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Skyworks Solutions Inc. SI86S631BC-IS1
- Part No.:
- SI86S631BC-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S631BC-IS1.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 3 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
SI86S631BC-IS1 from Skyworks Solutions is a 3-channel, reinforced digital isolator with 6000 VRMS isolation rating, 150 Mbps data rate, and AEC-Q100 qualification for automotive use. It features Schmitt-trigger CMOS inputs, tri-state outputs with enable control, and selectable fail-safe default-high or default-low output mode during power loss. It is deployed in battery management systems and traction inverters where high noise immunity and precise timing are critical.
For engineers reviewing the SI86S631BC-IS1 datasheet, SI86S631BC-IS1 pinout, SI86S631BC-IS1 application, or SI86S631BC-IS1 equivalent, key selection criteria include its 10 ns typical propagation delay, 3.5 ns pulse width distortion, 100 kV/µs CMTI, –40 to 125 °C operating range, and WB SOIC-16 package with reinforced IEC 60747-17 insulation.
Technical Context
The SI86S631BC-IS1 implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and enabling robust operation without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) and reset circuitry per side (VDD1/VDD2), with RSTB– threshold at ~1.7 V and UVLO– at 1.98 V.
It provides three unidirectional isolated channels (A1→B1, A2→B2, A3→B3), side-specific enable pins (EN1, EN2), and failsafe logic that holds outputs high or low when input supply is unpowered but output supply remains active-configurable via ordering option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed serial interfaces including isolated SPI clock domains. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements for 600 VAC working voltage systems. |
| Propagation delay | 10 ns typical - enables tight timing budgets in motor control gate drivers and ADC sampling clocks. |
| Pulse width distortion | 3.5 ns typical - preserves duty cycle integrity for PWM and clock forwarding applications. |
| CMTI | ≥100 kV/µs - ensures reliable operation in high-dV/dt environments like traction inverters and SMPS. |
| Supply voltage | 2.25 to 5.5 V - interoperable with 3.3 V and 5 V logic families without level-shifting. |
| Operating temperature | –40 to 125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
SI86S631BC-IS1 is housed in a wide-body SOIC-16 (WB SOIC-16) package with creepage/clearance optimized for 6000 VRMS reinforced insulation. Pin 1 is marked with a dot; pin 16 is VDD2, pin 1 is VDD1, and the isolation barrier lies between pins 1–8 (Side A) and pins 9–16 (Side B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides bias for transmitter circuits on input side; requires 0.1 µF + 10 µF bypassing. |
| A1–A3 | Side A digital inputs | CMOS/Schmitt-trigger inputs accepting 2.25–5.5 V logic; tolerate ±0.5 V beyond rails. |
| EN1 | Side A output enable | Active-high control: drives B1–B3 outputs into high-impedance state when low. |
| VDD2, GND2 | Side B power supply | Independent bias for receiver circuits; enables galvanic separation of power domains. |
| B1–B3 | Side B digital outputs | 50 Ω nominal output impedance; compatible with controlled-impedance PCB routing. |
| EN2 | Side B output enable | Active-high control: places A1–A3 outputs in high-Z when used in bidirectional configurations. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | RF modulation architecture eliminates boot-time delays and configuration sequences-output follows input immediately after UVLO exit. |
| Selectable fail-safe mode | Ordering option determines whether outputs default to logic high or low during VDD1 loss while VDD2 remains powered-critical for safe shutdown in BMS. |
| Tri-state outputs with enable | EN1/EN2 pins allow dynamic bus sharing across multiple isolated peripherals without external logic or contention risk. |
| High electromagnetic immunity | 100 kV/µs common-mode transient immunity prevents false triggering in noisy motor drive and inverter environments. |
| AEC-Q100 qualification | Qualified to Grade 0 (–40 to +150 °C junction) with automotive-specific manufacturing flow-ensures low defectivity for EV powertrain systems. |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
|
Use Scenario: Isolating cell voltage monitoring ICs and microcontroller ADC inputs in high-voltage battery packs up to 1000 VDC. IC Role / Device Role / Timing Role: Transmits precision analog front-end data across isolation barrier with <10 ns skew to preserve sampling coherence. Use Value: Enables accurate state-of-charge estimation by maintaining signal integrity despite >100 kV/µs transients during contactor switching. |
Use Scenario: Isolating gate driver control signals from MCU PWM outputs in 3-phase SiC inverter modules. IC Role / Device Role / Timing Role: Delivers synchronized, low-jitter gate enable/disable commands to high-side and low-side drivers. Use Value: Prevents shoot-through failure by guaranteeing matched propagation delay (<10 ns) and minimal pulse width distortion (3.5 ns). |
| Onboard Charger (OBC) | Industrial PLC I/O Module |
|
Use Scenario: Isolating communication between AC/DC controller and DC/DC stage in bi-directional OBCs for EVs. IC Role / Device Role / Timing Role: Transfers status, fault, and synchronization signals across primary-secondary boundary at up to 150 Mbps. Use Value: Supports fast fault response (<1 µs detection-to-action) required for UL 62368-1 compliance in high-power charging systems. |
