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Skyworks Solutions Inc. SI8640BB-AS1R
- Part No.:
- SI8640BB-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8640BB-AS1R.pdf
- Description:
- AUTOMOTIVE 2.5 KV 4-CHANNEL DIGI
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
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Product details
Overview
SI8640BB-AS1R from Skyworks is a quad-channel, unidirectional digital isolator with 4 input channels on VDD1 side and 0 on VDD2 side, 2.5 kV RMS isolation rating, fail-safe default-low output state, and wide-body SOIC-16 package. It supports DC–150 Mbps data rates, achieves <10 ns propagation delay, and operates from 2.5–5.5 V supply across –40 to 125 °C - deployed in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8640BB-AS1R datasheet, SI8640BB-AS1R pinout, SI8640BB-AS1R application, or SI8640BB-AS1R equivalent, key selection criteria include its reinforced insulation certification (UL/CSA/VDE/CQC), tri-state enable control per output side, Schmitt-trigger noise immunity, and automotive-grade AEC-Q100 qualification for high-reliability power electronics.
Technical Context
The SI8640BB-AS1R implements RF-based on/off keying across a silicon-die isolation barrier, eliminating startup initialization and enabling deterministic timing without clock recovery circuitry. Its architecture delivers sub-10 ns propagation delay with ≤0.5 ns channel-to-channel skew and ≤2 ns propagation delay skew between units.
All four channels reside on the input side (VDD1), driving outputs on the isolated side (VDD2) with a single shared EN2 enable input. The device features internal undervoltage lockout (UVLO) on both sides, Schmitt-trigger inputs (VT+ = 1.67 V typ, VT– = 1.23 V typ), and failsafe logic that forces outputs low when VDD1 is unpowered but VDD2 remains active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | DC to 150 Mbps - supports high-speed SPI, RS-485, and PWM feedback loops without protocol translation. |
| Propagation Delay | 5.0–13.0 ns - enables tight timing closure in real-time motor control and isolated ADC sampling paths. |
| Isolation Rating | 2.5 kV RMS - certified to UL 1577, CSA 5A, VDE 0884-10 (basic), and CQC GB4943.1 for industrial safety compliance. |
| Supply Voltage | 2.5–5.5 V - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level-shifting. |
| Channel Configuration | 4-input / 0-output on VDD1 side - provides one-way signal isolation from controller to power stage, ideal for gate driver enable/disable and fault reporting. |
| Fail-Safe Mode | Default Low - ensures safe deactivation of downstream power devices during input-side power loss. |
| Common-Mode Immunity | ≥35 kV/µs (typ 60 kV/µs) - maintains signal integrity in noisy inverter switching environments with fast dV/dt transients. |
Pinout & Package
SI8640BB-AS1R uses a RoHS-compliant wide-body SOIC-16 package (WB SOIC-16, 10.3 mm body width, 8.5 mm creepage), rated for 2.5 kV RMS working voltage and qualified for reinforced insulation per IEC 62368-1 and IEC 60601-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry; UVLO threshold 2.24 V (typ); bypass capacitor required. |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by ≥8 mm creepage for safety compliance. |
| INA1–INA4 | Input data channels | Schmitt-trigger inputs with 0.44 V hysteresis; accept 2.0–5.5 V logic levels independent of VDD1. |
| EN2 | Output-side enable control | Active-high enable for all four B-side outputs; drives outputs to high-impedance when low. |
| VDD2 | Output-side power supply | Supplies receiver and output driver; supports independent 2.5–5.5 V operation from VDD1. |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1; defines safety barrier boundary. |
| OUTB1–OUTB4 | Isolated output channels | CMOS outputs with 50 Ω nominal impedance; drive loads up to 15 pF; default low during VDD1 power loss. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and temperature drift issues of optocouplers; enables 60-year lifetime at rated voltage. |
| Tri-state output control | Single EN2 pin disables all four outputs simultaneously into high-impedance, enabling bus sharing and hot-swap capability. |
| Fail-safe default-low mode | Guarantees safe shutdown of downstream power stages (e.g., IGBT gates) when controller supply fails. |
| Ultra-low power at 100 Mbps | 5.5 mA per channel at 5 V - reduces thermal load in densely packed inverters and EV battery packs. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40 to 125 °C ambient; supported with PPAP, IMDS, and CAMDS documentation. |
Applications
| Motor Control Systems | Isolated Power Supplies |
|---|---|
Use Scenario: Isolating PWM signals and fault flags between MCU and three-phase inverter gate drivers in servo drives and EV traction inverters. IC Role / Device Role / Timing Role: Unidirectional signal isolator transmitting gate enable/disable and overcurrent alerts across 2.5 kV barrier with <10 ns timing uncertainty. Use Value: Prevents ground loop currents and enables safe operation under 1500 V common-mode transients (≥35 kV/µs CMTI). | Use Scenario: Providing isolated feedback and control signals in 1–3 kW AC/DC and DC/DC converters with reinforced insulation requirements. IC Role / Device Role / Timing Role: Transmitting error amplifier output and soft-start commands across primary-secondary barrier while maintaining <5 ns pulse width distortion. Use Value: Enables compact transformerless designs compliant with IEC 62368-1 reinforced insulation and 8 mm creepage spacing. |
| Battery Management Systems | Industrial PLC I/O Modules |
