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Skyworks Solutions Inc. SI8450AB-B-IS1R
- Part No.:
- SI8450AB-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8450AB-B-IS1R.pdf
- Description:
- DGTL ISO 2500VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
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Product details
Overview
SI8450AB-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 automation and isolated power systems.
For engineers reviewing the SI8450AB-B-IS1R datasheet, SI8450AB-B-IS1R pinout, SI8450AB-B-IS1R application, or SI8450AB-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 signal integrity in motor control and SMPS designs.
Technical Context
The SI8450AB-B-IS1R implements capacitive isolation with on-chip RF modulation/demodulation, enabling DC-to-150 Mbps operation without start-up initialization. Its dual 2.7–5.5 V supplies (VDD1/VDD2) support asymmetric rail configurations and maintain stable timing across –40 to +125 °C at full speed.
It features integrated enable control (ten1 ≤8 ns, ten2 ≤9.2 ns), precise channel matching (pulse width distortion ≤2.5 ns, channel-channel skew ≤1.8 ns), and robust noise immunity (CMTI ≥25 kV/µs), making it suitable for noisy environments like inverters and isolated ADC interfaces where deterministic latency and low jitter are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent unidirectional isolation channels - enables full-duplex serial bus isolation (e.g., SPI with separate CS, SCLK, MOSI, MISO, and enable lines). |
| Max Data Rate | 150 Mbps - supports high-speed communication in real-time motor control and gigabit-capable isolated interfaces. |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns latency for time-critical feedback loops in power converters and servo drives. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA 5A, and VDE IEC 60747-5-2, enabling safe interface between primary and secondary sides of SMPS. |
| Supply Voltage Range | 2.70–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V logic while maintaining performance across voltage rails. |
| CMTI | ≥25 kV/µs - rejects fast common-mode transients typical in IGBT gate drive circuits and variable-frequency drives without data corruption. |
| Channel-Channel Skew | ≤1.8 ns - guarantees tight timing alignment across all five channels for synchronized sampling in isolated ADC/DAC systems. |
Pinout & Package
SI8450AB-B-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 body size, and 4.01 mm creepage / 4.9 mm clearance - validated for reinforced insulation per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | Primary-side inputs (IN1–IN5) | Digital input signals referenced to VDD1; accept 2.0 V VIH / 0.8 V VIL thresholds for compatibility with 3.3 V and 5 V logic. |
| 6, 7, 8 | VDD1, GND1, EN1 | VDD1 powers primary-side circuitry; GND1 is primary ground reference; EN1 enables/disables all outputs (active-high, 2 µA max input current). |
| 9, 10, 11, 12, 13 | Secondary-side outputs (OUT1–OUT5) | CMOS-compatible outputs referenced to VDD2; VOH ≥ VDD2–0.4 V, VOL ≤0.4 V at 4 mA load. |
| 14, 15, 16 | VDD2, GND2, EN2 | VDD2 powers secondary-side circuitry; GND2 is isolated output ground; EN2 provides independent enable control for secondary outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | At 100 Mbps and 5 V: ≤6.9 mA per side (total ≤13.8 mA), reducing thermal load in dense PCB layouts and extending battery life in portable isolated sensors. |
| Precision timing control | Worst-case pulse width distortion ≤2.5 ns and channel-channel skew ≤1.8 ns - enables accurate edge-aligned sampling in multi-channel isolated data acquisition. |
| No start-up initialization | Valid output within 40 µs of power application (tSU) - eliminates boot-time delays in safety-critical systems requiring immediate signal pass-through after reset. |
| High EMI immunity | 25 kV/µs common-mode transient immunity - maintains data integrity during switching noise events in 650 V+ IGBT-based inverters and industrial PLC backplanes. |
| Wide temperature range | Full 150 Mbps operation from –40 to +125 °C - supports under-hood automotive subsystems and high-ambient industrial enclosures without derating. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating gate driver signals and current-sense feedback in three-phase inverter stacks driving PMSM motors. IC Role / Device Role / Timing Role: Five-channel isolator separates MCU PWM outputs (IN1–IN3) and analog feedback paths (IN4–IN5) from high-voltage half-bridge gate drivers and shunt amplifiers on the secondary side. Use Value: Sub-10 ns propagation delay and ≤1.8 ns channel skew ensure synchronized switching and accurate current reconstruction for field-oriented control (FOC) algorithms. |
Use Scenario: Providing isolated feedback and control signaling between primary-side PWM controller and secondary-side synchronous rectifier ICs in LLC resonant converters. IC Role / Device Role / Timing Role: Transfers opto-coupler-replacement error amplifier output (IN1), synchronous rectifier enable (IN2), and overvoltage/overcurrent flags (IN3–IN5) across isolation barrier with deterministic latency. Use Value: 150 Mbps capability supports high-frequency digital compensation schemes; 2500 VRMS rating meets IEC 62368-1 reinforced insulation requirements for >600 V DC input supplies. |
| Hybrid Electric Vehicle Battery Management | Isolated Data Acquisition System |
Use Scenario: Interfacing cell monitoring ICs (e.g., LTC6813) to central BMS MCU across high-potential barriers in 400–800 V traction battery packs. IC Role / Device Role / Timing Role: Isolates SPI clock, MOSI, MISO, CS, and busy/status lines between battery monitor and host processor - all five channels used in full-duplex configuration. Use Value: 2.7–5.5 V dual-supply flexibility accommodates both 3.3 V monitor ICs and 5 V MCU I/O; 125 °C operation sustains reliability in under-battery-pack thermal environments. |
