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Skyworks Solutions Inc. SI8431BB-D-YS0
- Part No.:
- SI8431BB-D-YS0
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8431BB-D-YS0.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
SI8431BB-D-YS0 from Skyworks Solutions is a triple-channel, ultra-low-power digital isolator in a 16-pin wide-body SOIC package, supporting up to 150 Mbps data rate with <9.5 ns worst-case propagation delay and 0.5 ns typical channel-to-channel skew. It operates across 2.70–5.5 V supply rails and delivers <7.0 mA per channel at 100 Mbps (5 V), enabling high-speed isolated communication in motor control and industrial power inverters.
For engineers reviewing the SI8431BB-D-YS0 datasheet, SI8431BB-D-YS0 pinout, SI8431BB-D-YS0 application, or SI8431BB-D-YS0 equivalent, this page provides verified timing specs, isolation safety certifications (UL, CSA, VDE), supply current behavior at 2.7 V/3.3 V/5 V, and precise skew/pulse-width distortion values critical for real-time control loop integrity.
Technical Context
The SI8431BB-D-YS0 implements capacitive isolation with on-chip RF modulation/demodulation, delivering reinforced insulation rated to 2500 VRMS and 560 Vpeak working voltage. Its architecture supports independent primary-side and secondary-side supply domains (VDD1/VDD2), enabling level-shifting between 2.7 V and 5.5 V logic without external level translators.
It features an active enable input (EN) that places outputs in high-impedance state within 9.2 ns (ten2), and achieves 25 kV/µs common-mode transient immunity (CMTI) - essential for gate-driver feedback paths in noisy inverter environments. All timing parameters are guaranteed over –40 to +125 °C at full 150 Mbps operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 3 unidirectional isolated channels - enables isolated SPI bus or dual PWM + fault feedback in compact space-constrained designs. |
| Data Rate | Up to 150 Mbps - supports high-resolution encoder interfaces and fast ADC/DAC isolation in servo drives. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures sub-10 ns timing predictability for closed-loop control cycles requiring <100 ns jitter budgets. |
| Channel-Channel Skew | 0.5–1.8 ns (typ/max) - maintains phase alignment across three isolated signals, critical for multi-phase motor commutation timing. |
| Supply Voltage Range | 2.70–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without LDOs or level shifters. |
| Isolation Rating | 2500 VRMS (1 min) - certified to UL 1577, CSA Component Notice 5A, and VDE IEC 60747-5-2 for reinforced insulation in industrial equipment. |
| CMTI | 25 kV/µs - rejects fast transients from IGBT switching noise, preventing false triggering in isolated feedback paths. |
| Power @ 100 Mbps | 7.0 mA (VDD1) / 11.0 mA (VDD2) at 5 V - enables low-heat, fanless operation in sealed enclosures with tight thermal budgets. |
Pinout & Package
SI8431BB-D-YS0 is housed in a 16-pin wide-body SOIC package (WB-SOIC-16) with 8.0 mm minimum creepage/clearance, optimized for 2500 VRMS reinforced insulation compliance. Pin pitch is 1.27 mm; body width is 7.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Primary-side inputs/outputs and supplies | Pins 1–4: Channel A/B/C inputs (INx); Pins 5–6: VDD1 and GND1; Pins 7–8: EN and NC - define left-side signal domain. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Secondary-side inputs/outputs and supplies | Pins 9–11: Channel A/B/C outputs (OUTx); Pins 12–13: VDD2 and GND2; Pins 14–16: NC - define right-side isolated domain. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Valid output data available within 40 µs of power application - eliminates boot-time delays in safety-critical systems. |
| Ultra-low power at 1 Mbps | <1.7 mA (VDD1) / <2.0 mA (VDD2) at 5 V - reduces standby power in battery-backed or energy-harvesting applications. |
| Pulse width distortion | 1.5 ns typical - preserves duty-cycle fidelity for PWM isolation, avoiding distortion-induced torque ripple in motor drives. |
| 60-year life at rated voltage | Guaranteed reliability under continuous 2500 VRMS stress - meets long-lifecycle requirements for industrial infrastructure. |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - validates suitability for hybrid electric vehicle traction inverter subsystems. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating PWM gate-drive signals and current-sense feedback in 3-phase BLDC inverters. IC Role / Device Role / Timing Role: Triple-channel isolator providing synchronized, low-skew gate drive enable and analog feedback isolation. Use Value: 0.5 ns channel-channel skew and 25 kV/µs CMTI prevent shoot-through and false fault trips during high-dV/dt switching. |
Use Scenario: Isolating primary-side controller signals (PWM, enable) and secondary-side voltage/current telemetry in LLC resonant converters. IC Role / Device Role / Timing Role: High-speed digital isolator enabling fast-loop feedback with minimal latency across isolation barrier. Use Value: 9.5 ns max propagation delay and 6 ns minimum pulse width support >1 MHz switching frequencies without timing degradation. |
| Isolated Data Acquisition | Hybrid Electric Vehicle Inverter |
|
Use Scenario: Isolating serial interface lines (SPI clock/data) between isolated ADCs and host MCU in high-voltage battery monitoring units. IC Role / Device Role / Timing Role: Three-channel isolator carrying SCLK, SDI, and SDO with matched delay paths. Use Value: 1.5 ns pulse width distortion preserves SPI timing margins at 50+ MHz clock rates, ensuring reliable data capture. |
Use Scenario: Isolating DC-link voltage sensing, temperature feedback, and fault reporting in automotive traction inverters. IC Role / Device Role / Timing Role: Reinforced-isolation interface for safety-critical signals meeting ISO 26262 ASIL-B requirements. Use Value: UL/CSA/VDE certification and AEC-Q100 Grade 1 qualification confirm compliance with automotive functional safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1310BRWZ | 3-channel, 100 Mbps max, 30 ns max propagation delay, 2.5 kVRMS isolation, SOIC-16 narrow body | Lower data rate and higher delay limit use in <50 MHz control loops; narrower creepage (4.01 mm) restricts use in higher pollution-degree environments | Preferred where cost sensitivity outweighs speed/skew requirements and board space is constrained |
| ISO6731FDWR | 3-channel, 50 Mbps max, 25 ns max propagation delay, 5000 VRMS isolation, SOIC-16 wide body | Higher isolation rating but lower speed; larger internal capacitance (3.7 pF) increases dynamic power at high frequencies | Selected when system-level surge withstand >3.6 kVRMS is mandated, even at reduced data throughput |
Compared with ADUM1310BRWZ and ISO6731FDWR, SI8431BB-D-YS0 uniquely balances 150 Mbps bandwidth, sub-10 ns delay, and 0.5 ns skew in a safety-certified wide-body package - making it optimal for high-fidelity real-time control where timing precision and noise immunity are co-critical.
