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Skyworks Solutions Inc. SI8640BB-AS1
- Part No.:
- SI8640BB-AS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8640BB-AS1.pdf
- Description:
- AUTOMOTIVE 2.5 KV 4-CHANNEL DIGI
- Quantity:
- Payment:
- Shipping:
Inventory:1,579
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Product details
Overview
SI8640BB-AS1 from Skyworks is a quad-channel, unidirectional digital isolator with 4 input channels on VDD1 side and 0 on VDD2 side, providing reinforced 2.5 kVRMS isolation in a narrow-body SOIC-16 package. It supports up to 150 Mbps data rate, achieves <10 ns propagation delay, and operates across –40 to 125 °C with 2.5–5.5 V supply range. It is used in isolated motor control gate drivers and battery management system signal interfaces where low-power, high-noise-immunity isolation is required.
For engineers reviewing the SI8640BB-AS1 datasheet, SI8640BB-AS1 pinout, SI8640BB-AS1 application, or SI8640BB-AS1 equivalent, key selection criteria include its fail-safe low-default output state, Schmitt-trigger inputs for noise immunity, tri-state enable control, 50 kV/µs CMTI, and AEC-Q100 qualification for automotive-grade operation.
Technical Context
The SI8640BB-AS1 implements RF-based on/off keying across a silicon dioxide isolation barrier, eliminating startup initialization and enabling robust operation without optical degradation. Its architecture delivers precise timing with ≤2.5 ns channel-channel skew and ≤4.5 ns propagation delay skew across temperature and voltage.
All four channels are unidirectional (A→B), with a single EN pin on the output (VDD2) side controlling all outputs simultaneously. The device features undervoltage lockout (UVLO) on both sides, Schmitt-trigger inputs with 440 mV hysteresis, and failsafe default-low output behavior during input-side power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels & Direction | 4 unidirectional (input-only on VDD1 side, output-only on VDD2 side) |
| Max Data Rate | 150 Mbps - supports high-speed SPI, RS-485, and CAN FD interface isolation |
| Propagation Delay | 5–13 ns - enables tight-timing control loops in motor drives and power converters |
| Isolation Rating | 2.5 kVRMS reinforced - certified to UL 1577, VDE 0884-10 (basic), CSA 5A, CQC GB4943.1 |
| Supply Voltage | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems |
| CMTI | Min 35 kV/µs, typ 60 kV/µs - ensures reliable operation in noisy inverter and BMS environments |
| Fail-Safe Default | Low output when VDD1 is unpowered - prevents undefined states in safety-critical power control paths |
Pinout & Package
Narrow-body SOIC-16 (NB SOIC-16) package with 1.27 mm pitch, RoHS-compliant, JEDEC-standard reflow profile (260 °C peak). Creepage/clearance meets reinforced insulation requirements for 2.5 kVRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry for all 4 input channels; requires 0.1 µF bypass capacitor |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier |
| A1–A4 | Digital input signals (VDD1 side) | Schmitt-trigger inputs with 440 mV hysteresis; tolerate slow edges and EMI |
| VDD2 | Output-side power supply | Supplies receiver and output driver circuitry; independent of VDD1 for galvanic isolation |
| GND2 | Output-side ground reference | Return path for VDD2; forms isolated domain with VDD2 and B1–B4 |
| EN | Enable control input (VDD2 side) | Active-high; places all B1–B4 outputs in high-impedance state when low |
| B1–B4 | Isolated digital outputs (VDD2 side) | CMOS-compatible outputs with ~50 Ω impedance; default low during VDD1 power loss |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Silicon dioxide dielectric enables 60-year lifetime at rated voltage and eliminates LED aging concerns |
| Tri-state enable (EN) | Single-pin control disables all four outputs into high-Z, supporting bus sharing and hot-swap capability |
| Fail-safe low-default mode | Guarantees defined logic-low output when input-side power fails-critical for fault-tolerant gate drive circuits |
| Ultra-low power at 1 Mbps | 1.6 mA per channel at 5 V (6.4 mA total), reducing thermal load in dense BMS modules |
| AEC-Q100 qualified | Automotive-grade version (–A suffix) meets Grade 1 (–40 to 125 °C) stress testing and zero-defect manufacturing flow |
Applications
| Motor Control Systems | Battery Management Systems |
|---|---|
Use Scenario: Isolating PWM signals between MCU and IGBT/SiC gate drivers in traction inverters. IC Role / Device Role / Timing Role: Unidirectional level-shifting and noise-immune signal transmission across high dv/dt barriers. Use Value: Enables precise 150 Mbps timing control with <10 ns propagation delay and 60 kV/µs CMTI to prevent false triggering. |
Use Scenario: Transmitting cell voltage monitoring data and pack contactor control signals across isolation boundary in EV battery packs. IC Role / Device Role / Timing Role: Providing reinforced 2.5 kVRMS isolation for UART and GPIO signals between analog front-end and host MCU. Use Value: Fail-safe low-default output ensures contactors de-energize safely during MCU power interruption. |
| Industrial PLC I/O Modules | On-Board Chargers |
Use Scenario: Isolating digital inputs from field sensors (e.g., limit switches, encoders) in harsh factory environments. IC Role / Device Role / Timing Role: Converting noisy 24 V DC sensor signals to clean 3.3 V logic levels for PLC CPU. Use Value: Schmitt-trigger inputs and 35 kV/µs CMTI suppress EMI from nearby VFDs and solenoids. |
