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Skyworks Solutions Inc. SI8461BA-A-IS1R
- Part No.:
- SI8461BA-A-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8461BA-A-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
SI8461BA-A-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 <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 side at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power inverters.
For engineers reviewing the SI8461BA-A-IS1R datasheet, SI8461BA-A-IS1R pinout, SI8461BA-A-IS1R application, or SI8461BA-A-IS1R equivalent, this page provides verified timing specs, safety certifications (UL 1577, VDE 0884-2, CSA 5A), isolation parameters (2500 VRMS), and real-world design values for PCB layout, power budgeting, and signal integrity planning.
Technical Context
The SI8461BA-A-IS1R implements capacitive isolation using differential RF signaling across an on-chip SiO₂ barrier, delivering robust noise rejection without magnetic coupling or optoelectronic degradation. Its architecture supports independent primary-side (VDD1) and secondary-side (VDD2) supplies, enabling level-shifting between 2.7 V and 5.5 V domains while maintaining precise timing alignment.
All six channels are unidirectional and individually configurable; the "B" variant denotes high-speed operation (150 Mbps), while the "A" suffix indicates asymmetric channel configuration (e.g., 3 forward + 3 reverse). The device requires no initialization sequence and achieves full functionality within 40 µs of power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables real-time feedback in servo drives and high-frequency PWM gate drivers. |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns latency for closed-loop control timing budgets. |
| Channel-Channel Skew | 0.5 ns typical - preserves phase alignment across multi-signal isolation (e.g., three-phase encoder or ADC sampling). |
| Isolation Voltage | 2500 VRMS (1 min) - meets reinforced insulation requirements for IEC 61010-1 and IEC 60950-1 systems. |
| Supply Range | 2.70–5.5 V per side - supports interoperability with 3.3 V microcontrollers and 5 V analog front-ends. |
| CMTI | 25 kV/µs - prevents data corruption during fast-switching events in SiC/GaN inverter stages. |
| Power @ 100 Mbps | 9.0 mA/VDD1 + 11.3 mA/VDD2 at 5 V - enables low-heat, space-constrained designs in sealed enclosures. |
Pinout & Package
SI8461BA-A-IS1R is housed in a RoHS-compliant 16-pin narrow-body SOIC package (7.5 mm × 10.3 mm, 1.27 mm pitch) with creepage and clearance ≥3.9 mm per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power for input-side logic and channel transmitters; must be bypassed with 0.1 µF ceramic capacitor near pin. |
| GND1 | Primary-side ground | Reference return for VDD1 domain; requires separate low-impedance plane from GND2. |
| IN1–IN3 | Input signals (primary side) | CMOS-compatible inputs accepting 0–VDD1 logic; no external pull-ups required. |
| OUT1–OUT3 | Output signals (secondary side) | Push-pull outputs driving 15 pF loads; 85 Ω nominal output impedance for controlled-impedance trace matching. |
| VDD2 | Secondary-side supply | Independent supply for output-side logic; supports level translation between VDD1 and VDD2 domains. |
| GND2 | Secondary-side ground | Isolated reference for VDD2 domain; galvanically separated from GND1 by SiO₂ barrier. |
| NC | No-connect pins | Pins 4, 5, 12, 13 - internally unused; must remain unconnected and un-bonded in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at speed | 9.0 mA/VDD1 + 11.3 mA/VDD2 at 100 Mbps and 5 V - reduces thermal load in dense industrial modules. |
| Precision timing | 1.5 ns pulse width distortion and 0.5 ns channel-channel skew - maintains signal fidelity in time-critical encoder interfaces. |
| No start-up delay | Valid output within 40 µs of power application - eliminates boot-time synchronization issues in safety-critical systems. |
| High CMTI | 25 kV/µs immunity - sustains reliable operation during 100+ A/µs switching transients in motor drives. |
| Safety-certified isolation | UL 1577 (2500 VRMS), VDE 0884-2 (IEC 60747-5-2), CSA 5A - qualifies for reinforced insulation in Class I equipment. |
Applications
| Industrial Motor Control | Isolated Power Supply Feedback |
|---|---|
|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stacks using SiC MOSFETs. IC Role / Device Role / Timing Role: Six-channel isolator conveying three high-side gate signals and three analog current-sense ADC outputs across isolation barrier. Use Value: Sub-10 ns propagation delay and 0.5 ns skew preserve dead-time accuracy and prevent shoot-through faults. |
Use Scenario: Transmitting error amplifier output and synchronous rectifier timing from secondary to primary side in isolated DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional isolator carrying analog voltage references and digital sync pulses with minimal latency. Use Value: 25 kV/µs CMTI prevents false triggering during transformer ringing and load-step transients. |
| Industrial PLC I/O Modules | EV Battery Management Systems |
|
Use Scenario: Digitally isolating 24 V DC field inputs and relay driver outputs in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Six-channel isolator handling discrete input status and output command signals with independent supply domains. Use Value: 2.7–5.5 V dual-supply flexibility allows direct interface with 3.3 V MCU and 5 V field-side buffers. |
Use Scenario: Isolating cell voltage monitoring and pack contactor control signals in high-voltage battery packs (up to 800 V). IC Role / Device Role / Timing Role: Safety-critical isolator transmitting BMS fault signals and precharge sequencing commands across reinforced barrier. Use Value: UL/VDE/CSA certification and 60-year lifetime at rated working voltage support ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D0BRZ | Quad-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; higher 13.5 mA supply current at 100 Mbps (5 V). | Lacks sixth channel; requires two devices for six-signal isolation, increasing board area and BOM count. | Choose when quad-channel suffices and ADI ecosystem integration is prioritized over channel density. |
| ISO6761DR | Hex-channel, 50 Mbps max, 5000 VRMS, SOIC-16; lower speed but higher isolation rating and 10-year automotive qualification. | Not suitable for >50 Mbps applications (e.g., high-res encoder interfaces); optimized for long-life automotive BMS. | Choose when 5 kVRMS isolation and AEC-Q100 Grade 1 qualification outweigh speed requirements. |
Compared with ADUM141D0BRZ and ISO6761DR, SI8461BA-A-IS1R uniquely balances six-channel density, 150 Mbps speed, sub-10 ns timing, and industrial safety certification in a single SOIC-16 footprint-making it optimal for space-constrained, high-bandwidth motor control and power conversion designs.
