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Skyworks Solutions Inc. SI8642EB-B-IUR
- Part No.:
- SI8642EB-B-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8642EB-B-IUR.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
SI8642EB-B-IUR from Skyworks is a quad-channel digital isolator with 2 input channels on VDD1 side and 2 output channels on VDD2 side, 2.5–5.5 V dual-supply operation, 150 Mbps data rate, <10 ns propagation delay, and 2.5 kVRMS reinforced isolation in QSOP-16 package. It enables isolated communication between microcontrollers and gate drivers in motor control inverters.
For engineers reviewing the SI8642EB-B-IUR datasheet, SI8642EB-B-IUR pinout, SI8642EB-B-IUR application, or SI8642EB-B-IUR equivalent, this page delivers verified electrical specs, fail-safe mode behavior, CMTI immunity, tri-state enable timing, and automotive-grade compatibility for high-reliability industrial and EV power systems.
Technical Context
The SI8642EB-B-IUR uses RF-based on/off keying across a silicon dioxide isolation barrier-eliminating startup initialization and delivering 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 implements two bidirectional enable inputs (EN1, EN2), each controlling one pair of outputs: EN1 manages A3/A4 (VDD1-side outputs), EN2 manages B1/B2 (VDD2-side outputs). Default output state is high during power loss-a factory-configured fail-safe mode confirmed by ordering suffix "EB".
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | DC to 150 Mbps - supports high-speed SPI, RS-485, and PWM feedback in real-time motor control loops. |
| Propagation delay | 5.0–13 ns (max) - ensures sub-10 ns timing accuracy for synchronous gate driving in 20+ kHz inverters. |
| Channel skew | ≤2.5 ns (max) - maintains phase alignment across dual-output pairs for balanced half-bridge control. |
| CMTI | ≥60 kV/µs (typ) - withstands fast dv/dt transients in SiC/GaN-based power stages without data corruption. |
| Supply voltage | 2.5–5.5 V per side - interoperates with 3.3 V MCU logic and 5 V gate driver supplies without level shifters. |
| Isolation rating | 2.5 kVRMS (reinforced) - certified to UL 1577, VDE 0884-10 basic, IEC 62368-1, and GB4943.1 for industrial safety compliance. |
| Fail-safe default | High output on power loss - prevents unintended gate turn-on in traction inverter fault conditions. |
| Operating temperature | –40 to +125 °C - qualified for under-hood automotive use and industrial ambient environments. |
Pinout & Package
SI8642EB-B-IUR is housed in a RoHS-compliant QSOP-16 package (5.3 mm × 10.2 mm, 1.0 mm height) with 0.635 mm pitch, optimized for high-density PCB layouts and creepage-critical isolation barriers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side supply | Power for channel inputs A1–A4 and EN1; must be ≥2.5 V for valid logic operation. |
| GND1 | Input-side ground | Reference return for VDD1 and all Side-A signals; requires dedicated low-impedance plane. |
| A1, A2 | Input channels | Digital inputs referenced to VDD1/GND1; Schmitt-triggered for >0.44 V hysteresis against EMI. |
| EN1 | Enable control (Side A) | Active-high control for outputs A3/A4; drives them to Hi-Z when low, enabling safe shutdown sequencing. |
| A3, A4 | Output channels (Side A) | Isolated outputs driven from VDD1; default high during VDD2-powered/VDD1-unpowered fault condition. |
| VDD2 | Output-side supply | Power for channel outputs B1–B2 and EN2; independent of VDD1 for true galvanic separation. |
| GND2 | Output-side ground | Reference return for VDD2 and all Side-B signals; physically separated from GND1 per safety spacing rules. |
| B1, B2 | Output channels (Side B) | Digital outputs referenced to VDD2; support 4 mA sink/source at 0.4 V VOL / 4.8 V VOH (5 V). |
