My Inquiry
My Account
Skyworks Solutions Inc. SI8642BD-AS2
- Part No.:
- SI8642BD-AS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8642BD-AS2.pdf
- Description:
- AUTOMOTIVE 5 KV 2 FORWARD & 2 RE
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8642BD-AS2 from Skyworks is a quad-channel digital isolator with 2 input channels on VDD1 side and 2 output channels on VDD2 side, providing reinforced 5 kVRMS isolation in a wide-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 dual supply rails. It is used in isolated motor control gate drivers and battery management system signal interfaces where high CMTI and fail-safe default-low operation are required.
For engineers reviewing the SI8642BD-AS2 datasheet, SI8642BD-AS2 pinout, SI8642BD-AS2 application, or SI8642BD-AS2 equivalent, key selection criteria include its 5 kVRMS reinforced isolation rating (VDE 0884-10 compliant), selectable default-low fail-safe mode, tri-state enable control per side, and ultra-low power consumption at 100 Mbps (11 mA per side at 5 V).
Technical Context
The SI8642BD-AS2 implements RF-based on/off keying across a silicon dioxide isolation barrier, eliminating start-up initialization and enabling robust noise immunity without optical degradation. Its architecture supports independent undervoltage lockout (UVLO) on both sides, with VDDUV+ = 2.24 V (typ) and hysteresis of 70 mV (typ).
It features two enable inputs (EN1 on Side A, EN2 on Side B), each controlling two outputs in tri-state mode. The device uses Schmitt-trigger inputs (VT+ = 1.67 V, VT– = 1.23 V, VHYS = 0.44 V typ) and delivers precise timing: channel-channel skew ≤2.5 ns, pulse width distortion ≤4.5 ns, and minimum pulse width = 5 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS reinforced insulation, certified to VDE 0884-10 and UL 1577 for safety-critical industrial and automotive systems |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like isolated SPI, RS-485, and CAN FD physical layer signaling |
| Propagation Delay | 8 ns typical - enables tight timing closure in real-time control loops such as motor phase current sampling |
| Supply Voltage Range | 2.5–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog front-ends without level shifters |
| CMTI | 60 kV/µs typical - ensures reliable operation in high dv/dt environments like IGBT/SiC gate driver feedback paths |
| Fail-Safe Default | Low output state during VDD1 loss - prevents unintended activation of downstream power stages in BMS or inverter systems |
| Power @ 100 Mbps | 11 mA per side at 5 V - reduces thermal load in densely packed isolated DC-DC controller modules |
Pinout & Package
SI8642BD-AS2 is housed in a RoHS-compliant wide-body SOIC-16 package (8 mm creepage, -IS2 variant) with reinforced insulation suitable for 5 kVRMS working voltage applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies power to input logic, EN1, and channel transmitters; requires 0.1 µF bypass capacitor |
| GND1 | Input-side ground reference | Reference for all Side A signals; must be separated from GND2 by isolation barrier |
| INA1–INA2 | Input data channels (Side A) | Digital inputs with Schmitt-trigger thresholds; tolerate 0.44 V hysteresis for noise rejection |
| EN1 | Enable control for Side A outputs | When low, places A3/A4 outputs in high-impedance state; internally pulled up to VDD1 |
| VDD2 | Output-side power supply | Supplies power to output drivers and EN2; independent of VDD1 for true galvanic isolation |
| GND2 | Output-side ground reference | Reference for all Side B signals; physically isolated from GND1 |
| OUTB1–OUTB2 | Isolated output channels (Side B) | CMOS-compatible outputs with 50 Ω nominal impedance; support controlled-impedance PCB routing |
| EN2 | Enable control for Side B outputs | When low, places B1/B2 outputs in high-impedance state; internally pulled up to VDD2 |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced 5 kVRMS isolation | Meets VDE 0884-10 and UL 1577 for functional safety in medical and industrial equipment requiring double insulation |
| Selectable fail-safe mode | Default-low output behavior during input-side power loss prevents hazardous actuation in motor drives and BMS |
| Tri-state enable per side | EN1 and EN2 allow independent output disable for multiplexing, clock gating, or fault containment in multi-isolator systems |
| Ultra-low power at speed | 11 mA per side at 100 Mbps and 5 V enables thermally constrained designs like compact EV on-board chargers |
| High CMTI (60 kV/µs) | Immune to fast transients in SiC/IGBT switching nodes, ensuring accurate isolated current/voltage sensing |
Applications
| Motor Control Feedback | Battery Management Interface |
|---|---|
Use Scenario: Isolating phase current sense signals and PWM gate drive feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Quad-channel isolator providing bidirectional signal integrity between MCU and isolated gate drivers while maintaining <10 ns timing alignment. Use Value: Enables precise current-loop timing with 2.5 ns channel-channel skew, critical for field-oriented control algorithms in servo drives. | Use Scenario: Transmitting cell voltage and temperature telemetry from high-voltage battery packs to central controllers. IC Role / Device Role / Timing Role: Isolating UART or SPI communication lines between battery monitor ICs and host MCU across 500–800 V potential differences. Use Value: 5 kVRMS reinforced isolation meets IEC 62368-1 requirements for EV battery systems, eliminating need for external isolation components. |
| Isolated ADC/DAC Interface | Traction Inverter Control |
Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC1306) with DSPs in industrial power supplies. IC Role / Device Role / Timing Role: Providing clean, jitter-free clock and data isolation for 20-bit precision converters operating at 20 MSPS. Use Value: 350 ps peak eye diagram jitter preserves SNR performance, avoiding quantization errors in high-resolution measurement systems. | Use Scenario: Isolating fault signals and status reporting from traction inverter gate driver boards to vehicle control units. IC Role / Device Role / Timing Role: Delivering fast, reliable overcurrent and desaturation fault alerts with <12 ns start-up time after power-on reset. Use Value: Sub-15 ns tSD (input power loss to valid default output) ensures immediate safe shutdown upon primary supply failure in ISO 26262 ASIL-D systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM2402BRWZ | 4-channel, 2/2 direction, 5 kVRMS, but only 25 Mbps max data rate and higher 15 ns propagation delay | Suitable for lower-speed industrial I/O modules, not for 100+ Mbps motor control or BMS telemetry | Choose ADUM2402BRWZ only when bandwidth <25 Mbps suffices and legacy Analog Devices design reuse is prioritized |
| ISO7742FDWR | 4-channel, 2/2 direction, 5 kVRMS, 100 Mbps max, 11 ns propagation delay, no selectable fail-safe default | Requires external pull-down resistors to emulate default-low behavior; lacks AEC-Q100 qualification | Prefer ISO7742FDWR for cost-sensitive non-automotive applications where internal fail-safe is not mandatory |
Compared with ADUM2402BRWZ and ISO7742FDWR, SI8642BD-AS2 uniquely combines 150 Mbps speed, 5 kVRMS reinforced isolation, AEC-Q100 qualification, and factory-configured default-low fail-safe mode-making it optimal for next-generation EV traction inverters and high-fidelity isolated data acquisition.
Availability
SI8642BD-AS2 is available at Aetrix Electronics and suitable for industrial automation systems, battery management systems, and traction inverter control requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SI8642BD-AS2 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, high-speed digital isolation in automotive, industrial, and medical systems demanding reinforced safety certification, ultra-low power, and precise timing.
FAQ
What is the isolation rating and safety certification of SI8642BD-AS2?
SI8642BD-AS2 provides 5 kVRMS reinforced isolation and is certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1. These certifications validate its use in safety-critical applications including EV battery management and medical power supplies where double insulation is mandated.
Does SI8642BD-AS2 support fail-safe operation, and how is it configured?
Yes, SI8642BD-AS2 is factory-configured for default-low fail-safe operation, meaning outputs go low when VDD1 is unpowered while VDD2 remains active. This behavior is fixed per ordering code and does not require external circuitry-unlike alternatives that need pull-down resistors to achieve similar functionality.
What are the supply voltage requirements for SI8642BD-AS2?
SI8642BD-AS2 operates with independent 2.5–5.5 V supplies on both VDD1 and VDD2 sides. This dual-rail flexibility allows direct interfacing with 3.3 V MCUs and 5 V analog circuits without level translation, and the 2.5 V minimum supports low-power battery-operated subsystems.
How does SI8642BD-AS2 handle electromagnetic interference in noisy environments?
SI8642BD-AS2 achieves 60 kV/µs common-mode transient immunity (CMTI) and incorporates Schmitt-trigger inputs with 0.44 V hysteresis. These features prevent false triggering in high dv/dt settings such as SiC inverter gate driver feedback paths, where rapid voltage transients exceed 50 kV/µs.
Is SI8642BD-AS2 qualified for automotive applications?
Yes, SI8642BD-AS2 carries the "-AS2" suffix indicating Automotive Grade qualification per AEC-Q100 Grade 1 (–40 to 125 °C). It is manufactured using automotive-specific process flows, supported by AIAG-compliant PPAP documentation and IMDS/CAMDS material declarations.
SI8642BD-AS2 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:
- 2/2
- 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
SI8642BD-AS2 FAQ
1.How can I place an order for SI8642BD-AS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642BD-AS2 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 SI8642BD-AS2 reliable?
The price and inventory of SI8642BD-AS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642BD-AS2 is usually 5 days.
3.What payment methods are accepted for SI8642BD-AS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642BD-AS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642BD-AS2?
SI8642BD-AS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642BD-AS2 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 SI8642BD-AS2?
For technical support, including SI8642BD-AS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642BD-AS2 requirements.
6.How does Aetrix verify that SI8642BD-AS2 is sourced from the original manufacturer or authorized distributors?
All SI8642BD-AS2 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 SI8642BD-AS2 meets industry standards.
7.What is the process for return or replacement of SI8642BD-AS2?
All SI8642BD-AS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8642BD-AS2, 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 SI8642BD-AS2 part is unused and in its original packaging.
Return procedure for SI8642BD-AS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642BD-AS2 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