Use Scenario: Digitally isolating precision ADC (e.g., ADS131M04) outputs and control lines in high-voltage partial discharge monitoring equipment. IC Role / Device Role / Timing Role: Transfers four ADC data lanes plus frame sync (IN1–IN5) to isolated FPGA or ARM Cortex-M7 processor, preserving sample alignment via matched channel timing. Use Value: ≤1.8 ns channel-channel skew prevents inter-channel phase error in multi-sensor synchronized acquisition; 25 kV/µs CMTI rejects EMI from HV test pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141D0BRZ | Four-channel, 150 Mbps, 2.7–5.5 V, 3750 VRMS (SOIC-16 wide), higher supply current (15.5 mA @ 100 Mbps) | Lacks fifth channel; wider SOIC-16 package increases board area; higher power draw limits use in thermally constrained modules | Select when only four channels needed and higher isolation voltage (3750 VRMS) is required for medical-grade systems. |
| ISO6751QDWR | Five-channel, 50 Mbps, 1.71–5.5 V, 5000 VRMS (SOIC-16 wide), lower speed but AEC-Q100 qualified | Insufficient for 150 Mbps motor control loops; automotive qualification adds cost and lead time for non-automotive use | Prefer for automotive BMS or infotainment where AEC-Q100 compliance is mandatory and data rate ≤50 Mbps suffices. |
Compared with ADUM141D0BRZ and ISO6751QDWR, SI8450AB-B-IS1R uniquely balances five-channel count, 150 Mbps speed, 2500 VRMS certification, and ultra-low power in a compact narrow-body SOIC - making it optimal for space-constrained industrial inverters where timing precision and thermal efficiency are prioritized over automotive qualification or maximum isolation voltage.
Availability
SI8450AB-B-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, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SI8450AB-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 for high-performance wireless and wired infrastructure.
The Si84xx family was designed specifically for replacing optocouplers in industrial, automotive, and energy systems - delivering superior speed, reliability, and power efficiency through capacitive isolation architecture.
FAQ
What is the maximum operating temperature for SI8450AB-B-IS1R at full 150 Mbps data rate?
The SI8450AB-B-IS1R operates reliably from –40 to +125 °C at 150 Mbps with 5 V supplies and 15 pF load, as confirmed in Table 3 and Table 4 of the datasheet. Thermal derating begins above 125 °C case temperature per Figure 3, and the device's 105 °C/W junction-to-air thermal resistance requires appropriate PCB copper pour for sustained high-speed operation.
Does SI8450AB-B-IS1R support independent enable control on both sides of the isolation barrier?
Yes, SI8450AB-B-IS1R provides two dedicated enable inputs: EN1 (pin 7) controls primary-side input receivers, and EN2 (pin 16) controls secondary-side output drivers. Both are active-high with ≤2 µA input current, allowing independent power-gating of signal paths - critical for low-power sleep modes in isolated communication interfaces.
What safety certifications apply to SI8450AB-B-IS1R and what working voltages do they support?
SI8450AB-B-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2. It supports up to 560 Vpeak working voltage (basic insulation) and 300 VRMS reinforced insulation per IEC 60664-1, validated for use in industrial equipment with ≤600 VRMS mains input.
How does the output impedance of SI8450AB-B-IS1R affect PCB layout for high-speed signals?
The SI8450AB-B-IS1R has a nominal output impedance of 85 Ω ±40%, comprising on-chip series termination and FET channel resistance. For 150 Mbps signals, controlled-impedance PCB traces (e.g., 85–100 Ω) should be used with proper termination to minimize reflections - especially critical in motor control gate drive routing where signal integrity directly impacts switching losses.
Is SI8450AB-B-IS1R pin-compatible with other members of the Si845x family such as SI8451 or SI8452?
No, SI8450AB-B-IS1R is not pin-compatible with SI8451 or SI8452 variants. While all share the same SOIC-16 NB package and pinout numbering, the SI8450AB-B-IS1R is the "B" revision (150 Mbps), whereas SI8451/SI8452 differ in channel directionality (bidirectional vs unidirectional) and internal enable logic - requiring schematic and layout changes for substitution.
SI8450AB-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:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 25ns
- 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
SI8450AB-B-IS1R FAQ
1.How can I place an order for SI8450AB-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8450AB-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 SI8450AB-B-IS1R reliable?
The price and inventory of SI8450AB-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 SI8450AB-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8450AB-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8450AB-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8450AB-B-IS1R?
SI8450AB-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8450AB-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 SI8450AB-B-IS1R?
For technical support, including SI8450AB-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8450AB-B-IS1R requirements.
6.How does Aetrix verify that SI8450AB-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8450AB-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 SI8450AB-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8450AB-B-IS1R?
All SI8450AB-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8450AB-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 SI8450AB-B-IS1R part is unused and in its original packaging.
Return procedure for SI8450AB-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8450AB-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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