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Skyworks Solutions Inc. SI86SM40EC-IS1R
- Part No.:
- SI86SM40EC-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86SM40EC-IS1R.pdf
- Description:
- 3.75 KVRMS SLEEP MODE ISOLATOR,
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
SI86SM40EC-IS1R 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. It provides bidirectional signal isolation between microcontroller peripherals and high-voltage motor control subsystems in battery management systems.
For engineers reviewing the SI86SM40EC-IS1R datasheet, SI86SM40EC-IS1R pinout, SI86SM40EC-IS1R application, or SI86SM40EC-IS1R equivalent, key selection criteria include its 10 ns typical propagation delay, 3.5 ns pulse width distortion, fail-safe default-low output option, and automotive-grade AEC-Q100 qualification for traction inverter gate drive interfaces.
Technical Context
The SI86SM40EC-IS1R implements RF-based on/off keying across a semiconductor isolation barrier, eliminating startup initialization and enabling robust noise immunity up to 100 kV/µs. Its architecture supports independent side-A and side-B undervoltage lockout (UVLO) with RSTB reset thresholds at ~1.7 V and 0.3 ms start-up time.
Sleep mode is controlled via the active-low SMb pin, which places both sides into low-power state (750 µA per side) while retaining one always-on channel to monitor SMb status. The device features Schmitt-trigger + CMOS threshold inputs, tri-state outputs with enable, and selectable fail-safe output polarity during power loss.
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 - meets reinforced insulation requirements per UL 1577, VDE 60747-17, and IEC 62368-1 for industrial and automotive safety-critical systems. |
| Propagation delay | 10 ns typical - enables tight timing budgets in closed-loop control systems such as traction inverters and onboard chargers. |
| Pulse width distortion | 3.5 ns typical - preserves signal integrity in high-frequency PWM and encoder signal isolation applications. |
| Supply voltage | 2.25 to 5.5 V - allows direct interfacing with 3.3 V and 5 V logic domains without level-shifting circuitry. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive use and industrial automation environments with wide thermal swings. |
| Transient immunity | ≥100 kV/µs - ensures reliable operation in high-noise motor drive and power inverter applications with fast switching transients. |
Pinout & Package
SI86SM40EC-IS1R is housed in a WB SOIC-16 (wide-body small-outline integrated circuit) package with creepage/clearance optimized for 6000 VRMS working voltage. The package complies with RoHS and supports automated optical inspection (AOI) and reflow soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply and ground | Provides isolated power domain for controller-side logic (e.g., MCU GPIO, SPI master); requires 0.1 µF + 10 µF bypass capacitors. |
| A1–A4 | Side A digital I/O | Four unidirectional input channels from controller side; compatible with CMOS/Schmitt-trigger logic levels. |
| SMb | Sleep mode control (active low) | Drives device into 750 µA/side sleep state; retains wake-up capability via dedicated always-on monitoring channel. |
| Isolation Barrier | Internal RF-coupled dielectric barrier | Provides galvanic isolation; no optocoupler aging or LED degradation; supports 6000 VRMS withstand for 1 minute per UL 1577. |
| B1–B4 | Side B digital I/O | Four corresponding isolated output channels to high-voltage side (e.g., gate drivers, sensor front-ends). |
| VDD2, GND2 | Side B power supply and ground | Independent power domain for isolated side; supports separate 3.3 V or 5 V rail; decoupling required per side. |
| NC | No connect | Pin 9 is internally unconnected; must remain floating or grounded per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Sleep mode with SMb pin | Reduces quiescent current to 750 µA per side while maintaining wake-up readiness-critical for low-duty-cycle BMS monitoring circuits. |
| Reinforced IEC 60747-17 rating | Validates suitability for functional safety applications in EV traction inverters and medical isolation barriers without additional system-level certification overhead. |
| Fail-safe default-low output | Ensures safe shutdown state (e.g., gate driver disable) during VDD1 loss-matches SI86SM40EC-IS1R's "EC" ordering suffix designation. |
| 100 kV/µs CMTI | Prevents false triggering in high-dV/dt environments like SiC/GaN inverter switching nodes, eliminating need for external filtering. |
| AEC-Q100 Grade 1 qualification | Confirms reliability for automotive under-hood deployment including thermal cycling, humidity, and vibration stress testing per automotive standards. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ADC signals and pack contactor control commands between low-voltage MCU and high-voltage battery stack. IC Role / Device Role / Timing Role: SI86SM40EC-IS1R provides four independent isolation channels: two for analog front-end SPI data (A1/B1, A2/B2) and two for digital contactor enable/disable (A3/B3, A4/B4). Use Value: 10 ns propagation delay ensures synchronized sampling of multi-cell voltages; 6000 VRMS rating supports >800 V battery systems with margin. |
Use Scenario: Transmitting PWM gate drive signals and fault feedback from inverter control unit to isolated gate drivers in 400 V/800 V EV power modules. IC Role / Device Role / Timing Role: SI86SM40EC-IS1R delivers precise timing-critical gate signals (A1/B1, A2/B2) and receives desaturation fault reports (A3/B3, A4/B4) across isolation barrier. Use Value: 3.5 ns pulse width distortion prevents shoot-through in half-bridge configurations; 150 Mbps rate accommodates high-resolution PWM carriers. |
| Onboard Charger (OBC) | Industrial Motor Drive |
|
Use Scenario: Isolating communication between AC/DC PFC controller and DC/DC LLC controller in bi-directional OBC topologies. IC Role / Device Role / Timing Role: SI86SM40EC-IS1R carries isolated UART/SPI commands (A1/B1, A2/B2) and status flags (A3/B3, A4/B4) between dual-controller domains. Use Value: Sleep mode (SMb) reduces standby power during vehicle charging pause states; AEC-Q100 ensures longevity in automotive thermal cycles. |
