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Skyworks Solutions Inc. SI8451BB-B-IS1R
- Part No.:
- SI8451BB-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8451BB-B-IS1R.pdf
- Description:
- DGTL ISO 2500VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,884
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Product details
Overview
SI8451BB-B-IS1R from Skyworks Solutions is a five-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, 2.7–5.5 V dual supply operation, and 2500 VRMS reinforced isolation. It serves as a high-speed signal barrier in isolated power supplies and motor control interfaces.
For engineers reviewing the SI8451BB-B-IS1R datasheet, SI8451BB-B-IS1R pinout, SI8451BB-B-IS1R application, or SI8451BB-B-IS1R equivalent, this page delivers verified timing specs, safety certifications (UL/CSA/VDE), channel-specific current consumption at 1/10/100 Mbps, and precise skew metrics for real-time industrial communication design.
Technical Context
The SI8451BB-B-IS1R implements capacitive isolation with on-chip RF modulation/demodulation across five independent channels, enabling DC-to-150 Mbps bidirectional data transfer without start-up initialization. Its dual 2.7–5.5 V supplies (VDD1/VDD2) support asymmetric voltage domains and tolerate ±10% variation while maintaining sub-10 ns propagation delay over –40 to +125 °C.
Each channel features 85 Ω nominal output impedance, 25 kV/µs common-mode transient immunity (CMTI), and integrated enable control with 5–8 ns enable-to-data-valid latency. The device achieves 0.5 ns typical channel-to-channel skew and 6 ns minimum pulse width, meeting stringent timing requirements in isolated ADC/DAC and gate driver feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent unidirectional or bidirectional signal isolation paths |
| Max Data Rate | 150 Mbps - supports high-speed serial interfaces like SPI, RS-485, and isolated CAN FD transceivers |
| Propagation Delay | 3.0–9.5 ns - enables sub-10 ns timing-critical feedback in motor control and SMPS |
| Isolation Voltage | 2500 VRMS - certified for reinforced insulation per UL 1577, CSA 5A, and VDE 0884-2 |
| Supply Range | 2.7–5.5 V on both sides - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems |
| Power @ 100 Mbps | 8.6–10.8 mA per side at 5 V - enables low-power isolated communication in battery-backed systems |
| CMTI | 25 kV/µs - ensures robust operation in noisy motor drive and inverter environments |
Pinout & Package
SI8451BB-B-IS1R is housed in a RoHS-compliant 16-pin narrow-body SOIC package (7.5 mm width, 10.3 mm length) with creepage/clearance of 4.01 mm / 4.9 mm and 2.0 pF input-output capacitance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | Primary-side inputs (IN1–IN5) | Accept logic-level signals referenced to VDD1; VIH ≥ 2.0 V, VIL ≤ 0.8 V |
| 6, 7, 8 | Primary-side outputs (OUT1–OUT3) | Drive loads referenced to VDD1; VOH ≥ VDD1–0.4 V, VOL ≤ 0.4 V |
| 9, 10, 11, 12, 13 | Secondary-side inputs (IN1–IN5) | Accept logic-level signals referenced to VDD2; identical thresholds to primary side |
| 14, 15, 16 | Secondary-side outputs (OUT1–OUT3) | Drive loads referenced to VDD2; matched timing and drive strength to primary outputs |
| 16 (shared) | VDD2 | Secondary-side supply pin; bypass capacitor required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 4.1–4.4 mA per side at 1 Mbps / 5 V - reduces thermal load in densely packed industrial PCBs |
| Precision timing | 0.5 ns typical channel-to-channel skew - enables synchronized sampling across multiple isolated ADCs |
| High CMTI | 25 kV/µs - prevents data corruption during fast-switching IGBT/MOSFET transitions in inverters |
| No initialization required | Valid output within 40 µs of power-up - eliminates boot-time delays in safety-critical systems |
| Wide temperature range | –40 to +125 °C at full 150 Mbps - supports under-hood automotive and industrial ambient conditions |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback between MCU and half-bridge IGBTs in servo drives. IC Role / Device Role / Timing Role: Five-channel isolator providing independent high-side/low-side gate drive isolation plus analog current-sense signal isolation. Use Value: Enables 150 Mbps PWM edge fidelity with <9.5 ns propagation delay and 0.5 ns inter-channel skew for precise dead-time control. |
Use Scenario: Isolating feedback signals (voltage/current) from secondary-side sensing to primary-side controller in AC-DC adapters. IC Role / Device Role / Timing Role: Signal isolator bridging primary and secondary domains while maintaining safety-rated 2500 VRMS isolation. Use Value: Delivers 25 kV/µs CMTI and 6 ns minimum pulse width to preserve regulation loop stability under fast load transients. |
| Hybrid Electric Vehicle Inverters | Isolated Data Acquisition Systems |
|
Use Scenario: Transmitting isolated position encoder data and fault signals between traction inverter control board and MCU. IC Role / Device Role / Timing Role: High-reliability digital isolator operating at –40 to +125 °C with 60-year lifetime at rated voltage. Use Value: Supports 150 Mbps encoder interface with 2.7–5.5 V dual-supply flexibility for integration with 3.3 V automotive MCUs. |
