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Skyworks Solutions Inc. SI8461BA-A-IS1
- Part No.:
- SI8461BA-A-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8461BA-A-IS1.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
SI8461BA-A-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 under 9.5 ns and channel-to-channel skew as low as 0.5 ns. 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 systems.
For engineers reviewing the SI8461BA-A-IS1 datasheet, SI8461BA-A-IS1 pinout, SI8461BA-A-IS1 application, or SI8461BA-A-IS1 equivalent, this device is critical for designs requiring reinforced insulation (2500 VRMS), high CMTI (25 kV/µs), precise timing stability over –40 to +125 °C, and minimal power consumption in space-constrained isolation barriers.
Technical Context
The SI8461BA-A-IS1 implements capacitive isolation with on-chip RF modulation/demodulation circuitry, delivering deterministic timing performance without external clocking or initialization. Its six independent bidirectional channels support asymmetric voltage operation (VDD1 ≠ VDD2) and tolerate wide common-mode transients.
It meets reinforced insulation requirements per IEC 60747-5-2 (VDE), UL 1577, and CSA Component Notice 5A, with certified 2500 VRMS withstand voltage and 60-year lifetime at rated working voltage. The device requires only VDD bypass capacitors-no external components for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - enables high-speed serial interfaces (e.g., isolated SPI, RS-485 PHY control, PWM feedback) |
| Propagation Delay | 3.0–9.5 ns (typ/max) - supports sub-10 ns timing-critical gate drive and ADC sampling synchronization |
| Channel-Channel Skew | 0.5–1.8 ns (typ/max) - ensures matched edge alignment across all six channels for multi-signal isolation |
| Supply Voltage Range | 2.70–5.5 V per side - allows interoperability with 3.3 V logic and 5 V microcontrollers without level shifters |
| CMTI | 25 kV/µs minimum - maintains signal integrity in noisy motor drive and inverter environments |
| Isolation Withstand | 2500 VRMS (1 min) - certified for reinforced insulation in industrial and automotive auxiliary systems |
| Operating Temperature | –40 to +125 °C - validated for full 150 Mbps operation across automotive under-hood and industrial ambient ranges |
Pinout & Package
SI8461BA-A-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 internal isolation barrier rated for 2500 VRMS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power supply | Supplies power to input-side logic and isolation transmitter; accepts 2.70–5.5 V |
| GND1 | Primary-side ground reference | Reference for input signals and VDD1; must be separated from GND2 by isolation barrier |
| IN1–IN3 | Input signal terminals (side 1) | Accept CMOS/TTL-compatible digital inputs; VIH ≥2.0 V, VIL ≤0.8 V |
| OUT1–OUT3 | Output signal terminals (side 2) | Drive CMOS loads up to 10 mA; VOH ≥VDD2–0.4 V, VOL ≤0.4 V |
| VDD2 | Secondary-side power supply | Supplies power to output-side logic and isolation receiver; independent of VDD1 |
| GND2 | Secondary-side ground reference | Reference for output signals and VDD2; galvanically isolated from GND1 |
| IN4–IN6 | Input signal terminals (side 1) | Additional three inputs on primary side - enables full six-channel unidirectional configuration |
| OUT4–OUT6 | Output signal terminals (side 2) | Corresponding outputs for IN4–IN6; supports mixed-direction channel mapping per design |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Valid output within 40 µs of power application - eliminates boot-time delays in safety-critical systems |
| Ultra-low power at 100 Mbps | 9.0 mA per side (5 V) - reduces thermal load and enables use in thermally constrained enclosures |
| Pulse width distortion | 1.5 ns typical - preserves duty cycle fidelity for PWM and clock distribution applications |
| Output impedance | 85 Ω ±40% - matches standard PCB trace impedances to minimize reflections at 150 Mbps |
| 60-year life at rated voltage | Validated MTTF under accelerated stress - supports long-lifecycle industrial and infrastructure deployments |
Applications
| Industrial Motor Drives | Isolated Switch-Mode Power Supplies |
|---|---|
Use Scenario: Isolating gate driver control signals and current sense feedback between MCU and IGBT/SiC half-bridge in servo drives. IC Role / Device Role / Timing Role: Six-channel digital isolator providing independent, low-skew paths for PWM, fault reporting, and enable signals across isolation barrier. Use Value: Enables <9.5 ns propagation delay and <1.8 ns channel skew to maintain tight dead-time control and prevent shoot-through. | Use Scenario: Isolating feedback signals (voltage, current, temperature) and control commands in 1–3 kW AC/DC converters. IC Role / Device Role / Timing Role: Bidirectional isolation of analog-to-digital interface lines and digital control status between primary and secondary sides. Use Value: 25 kV/µs CMTI prevents false triggering during fast-switching events; 2.7–5.5 V dual-supply operation simplifies auxiliary rail design. |
| Hybrid Electric Vehicle Battery Management | Isolated Data Acquisition Systems |