Availability
SI8431BB-D-YS0 is available at Aetrix Electronics and suitable for industrial motor control, isolated SMPS, and hybrid electric vehicle inverter designs requiring stable component supply, long-term lifecycle assurance, and certified reinforced isolation.
Supply support for SI8431BB-D-YS0 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, high-speed digital isolation in industrial, automotive, and energy infrastructure applications - emphasizing low power, precise timing, and robust safety certification.
FAQ
What is the maximum operating temperature for SI8431BB-D-YS0 at full 150 Mbps data rate?
The SI8431BB-D-YS0 is fully specified for operation from –40 °C to +125 °C at 150 Mbps with 15 pF load and 5 V supply. This rating applies to both VDD1 and VDD2 domains simultaneously and is validated per Table 1 in the datasheet Rev. 1.7. Derating is not required within this range, making SI8431BB-D-YS0 suitable for under-hood automotive and high-ambient industrial environments.
Does SI8431BB-D-YS0 support independent supply voltages on each side?
Yes, SI8431BB-D-YS0 supports fully independent VDD1 (pins 5,6) and VDD2 (pins 12,13) supplies ranging from 2.70 V to 5.5 V. This enables seamless level translation - for example, interfacing a 3.3 V MCU on the primary side with a 5 V gate driver on the secondary side - without external level-shifting circuitry. The device maintains full timing and isolation specifications across all valid supply combinations.
What safety certifications apply to SI8431BB-D-YS0?
SI8431BB-D-YS0 carries UL 1577 recognition (2500 VRMS, 1 min), CSA Component Notice 5A (IEC 60950-1/61010-1 reinforced insulation), and VDE IEC 60747-5-2 certification. These cover reinforced insulation up to 560 Vpeak working voltage and are production-tested to 3.0 kVRMS for 1 second. Certification documentation is filed under UL E257455, CSA 232873, and VDE 5006301-4880-0001.
How does the enable pin (EN) function on SI8431BB-D-YS0?
The EN pin (pin 7) controls output state: when pulled high, outputs reflect input states; when pulled low, all three outputs enter high-impedance tri-state mode within 9.2 ns (ten2). This feature enables hot-swap capability and safe power sequencing in modular systems. EN is referenced to VDD1 and requires no external pull-up; internal bias ensures defined state during power-up.
Is SI8431BB-D-YS0 pin-compatible with other Si843x variants?
SI8431BB-D-YS0 shares the same WB-SOIC-16 pinout with all Si843xBx variants (e.g., SI8431AB-D-YS0, SI8431CB-D-YS0), differing only in channel direction configuration (all unidirectional, B = forward-only). It is not pin-compatible with Si843xAx (1 Mbps) or Si8435x (5-channel) variants due to different internal routing and enable functionality. Always verify channel mapping against the specific ordering code.
SI8431BB-D-YS0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8431BB-D-YS0 FAQ
1.How can I place an order for SI8431BB-D-YS0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8431BB-D-YS0 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 SI8431BB-D-YS0 reliable?
The price and inventory of SI8431BB-D-YS0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8431BB-D-YS0 is usually 5 days.
3.What payment methods are accepted for SI8431BB-D-YS0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8431BB-D-YS0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8431BB-D-YS0?
SI8431BB-D-YS0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8431BB-D-YS0 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 SI8431BB-D-YS0?
For technical support, including SI8431BB-D-YS0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8431BB-D-YS0 requirements.
6.How does Aetrix verify that SI8431BB-D-YS0 is sourced from the original manufacturer or authorized distributors?
All SI8431BB-D-YS0 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 SI8431BB-D-YS0 meets industry standards.
7.What is the process for return or replacement of SI8431BB-D-YS0?
All SI8431BB-D-YS0 units undergo pre-shipment inspection (PSI). If there is an issue with SI8431BB-D-YS0, 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 SI8431BB-D-YS0 part is unused and in its original packaging.
Return procedure for SI8431BB-D-YS0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8431BB-D-YS0 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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