Use Scenario: Isolating communication lines (e.g., CAN, SPI) between AC/DC controller and DC/DC stage in bidirectional OBCs. IC Role / Device Role / Timing Role: Enabling high-speed, low-latency data exchange while maintaining reinforced 2.5 kVRMS safety separation. Use Value: 150 Mbps capability supports real-time telemetry and firmware updates without compromising isolation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8640BB-B-IS1 | Industrial-grade (–I suffix); identical electrical specs and pinout; no AEC-Q100 qualification | Lacks automotive PPAP documentation, IMDS/CAMDS support, and zero-defect process controls | Select for cost-sensitive industrial designs where automotive traceability is not required |
| ADUM140D0BRZ | Analog Devices quad-channel isolator; 150 Mbps, 2.5 kVRMS, but higher 10.5 mA/channel @ 100 Mbps (vs. 5.5 mA) | Higher power consumption limits use in thermally constrained BMS modules | Choose only if legacy ADI ecosystem integration or specific timing margin requirements justify trade-off |
Compared with SI8640BB-AS1, SI8640BB-B-IS1 offers identical performance at lower cost but lacks automotive compliance documentation, while ADUM140D0BRZ provides functional equivalence with higher quiescent current-making SI8640BB-AS1 optimal for AEC-Q100–mandated, power-sensitive automotive isolation.
Availability
SI8640BB-AS1 is available at Aetrix Electronics and suitable for motor control systems, battery management systems, and on-board chargers requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI8640BB-AS1 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, low-power digital isolation in automotive and industrial systems-emphasizing AEC-Q100 compliance, 60-year lifetime, and RF-based robustness over optocoupler alternatives.
FAQ
What is the isolation rating and certification status of SI8640BB-AS1?
SI8640BB-AS1 provides 2.5 kVRMS reinforced isolation and is certified to UL 1577 (1 min), CSA Component Notice 5A, VDE 0884-10 (basic insulation), IEC 60950-1/62368-1, and CQC GB4943.1. As an automotive-grade part, it also meets AEC-Q100 Grade 1 requirements and supports AIAG-compliant PPAP documentation.
Does SI8640BB-AS1 require external components for basic operation?
Yes, SI8640BB-AS1 requires two 0.1 µF ceramic bypass capacitors-one between VDD1 and GND1, and another between VDD2 and GND2-placed as close as possible to the package pins. No pull-up/down resistors are needed, as Schmitt-trigger inputs and fail-safe default outputs are internally implemented.
How does the EN pin function on SI8640BB-AS1?
The EN pin on SI8640BB-AS1 is an active-high enable input located on the VDD2 (output) side. When EN = low, all four B1–B4 outputs enter high-impedance state. When EN = high or floating (internally pulled up), outputs follow A1–A4 inputs. This enables centralized control of isolated signal paths in modular systems.
What is the default output behavior of SI8640BB-AS1 during input-side power loss?
SI8640BB-AS1 is ordered with a fail-safe "low" default output (denoted by "BB" in the part number). When VDD1 is unpowered while VDD2 remains active, all B1–B4 outputs drive logic low within 12 ns-ensuring safe shutdown of downstream power stages in automotive and industrial safety architectures.
Can SI8640BB-AS1 operate across different supply voltages on each side?
Yes, SI8640BB-AS1 supports independent 2.5–5.5 V supplies on VDD1 and VDD2 sides, enabling level translation between 3.3 V MCUs and 5 V analog subsystems. Both sides feature separate UVLO thresholds (1.95 V rising, 1.88 V falling), ensuring reliable startup and shutdown sequencing without cross-side dependency.
SI8640BB-AS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 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-AS1 FAQ
1.How can I place an order for SI8640BB-AS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8640BB-AS1 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-AS1 reliable?
The price and inventory of SI8640BB-AS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8640BB-AS1 is usually 5 days.
3.What payment methods are accepted for SI8640BB-AS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8640BB-AS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8640BB-AS1?
SI8640BB-AS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8640BB-AS1 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-AS1?
For technical support, including SI8640BB-AS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8640BB-AS1 requirements.
6.How does Aetrix verify that SI8640BB-AS1 is sourced from the original manufacturer or authorized distributors?
All SI8640BB-AS1 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-AS1 meets industry standards.
7.What is the process for return or replacement of SI8640BB-AS1?
All SI8640BB-AS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8640BB-AS1, 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-AS1 part is unused and in its original packaging.
Return procedure for SI8640BB-AS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8640BB-AS1 Tags
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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
-
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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