Use Scenario: Communicating cell voltage monitoring data and balancing commands across high-voltage battery stack sections (e.g., 400–800 V DC). IC Role / Device Role / Timing Role: Six-channel isolator routing UART, SPI, and GPIO signals between isolated BMS controller domains. Use Value: 2500 VRMS reinforced insulation and –40 to +125 °C rating meet automotive ASIL-B functional safety requirements. | Use Scenario: Isolating high-resolution ADC/DAC interfaces in programmable logic controllers and test equipment. IC Role / Device Role / Timing Role: Transmitting synchronized sample clocks and conversion data across isolation boundary with sub-nanosecond skew. Use Value: 0.5 ns typical channel-channel skew and 6 ns minimum pulse width preserve timing integrity for 16+ bit precision sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRIZ | Four-channel, 150 Mbps, 2.7–5.5 V, 2500 VRMS; lacks sixth channel and 125 °C rating | Suitable for 4-signal isolation only; not drop-in for six-channel layouts or extended temperature needs | Select when board space or cost constraints prioritize four channels and ambient ≤105 °C |
| ISO6760DR | Six-channel, 50 Mbps max, 1.71–5.5 V, 5000 VRMS; higher isolation rating but lower speed and no 125 °C spec | Preferred for ultra-high-isolation safety-critical systems where data rate ≤50 Mbps suffices | Choose when 5000 VRMS working voltage is mandatory and timing skew <1 ns is not required |
Compared with ADUM140D0BRIZ and ISO6760DR, SI8461BA-A-IS1 uniquely combines six-channel count, 150 Mbps speed, 125 °C operation, and 2500 VRMS certification-making it optimal for compact, high-performance industrial and automotive isolation where channel density and thermal margin are critical.
Availability
SI8461BA-A-IS1 is available at Aetrix Electronics and suitable for industrial motor drives, isolated switch-mode power supplies, and hybrid electric vehicle battery management systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SI8461BA-A-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, low-power digital isolation in industrial automation, energy infrastructure, and automotive subsystems-replacing optocouplers with superior speed, longevity, and temperature stability.
FAQ
What is the maximum data rate supported by SI8461BA-A-IS1?
The SI8461BA-A-IS1 supports a maximum data rate of 150 Mbps under specified conditions (VDD = 5 V, TA = –40 to +125 °C). This is confirmed in Table 3 and Table 4 of the Skyworks datasheet Rev. 1.6 for the "Bx" variant, which SI8461BA-A-IS1 belongs to. The device maintains timing integrity-including propagation delay skew below 3 ns-up to this rate.
Does SI8461BA-A-IS1 require external components for basic operation?
No, SI8461BA-A-IS1 requires only VDD bypass capacitors (typically 0.1 µF ceramic per supply pin) for stable operation. The datasheet explicitly states "only VDD bypass capacitors are required," and no external resistors, clocks, or initialization sequences are needed. This simplifies layout and reduces BOM count compared to legacy isolators.
What safety certifications apply to SI8461BA-A-IS1?
SI8461BA-A-IS1 is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. These cover reinforced insulation up to 2500 VRMS for 1 minute, with production testing at 3000 VRMS. Certification documentation is referenced in Skyworks' datasheet Table 6 and applies directly to the SI8461BA-A-IS1 narrow-body SOIC variant.
Can SI8461BA-A-IS1 operate with different supply voltages on each side?
Yes, SI8461BA-A-IS1 supports independent VDD1 and VDD2 supplies ranging from 2.70 V to 5.5 V each. This allows interfacing between 3.3 V microcontrollers and 5 V peripherals-or mixed-voltage domains-without external level shifters. Electrical characteristics in Tables 3–5 confirm operation across VDD1/VDD2 combinations including 2.7 V/5.5 V.
Is SI8461BA-A-IS1 recommended for new designs?
No-Skyworks explicitly marks the Si8460/61/62/63 family as "Not Recommended for New Designs" in Rev. 1.6 of the datasheet (August 2021). While fully functional and supported, designers should evaluate Skyworks' newer Si86xx or Si88xx families for enhanced performance, extended lifecycle, or updated qualification. SI8461BA-A-IS1 remains available for legacy support and existing production.
SI8461BA-A-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:
- 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-IS1 FAQ
1.How can I place an order for SI8461BA-A-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8461BA-A-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 SI8461BA-A-IS1 reliable?
The price and inventory of SI8461BA-A-IS1 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-IS1 is usually 5 days.
3.What payment methods are accepted for SI8461BA-A-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8461BA-A-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8461BA-A-IS1?
SI8461BA-A-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8461BA-A-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 SI8461BA-A-IS1?
For technical support, including SI8461BA-A-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8461BA-A-IS1 requirements.
6.How does Aetrix verify that SI8461BA-A-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8461BA-A-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 SI8461BA-A-IS1 meets industry standards.
7.What is the process for return or replacement of SI8461BA-A-IS1?
All SI8461BA-A-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8461BA-A-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 SI8461BA-A-IS1 part is unused and in its original packaging.
Return procedure for SI8461BA-A-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8461BA-A-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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