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Skyworks Solutions Inc. SI8640ED-AS
- Part No.:
- SI8640ED-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8640ED-AS.pdf
- Description:
- ISOLATION
- Quantity:
- Payment:
- Shipping:
Inventory:4,303
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Product details
Overview
SI8640ED-AS from Skyworks is a quad-channel, unidirectional digital isolator with 4-input/0-output channel configuration, 5 kVRMS reinforced isolation rating, and selectable high-default fail-safe mode. It operates from 2.5–5.5 V, supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and targets isolated communication in battery management systems and industrial inverters.
For engineers reviewing the SI8640ED-AS datasheet, SI8640ED-AS pinout, SI8640ED-AS application, or SI8640ED-AS equivalent, this page delivers verified electrical specs, SOIC-16 wide-body package details, fail-safe output behavior during power loss, and automotive-grade AEC-Q100 qualification for high-reliability embedded isolation design.
Technical Context
The SI8640ED-AS implements RF-based on/off keying across a semiconductor isolation barrier-eliminating startup initialization and providing robust noise immunity without optical degradation. Its four isolated channels are all input-side referenced (VDD1), with outputs driven on the isolated side (VDD2) under single enable control (EN).
It features Schmitt-trigger inputs for >0.4 V hysteresis, 50 Ω nominal output impedance, and undervoltage lockout (UVLO) on both sides with 70 mV typical hysteresis. The device maintains stable timing-1.5 ns pulse width distortion and 0.5 ns channel-channel skew-across –40 to 125 °C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation (UL, VDE 0884-10, CQC certified); enables use in mains-connected industrial and EV traction systems. |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and CAN FD signal isolation without bottlenecking host controller throughput. |
| Propagation Delay | 8 ns typical - ensures tight timing alignment in real-time motor control loops and isolated ADC sampling interfaces. |
| Supply Voltage Range | 2.5–5.5 V on both sides - interoperates with 3.3 V microcontrollers and 5 V analog subsystems without level-shifting. |
| Fail-Safe Default | High-output state during VDD1 loss - prevents undefined logic states in safety-critical BMS fault signaling paths. |
| Power Consumption | 5.5 mA per channel at 100 Mbps (5 V) - reduces thermal load in densely packed isolated gate driver boards. |
| Common-Mode Immunity | 60 kV/µs CMTI - sustains reliable operation amid fast-switching transients in SiC/GaN inverter half-bridges. |
Pinout & Package
SI8640ED-AS uses a RoHS-compliant 16-pin wide-body SOIC package (WB SOIC-16, -IS suffix), with 8 mm creepage distance and reinforced insulation suitable for 5 kVRMS working voltage applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for input logic, Schmitt triggers, and RF transmitter; must be ≥2.5 V for valid operation. |
| GND1 | Input-side ground | Reference for all input signals and VDD1; requires local 0.1 µF bypass capacitor. |
| IN1–IN4 | Digital input channels | 4 unidirectional CMOS inputs with Schmitt-trigger thresholds (VT+ = 1.67 V typ); accept 2.5–5.5 V logic levels. |
| VDD2 | Output-side supply | Power for RF receiver, output drivers, and EN logic; independent of VDD1 for true galvanic isolation. |
| GND2 | Output-side ground | Reference for outputs and EN; physically separated from GND1 by isolation barrier. |
| EN | Enable control input | Active-high signal on VDD2 side; drives all four outputs into high-impedance when low (tri-state mode). |
| OUT1–OUT4 | Isolated digital outputs | CMOS outputs with 50 Ω impedance; default high during VDD1 loss (fail-safe mode); drive 4 mA sink/source. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging and temperature drift; enables DC–150 Mbps operation without retraining or calibration. |
| Selectably high-fail-safe output | Guarantees known logic state (high) at OUT1–OUT4 when VDD1 fails-critical for BMS fault flag latching. |
| AEC-Q100 qualified | Validated for automotive use (Grade 1: –40 to 125 °C); includes PPAP documentation and IMDS/CAMDS compliance. |
| Low-power active operation | 1.6 mA/channel at 1 Mbps (5 V) - extends runtime in battery-powered isolated sensor nodes and portable test equipment. |
| Reinforced VDE 0884-10 certification | Meets IEC 62368-1 and IEC 60601-1 requirements for medical and industrial end-equipment safety certification. |
Applications
| Battery Management System (BMS) | Industrial Motor Drive |
|---|---|
Use Scenario: Isolating cell voltage monitor ICs and pack-level MCU in high-voltage EV battery stacks. IC Role / Device Role / Timing Role: Quad-channel isolator conveying 4 analog monitor status bits across 400–800 V potential difference. Use Value: 5 kVRMS reinforced isolation and AEC-Q100 qualification ensure functional safety compliance (ISO 26262 ASIL-C) and long-term reliability under thermal cycling. |
Use Scenario: Transmitting PWM gate signals from controller to isolated IGBT/SiC half-bridge drivers in servo inverters. IC Role / Device Role / Timing Role: Unidirectional isolator delivering synchronized ON/OFF commands with <10 ns propagation delay and 0.5 ns skew. Use Value: 60 kV/µs CMTI prevents false triggering during 100+ V/ns switching transients; 150 Mbps headroom supports advanced modulation schemes. |
| Isolated Power Supply Feedback | Medical Isolated Data Acquisition |