Use Scenario: Isolating SPI bus between host processor and isolated ADC/DAC in medical or test equipment. IC Role / Device Role / Timing Role: Five-channel isolator separating digital control and analog measurement domains with reinforced insulation. Use Value: Provides 2.0 pF input-output capacitance and 1012 Ω isolation resistance to prevent noise coupling into precision analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141DARZ | Four-channel, 150 Mbps, 2.5 kVRMS, 3.0–5.5 V supply, 10 ns max propagation delay | Lacks fifth channel; requires external logic for 5-signal isolation | Choose when only four signals need isolation and ADI ecosystem compatibility is preferred |
| ISO6751QDR | Five-channel, 50 Mbps, 5000 VRMS, 1.71–5.5 V supply, 16 ns max propagation delay | Lower speed but higher isolation rating; larger SOIC-16W package | Choose when >2500 VRMS working voltage or extended supply range down to 1.71 V is required |
Compared with ADUM141DARZ and ISO6751QDR, SI8451BB-B-IS1R uniquely balances five-channel count, 150 Mbps speed, sub-10 ns timing, and 2.5 kVRMS certification in a standard narrow SOIC footprint-making it optimal for space-constrained, high-speed industrial isolation where all five signals must be routed with matched latency.
Availability
SI8451BB-B-IS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and hybrid electric vehicle inverters requiring stable component supply and long-term lifecycle support.
Supply support for SI8451BB-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 for wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for high-reliability, low-power digital isolation in harsh environments-targeting applications demanding precise timing, high CMTI, and regulatory compliance across wide temperature ranges.
FAQ
What is the maximum data rate supported by SI8451BB-B-IS1R?
The SI8451BB-B-IS1R supports a maximum data rate of 150 Mbps across all five channels, validated at both 3.3 V and 5 V supply voltages with worst-case propagation delay under 9.5 ns. This performance is guaranteed over the full –40 to +125 °C operating temperature range and applies to both unidirectional and bidirectional configurations of SI8451BB-B-IS1R.
Does SI8451BB-B-IS1R require external startup configuration?
No, SI8451BB-B-IS1R requires no start-up initialization or configuration. Valid output data appears within 40 µs after power is applied to either VDD1 or VDD2, making SI8451BB-B-IS1R suitable for systems requiring deterministic boot behavior and immediate signal integrity upon power-up.
What safety certifications does SI8451BB-B-IS1R hold?
SI8451BB-B-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2), with production-tested withstand voltage of 3000 VRMS for 1 second. These certifications confirm its suitability for reinforced insulation in industrial and automotive applications.
How does SI8451BB-B-IS1R manage power consumption at high data rates?
At 100 Mbps and 5 V supply, SI8451BB-B-IS1R draws 8.6–10.8 mA per side (VDD1/VDD2), totaling ~21.6 mA typical. This ultra-low-power profile is achieved via optimized RF modulation and low-capacitance internal structures, enabling efficient operation in thermally constrained designs without compromising 150 Mbps capability.
What is the channel-to-channel skew specification for SI8451BB-B-IS1R?
The SI8451BB-B-IS1R specifies a typical channel-to-channel skew of 0.5 ns and a maximum of 1.8 ns over temperature and voltage, measured between any two output channels driven from the same side. This tight skew enables synchronous sampling across multiple isolated sensors or actuators in SI8451BB-B-IS1R-based systems.
SI8451BB-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:
- 5
- Inputs - Side 1/Side 2:
- 4/1
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI8451BB-B-IS1R FAQ
1.How can I place an order for SI8451BB-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8451BB-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 SI8451BB-B-IS1R reliable?
The price and inventory of SI8451BB-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 SI8451BB-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8451BB-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8451BB-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8451BB-B-IS1R?
SI8451BB-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8451BB-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 SI8451BB-B-IS1R?
For technical support, including SI8451BB-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8451BB-B-IS1R requirements.
6.How does Aetrix verify that SI8451BB-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8451BB-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 SI8451BB-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8451BB-B-IS1R?
All SI8451BB-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8451BB-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 SI8451BB-B-IS1R part is unused and in its original packaging.
Return procedure for SI8451BB-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8451BB-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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