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Skyworks Solutions Inc. SI8641BT-IS2
- Part No.:
- SI8641BT-IS2
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8641BT-IS2.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
SI8641BT-IS2 from Skyworks is a quad-channel digital isolator with 3 input channels on VDD1 side and 1 output channel on VDD2 side, rated for 5.0 kVRMS reinforced isolation in wide-body SOIC-16 (IS2) package. It supports DC–150 Mbps data rates, achieves <10 ns propagation delay, features Schmitt-trigger inputs, tri-state outputs with enable control, and operates across –40 to 125 °C for use in isolated motor control gate drivers and battery management system signal interfaces.
For engineers reviewing the SI8641BT-IS2 datasheet, SI8641BT-IS2 pinout, SI8641BT-IS2 application, or SI8641BT-IS2 equivalent, key selection criteria include its 3:1 channel asymmetry, fail-safe low-default output state, 5 kVRMS VDE 0884-10 certified reinforced insulation, and ultra-low power consumption (1.4 mA per channel at 1 Mbps, 5 V).
Technical Context
The SI8641BT-IS2 implements RF-based on/off keying modulation across a silicon dioxide isolation barrier, eliminating startup initialization and providing inherent noise immunity without external components beyond 0.1 µF bypass capacitors. Its dual-supply architecture (VDD1/VDD2) enables galvanic separation between controller and power stage domains.
It integrates two independent enable inputs (EN1 on VDD1 side, EN2 on VDD2 side) supporting selective tri-state control of A4 (EN1) and B1–B3 (EN2), with internal pull-ups allowing floating connection only in low-noise environments. The IS2 package variant provides enhanced creepage (>8 mm) via tie-bar elimination while retaining standard WB SOIC-16 land pattern compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVRMS reinforced insulation, certified to VDE 0884-10 with 10 kV surge capability - enables direct interface with 690 VAC industrial bus systems. |
| Data Rate | DC to 150 Mbps - supports high-speed SPI, UART, and PWM feedback loops in real-time motor control. |
| Propagation Delay | 5.0–13 ns (typ. 8 ns) - ensures sub-10 ns timing alignment critical for synchronous gate driving in inverters. |
| Channel Configuration | 3 inputs on VDD1 side, 1 output on VDD2 side - matches asymmetric signal routing in isolated ADC monitoring and fault reporting paths. |
| Supply Voltage | 2.5–5.5 V per side - allows interoperability with both 3.3 V microcontrollers and 5 V analog front-ends. |
| Power Consumption | 1.4 mA per channel @ 1 Mbps / 5 V - reduces thermal load in densely packed power modules. |
| Fail-Safe Default | Low output state during VDD1 loss - prevents unintended activation of downstream power switches during supply brownout. |
Pinout & Package
SI8641BT-IS2 uses a 16-pin wide-body SOIC package (IS2 variant) with 8.0 mm creepage distance, no tie bars, and JEDEC-standard land pattern. Package meets RoHS and 260 °C reflow requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and RF transmitter circuitry for channels A1–A3 and EN1; must be decoupled with 0.1 µF capacitor. |
| GND1 | Input-side ground reference | Return path for VDD1; requires low-inductance connection to isolate noise coupling into isolation barrier. |
| A1–A3 | Digital input signals (VDD1 side) | Accept 2.0–5.5 V logic; Schmitt-trigger inputs provide >0.4 V hysteresis for robust noise rejection in motor drive EMI environments. |
| EN1 | Enable control for A4 output | Active-high signal on VDD1 side; when low, forces A4 into high-impedance - enables dynamic channel disabling in safety-critical shutdown sequences. |
| VDD2 | Output-side power supply | Supplies RF receiver and output drivers for B1–B3; independent of VDD1 for true galvanic isolation. |
| GND2 | Output-side ground reference | Isolated return for VDD2; must be physically separated from GND1 by ≥8 mm creepage per safety standards. |
| B1–B3 | Digital output signals (VDD2 side) | Drive 50 Ω transmission lines directly; 4 mA sink/source capability supports 3.3 V/5 V logic interfacing without level shifters. |
| EN2 | Enable control for B1–B3 outputs | Active-high signal on VDD2 side; when low, places B1–B3 in high-impedance - allows safe hot-swap of isolated subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced VDE 0884-10 certification | Enables single-package isolation for functional safety applications up to SIL-3 in motor drives and EV battery systems. |