Use Scenario: Isolating cell voltage monitoring and pack contactor control signals in high-voltage EV battery packs (up to 1000 V DC bus). IC Role / Device Role / Timing Role: Quad-channel isolator delivering precise timing-critical SOC/SOH telemetry and precharge sequencing commands. Use Value: Supports AEC-Q100 Grade 1 operation at 125 °C ambient and meets UL 1577 2.5 kV RMS withstand for functional safety compliance. | Use Scenario: Digitally isolating field-side digital inputs (limit switches, sensors) and output actuation signals in factory automation controllers. IC Role / Device Role / Timing Role: Replacing optocouplers in 24 V DC I/O modules with guaranteed 150 Mbps throughput and no LED degradation. Use Value: Reduces long-term maintenance cost via 60-year lifetime and eliminates calibration drift across –40 to 85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRWZ | Quad-channel, 2.5 kV RMS, 150 Mbps, default-low, SOIC-16 wide-body; uses iCoupler® capacitive isolation. | Same isolation rating and speed, but lacks AEC-Q100 qualification and automotive documentation support. | Select when automotive PPAP or IMDS compliance is not required and legacy Analog Devices design reuse is prioritized. |
| ISO6740QDWR | Quad-channel, 5 kV RMS, 50 Mbps, default-low, SOIC-16 wide-body; TI's capacitive isolator with reinforced VDE 0884-10 rating. | Higher isolation rating but lower speed; suitable where surge immunity >10 kV is mandatory but 150 Mbps is unnecessary. | Select for medical or industrial systems requiring 5 kV reinforced insulation and IEC 60601-1 compliance, not high-speed control loops. |
Compared with ADUM140D0BRWZ and ISO6740QDWR, SI8640BB-AS1R uniquely combines AEC-Q100 Grade 1 qualification, 150 Mbps speed, 2.5 kV RMS rating, and fail-safe default-low behavior in a single automotive-qualified SOIC-16 package - making it optimal for EV powertrain and high-reliability industrial motion control.
Availability
SI8640BB-AS1R is available at Aetrix Electronics and suitable for motor control systems, battery management systems, and isolated switch-mode supplies requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8640BB-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 Si864x family is designed for high-reliability signal isolation in automotive, industrial, and medical systems - emphasizing ultra-low power, precise timing, and safety-certified reinforced insulation.
FAQ
What is the isolation voltage rating and safety certification status of SI8640BB-AS1R?
SI8640BB-AS1R is rated for 2.5 kV RMS isolation and certified to UL 1577, CSA Component Notice 5A, VDE 0884-10 (basic insulation), and CQC GB4943.1. It meets IEC 62368-1 and IEC 60601-1 requirements for reinforced insulation in end equipment. These certifications are documented in Skyworks' official safety reports and apply directly to the SI8640BB-AS1R part number.
Does SI8640BB-AS1R support bidirectional communication?
No, SI8640BB-AS1R is a unidirectional isolator with all four input channels (INA1–INA4) on the VDD1 side and all four outputs (OUTB1–OUTB4) on the VDD2 side. It does not support reverse-direction signaling. For bidirectional isolation, consider SI8642BB-AS1R (2-channel each direction) or SI8641BB-AS1R (3:1 configuration), both in the same Si864x family.
What is the function of the EN2 pin on SI8640BB-AS1R?
The EN2 pin on SI8640BB-AS1R is an active-high enable input located on the output (VDD2) side. When EN2 is high, OUTB1–OUTB4 follow their respective INA1–INA4 inputs. When EN2 is low, all four outputs enter high-impedance state - enabling bus sharing, power sequencing, or safe shutdown without affecting input-side logic. This behavior is confirmed in Table 3.2 of the Si864x datasheet.
Is SI8640BB-AS1R qualified for automotive applications?
Yes, SI8640BB-AS1R is an automotive-grade part (denoted by "-A" suffix), qualified to AEC-Q100 Grade 1 (–40 to 125 °C), and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings. Its manufacturing flow follows full automotive process controls, and top marking includes an automotive manufacturing code (first character N–Z), as specified in the Si864x Ordering Guide.
What are the supply current requirements of SI8640BB-AS1R at 100 Mbps operation?
At 100 Mbps with 5 V supply, SI8640BB-AS1R draws 5.5 mA per channel on VDD2 (22.0 mA total for four channels) and 3.6 mA per channel on VDD1 (14.4 mA total), as specified in Table 4.2 of the Si864x datasheet. These values assume 15 pF load and 500 kHz square-wave input conditions - actual current scales linearly with data rate and load capacitance.
SI8640BB-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 2500Vrms
- 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
SI8640BB-AS1R FAQ
1.How can I place an order for SI8640BB-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640BB-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 SI8640BB-AS1R reliable?
The price and inventory of SI8640BB-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640BB-AS1R is usually 5 days.
3.What payment methods are accepted for SI8640BB-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640BB-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640BB-AS1R?
SI8640BB-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640BB-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 SI8640BB-AS1R?
For technical support, including SI8640BB-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640BB-AS1R requirements.
6.How does Aetrix verify that SI8640BB-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8640BB-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 SI8640BB-AS1R meets industry standards.
7.What is the process for return or replacement of SI8640BB-AS1R?
All SI8640BB-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8640BB-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 SI8640BB-AS1R part is unused and in its original packaging.
Return procedure for SI8640BB-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640BB-AS1R Tags
-
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
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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