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Skyworks Solutions Inc. SI8461BA-B-IS1R
- Part No.:
- SI8461BA-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8461BA-B-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
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Product details
Overview
SI8461BA-B-IS1R from Skyworks Solutions is a six-channel, ultra-low-power digital isolator in a 16-pin narrow-body SOIC package, supporting up to 150 Mbps data rate with worst-case propagation delay under 9.5 ns, <1.5 ns pulse width distortion, and 0.5 ns channel-to-channel skew - deployed in isolated ADC interfaces and motor control gate drivers.
For engineers reviewing the SI8461BA-B-IS1R datasheet, SI8461BA-B-IS1R pinout, SI8461BA-B-IS1R application, or SI8461BA-B-IS1R equivalent, key selection criteria include its 2.7–5.5 V dual-supply operation, 2500 VRMS reinforced isolation rating, 25 kV/µs CMTI, and guaranteed timing performance across –40 to +125 °C at full speed.
Technical Context
The SI8461BA-B-IS1R implements capacitive isolation with on-chip RF modulation/demodulation circuitry, enabling high-speed signal transmission across galvanically isolated barriers without magnetic or optical components. It features independent primary- and secondary-side power domains (VDD1/VDD2), each supporting 2.7–5.5 V operation.
Its timing architecture delivers deterministic latency: propagation delay (3.0–9.5 ns), channel-channel skew (≤1.8 ns), and pulse width distortion (≤2.5 ns) are fully characterized over temperature and voltage. The device requires no startup initialization and achieves 15–40 µs start-up time after power application.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Six unidirectional isolated channels - supports full-duplex or asymmetric I/O configurations in industrial bus and feedback loop applications. |
| Max Data Rate | 150 Mbps - enables real-time sampling of high-resolution encoders and fast PWM signals in servo drives. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures sub-10 ns latency for closed-loop current sensing and gate driver timing synchronization. |
| Isolation Voltage | 2500 VRMS (1 min) - certified to UL 1577, CSA 5A, and VDE 0884-2 for reinforced insulation in 300 VRMS working voltage systems. |
| Supply Range | 2.7–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| CMTI | 25 kV/µs - maintains signal integrity during fast-switching events in SiC/GaN inverter half-bridges. |
| Operating Temp | –40 to +125 °C - validated for continuous 150 Mbps operation in under-hood automotive and industrial motor control environments. |
Pinout & Package
SI8461BA-B-IS1R is housed in a RoHS-compliant 16-pin narrow-body SOIC package (5.3 mm width, 10.3 mm length), with creepage and clearance ≥3.9 mm per IEC 60664-1 and VDE-certified internal insulation structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power input for input-side logic and isolation transmitter; supports 2.7–5.5 V with bypass capacitor required. |
| GND1 | Primary-side ground | Reference return for VDD1 domain; must be separated from GND2 by isolation barrier. |
| IN1–IN3 | Input signal terminals | Three unidirectional CMOS-compatible inputs referenced to GND1; accept 0–VDD1 logic levels. |
| VDD2 | Secondary-side supply | Power input for output-side logic and isolation receiver; independent 2.7–5.5 V domain. |
| GND2 | Secondary-side ground | Reference return for VDD2 domain; galvanically isolated from GND1. |
| OUT1–OUT3 | Output signal terminals | Three unidirectional CMOS outputs referenced to GND2; drive loads up to 10 mA with 85 Ω nominal output impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 100 Mbps | 9.0–11.3 mA per side at 5 V (typ), enabling thermally constrained designs in sealed inverters and PLC modules. |
| Precision timing | 0.5 ns channel-channel skew and 1.5 ns pulse width distortion - critical for synchronized multi-phase current sampling. |
| No startup initialization | Valid output within 40 µs of power-on - eliminates boot-time delays in safety-critical motor enable sequences. |
| High CMTI immunity | 25 kV/µs common-mode transient rejection - prevents false triggering during 100+ A/ns switching transients in SiC inverters. |
| Wide supply compatibility | 2.7–5.5 V operation on both sides - supports mixed-voltage systems (e.g., 3.3 V MCU + 5 V gate driver IC). |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in three-phase inverter stacks using SiC MOSFETs. IC Role / Device Role / Timing Role: Six-channel isolator providing independent high-side/low-side gate signal isolation and analog sensor data isolation across the same barrier. Use Value: Enables precise timing alignment (<1.8 ns skew) between gate commands and current measurement, improving FOC accuracy and reducing torque ripple. |
Use Scenario: Isolating serial interface lines (SPI SCLK/MOSI/MISO) between a precision delta-sigma ADC and host MCU in high-noise power supply monitoring. IC Role / Device Role / Timing Role: Three-channel isolator preserving SPI clock integrity and data validity at 20+ MHz while blocking ground loops. Use Value: Maintains 16-bit effective resolution by suppressing noise coupling into ADC reference and digital lines via 25 kV/µs CMTI. |
| Hybrid Electric Vehicle Inverter | Isolated Switch-Mode Power Supply |
|
Use Scenario: Signal isolation in traction inverter control boards where MCU outputs drive isolated gate drivers and receive fault signals from desaturation detection circuits. IC Role / Device Role / Timing Role: Bidirectional isolation of control and protection signals across reinforced insulation barrier rated for 300 VRMS working voltage. Use Value: Meets ISO 26262 ASIL-B functional safety requirements through UL/VDE/CSA certification and 60-year lifetime at rated voltage. |
