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Skyworks Solutions Inc. SI8461AA-B-IS1
- Part No.:
- SI8461AA-B-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8461AA-B-IS1.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
SI8461AA-B-IS1 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 <9.5 ns, 0.5 ns channel-to-channel skew, and 25 kV/µs common-mode transient immunity. It operates across 2.70–5.5 V supply rails and delivers <9.0 mA per channel at 100 Mbps (5 V), enabling high-speed isolation in motor control and isolated power supplies.
For engineers reviewing the SI8461AA-B-IS1 datasheet, SI8461AA-B-IS1 pinout, SI8461AA-B-IS1 application, or SI8461AA-B-IS1 equivalent, key selection criteria include its 150 Mbps capability, 2.5 kVRMS reinforced insulation (UL/CSA/VDE certified), 6-channel unidirectional configuration, and operation from –40°C to +125°C at full speed - critical for industrial inverters and isolated ADC interfaces.
Technical Context
The SI8461AA-B-IS1 implements capacitive isolation using on-chip RF modulation/demodulation across a silicon dioxide barrier, eliminating magnetic coupling limitations. Its six isolated channels are configured as unidirectional signal paths (no bidirectional pins), each with independent input/output supply domains (VDD1/VDD2) and internal 85 Ω output impedance for controlled-impedance PCB routing.
It achieves precise timing via matched propagation paths: typical pulse width distortion is 1.5 ns, propagation delay skew between units is ≤3.0 ns, and minimum pulse width is 6.0 ns at 150 Mbps - enabling reliable high-speed serial communication in servo drives and digital power controllers without external timing compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-speed SPI, UART, and digital encoder interfaces without oversampling or retiming. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns deterministic latency for real-time feedback loops in motor control. |
| Channel-Channel Skew | 0.5 ns (typ) - ensures tight synchronization across all six isolated signals in multi-phase gate driver systems. |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements per UL 1577, CSA 5A, and VDE 0884-2 for industrial safety compliance. |
| Supply Range | 2.70–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems without level shifters. |
| CMTI | 25 kV/µs - suppresses noise-induced glitches during fast-switching events in IGBT/SiC inverter stages. |
| Power @ 100 Mbps | <9.0 mA per channel (5 V) - reduces thermal load and simplifies power budgeting in space-constrained isolated DC-DC controllers. |
Pinout & Package
SI8461AA-B-IS1 is housed in a RoHS-compliant 16-pin narrow-body SOIC package (7.5 mm × 10.3 mm, 1.27 mm pitch) with creepage/clearance ≥3.9 mm and reinforced insulation barrier rated for 2500 VRMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Provides power to input-side logic and channel 1–3 drivers; must be bypassed with 0.1 µF capacitor near pin. |
| GND1 | Primary-side ground | Reference for input-side signals and VDD1; requires low-inductance connection to minimize noise coupling. |
| IN1–IN3 | Input signals (side 1) | Accept CMOS-level inputs (VIH ≥2.0 V, VIL ≤0.8 V); no start-up initialization required. |
| OUT1–OUT3 | Output signals (side 2) | Drive CMOS loads with VOH ≥VDD2–0.4 V, VOL ≤0.4 V; 85 Ω nominal output impedance. |
| VDD2 | Secondary-side supply | Independent supply for output-side logic and channel 4–6 receivers; supports split-rail isolation schemes. |
| GND2 | Secondary-side ground | Isolated reference for output-side circuitry; must be separated from GND1 by ≥3.9 mm on PCB. |
| IN4–IN6 | Input signals (side 2) | Enable reverse-direction isolation; electrically identical to IN1–IN3 but referenced to VDD2/GND2. |
| OUT4–OUT6 | Output signals (side 1) | Deliver isolated outputs back to primary side; share VDD1/GND1 domain with IN1–IN3. |
Key Features
| Feature | Design Value |
|---|---|
| 6-channel unidirectional isolation | Three channels isolate signals from side 1 → side 2 (IN1–3 → OUT1–3); three from side 2 → side 1 (IN4–6 → OUT4–6), enabling full-duplex isolated communication. |
| Ultra-low power at high speed | Draws only 9.0 mA per channel at 100 Mbps and 5 V - 40% lower than legacy optocouplers at same data rate, reducing heat in dense power modules. |
| Precision timing performance | 0.5 ns channel-to-channel skew and 1.5 ns pulse width distortion ensure accurate sampling of synchronized PWM or encoder edges in servo systems. |
| Robust EMC immunity | 25 kV/µs CMTI rating prevents data corruption during rapid voltage transients in motor drive half-bridges or grid-tied inverters. |
| Safety-certified isolation barrier | 2500 VRMS withstand voltage validated per UL 1577, CSA 5A (IEC 61010-1), and VDE 0884-2 - eliminates need for external certification testing in end equipment. |
Applications
| Industrial Motor Drives | Isolated Power Supply Control |
|---|---|
Use Scenario: Isolating gate driver enable/disable signals and current-sense feedback in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: Six-channel isolator provides independent, low-skew paths for PWM dead-time control, fault reporting, and analog-to-digital converter isolation. Use Value: Enables <9.5 ns propagation delay and 0.5 ns inter-channel skew to maintain precise timing margins in 20 kHz+ switching applications. | Use Scenario: Providing feedback and control isolation in flyback or forward converters with secondary-side regulation. IC Role / Device Role / Timing Role: Transfers error amplifier output and synchronous rectifier timing across isolation boundary while rejecting high dv/dt noise. Use Value: 25 kV/µs CMTI and 2500 VRMS rating prevent false triggering during transformer ringing or MOSFET turn-off events. |
| Isolated Data Acquisition | Renewable Energy Inverters |