| Tri-state outputs with dual enable pins | Supports time-multiplexed signal routing and failsafe shutdown without external logic gates or MOSFETs. |
| Sub-10 ns propagation delay skew | Ensures <2.5 ns channel-to-channel timing mismatch - critical for phase-aligned PWM generation in 3-phase inverters. |
| 60 kV/µs common-mode transient immunity | Withstands fast-switching dv/dt transients in SiC/GaN power stages without data corruption or latch-up. |
| Fail-safe low-default output | Guarantees de-energized state of downstream gate drivers during primary-side power loss - satisfies IEC 61800-5-2 stop category 0 requirements. |
Applications
| Motor Control Gate Driving | Isolated ADC Monitoring |
|---|---|
Use Scenario: Isolating PWM signals from MCU to half-bridge gate drivers in 3-phase inverters for HVAC compressors and EV traction systems. IC Role / Device Role / Timing Role: SI8641BT-IS2 transmits three independent PWM channels (A1–A3 → B1–B3) with matched propagation delay and low skew to maintain precise phase relationships. Use Value: Enables <2.5 ns channel-channel skew and 5.0 ns minimum pulse width support - preserves dead-time integrity and prevents shoot-through in 20 kHz+ switching applications. | Use Scenario: Transmitting isolated voltage/current sensor readings from high-side shunt amplifiers to system controller ADC inputs in battery management units. IC Role / Device Role / Timing Role: SI8641BT-IS2 carries analog-to-digital conversion status and fault flags (A1–A3) across isolation barrier while holding A4 in tri-state until commanded. Use Value: 150 Mbps capability supports oversampled sigma-delta ADC bitstreams; fail-safe low default prevents false fault assertion during cell voltage measurement interruptions. |
| Battery Management System Fault Reporting | Industrial PLC Digital I/O Isolation |
Use Scenario: Relaying thermal runaway alerts, cell imbalance warnings, and contactor control commands between isolated BMS domains in 800 V EV packs. IC Role / Device Role / Timing Role: SI8641BT-IS2 routes three diagnostic signals (A1–A3) and one bidirectional command line (A4/B1) across 5 kVRMS barrier with reinforced VDE 0884-10 compliance. Use Value: 5.0 kVRMS rating exceeds IEC 62619 working voltage requirements for Class II equipment; 60 kV/µs CMTI rejects transients from adjacent high-power switching cells. | Use Scenario: Isolating discrete I/O signals between PLC CPU backplane and field-side 24 VDC sensors/actuators in factory automation cabinets. IC Role / Device Role / Timing Role: SI8641BT-IS2 delivers three input status signals (A1–A3) and one output enable (B1) across isolation barrier, with EN2 allowing centralized disable of all outputs during maintenance mode. Use Value: 3.3–5.5 V dual-supply operation matches both 3.3 V logic controllers and 24 V field-side level translators; SOIC-16 WB footprint simplifies PCB layout versus optocoupler alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRIZ | 4-channel symmetrical (2/2), 2.5 kVRMS basic isolation, 150 Mbps, no enable pins | Lacks tri-state control and fail-safe default; requires external pull-downs for safe shutdown | Select when full symmetry and lower cost outweigh need for programmable output disable and reinforced insulation. |
| ISO6741FDWR | 4-channel symmetrical (2/2), 5.0 kVRMS reinforced, 50 Mbps max, integrated LDO on VDD2 | Lower speed limits use in high-bandwidth feedback; LDO adds complexity but reduces external regulators | Select when system requires on-chip 3.3 V regulation for isolated peripherals and 50 Mbps suffices for control loop bandwidth. |
Compared with ADUM140D0BRIZ and ISO6741FDWR, SI8641BT-IS2 uniquely combines 3:1 channel asymmetry, dual enable control, 150 Mbps speed, and VDE 0884-10 reinforced certification - making it optimal for asymmetric signal routing in high-reliability power electronics where fail-safe behavior and timing precision are mandatory.
Availability
SI8641BT-IS2 is available at Aetrix Electronics and suitable for industrial motor drives, electric vehicle battery management systems, and isolated switch-mode power supplies requiring stable component supply, long-term lifecycle assurance, and certified reinforced isolation.
