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Skyworks Solutions Inc. SI8450BA-B-IS1R
- Part No.:
- SI8450BA-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8450BA-B-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,133
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Product details
Overview
SI8450BA-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 for industrial motor control and isolated power supply interfaces.
For engineers reviewing the SI8450BA-B-IS1R datasheet, SI8450BA-B-IS1R pinout, SI8450BA-B-IS1R application, or SI8450BA-B-IS1R equivalent, this page delivers verified timing specs, safety certifications (UL/CSA/VDE), channel-channel skew (≤1.8 ns), CMTI (25 kV/µs), and supply current at 100 Mbps (≤30 mA total) - all critical for high-speed isolated gate drive and ADC/DAC interface design.
Technical Context
The SI8450BA-B-IS1R implements capacitive digital isolation using on-chip RF modulation/demodulation across a silicon dioxide barrier, enabling DC-to-150 Mbps signal transmission without start-up initialization. It features independent enable-controlled channels with tri-state outputs and supports asymmetric dual-supply operation (VDD1 ≠ VDD2).
Its architecture delivers precise timing: typical pulse width distortion ≤1.5 ns, channel-channel skew ≤0.5 ns (typ), and propagation delay skew ≤3.0 ns (max), making it suitable for synchronous multi-channel isolation in servo drives and isolated feedback loops where deterministic latency matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 unidirectional isolated channels - enables full isolation of control, feedback, and status signals in compact motor driver PCB layouts. |
| Max Data Rate | 150 Mbps - supports high-resolution PWM sampling and fast serial communication (e.g., isolated SPI clock lines). |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns latency for real-time gate drive timing in SiC/GaN inverters. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA 5A, and VDE 0884-2, meeting IEC 61800-5-1 requirements. |
| Supply Voltage Range | 2.7–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V gate drivers without level-shifting. |
| CMTI | 25 kV/µs - rejects fast common-mode transients in noisy power electronics environments (e.g., IGBT switching noise). |
| Channel-Channel Skew | ≤1.8 ns (max) - maintains tight timing alignment across multiple isolated signals in encoder or resolver interfaces. |
Pinout & Package
SI8450BA-B-IS1R is housed in a 16-pin narrow-body SOIC (SOIC-16 NB) package with 1.27 mm pitch, 10.3 mm × 6.4 mm footprint, and 2.35 mm height. Pin 1 marked by notch or dot; pins 1–8 form primary-side interface, pins 9–16 secondary-side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power for input-side logic and channel transmitters; accepts 2.7–5.5 V with bypass capacitor required. |
| GND1 | Primary-side ground | Reference for VDD1 and input signals; must be separated from GND2 by isolation barrier. |
| IN1–IN5 | Input signal terminals | CMOS-compatible inputs accepting 0–VDD1 logic; no external pull-ups needed. |
| EN1–EN5 | Channel enable inputs | Active-high enables; driving low forces corresponding output into high-impedance state. |
| VDD2 | Secondary-side supply | Independent supply for output-side logic; may differ from VDD1 (e.g., 3.3 V / 5 V dual-rail). |
| GND2 | Secondary-side ground | Reference for VDD2 and outputs; galvanically isolated from GND1. |
| OUT1–OUT5 | Isolated output terminals | CMOS outputs with 85 Ω nominal impedance; require controlled-impedance routing above 50 Mbps. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power at 100 Mbps | ≤30 mA total supply current (VDD1 + VDD2) at 5 V - reduces thermal load in densely packed inverters. |
| No start-up initialization | Valid output within 40 µs of power-on - eliminates boot-time uncertainty in safety-critical systems. |
| Precision timing | ≤1.5 ns pulse width distortion and ≤0.5 ns typical channel-channel skew - preserves signal integrity in high-fidelity isolated feedback paths. |
| High CMTI immunity | 25 kV/µs common-mode transient rejection - prevents false triggering during fast dV/dt events in 650 V+ systems. |
| RoHS-compliant SOIC-16 NB | Standard surface-mount package with 4.9 mm clearance and 4.01 mm creepage - meets IPC-2221B Class B spacing rules. |
Applications
| Industrial Motor Drives | Isolated Switch-Mode Power Supplies |
|---|---|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase IGBT/SiC inverter stages. IC Role / Device Role / Timing Role: Five-channel isolator transmitting gate enable, fault signals, and analog feedback across isolation barrier with <10 ns propagation delay. Use Value: Enables precise dead-time control and fast overcurrent response (<100 ns loop time) while maintaining reinforced insulation. |
Use Scenario: Providing isolated feedback for voltage regulation and primary-side sensing in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronous rectifier timing across isolation boundary with minimal skew. Use Value: Supports >1 MHz switching frequencies with stable regulation due to <2.5 ns pulse width distortion and 25 kV/µs CMTI. |
| Isolated ADC/DAC Interfaces | Hybrid Electric Vehicle Battery Management |
Use Scenario: Isolating serial interface (SPI) between MCU and isolated precision ADC measuring shunt-based current/voltage. IC Role / Device Role / Timing Role: Transmitting clock, data, and chip-select signals with matched channel delays to preserve SPI timing margins. Use Value: Maintains 150 Mbps SPI SCLK integrity with ≤1.8 ns channel-channel skew, enabling 18-bit ADC throughput without resynchronization. |
