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Skyworks Solutions Inc. SI86S640FC-AS1R
- Part No.:
- SI86S640FC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI86S640FC-AS1R.pdf
- Description:
- 3.75 KVRMS ISOLATOR, 4 UNIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
SI86S640FC-AS1R from Skyworks Solutions is a 4-channel reinforced digital isolator with bidirectional signal isolation across an integrated semiconductor barrier. It delivers DC–150 Mbps data rate, 10 ns typical propagation delay, and 6000 VRMS isolation rating in a WB SOIC-16 package. Used in isolated ADC interfaces, motor control gate drivers, and onboard charger communication links.
For engineers reviewing the SI86S640FC-AS1R datasheet, SI86S640FC-AS1R pinout, SI86S640FC-AS1R application, or SI86S640FC-AS1R equivalent, key selection criteria include reinforced IEC 60747-17 certification, fail-safe default-low output option (denoted by 'F' in part number), AEC-Q100 qualification for automotive use, and compatibility with 2.25–5.5 V dual-supply operation.
Technical Context
The SI86S640FC-AS1R implements RF-based on/off keying modulation across its isolation barrier-eliminating startup initialization and enabling robust noise immunity up to 100 kV/µs CMTI. Its architecture supports independent UVLO monitoring per side (VDD1/VDD2) with RSTB reset thresholds at ~1.7 V and 0.3 ms start-up stabilization time.
All four channels are bidirectional with Schmitt-trigger + CMOS input thresholds, tri-state outputs controlled by EN1/EN2 pins, and selectable fail-safe mode (default low, per 'F' suffix). The device operates across –40 °C to +125 °C and integrates internal 50 Ω output impedance for controlled-impedance PCB routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, isolated UART, and real-time control loops without protocol translation. |
| Propagation delay | 10 ns typical - enables tight timing budgets in motor gate driver feedback paths and isolated ADC sampling clocks. |
| Isolation rating | 6000 VRMS (1 min) - meets reinforced insulation requirements for industrial inverters and EV battery management systems. |
| Supply voltage | 2.25–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Fail-safe mode | Default low output - ensures safe shutdown state during VDD1 loss in power stage control applications. |
| CMTI | ≥100 kV/µs - suppresses fast transients in high-dv/dt environments like SiC/GaN inverter switching nodes. |
| Operating temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions without derating. |
Pinout & Package
SI86S640FC-AS1R is housed in a wide-body SOIC-16 (WB SOIC-16) package with 8.3 mm creepage/clearance, supporting 6000 VRMS working voltage per UL 1577.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1, GND1 | Side A power supply | Provides isolated 2.25–5.5 V bias for channel inputs; requires 0.1 µF + 10 µF local bypass. |
| A1–A4 | Side A digital I/O | Bidirectional data lines referenced to VDD1/GND1; accept Schmitt-trigger + CMOS thresholds. |
| EN1 | Side A output enable | Active-high control: drives all A-side outputs into high-impedance when low. |
| VDD2, GND2 | Side B power supply | Independent 2.25–5.5 V bias for channel outputs; decoupled separately from VDD1. |
| B1–B4 | Side B digital I/O | Bidirectional mirrored signals referenced to VDD2/GND2; electrically isolated from Side A. |
| EN2 | Side B output enable | Active-high control: places all B-side outputs in high-Z state when low. |
Key Features
| Feature | Design Value |
|---|---|
| No-startup initialization | RF modulation architecture eliminates boot sequence - outputs follow inputs immediately after UVLO exit. |
| Reinforced safety rating | IEC 60747-17 certified - satisfies reinforced insulation requirements for medical (60601-1) and industrial (62368-1) end equipment. |
| Tri-state output control | Dual EN1/EN2 pins allow independent high-Z control of each side - essential for bus arbitration in isolated SPI/MCU interfaces. |
| Input deglitch filter | 36 ns pulse rejection - suppresses EMI-induced glitches on noisy motor control or power supply sense lines. |
| AEC-Q100 Grade 1 | Qualified for automotive applications including onboard chargers and traction inverters - validated across full temperature range. |
Applications
| Isolated ADC Interface | Motor Gate Driver Feedback |
|---|---|
Use Scenario: Isolating serial output of precision delta-sigma ADCs (e.g., ADS131M04) from MCU in high-noise motor drive cabinets. IC Role / Device Role / Timing Role: Bidirectional data isolator preserving SPI clock/data integrity across 150 Mbps link while blocking ground loop currents. Use Value: Enables 24-bit measurement fidelity in 1000 VDC bus environments without signal corruption from dv/dt-induced coupling. |
Use Scenario: Transmitting PWM dead-time and fault signals between isolated gate driver ICs (e.g., UCC5870-Q1) and MCU in SiC inverter stacks. IC Role / Device Role / Timing Role: Low-propagation-delay isolator ensuring <15 ns timing skew between upper/lower leg gate commands. Use Value: Prevents shoot-through by maintaining precise edge alignment across isolation barrier during 100+ kHz switching. |
| Onboard Charger CAN Gateway | Battery Management System Isolation |