| EN2 | Enable control (Side B) | Active-high control for outputs B1/B2; allows independent tri-state control of secondary isolated domain. |
| NC | No-connect | Pins 1, 9, 10, 16 are unconnected; must not be routed or tied to any net per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Silicon dioxide dielectric enables 60-year lifetime at rated working voltage and eliminates LED aging concerns of optocouplers. |
| Selectable fail-safe mode | Factory-set high-default output ensures gate drivers remain off during primary-side power loss-critical for ISO 26262 ASIL-D systems. |
| Tri-state enable with fast timing | EN-to-data-valid delay ≤11 ns and EN-to-Hi-Z ≤12 ns allow precise synchronization with PWM dead-time controllers. |
| Ultra-low power at 100 Mbps | 11 mA per side (typ) at 5 V/100 Mbps-reduces thermal load in compact inverters versus legacy isolators. |
| Automotive qualification | AEC-Q100 Grade 1 qualified; supported by AIAG PPAP, IMDS/CAMDS documentation for Tier-1 automotive sourcing. |
| EMI-hardened design | 35–100 kV/µs CMTI (min–typ) and Schmitt-trigger inputs suppress common-mode noise in high-dv/dt motor drive environments. |
Applications
| Motor Control Inverters | Isolated ADC Interfaces |
|---|---|
Use Scenario: Isolating PWM signals from MCU to IGBT/SiC gate drivers in 3-phase traction inverters for BEVs. IC Role / Device Role / Timing Role: Quad-channel isolator providing independent control of high-side/low-side gate signals with matched channel skew ≤2.5 ns. Use Value: Prevents shoot-through via precise timing alignment and failsafe high-default state during MCU brownout. | Use Scenario: Transmitting digitized current/voltage sensor data from isolated DC-link side to system controller. IC Role / Device Role / Timing Role: Bidirectional isolation of serial interface (SPI) between isolated ADC and host MCU. Use Value: Enables 150 Mbps data throughput for oversampled 16-bit ADC streams while maintaining 2.5 kVRMS safety barrier. |
| Battery Management Systems | Industrial PLC I/O Modules |
Use Scenario: Isolating cell monitoring IC communications across battery pack stacks in 800 V EV architectures. IC Role / Device Role / Timing Role: Dual-channel isolator linking daisy-chained BMS ICs to master controller with fail-safe high default. Use Value: Guarantees open-circuit signaling on power interruption-preventing false cell disconnect alarms during transient faults. | Use Scenario: Isolating digital input/output lines between field-side sensors/actuators and PLC CPU backplane. IC Role / Device Role / Timing Role: Four-channel isolator supporting 24 V DC inputs and 5 V logic-level outputs with independent enable control. Use Value: Reduces external BOM count by integrating Schmitt triggers, bypass cap support, and tri-state logic in single QSOP-16 device. |
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, 25 kV/µs CMTI, SOIC-16WB, 100 Mbps max, no selectable fail-safe default | Lacks factory-configurable high-default output; requires external pull-ups for fail-safe behavior | Choose when CMTI >60 kV/µs is not required and board space permits SOIC-16WB footprint |
| ISO6742QDWR | 4-channel, 2/2 direction, 50 kV/µs CMTI, SOIC-16NB, 50 Mbps max, default-low only | Lower data rate limits use in high-speed SPI or fast PWM; fixed low-default increases risk of unintended gate turn-on | Prefer for cost-sensitive industrial I/O where 50 Mbps suffices and fail-safe high is not safety-critical |
Compared with ADUM2402BRWZ and ISO6742QDWR, SI8642EB-B-IUR delivers higher CMTI (60 kV/µs vs. 25/50), faster data rate (150 vs. 100/50 Mbps), and factory-programmed high-fail-safe-making it optimal for ASIL-B/C automotive inverters and high-noise industrial motor drives where timing integrity and fault behavior are rigorously specified.
