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Skyworks Solutions Inc. SI8450BB-A-IS1R
- Part No.:
- SI8450BB-A-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8450BB-A-IS1R.pdf
- Description:
- DGTL ISO 2500VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,948
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Product details
Overview
SI8450BB-A-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-reliability signal barrier in isolated power supplies and motor control interfaces.
For engineers reviewing the SI8450BB-A-IS1R datasheet, SI8450BB-A-IS1R pinout, SI8450BB-A-IS1R application, or SI8450BB-A-IS1R equivalent, key selection criteria include channel count (5), isolation rating (2500 VRMS), timing precision (0.5 ns typical channel-channel skew), low-power operation at 100 Mbps (<30 mA total), and compatibility with industrial temperature range (–40 to +125 °C).
Technical Context
The SI8450BB-A-IS1R implements capacitive isolation using on-chip RF modulation/demodulation across a silicon dioxide barrier, enabling DC-to-150 Mbps bidirectional signal transmission without start-up initialization. Its architecture delivers stable timing performance across voltage (2.7–5.5 V) and temperature (–40 to +125 °C) extremes, with CMTI ≥25 kV/µs ensuring robustness in noisy power electronics environments.
Each of its five isolated channels features independent enable control, 85 Ω nominal output impedance for controlled-impedance PCB routing, and precise timing specs: 1.5 ns typical pulse width distortion, 6 ns minimum pulse width, and 2 ns propagation delay skew between channels - critical for synchronized gate driving and ADC sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500 VRMS (UL/CSA/VDE certified; 3600 VRMS max test voltage) |
| Data Rate | Up to 150 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and PWM feedback loops |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical isolation in motor gate drivers |
| Supply Voltage Range | 2.70–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog circuits |
| Power Consumption | <30 mA total at 100 Mbps (5 V), <21 mA at 100 Mbps (3.3 V) - reduces thermal load in dense PCB layouts |
| Channel-Channel Skew | 0.5–1.8 ns (typ/max) - ensures deterministic phase alignment across multiple isolated signals |
| Common-Mode Transient Immunity | ≥25 kV/µs - maintains signal integrity during fast-switching events in inverters and SMPS |
Pinout & Package
SI8450BB-A-IS1R is housed in a RoHS-compliant 16-pin narrow-body SOIC (SOIC-16 NB) package with 1.27 mm pitch, 10.3 mm × 7.5 mm footprint, and 2.35 mm height. Pin 1 is marked by a beveled corner or dot; pins 1–8 form the primary-side interface, pins 9–16 the secondary-side interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Provides 2.7–5.5 V power to input-side logic and isolation transmitter; bypass capacitor required |
| GND1 | Primary-side ground | Reference for input signals and VDD1; must be separated from GND2 by isolation barrier |
| INx | Primary-side digital input (x = 1–5) | Accepts CMOS-level signals; VIH ≥2.0 V, VIL ≤0.8 V; no external pull-ups needed |
| ENx | Primary-side enable input (x = 1–5) | Active-high control per channel; outputs go high-impedance when ENx = low (Revision B) |
| VDD2 | Secondary-side supply | Independent 2.7–5.5 V supply for output-side logic and receiver; decoupling mandatory |
| GND2 | Secondary-side ground | Reference for isolated outputs; galvanically separated from GND1 per safety certification |
| OUTx | Secondary-side digital output (x = 1–5) | CMOS-compatible outputs; VOH ≥VDD2–0.4 V, VOL ≤0.4 V; 85 Ω series termination integrated |
Key Features
| Feature | Design Value |
|---|---|
| Five independent isolation channels | Enables full isolation of multi-signal interfaces (e.g., 3-phase PWM + fault + enable) in single-package layout |
| No start-up initialization | Delivers valid output within 40 µs of power application - eliminates boot-time delays in safety-critical systems |
| Ultra-low power at high speed | Consumes only ~4.6 mA per side at 100 Mbps (5 V), reducing heat generation in thermally constrained enclosures |
| Precision timing performance | 0.5 ns typical channel-channel skew and 1.5 ns pulse width distortion support synchronous sampling in isolated ADCs |
| Reinforced insulation certification | UL 1577, CSA 5A, and VDE 0884-2 compliance ensures suitability for medical, industrial, and EV applications requiring 2500 VRMS isolation |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
|
Use Scenario: Isolating gate drive signals and current-sense feedback in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: Five-channel barrier transmitting PWM, enable, fault, and analog feedback signals across isolation boundary with sub-10 ns timing fidelity. Use Value: Enables compact, high-efficiency motor drives by eliminating optocoupler latency and aging, while maintaining 2500 VRMS working voltage compliance. |
Use Scenario: Providing isolated feedback path and auxiliary power sequencing in 1–3 kW AC/DC converters. IC Role / Device Role / Timing Role: Isolating error amplifier output, overvoltage/overcurrent flags, and synchronous rectifier control signals between primary and secondary sides. Use Value: Replaces multiple discrete optocouplers and transformers, reducing BOM count and improving transient response via 25 kV/µs CMTI. |
| Hybrid Electric Vehicle Battery Management | Isolated Data Acquisition Systems |
|
Use Scenario: Interfacing cell voltage monitors and contactor control logic across high-voltage battery pack domains (e.g., 400–800 V DC bus). IC Role / Device Role / Timing Role: Transmitting precise voltage measurement data and isolation-enabled relay commands with 0.5 ns inter-channel alignment. Use Value: Meets automotive ASIL-B functional safety requirements through certified 2500 VRMS isolation and 60-year lifetime at rated voltage. |