Use Scenario: Isolating CAN FD communication between OBC controller and vehicle domain controller in 400–800 V EV charging systems. IC Role / Device Role / Timing Role: Signal-level isolator for CAN_H/CAN_L differential pairs - preserves bit timing and common-mode transient immunity. Use Value: Maintains 2 Mbps CAN FD throughput with >100 kV/µs CMTI margin against charger switching noise. |
Use Scenario: Isolating cell voltage monitor IC (e.g., BQ79616) daisy-chain communication from main BMS MCU in multi-module packs. IC Role / Device Role / Timing Role: Four-channel isolator handling bidirectional daisy-chain clock, data, and sync signals across module boundaries. Use Value: Supports 100+ cell monitoring with deterministic latency and failsafe default-low behavior during partial power loss. |
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, 2500 VRMS, SOIC-16, no AEC-Q100 qualification | Lacks reinforced 6000 VRMS rating and automotive qualification - limited to non-safety-critical industrial use | Select when cost sensitivity outweighs 6000 VRMS and AEC-Q100 requirements |
| ISO6741FDWR | 4-channel, 50 Mbps, 5000 VRMS, SOIC-16, AEC-Q100 Grade 1 | Lower data rate and isolation rating - insufficient for 150 Mbps SPI or 6000 VRMS system-level certification | Choose only if design operates below 50 Mbps and accepts 5000 VRMS margin |
Compared with ADUM4402BRWZ and ISO6741FDWR, SI86S640FC-AS1R uniquely combines 150 Mbps speed, 6000 VRMS reinforced isolation, and AEC-Q100 Grade 1 in one device-enabling single-component compliance for high-voltage automotive and industrial safety standards without performance trade-offs.
Availability
SI86S640FC-AS1R is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and isolated motor control requiring stable component supply across automotive production lifecycles.
Supply support for SI86S640FC-AS1R 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.
The Si86S6xx family was engineered for high-reliability isolation in automotive traction systems and industrial power conversion-delivering RF-based performance with reinforced safety certification and extended temperature operation.
FAQ
What does the 'F' in SI86S640FC-AS1R indicate?
The 'F' suffix denotes the fail-safe default-low output configuration. When VDD1 is unpowered but VDD2 remains active, all B-side outputs of SI86S640FC-AS1R drive logic low-critical for safe shutdown in gate driver or power supply enable circuits. This behavior is factory-set and not user-configurable.
Does SI86S640FC-AS1R require external components for basic operation?
Yes-SI86S640FC-AS1R requires two bypass capacitors per side: 0.1 µF ceramic and 10 µF bulk capacitor placed adjacent to VDD1/GND1 and VDD2/GND2 pins. No pull-ups, level shifters, or termination resistors are mandatory, though 50 Ω series resistors may be added for extreme EMI environments.
How does SI86S640FC-AS1R handle power sequencing between VDD1 and VDD2?
SI86S640FC-AS1R features independent UVLO and reset monitors on each side. If VDD1 powers up before VDD2, A-side inputs are ignored until VDD2 exits UVLO (~2.1 V); outputs remain in fail-safe state. Full bidirectional operation begins only after both supplies stabilize above 2.25 V.
Can SI86S640FC-AS1R replace optocouplers in existing designs?
Yes-SI86S640FC-AS1R offers pin-compatible drop-in replacement for 4-channel optocouplers (e.g., HCPL-0723) in SOIC-16 footprints. It improves propagation delay consistency (10 ns vs. ±100 ns), eliminates LED aging, and supports higher data rates without external biasing or speed-up capacitors.
Is SI86S640FC-AS1R compatible with 1.8 V logic interfaces?
No-SI86S640FC-AS1R requires minimum 2.25 V on both VDD1 and VDD2. It does not support 1.8 V I/O. For 1.8 V systems, level-shifting buffers must be used on either side, or consider Skyworks' Si862x family which supports 1.71–5.5 V operation.
SI86S640FC-AS1R 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:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 150kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 42ns, 42ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI86S640FC-AS1R FAQ
1.How can I place an order for SI86S640FC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI86S640FC-AS1R 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 SI86S640FC-AS1R reliable?
The price and inventory of SI86S640FC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI86S640FC-AS1R is usually 5 days.
3.What payment methods are accepted for SI86S640FC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI86S640FC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI86S640FC-AS1R?
SI86S640FC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI86S640FC-AS1R 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 SI86S640FC-AS1R?
For technical support, including SI86S640FC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI86S640FC-AS1R requirements.
6.How does Aetrix verify that SI86S640FC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI86S640FC-AS1R 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 SI86S640FC-AS1R meets industry standards.
7.What is the process for return or replacement of SI86S640FC-AS1R?
All SI86S640FC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI86S640FC-AS1R, 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 SI86S640FC-AS1R part is unused and in its original packaging.
Return procedure for SI86S640FC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI86S640FC-AS1R 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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