Availability
SI8461BA-A-IS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated power supply feedback, and EV battery management systems requiring stable component supply, long-term lifecycle assurance, and certified isolation performance.
Supply support for SI8461BA-A-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-reliability applications.
The Si846x family was designed specifically for industrial and automotive systems demanding high-speed, low-power, and safety-certified galvanic isolation-addressing critical needs in motor drives, power supplies, and battery management where timing precision and noise immunity are non-negotiable.
FAQ
What is the maximum operating temperature for SI8461BA-A-IS1R at full 150 Mbps data rate?
The SI8461BA-A-IS1R supports continuous operation at –40 °C to +125 °C ambient temperature when running at 150 Mbps, provided VDD1 and VDD2 are within 2.70–5.5 V and output loading remains ≤15 pF per channel. This rating is validated per Table 1 in the Rev. 1.6 datasheet and applies to the narrow-body SOIC package under specified thermal conditions.
Does SI8461BA-A-IS1R require external components for basic operation?
No. SI8461BA-A-IS1R requires only 0.1 µF ceramic bypass capacitors on VDD1 and VDD2 pins-no external resistors, transformers, or initialization firmware. Its CMOS architecture eliminates start-up delays, and internal termination ensures compatibility with standard PCB trace impedances without added components.
How does the isolation barrier in SI8461BA-A-IS1R differ from optocoupler-based solutions?
SI8461BA-A-IS1R uses capacitive isolation with differential RF signaling across a silicon-dioxide barrier, offering superior CMTI (25 kV/µs vs. ~15 kV/µs for optocouplers), stable timing over temperature and lifetime, and no LED aging or current-transfer-ratio drift. Unlike optocouplers, it supports bidirectional data flow per channel and consumes significantly less power at high speeds.
Can SI8461BA-A-IS1R operate with different supply voltages on each side (e.g., 3.3 V on VDD1 and 5 V on VDD2)?
Yes. SI8461BA-A-IS1R supports independent VDD1 and VDD2 supplies ranging from 2.70 V to 5.5 V each, enabling seamless level shifting between 3.3 V microcontrollers and 5 V analog circuits. Electrical characteristics-including VIH/VIL thresholds and VOL/VOH levels-are guaranteed across all valid supply combinations per Tables 3–5 in the datasheet.
Is SI8461BA-A-IS1R recommended for new designs?
No. Skyworks has designated the Si8460/61/62/63 family as "Not Recommended for New Designs" (Rev. 1.6, August 2021). While fully supported for existing production and legacy refresh, designers should evaluate Skyworks' newer Si86xx or Si88xx families for new projects requiring extended longevity, enhanced ESD robustness, or updated safety certifications.
SI8461BA-A-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-A-IS1R FAQ
1.How can I place an order for SI8461BA-A-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8461BA-A-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-A-IS1R reliable?
The price and inventory of SI8461BA-A-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-A-IS1R is usually 5 days.
3.What payment methods are accepted for SI8461BA-A-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8461BA-A-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8461BA-A-IS1R?
SI8461BA-A-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8461BA-A-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-A-IS1R?
For technical support, including SI8461BA-A-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8461BA-A-IS1R requirements.
6.How does Aetrix verify that SI8461BA-A-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8461BA-A-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-A-IS1R meets industry standards.
7.What is the process for return or replacement of SI8461BA-A-IS1R?
All SI8461BA-A-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8461BA-A-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-A-IS1R part is unused and in its original packaging.
Return procedure for SI8461BA-A-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8461BA-A-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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