Use Scenario: Providing channel-isolated digital inputs for 24 VDC field sensors in modular PLC backplanes. IC Role / Device Role / Timing Role: Converts unsynchronized 24 V sensor edges into clean 3.3 V logic levels with Schmitt-trigger hysteresis. Use Value: Eliminates need for discrete optocouplers and external pull-ups-reducing BOM count and board area by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3301ARWZ | 3-channel, 25 Mbps max, 2.5 kVRMS, SOIC-16, non-AEC-Q100 | Limited to industrial temp range (–40 to 105 °C); lacks automotive qualification and 6000 VRMS rating | Use where cost sensitivity outweighs automotive qualification and high-speed or high-isolation needs. |
| ISO6731FDWR | 3-channel, 50 Mbps max, 5000 VRMS, SOIC-16, AEC-Q100 Grade 1 | Lower data rate and isolation rating; no selectable fail-safe mode; only –40 to 125 °C (Grade 1) | Acceptable for less demanding automotive subsystems where 150 Mbps or 6000 VRMS is not required. |
Compared with ADUM3301ARWZ and ISO6731FDWR, SI86S631BC-IS1 delivers 3× higher data rate than the latter and full AEC-Q100 Grade 0 qualification with 6000 VRMS-making it uniquely suitable for safety-critical EV powertrain control loops requiring both speed and reinforced insulation.
Availability
SI86S631BC-IS1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, onboard chargers, and industrial PLC I/O modules requiring stable component supply across automotive and industrial design cycles.
Supply support for SI86S631BC-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, with leadership in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.
SI86S631BC-IS1 belongs to Skyworks' Si86S6xx family of high-speed digital isolators designed specifically for automotive-grade powertrain and charging systems requiring reinforced insulation, AEC-Q100 qualification, and sub-10 ns timing precision.
FAQ
What is the isolation rating and certification status of SI86S631BC-IS1?
SI86S631BC-IS1 provides 6000 VRMS isolation for 1 minute per UL 1577 and is certified to IEC 60747-17 (reinforced insulation). It also meets CSA 62368-1 and 60601-1, and CQC GB4943.1. These certifications are fully documented for end-system safety approvals in automotive and medical applications.
Does SI86S631BC-IS1 support fail-safe output behavior during power loss?
Yes, SI86S631BC-IS1 offers a factory-configured fail-safe mode: outputs default to either logic high or logic low when VDD1 is unpowered but VDD2 remains active. This behavior is defined at order time and is confirmed in the part number suffix-no external circuitry is needed to implement safe shutdown states.
What are the supply voltage and bypass capacitor requirements for SI86S631BC-IS1?
SI86S631BC-IS1 operates from 2.25 V to 5.5 V on both sides. Each supply (VDD1/GND1 and VDD2/GND2) requires a 0.1 µF ceramic capacitor placed adjacent to the pins plus a 10 µF bulk capacitor nearby. This dual-capacitor network suppresses high-frequency noise and sustains transient current demands during 150 Mbps data transitions.
How does the EN1 and EN2 pin functionality work in SI86S631BC-IS1?
In SI86S631BC-IS1, EN1 controls the output state of B1–B3 (Side B), and EN2 controls A1–A3 (Side A). When pulled low, each enable pin places its respective side's outputs into high-impedance state-enabling shared bus architectures and reducing standby power. Both pins are active-high and internally pulled down.
Is SI86S631BC-IS1 pin-compatible with other members of the Si86S6xx family?
SI86S631BC-IS1 shares the same WB SOIC-16 pinout as SI86S630BC-IS1 and SI86S632BC-IS1, differing only in channel directionality and fail-safe configuration. All three support identical layout footprints, bypassing, and PCB routing-allowing design reuse across functional variants without board revision.
SI86S631BC-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:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- 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
SI86S631BC-IS1 FAQ
1.How can I place an order for SI86S631BC-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S631BC-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 SI86S631BC-IS1 reliable?
The price and inventory of SI86S631BC-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S631BC-IS1 is usually 5 days.
3.What payment methods are accepted for SI86S631BC-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S631BC-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S631BC-IS1?
SI86S631BC-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S631BC-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 SI86S631BC-IS1?
For technical support, including SI86S631BC-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S631BC-IS1 requirements.
6.How does Aetrix verify that SI86S631BC-IS1 is sourced from the original manufacturer or authorized distributors?
All SI86S631BC-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 SI86S631BC-IS1 meets industry standards.
7.What is the process for return or replacement of SI86S631BC-IS1?
All SI86S631BC-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI86S631BC-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 SI86S631BC-IS1 part is unused and in its original packaging.
Return procedure for SI86S631BC-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S631BC-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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