Use Scenario: Isolating cell voltage monitoring and contactor control signals in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: Five-channel isolation of pack-level status, temperature, and precharge control with reinforced 2500 VRMS rating. Use Value: Meets ISO 6469-3 functional safety requirements via VDE-certified reinforced insulation and 60-year lifetime at rated voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D0BRZ | 4-channel, 150 Mbps, 2.5 kVRMS, SOIC-16; higher typical supply current (34 mA @ 100 Mbps, 5 V) | Lacks fifth channel; requires external logic for 5-signal isolation | Choose when only four isolated signals needed and ADI ecosystem preferred. |
| ISO6741FDWR | 4-channel, 50 Mbps, 5 kVRMS, SOIC-16; lower speed but higher isolation rating | Insufficient for >100 Mbps SPI or PWM edge timing; better for low-speed BMS monitoring | Choose when 5 kVRMS working voltage is mandatory and data rate ≤50 Mbps suffices. |
Compared with ADUM141D0BRZ and ISO6741FDWR, SI8450BA-B-IS1R uniquely provides five 150 Mbps channels in a single SOIC-16 package with lowest power at high speed and best-in-class timing precision - essential for space-constrained, high-performance motor and power systems.
Availability
SI8450BA-B-IS1R 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 support.
Supply support for SI8450BA-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, with leadership in RF, timing, and isolation technologies.
The Si84xx family was designed specifically for high-reliability, high-speed digital isolation in industrial automation, EV traction inverters, and isolated power conversion - emphasizing low power, precise timing, and safety certification compliance.
FAQ
What is the maximum operating temperature for SI8450BA-B-IS1R at 150 Mbps?
The SI8450BA-B-IS1R operates from –40 °C to +125 °C ambient temperature at full 150 Mbps data rate with 15 pF load and 5 V supply. Thermal derating applies above 125 °C case temperature per DIN EN 60747-5-2; maximum junction temperature remains 150 °C. SI8450BA-B-IS1R maintains timing specs across this range without calibration.
Does SI8450BA-B-IS1R require external components for basic operation?
No. SI8450BA-B-IS1R requires only 0.1 µF bypass capacitors on VDD1 and VDD2 - no external resistors, transformers, or level shifters. Its integrated RF isolation core eliminates startup initialization, and CMOS-compatible I/Os accept standard logic levels. SI8450BA-B-IS1R is fully functional with just power, ground, and signal connections.
How does the enable function work on SI8450BA-B-IS1R?
Each of the five channels has a dedicated active-high enable input (EN1–EN5). When an ENx pin is driven low, its corresponding OUTx enters high-impedance state; when high, OUTx follows INx with specified propagation delay. Enable-to-data-valid delay is ≤8.0 ns. SI8450BA-B-IS1R supports independent channel gating for dynamic power management.
Is SI8450BA-B-IS1R certified for reinforced insulation in medical applications?
SI8450BA-B-IS1R holds UL 1577, CSA Component Notice 5A, and VDE 0884-2 certifications for 2500 VRMS reinforced insulation, covering IEC 60950-1 and IEC 61010-1. While not specifically certified to IEC 60601-1, its 560 Vpeak working voltage (VIORM) and 60-year lifetime meet key isolation requirements for non-invasive medical power supplies and patient-monitoring auxiliary circuits.
What is the output impedance of SI8450BA-B-IS1R and how should it be terminated?
SI8450BA-B-IS1R has a nominal output impedance of 85 Ω ±40%, formed by on-chip series termination and driver FET resistance. For signal integrity above 50 Mbps, PCB traces to loads should be controlled-impedance (e.g., 85 Ω single-ended) and terminated at the receiver. SI8450BA-B-IS1R does not require external series resistors unless trace impedance deviates significantly from 85 Ω.
SI8450BA-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:
- 5/0
- 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
SI8450BA-B-IS1R FAQ
1.How can I place an order for SI8450BA-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8450BA-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 SI8450BA-B-IS1R reliable?
The price and inventory of SI8450BA-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 SI8450BA-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8450BA-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450BA-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8450BA-B-IS1R?
SI8450BA-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8450BA-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 SI8450BA-B-IS1R?
For technical support, including SI8450BA-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450BA-B-IS1R requirements.
6.How does Aetrix verify that SI8450BA-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8450BA-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 SI8450BA-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8450BA-B-IS1R?
All SI8450BA-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8450BA-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 SI8450BA-B-IS1R part is unused and in its original packaging.
Return procedure for SI8450BA-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8450BA-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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