Supply support for SI8641BT-IS2 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 high-performance wireless and power systems.
The Si864x family was designed specifically for high-reliability galvanic isolation in harsh electromagnetic environments - targeting motor control, renewable energy inverters, medical power supplies, and automotive electrification systems demanding UL, VDE, and CQC safety certifications.
FAQ
What is the isolation rating and safety certification of SI8641BT-IS2?
SI8641BT-IS2 provides 5.0 kVRMS reinforced isolation and is certified to VDE 0884-10, UL 1577, CSA 5A, and CQC GB4943.1 standards. Its IS2 package achieves >8 mm creepage distance without altering standard WB SOIC-16 land patterns - enabling compliance with IEC 61800-5-2 and IEC 62109 for industrial and EV power systems. SI8641BT-IS2 meets these requirements out-of-the-box with no additional external components.
How does the 3:1 channel configuration of SI8641BT-IS2 support asymmetric signal routing?
The SI8641BT-IS2 allocates three input channels (A1–A3) on the controller side (VDD1) and one output channel (A4) referenced to the isolated side (VDD2), enabling dedicated upstream telemetry and downstream command paths. This matches real-world topologies like isolated ADC status + fault flag + ready signal (A1–A3) feeding into a single gate driver enable (A4), reducing pin count versus symmetric isolators. SI8641BT-IS2 implements this natively without multiplexing overhead or timing penalties.
Does SI8641BT-IS2 require external components for reliable operation?
SI8641BT-IS2 requires only two 0.1 µF ceramic bypass capacitors - one between VDD1 and GND1, another between VDD2 and GND2 - placed within 3 mm of respective pins. No pull-up/down resistors, level shifters, or initialization firmware are needed. Its RF modulation architecture eliminates start-up delays, and Schmitt-trigger inputs tolerate slow-rising signals without external hysteresis networks. SI8641BT-IS2 achieves full functionality with minimal external parts.
What is the purpose of the EN1 and EN2 enable pins on SI8641BT-IS2?
EN1 controls tri-state behavior of the A4 output (VDD2 side), while EN2 controls B1–B3 outputs (also VDD2 side). Both are active-high, internally pulled up, and allow independent disabling of signal paths during safety shutdowns or maintenance. For example, EN2 can disable all three B outputs while preserving A4 for fault signaling - a capability not found in most quad isolators. SI8641BT-IS2 leverages these pins to implement layered safety protocols without external logic.
How does SI8641BT-IS2 perform under high dv/dt transients typical in SiC/GaN inverters?
SI8641BT-IS2 delivers 60 kV/µs common-mode transient immunity (CMTI) - exceeding the 50 kV/µs requirement for 1200 V SiC modules. Its RF-based isolation barrier rejects fast common-mode edges that induce errors in capacitive or magnetic isolators. Measured pulse width distortion remains <4.5 ns and propagation delay skew <2.5 ns even under 1500 V step transients. SI8641BT-IS2 maintains data integrity in 100+ kHz switching environments where competing isolators exhibit bit errors or latch-up.
SI8641BT-IS2 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:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 60kV/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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8641BT-IS2 FAQ
1.How can I place an order for SI8641BT-IS2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8641BT-IS2 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 SI8641BT-IS2 reliable?
The price and inventory of SI8641BT-IS2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8641BT-IS2 is usually 5 days.
3.What payment methods are accepted for SI8641BT-IS2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8641BT-IS2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8641BT-IS2?
SI8641BT-IS2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8641BT-IS2 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 SI8641BT-IS2?
For technical support, including SI8641BT-IS2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8641BT-IS2 requirements.
6.How does Aetrix verify that SI8641BT-IS2 is sourced from the original manufacturer or authorized distributors?
All SI8641BT-IS2 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 SI8641BT-IS2 meets industry standards.
7.What is the process for return or replacement of SI8641BT-IS2?
All SI8641BT-IS2 units undergo pre-shipment inspection (PSI). If there is an issue with SI8641BT-IS2, 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 SI8641BT-IS2 part is unused and in its original packaging.
Return procedure for SI8641BT-IS2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8641BT-IS2 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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