Use Scenario: Interfacing PLC I/O modules with isolated fieldbus transceivers and servo amplifier gate drivers in factory automation systems. IC Role / Device Role / Timing Role: SI86SM40EC-IS1R routes encoder quadrature signals (A1/B1, A2/B2) and enable/fault lines (A3/B3, A4/B4) across safety isolation boundary. Use Value: –40 to 125 °C operation supports enclosure-less mounting near motors; 100 kV/µs CMTI rejects EMI from adjacent VFDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2400ARWZ | 4-channel, 25 Mbps, 2500 VRMS, SOIC-16, no sleep mode, 15 ns propagation delay | Limited to lower-speed industrial I/O; lacks AEC-Q100 and 6000 VRMS for automotive traction systems | Choose ADUM2400ARWZ only for cost-sensitive non-automotive applications where 25 Mbps suffices and sleep mode is unnecessary. |
| ISO6741QDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, no sleep mode, 16 ns propagation delay, automotive AEC-Q100 Grade 1 | Lower speed and isolation rating than SI86SM40EC-IS1R; no SMb pin for ultra-low-power monitoring states | ISO6741QDWR fits auxiliary control paths in EV systems but cannot replace SI86SM40EC-IS1R in primary gate drive or high-speed BMS monitoring roles. |
Compared with ADUM2400ARWZ and ISO6741QDWR, SI86SM40EC-IS1R delivers 6× higher data rate, 20% lower propagation delay, 20% higher isolation rating, and unique sleep-mode power optimization-making it the only qualified option for timing-critical, high-voltage, low-quiescent automotive subsystems.
Availability
SI86SM40EC-IS1R is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and onboard chargers requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI86SM40EC-IS1R 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 for wireless, automotive, and industrial markets.
The Si86Sxx family-including SI86SM40EC-IS1R-is designed specifically for high-reliability, high-speed galvanic isolation in automotive electrification and industrial power conversion, emphasizing AEC-Q100 compliance, reinforced safety certification, and RF-based noise immunity.
FAQ
What is the isolation voltage rating of SI86SM40EC-IS1R and which safety standards does it meet?
SI86SM40EC-IS1R provides 6000 VRMS reinforced isolation per UL 1577 for 1 minute, and is certified to VDE 60747-17, CSA 62368-1/60601-1, and CQC GB4943.1. These ratings validate its use in high-voltage automotive and industrial systems where functional safety and creepage/clearance compliance are mandatory. The wide-body SOIC-16 package enables this rating physically and electrically.
Does SI86SM40EC-IS1R support fail-safe operation, and how is it configured?
Yes, SI86SM40EC-IS1R supports configurable fail-safe output behavior. Its "EC" suffix indicates default-low output during side-A power loss while side-B remains powered. This is implemented via internal logic that pulls B1–B4 low when VDD1 falls below UVLO– (1.98 V), ensuring safe shutdown of downstream gate drivers or contactors without external circuitry.
How does the SMb pin function in SI86SM40EC-IS1R, and what is its power impact?
The SMb pin in SI86SM40EC-IS1R is an active-low sleep mode control input. When driven low, it reduces total device current to 750 µA per side (1.5 mA total), while retaining one always-on channel to detect SMb transition back to high. This enables ultra-low-power monitoring in battery management systems without sacrificing wake-up responsiveness or timing performance.
What is the maximum data rate and propagation delay specification for SI86SM40EC-IS1R?
SI86SM40EC-IS1R supports up to 150 Mbps data rate with a typical propagation delay of 10 ns and maximum of 13 ns over temperature and voltage. This enables precise timing in high-frequency applications such as isolated SPI for ADCs, encoder interfaces, and gate driver command transmission in 800 V EV inverters.
Is SI86SM40EC-IS1R qualified for automotive applications, and what does its AEC-Q100 Grade 1 rating mean?
Yes, SI86SM40EC-IS1R is AEC-Q100 Grade 1 qualified, meaning it is tested and certified for operation from –40 to 125 °C ambient temperature with full reliability screening including HTOL, TC, UHAST, and ESD. This qualifies it for under-hood automotive use in battery management systems, onboard chargers, and traction inverters where environmental robustness is critical.
SI86SM40EC-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SI86SM40EC-IS1R FAQ
1.How can I place an order for SI86SM40EC-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86SM40EC-IS1R 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 SI86SM40EC-IS1R reliable?
The price and inventory of SI86SM40EC-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86SM40EC-IS1R is usually 5 days.
3.What payment methods are accepted for SI86SM40EC-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86SM40EC-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86SM40EC-IS1R?
SI86SM40EC-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86SM40EC-IS1R 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 SI86SM40EC-IS1R?
For technical support, including SI86SM40EC-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86SM40EC-IS1R requirements.
6.How does Aetrix verify that SI86SM40EC-IS1R is sourced from the original manufacturer or authorized distributors?
All SI86SM40EC-IS1R 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 SI86SM40EC-IS1R meets industry standards.
7.What is the process for return or replacement of SI86SM40EC-IS1R?
All SI86SM40EC-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86SM40EC-IS1R, 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 SI86SM40EC-IS1R part is unused and in its original packaging.
Return procedure for SI86SM40EC-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86SM40EC-IS1R Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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