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Skyworks Solutions Inc. SI8640ED-AS2R
- Part No.:
- SI8640ED-AS2R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8640ED-AS2R.pdf
- Description:
- AUTOMOTIVE 5 KV 4-CHANNEL DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
SI8640ED-AS2R from Skyworks is a quad-channel, unidirectional digital isolator with 4-input/0-output channel configuration, 5 kVRMS reinforced isolation rating, and selectable high-fail-safe default output state. It operates from 2.5–5.5 V supplies, supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and is qualified to AEC-Q100 for automotive use in battery management systems and on-board chargers.
For engineers reviewing the SI8640ED-AS2R datasheet, SI8640ED-AS2R pinout, SI8640ED-AS2R application, or SI8640ED-AS2R equivalent, key selection criteria include its wide-body SOIC-16 package with 8 mm creepage, fail-safe high-default logic behavior during input-side power loss, and ultra-low power consumption (3.5 mA per channel at 100 Mbps @ 2.5 V).
Technical Context
The SI8640ED-AS2R implements RF-based on/off keying across a silicon-die isolation barrier-eliminating startup initialization and providing inherent noise immunity without optical components. Its architecture delivers precise timing with ≤2.5 ns channel-to-channel skew and ≤4.5 ns propagation delay skew across temperature (–40 to 125 °C).
All four channels reside on the VDD1 side as inputs and drive outputs on the isolated VDD2 side. A single enable input (EN) on the output side controls tri-state operation of all four outputs simultaneously, supporting system-level power sequencing and bus contention management in isolated communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation (UL, VDE 0884-10, CQC certified); enables safe interface between 400 V battery domains and low-voltage MCU control logic. |
| Data Rate | DC to 150 Mbps; supports high-speed SPI, RS-485, and CAN FD signal isolation without timing bottlenecks. |
| Propagation Delay | 5–13 ns (typ. 8 ns); ensures deterministic latency for real-time motor control feedback loops and ADC sampling synchronization. |
| Supply Voltage Range | 2.5–5.5 V on both sides; allows direct interfacing with 3.3 V MCUs and 5 V analog front-ends without level-shifting. |
| Fail-Safe Default | High-output state when VDD1 is unpowered; prevents undefined states in safety-critical BMS fault detection paths. |
| Power Consumption | 3.5 mA per channel at 100 Mbps @ 2.5 V; reduces thermal load in compact automotive modules with multiple isolation channels. |
| CMTI | Min. 35 kV/µs (typ. 60 kV/µs); maintains signal integrity in high-di/dt environments like traction inverter gate drivers. |
Pinout & Package
SI8640ED-AS2R uses a 16-pin wide-body SOIC package (–AS2 suffix denotes IS2 variant with tie-bar-free construction for 8 mm creepage), RoHS-compliant, JEDEC MS-013 compliant, with 1.27 mm pitch and standard land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Provides power to input buffers and RF transmitter; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 | Input-side ground | Reference for all input signals and VDD1; requires low-inductance connection to minimize common-mode noise coupling. |
| IN1–IN4 | Input channels | CMOS-compatible Schmitt-trigger inputs with 0.44 V hysteresis; tolerate slow edges and reject EMI in noisy automotive harnesses. |
| VDD2 | Output-side supply | Power for RF receiver and output drivers; independent of VDD1 for true galvanic isolation. |
| GND2 | Output-side ground | Reference for output signals and VDD2; physically separated from GND1 by ≥8 mm creepage. |
| OUT1–OUT4 | Isolated output channels | 50 Ω nominal output impedance; designed for controlled-impedance PCB traces to preserve signal integrity at 150 Mbps. |
| EN | Enable control | Active-high signal on VDD2 side; drives all outputs to high-impedance when low, enabling shared-bus architectures. |
| NC | No-connect | Pins 1, 9, 16 are internally unconnected; may be left floating, tied to VDD2, or grounded per layout requirements. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift issues of optocouplers; guarantees 60-year lifetime at rated working voltage. |
| Selectably high-fail-safe mode | Ensures OUT1–OUT4 default to logic high during VDD1 brownout-critical for asserting fault flags in BMS shutdown sequences. |
| Tri-state outputs via EN | Single-pin control enables hot-swap capability and multi-drop bus arbitration without external logic or MOSFET switches. |
| Ultra-low power at 2.5 V | 1.5 mA per channel at 1 Mbps enables always-on monitoring in low-power wake-up domains of vehicle ECUs. |
| AEC-Q100 Grade 0 qualification | Validated for operation from –40 to +125 °C ambient; meets zero-defect automotive manufacturing flow requirements. |
Applications
| Battery Management System (BMS) | On-Board Charger (OBC) |
|---|---|
|
Use Scenario: Isolating cell voltage monitor ICs and pack current sensors from the main MCU in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting analog monitor data and fault status across 400–800 V DC domains. 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: Isolating digital control signals between the AC/DC stage controller and DC/DC stage controller in bidirectional OBCs. IC Role / Device Role / Timing Role: High-speed, low-skew isolator synchronizing PWM commands and status feedback across isolated power domains. Use Value: 150 Mbps data rate and ≤2.5 ns channel-channel skew maintain tight timing alignment for dual-phase interleaved control loops. |
| Traction Inverter Control | Automotive Diagnostic Interface |
|
Use Scenario: Transmitting IGBT gate driver enable/disable signals and DESAT fault reports from isolated gate driver ICs to MCU. IC Role / Device Role / Timing Role: Fail-safe high-default isolator ensuring gate drivers remain disabled during MCU reset or supply interruption. Use Value: High CMTI (60 kV/µs typ.) prevents false triggering during high-di/dt switching transients in 1200 V SiC inverters. |
