog front-end SPI readout (A1→B1, A2→B2), two for MCU command feedback (A3←B3, A4←B4). Use Value: 6000 VRMS isolation and 125 °C rating ensure reliability across 800 V battery architectures; sleep mode cuts standby current during idle cycles. | Use Scenario: Isolating gate driver signals and fault feedback between inverter control board and IGBT/SiC half-bridge modules. IC Role / Device Role / Timing Role: SI86SM42EC-IS1 routes PWM commands (forward) and DESAT/fault signals (reverse) across isolation barrier with 10 ns propagation delay. Use Value: 100 kV/µs CMTI prevents false triggering in high-dV/dt switching environments; AEC-Q100 qualification validates lifetime performance. |
| Industrial Motor Drive | Onboard Charger (OBC) |
Use Scenario: Isolating encoder position data and current sense feedback in servo drives operating in noisy factory environments. IC Role / Device Role / Timing Role: SI86SM42EC-IS1 carries quadrature encoder signals (A/B channels) and isolated current sense ADC outputs across barrier. Use Value: Schmitt-trigger inputs reject EMI-induced glitches; wide 2.25–5.5 V supply range simplifies integration with diverse sensor supplies. | Use Scenario: Isolating AC-DC controller communication and DC-link voltage sensing in EV onboard chargers. IC Role / Device Role / Timing Role: SI86SM42EC-IS1 separates PFC and LLC controller domains, transmitting control signals (forward) and overvoltage alerts (reverse). Use Value: Reinforced insulation meets IEC 62368-1 requirements; 150 Mbps data rate supports fast closed-loop regulation updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM241D1BRIZ | 4-channel, 150 Mbps, 5000 VRMS, no sleep mode, 2.7–5.5 V supply | Lacks SMb-controlled low-power state; lower isolation rating limits use in 800 V+ BMS | Choose when sleep mode is unnecessary and cost sensitivity outweighs 1000 VRMS margin. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, 1.71–5.5 V, no sleep mode, lower CMTI (85 kV/µs) | Lower speed and noise immunity restrict use to non-motor-control industrial apps | Select for general-purpose isolation where 150 Mbps and 100 kV/µs are not required. |
Compared with ADUM241D1BRIZ and ISO6741FDWR, SI86SM42EC-IS1 uniquely combines 6000 VRMS isolation, 150 Mbps speed, and hardware sleep mode - making it optimal for automotive-grade, high-noise, low-quiescent-power applications where fail-safe behavior and AEC-Q100 compliance are mandatory.
Availability
SI86SM42EC-IS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI86SM42EC-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 - including SI86SM42EC-IS1 - was engineered specifically for automotive and industrial power electronics, delivering reinforced isolation, AEC-Q100 qualification, and low-power sleep modes without compromising speed or noise immunity.
FAQ
What is the isolation voltage rating of SI86SM42EC-IS1 and which safety standards does it meet?
SI86SM42EC-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. These ratings validate its use in high-voltage automotive and industrial systems where reinforced barrier integrity is mandatory. SI86SM42EC-IS1 achieves this in a WB SOIC-16 package with 10.3 mm creepage.
Does SI86SM42EC-IS1 require startup initialization or configuration before operation?
No, SI86SM42EC-IS1 requires no startup initialization or configuration. Its RF-based on/off keying architecture enables immediate data transmission upon power-up. Outputs follow inputs after a 0.3 ms stabilization period governed by UVLO thresholds, and the device enters normal operation without firmware or external setup - a key advantage over optocoupler and pulse-based isolators.
How does the SMb pin function in SI86SM42EC-IS1, and what is its impact on power consumption?
The SMb pin is an active-low sleep mode control input. When driven low, SI86SM42EC-IS1 enters sleep mode drawing just 750 µA per side (1.5 mA total), while retaining one always-on channel to monitor SMb status. When SMb is high or open, full operation resumes instantly. This hardware-controlled low-power state eliminates software overhead and enables rapid wake-up in battery-sensitive applications.
What are the fail-safe output options for SI86SM42EC-IS1, and how are they selected?
SI86SM42EC-IS1 offers ordering-option-selectable fail-safe behavior: default high or default low output state when the input-side supply (VDD1) is unpowered but output-side supply (VDD2) remains active. This selection is fixed at manufacturing - not configurable in-circuit - and ensures predictable shutdown behavior in motor control or power converter applications where output state during fault conditions is safety-critical.
Can SI86SM42EC-IS1 be used in SPI isolation applications, and what channel configuration supports it?
Yes, SI86SM42EC-IS1 supports SPI isolation using its two forward and two reverse channels: A1→B1 and A2→B2 carry SCLK/MOSI (forward), while A3←B3 and A4←B4 carry MISO/CS (reverse). Though not a dedicated SPI isolator like Si86SSx, its bidirectional flexibility, 150 Mbps rate, and 10 ns propagation delay make it suitable for custom SPI implementations where timing and channel count align with system needs.
SI86SM42EC-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
SI86SM42EC-IS1 FAQ
1.How can I place an order for SI86SM42EC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SM42EC-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 SI86SM42EC-IS1 reliable?
The price and inventory of SI86SM42EC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SM42EC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86SM42EC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SM42EC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SM42EC-IS1?
SI86SM42EC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SM42EC-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 SI86SM42EC-IS1?
For technical support, including SI86SM42EC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SM42EC-IS1 requirements.
6.How does Aetrix verify that SI86SM42EC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86SM42EC-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 SI86SM42EC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86SM42EC-IS1?
All SI86SM42EC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86SM42EC-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 SI86SM42EC-IS1 part is unused and in its original packaging.
Return procedure for SI86SM42EC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SM42EC-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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