Use Scenario: Isolating feedback signals (voltage and current sense) from secondary-side regulation circuitry to primary-side PWM controller in 1–3 kW telecom rectifiers. IC Role / Device Role / Timing Role: Unidirectional isolator transmitting error amplifier output and overcurrent flags across 2500 VRMS barrier. Use Value: Eliminates optocoupler aging and gain drift, enabling stable regulation over 10+ year field life with <10 ns propagation delay variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRZ | Four-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; higher typical supply current (12.5 mA @ 100 Mbps, 5 V) | Limited to four channels; requires two devices for six-signal isolation, increasing PCB area and BOM count | Choose when only four signals need isolation and ADI ecosystem integration is prioritized |
| ISO6760FRDWR | Six-channel, 50 Mbps, 5 kVRMS, SOIC-16; lower speed but higher isolation rating and lower CMTI (10 kV/µs) | Not suitable for >50 Mbps encoder or fast PWM applications; better suited for low-speed power monitoring | Choose when system-level isolation voltage >3.75 kVRMS is mandated and data rate ≤50 Mbps suffices |
Compared with ADUM140D0BRZ and ISO6760FRDWR, SI8461BA-B-IS1R uniquely balances six-channel density, 150 Mbps speed, 25 kV/µs CMTI, and sub-10 ns timing - making it optimal for space-constrained, high-bandwidth motor control and power conversion where timing fidelity and noise immunity are co-critical.
Availability
SI8461BA-B-IS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated ADC interfaces, hybrid electric vehicle inverters, and isolated switch-mode power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8461BA-B-IS1R 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 Si846x family was designed specifically for high-speed, low-power galvanic isolation in demanding industrial, automotive, and energy infrastructure applications - replacing optocouplers and discrete transformer-based isolators with integrated CMOS solutions.
FAQ
What is the maximum operating temperature for SI8461BA-B-IS1R at full 150 Mbps data rate?
The SI8461BA-B-IS1R is fully specified for continuous 150 Mbps operation from –40 to +125 °C ambient temperature, with all timing parameters (propagation delay, skew, pulse width distortion) guaranteed across this range at 2.7–5.5 V supply. This makes SI8461BA-B-IS1R suitable for under-hood automotive and high-temperature industrial environments without derating.
Does SI8461BA-B-IS1R require external components for basic operation?
Yes - SI8461BA-B-IS1R requires only 0.1 µF ceramic bypass capacitors on both VDD1 and VDD2 pins, placed as close as possible to the device. No external resistors, transformers, or level shifters are needed, simplifying layout and reducing BOM count compared to optocoupler-based isolation.
How does SI8461BA-B-IS1R achieve its 25 kV/µs CMTI rating?
SI8461BA-B-IS1R achieves 25 kV/µs common-mode transient immunity through differential capacitive isolation architecture with tightly matched internal signal paths and on-chip noise rejection circuitry. This is verified per IEC 61000-4-4 and enables reliable operation in SiC/GaN inverter environments with rapid dV/dt edges.
Is SI8461BA-B-IS1R pin-compatible with other members of the Si846x family?
Yes - SI8461BA-B-IS1R shares identical pinout and package (16-pin narrow-body SOIC) with all Si8460/61/62/63 variants. Channel count and speed grade differ by part number (e.g., Si8460B = 1-channel, Si8461B = 6-channel), but PCB layout remains unchanged across the family for design reuse.
What safety certifications apply to SI8461BA-B-IS1R?
SI8461BA-B-IS1R carries UL 1577 (2500 VRMS), CSA Component Acceptance Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2) certifications. These cover reinforced insulation for up to 300 VRMS working voltage and are production-tested to 3000 VRMS for 1 second per regulatory requirements.
SI8461BA-B-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 5/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.5ns, 9.5ns
- Pulse Width Distortion (Max):
- 2.5ns
- Rise / Fall Time (Typ):
- 3.8ns, 2.8ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8461BA-B-IS1R FAQ
1.How can I place an order for SI8461BA-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8461BA-B-IS1R 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 SI8461BA-B-IS1R reliable?
The price and inventory of SI8461BA-B-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8461BA-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8461BA-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8461BA-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8461BA-B-IS1R?
SI8461BA-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8461BA-B-IS1R 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 SI8461BA-B-IS1R?
For technical support, including SI8461BA-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8461BA-B-IS1R requirements.
6.How does Aetrix verify that SI8461BA-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8461BA-B-IS1R 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 SI8461BA-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8461BA-B-IS1R?
All SI8461BA-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8461BA-B-IS1R, 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 SI8461BA-B-IS1R part is unused and in its original packaging.
Return procedure for SI8461BA-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8461BA-B-IS1R 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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