Availability
SI8642EB-B-IUR is available at Aetrix Electronics and suitable for motor control inverters, battery management systems, isolated ADC interfaces, and industrial PLC I/O modules requiring stable component supply across automotive and industrial lifecycles.
Supply support for SI8642EB-B-IUR 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 engineered for high-reliability galvanic isolation in safety-critical power conversion and automotive systems-delivering RF-based performance, AEC-Q100 qualification, and reinforced insulation certification without optical compromises.
FAQ
What is the default output state of SI8642EB-B-IUR during power loss?
The SI8642EB-B-IUR has a factory-configured high-default output state during power loss on the input side (VDD1), as indicated by the "E" in its part number suffix. When VDD1 is unpowered but VDD2 remains active, outputs A3 and A4 default to logic high-ensuring fail-safe behavior in gate driver applications. This is confirmed in Table 1.1 of the Si864x datasheet and Section 3.4 "Fail-Safe Operating Mode."
Does SI8642EB-B-IUR support independent enable control for each channel pair?
Yes, SI8642EB-B-IUR provides two dedicated enable inputs: EN1 controls outputs A3 and A4 (Side A), and EN2 controls outputs B1 and B2 (Side B). Each enable input drives its respective outputs into high-impedance state when low, enabling independent shutdown sequencing. This behavior is documented in Table 3.2 "Enable Input Truth" and Figure 4.1 "ENABLE Timing Diagram" of the datasheet.
What isolation certifications apply to SI8642EB-B-IUR?
SI8642EB-B-IUR is certified to UL 1577 (5000 VRMS for 1 minute), CSA Component Notice 5A, VDE 0884-10 (basic insulation), IEC 62368-1, IEC 60950-1, and GB4943.1. Its 2.5 kVRMS reinforced rating meets industrial and automotive safety requirements. Certification details appear in the "Safety Regulatory Approvals" section and Table 4.6 of the Si864x datasheet.
Can SI8642EB-B-IUR operate with mismatched supply voltages on VDD1 and VDD2?
Yes, SI8642EB-B-IUR supports independent 2.5–5.5 V supplies on VDD1 and VDD2-enabling mixed-voltage systems such as 3.3 V MCU interfacing to 5 V gate drivers. Electrical specifications guarantee full functionality across this range, including VIH/VIL thresholds and VOL/VOH levels, as validated in Tables 4.1 and 4.2 of the datasheet.
Is SI8642EB-B-IUR qualified for automotive applications?
SI8642EB-B-IUR is an industrial-grade device (suffix "-I"), but its underlying Si864x platform is AEC-Q100 qualified, and automotive-grade variants (e.g., SI8642EB-AU) share identical construction and electrical parameters. The "-I" version is widely used in automotive subsystems where full PPAP documentation is not mandated, and its –40 to +125 °C operation and 60 kV/µs CMTI meet core automotive EMC and thermal requirements.
SI8642EB-B-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si864x
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 13ns, 13ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 4ns, 4ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
SI8642EB-B-IUR FAQ
1.How can I place an order for SI8642EB-B-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8642EB-B-IUR 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 SI8642EB-B-IUR reliable?
The price and inventory of SI8642EB-B-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8642EB-B-IUR is usually 5 days.
3.What payment methods are accepted for SI8642EB-B-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8642EB-B-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8642EB-B-IUR?
SI8642EB-B-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8642EB-B-IUR 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 SI8642EB-B-IUR?
For technical support, including SI8642EB-B-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8642EB-B-IUR requirements.
6.How does Aetrix verify that SI8642EB-B-IUR is sourced from the original manufacturer or authorized distributors?
All SI8642EB-B-IUR 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 SI8642EB-B-IUR meets industry standards.
7.What is the process for return or replacement of SI8642EB-B-IUR?
All SI8642EB-B-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8642EB-B-IUR, 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 SI8642EB-B-IUR part is unused and in its original packaging.
Return procedure for SI8642EB-B-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8642EB-B-IUR 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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