Use Scenario: Isolating SPI interfaces between microcontroller and isolated ADCs measuring phase currents/voltages in grid-tied solar inverters. IC Role / Device Role / Timing Role: Delivers high-speed, low-jitter clock and data lines across isolation barrier with minimal added latency. Use Value: 150 Mbps capability supports oversampled 16-bit ADCs at >1 MSPS without protocol bottlenecks. | Use Scenario: Isolating communication between central controller and string-level optimizers or battery management units in PV systems. IC Role / Device Role / Timing Role: Provides galvanic separation for RS-485 or CAN physical layer signals while maintaining ESD robustness. Use Value: 60-year lifetime at rated working voltage ensures long-term reliability in outdoor, unattended installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRZ | Quad-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; lacks sixth channel and has higher 12 ns max propagation delay. | Requires two devices for six-channel coverage; less suitable for compact motor control PCBs needing full 6-channel integration. | Select when quad-channel count suffices and ADI ecosystem compatibility is prioritized over channel density. |
| ISO6760QDWR | Six-channel, 50 Mbps, 5 kVRMS, SOIC-16; slower data rate but higher isolation rating and automotive AEC-Q100 qualification. | Better suited for automotive battery management where 50 Mbps suffices and 5 kVRMS is mandated; not viable for 100+ Mbps industrial comms. | Choose for automotive-grade designs requiring extended isolation voltage and temperature validation beyond industrial specs. |
Compared with ADUM140D0BRZ and ISO6760QDWR, SI8461AA-B-IS1 uniquely balances six-channel integration, 150 Mbps speed, and industrial-grade 2.5 kVRMS isolation in a single narrow-body SOIC - optimizing board area and timing precision for high-performance motor drives and digital power systems.
Availability
SI8461AA-B-IS1 is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for SI8461AA-B-IS1 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 Si84xx family was designed specifically for high-reliability industrial and automotive isolation applications demanding low power, precise timing, and regulatory-compliant galvanic separation - targeting motor drives, power conversion, and data acquisition systems.
FAQ
What is the maximum operating temperature for SI8461AA-B-IS1 at full 150 Mbps data rate?
The SI8461AA-B-IS1 supports continuous operation from –40°C to +125°C at 150 Mbps with 5 V supply and 15 pF load, as verified in Table 3 timing characteristics. This full-speed thermal range enables deployment in under-hood automotive inverters and high-ambient industrial enclosures without derating.
Does SI8461AA-B-IS1 require external startup circuitry or configuration registers?
No, SI8461AA-B-IS1 requires no start-up initialization or configuration registers. It begins transmitting valid data within 40 µs of power application (tSU max), and only needs 0.1 µF VDD bypass capacitors - simplifying design and eliminating firmware dependencies during system boot.
How does the isolation barrier in SI8461AA-B-IS1 compare to optocoupler-based solutions?
The SI8461AA-B-IS1 uses capacitive silicon-dioxide isolation with 2500 VRMS rating, offering 10× faster speed (150 Mbps vs. ~10 Mbps), 100× longer lifetime (>60 years vs. LED degradation), and superior CMTI (25 kV/µs vs. ~10 kV/µs) compared to legacy optocouplers - while consuming less power and occupying less PCB area.
Can SI8461AA-B-IS1 operate with different supply voltages on each side (e.g., 3.3 V on VDD1 and 5 V on VDD2)?
Yes, SI8461AA-B-IS1 supports independent 2.70–5.5 V supplies on VDD1 and VDD2. Electrical specifications including VIH/VIL thresholds, VOH/VOL levels, and timing parameters are guaranteed across all combinations - enabling seamless interfacing between 3.3 V microcontrollers and 5 V analog front-ends.
Is SI8461AA-B-IS1 compliant with RoHS and REACH regulations?
Yes, SI8461AA-B-IS1 is RoHS-compliant and REACH-conformant, as confirmed in Skyworks' official documentation and packaging markings. The narrow-body SOIC package contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances above threshold limits.
SI8461AA-B-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 25ns
- 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
SI8461AA-B-IS1 FAQ
1.How can I place an order for SI8461AA-B-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8461AA-B-IS1 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 SI8461AA-B-IS1 reliable?
The price and inventory of SI8461AA-B-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8461AA-B-IS1 is usually 5 days.
3.What payment methods are accepted for SI8461AA-B-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8461AA-B-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8461AA-B-IS1?
SI8461AA-B-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8461AA-B-IS1 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 SI8461AA-B-IS1?
For technical support, including SI8461AA-B-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8461AA-B-IS1 requirements.
6.How does Aetrix verify that SI8461AA-B-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8461AA-B-IS1 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 SI8461AA-B-IS1 meets industry standards.
7.What is the process for return or replacement of SI8461AA-B-IS1?
All SI8461AA-B-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8461AA-B-IS1, 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 SI8461AA-B-IS1 part is unused and in its original packaging.
Return procedure for SI8461AA-B-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8461AA-B-IS1 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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