Use Scenario: Providing isolated feedback from secondary-side voltage/current sensors to primary-side PWM controller in SMPS. IC Role / Device Role / Timing Role: Fail-safe high-default isolator ensuring controller enters safe shutdown if secondary-side power fails. Use Value: High-default output eliminates need for external pull-ups; 2.5–5.5 V dual supply accommodates diverse controller and sensor rail voltages. |
Use Scenario: Isolating ECG/EEG front-end ADC serial interface (SPI) from patient-connected analog circuitry. IC Role / Device Role / Timing Role: Quad-channel isolator separating digital data lines while maintaining precise sample timing integrity. Use Value: Reinforced VDE 0884-10 and IEC 60601-1 certification meet medical safety standards; sub-10 ns skew preserves multi-channel phase coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402ARWZ | 4-channel, 25 kV/µs CMTI, 25 Mbps max rate, 2.7–5.5 V supply, 3.75 kVRMS basic isolation | Limited to lower-speed industrial PLC I/O; lacks reinforced certification for medical/automotive end-equipment | Choose for cost-sensitive, non-safety-critical 25 Mbps isolation where UL/VDE reinforcement is not required. |
| ISO6741QDWR | 4-channel, 50 kV/µs CMTI, 50 Mbps max rate, 2.25–5.5 V supply, 5 kVRMS reinforced isolation | Lower data rate limits use in high-bandwidth SPI or fast serial links; no AEC-Q100 qualification | Choose for TI-ecosystem designs needing 5 kVRMS reinforcement but not requiring 150 Mbps or automotive qualification. |
Compared with ADUM2402ARWZ and ISO6741QDWR, SI8640ED-AS delivers 3× higher data rate, 20% better CMTI, and full automotive qualification-making it optimal for next-generation BMS, traction inverters, and certified medical devices demanding speed, noise immunity, and safety compliance.
Availability
SI8640ED-AS is available at Aetrix Electronics and suitable for battery management systems, industrial motor drives, and isolated power supply feedback requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for SI8640ED-AS 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 Si864x family was designed specifically for high-reliability galvanic isolation in automotive, industrial, and medical systems-emphasizing low power, high speed, and safety-certified reinforced insulation.
FAQ
What is the isolation rating and safety certification status of SI8640ED-AS?
SI8640ED-AS provides 5 kVRMS reinforced isolation and is certified to UL 1577, VDE 0884-10 (reinforced), CSA 5A, CQC GB4943.1, and IEC 62368-1. These certifications validate its suitability for high-voltage industrial and automotive applications where reinforced insulation is mandated.
Does SI8640ED-AS support fail-safe operation, and how is it configured?
Yes, SI8640ED-AS has a factory-configured high-default fail-safe mode. When VDD1 is unpowered but VDD2 remains active, all four outputs (OUT1–OUT4) assert logic high. This behavior is fixed per ordering code and cannot be changed in-circuit.
What is the maximum data rate supported by SI8640ED-AS, and what timing performance does it deliver?
SI8640ED-AS supports up to 150 Mbps data rate. Its timing performance includes 8 ns typical propagation delay, 1.5 ns pulse width distortion, 0.5 ns channel-channel skew, and 2 ns propagation delay skew-enabling precise synchronization in high-speed digital interfaces.
Is SI8640ED-AS qualified for automotive applications, and what does that entail?
Yes, SI8640ED-AS is AEC-Q100 qualified (Grade 1, –40 to 125 °C) and supported with AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and zero-defect manufacturing controls-ensuring robustness for on-board chargers, battery management systems, and traction inverters.
How does the enable (EN) pin function on SI8640ED-AS, and what is its electrical behavior?
The EN pin on SI8640ED-AS is an active-high control on the VDD2 side. When EN = low, all four outputs enter high-impedance state. When EN = high or floating (internally pulled up), outputs follow their respective inputs. EN response time is 6 ns typical from enable to valid output.
SI8640ED-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 60kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 14ns, 14ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 2.375V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8640ED-AS FAQ
1.How can I place an order for SI8640ED-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640ED-AS 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 SI8640ED-AS reliable?
The price and inventory of SI8640ED-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640ED-AS is usually 5 days.
3.What payment methods are accepted for SI8640ED-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640ED-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640ED-AS?
SI8640ED-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640ED-AS 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 SI8640ED-AS?
For technical support, including SI8640ED-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640ED-AS requirements.
6.How does Aetrix verify that SI8640ED-AS is sourced from the original manufacturer or authorized distributors?
All SI8640ED-AS 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 SI8640ED-AS meets industry standards.
7.What is the process for return or replacement of SI8640ED-AS?
All SI8640ED-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8640ED-AS, 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 SI8640ED-AS part is unused and in its original packaging.
Return procedure for SI8640ED-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640ED-AS 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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