Use Scenario: Isolating SPI clock/data lines and ready/busy signals between MCU and isolated 16-bit ADCs in industrial PLC modules. IC Role / Device Role / Timing Role: Five-channel isolator handling SCLK, MOSI, MISO, CS#, and BUSY with matched propagation delay across all paths. Use Value: Eliminates ground loop errors and noise coupling in high-resolution measurements, preserving 16-bit effective resolution under EMI stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141DBRZ | Four-channel, 150 Mbps, 2500 VRMS, SOIC-16; lacks individual channel enable and has higher 100 Mbps supply current (~35 mA) | Not suitable for five-signal isolation without stacking; less flexible for partial channel shutdown | Select when four channels suffice and ADI ecosystem integration is prioritized |
| ISO6751QDR | Five-channel, 50 Mbps, 5000 VRMS, SOIC-16; lower speed but higher isolation rating and 125 °C operation | Better suited for ultra-high-isolation safety barriers where data rate ≤50 Mbps is acceptable | Prefer for medical or grid-tie inverters needing >3000 VRMS working voltage |
Compared with ADUM141DBRZ and ISO6751QDR, SI8450BB-A-IS1R uniquely balances five-channel count, 150 Mbps speed, and 2500 VRMS certification in a single SOIC-16 package - making it optimal for space-constrained, high-speed industrial and automotive isolation where channel granularity and timing precision are critical.
Availability
SI8450BB-A-IS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated switch-mode power supplies, and hybrid electric vehicle battery management systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SI8450BB-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 communications, 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, wide temperature operation, and regulatory-certified reinforced insulation without optical degradation.
FAQ
What is the maximum operating temperature for SI8450BB-A-IS1R?
The SI8450BB-A-IS1R is rated for continuous operation from –40 °C to +125 °C ambient temperature at full 150 Mbps data rate and 5 V supply. This specification is validated per IEC 60747-5-2 and confirmed in Table 1 of the Skyworks datasheet Rev. 1.6, making SI8450BB-A-IS1R suitable for under-hood automotive and industrial motor drive environments.
Does SI8450BB-A-IS1R require external pull-up or pull-down resistors on its input pins?
No, SI8450BB-A-IS1R does not require external pull-up or pull-down resistors on INx or ENx pins. Its inputs have defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds with ±10 µA leakage, allowing direct connection to CMOS outputs. The SI8450BB-A-IS1R datasheet explicitly states "only VDD bypass capacitors are required" for functional operation.
How many isolation channels does SI8450BB-A-IS1R provide, and how are they configured?
SI8450BB-A-IS1R provides five unidirectional, independently enabled isolation channels. Pins IN1–IN5 and EN1–EN5 reside on the primary side (VDD1/GND1), while OUT1–OUT5 are on the secondary side (VDD2/GND2). Each channel operates with identical timing and electrical specs - confirmed in Tables 3–5 of the SI8450BB-A-IS1R datasheet Rev. 1.6.
What safety certifications apply to SI8450BB-A-IS1R?
SI8450BB-A-IS1R carries UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE 0884-2 (IEC 60747-5-2) certifications. These cover reinforced insulation up to 560 Vpeak working voltage and are verified for the SOIC-16 narrow-body package - details appear in Tables 6 and 9 of the official Skyworks datasheet.
Is SI8450BB-A-IS1R recommended for new designs?
No - Skyworks explicitly marks SI8450BB-A-IS1R as "Not Recommended for New Designs" in the Rev. 1.6 datasheet header. While fully functional and supported, designers should evaluate newer alternatives such as the Si86xx or Si88xx families for enhanced power efficiency, higher CMTI, or extended temperature range before initiating new product development with SI8450BB-A-IS1R.
SI8450BB-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:
- 5
- Inputs - Side 1/Side 2:
- 5/0
- 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
SI8450BB-A-IS1R FAQ
1.How can I place an order for SI8450BB-A-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8450BB-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 SI8450BB-A-IS1R reliable?
The price and inventory of SI8450BB-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 SI8450BB-A-IS1R is usually 5 days.
3.What payment methods are accepted for SI8450BB-A-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450BB-A-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8450BB-A-IS1R?
SI8450BB-A-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8450BB-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 SI8450BB-A-IS1R?
For technical support, including SI8450BB-A-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450BB-A-IS1R requirements.
6.How does Aetrix verify that SI8450BB-A-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8450BB-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 SI8450BB-A-IS1R meets industry standards.
7.What is the process for return or replacement of SI8450BB-A-IS1R?
All SI8450BB-A-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8450BB-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 SI8450BB-A-IS1R part is unused and in its original packaging.
Return procedure for SI8450BB-A-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8450BB-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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