Use Scenario: Isolating UDS (Unified Diagnostic Services) communication lines between vehicle diagnostic port and domain controllers. IC Role / Device Role / Timing Role: Low-power, Schmitt-trigger isolator conditioning UART signals while blocking ground-loop noise in service bay environments. Use Value: 2.5–5.5 V dual-supply flexibility allows direct integration with 3.3 V diagnostic ECUs and 5 V legacy tools without level shifters. |
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 |
|---|---|---|---|
| SI8640ED-AS | Same electrical specs and fail-safe high default, but uses standard wide-body SOIC (-IS) instead of tie-bar-free -IS2 package; 7.5 mm creepage vs. 8 mm. | Suitable for non-automotive industrial designs where 8 mm creepage is not mandated by end-equipment safety standards. | Select SI8640ED-AS2R when 8 mm creepage is required for reinforced insulation in automotive HV systems per ISO 6469-3. |
| ADUM140E0BRWZ | 4-channel, 5 kVRMS, fail-safe high, but only 100 Mbps max data rate and higher 12 ns typical propagation delay; CMOS-based iCoupler® technology. | Used in legacy industrial PLCs where lower speed and higher latency are acceptable; lacks AEC-Q100 qualification. | Choose SI8640ED-AS2R over ADUM140E0BRWZ when automotive qualification, 150 Mbps throughput, or sub-10 ns timing is mandatory. |
Compared with SI8640ED-AS and ADUM140E0BRWZ, SI8640ED-AS2R uniquely combines AEC-Q100 Grade 0, 8 mm creepage, 150 Mbps, and fail-safe high behavior in a single automotive-qualified device-enabling simplified BOMs and reduced validation effort in next-gen EV power electronics.
Availability
SI8640ED-AS2R is available at Aetrix Electronics and suitable for battery management systems, on-board chargers, traction inverters, and automotive diagnostic interfaces requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for SI8640ED-AS2R 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 Si864x family was engineered specifically for high-reliability automotive and industrial isolation needs-delivering robust RF-based digital isolation with AEC-Q100 qualification, reinforced safety ratings, and ultra-low power across extended temperature ranges.
FAQ
What is the isolation rating and certification status of the SI8640ED-AS2R?
The SI8640ED-AS2R 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 functional safety applications in automotive battery systems where reinforced insulation is mandated by ISO 6469-3.
Does the SI8640ED-AS2R require startup initialization or configuration?
No-the SI8640ED-AS2R requires no startup initialization or configuration. Its RF-based architecture begins transmitting valid data within 40 µs of power application (tSU), with outputs transitioning to their fail-safe high state if VDD1 is absent. This eliminates boot firmware dependencies and simplifies system reset handling.
How does the fail-safe high default behavior of the SI8640ED-AS2R function during power loss?
When VDD1 is unpowered while VDD2 remains active, the SI8640ED-AS2R drives all four outputs (OUT1–OUT4) to logic high-ensuring defined signaling in safety-critical paths such as BMS fault latches or inverter disable commands. This behavior is hard-coded by the "ED" ordering code and does not require external pull-ups.
What package variant does the "-AS2R" suffix indicate for the SI8640ED-AS2R?
The "-AS2" suffix denotes the tie-bar-free wide-body SOIC package (IS2 variant) with 8 mm creepage distance, while "R" indicates tape-and-reel packaging. This variant meets reinforced insulation requirements for automotive high-voltage systems where enhanced creepage is mandated beyond standard wide-body SOIC (-AS or -IS) dimensions.
Can the SI8640ED-AS2R operate with mismatched supply voltages on VDD1 and VDD2?
Yes-the SI8640ED-AS2R supports independent 2.5–5.5 V supplies on VDD1 and VDD2. This enables direct interfacing between 3.3 V microcontrollers (VDD1) and 5 V analog subsystems (VDD2), or between different voltage domains in multi-rail automotive ECUs without external level shifters.
SI8640ED-AS2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 35kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- 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-AS2R FAQ
1.How can I place an order for SI8640ED-AS2R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640ED-AS2R 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-AS2R reliable?
The price and inventory of SI8640ED-AS2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640ED-AS2R is usually 5 days.
3.What payment methods are accepted for SI8640ED-AS2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640ED-AS2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640ED-AS2R?
SI8640ED-AS2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640ED-AS2R 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-AS2R?
For technical support, including SI8640ED-AS2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640ED-AS2R requirements.
6.How does Aetrix verify that SI8640ED-AS2R is sourced from the original manufacturer or authorized distributors?
All SI8640ED-AS2R 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-AS2R meets industry standards.
7.What is the process for return or replacement of SI8640ED-AS2R?
All SI8640ED-AS2R units undergo pre-shipment inspection (PSI). If there is an issue with SI8640ED-AS2R, 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-AS2R part is unused and in its original packaging.
Return procedure for SI8640ED-AS2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640ED-AS2R Tags
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ISO1212DBQR
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SI8710AC-B-ISR
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