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Skyworks Solutions Inc. SI8455BA-B-IUR
- Part No.:
- SI8455BA-B-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8455BA-B-IUR.pdf
- Description:
- DGTL ISO 1000VRMS 5CH GP 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
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Product details
Overview
SI8455BA-B-IUR from Skyworks Solutions is a five-channel digital isolator in QSOP-16 package, providing 150 Mbps data rate, <9.5 ns worst-case propagation delay, and 1000 VRMS isolation for high-noise industrial signal conditioning. It operates across 2.70–5.5 V supply rails and supports –40 to 125 °C ambient temperature at full speed.
For engineers reviewing the SI8455BA-B-IUR datasheet, SI8455BA-B-IUR pinout, SI8455BA-B-IUR application, or SI8455BA-B-IUR equivalent, this device delivers precise timing (0.5 ns channel-channel skew), ultra-low power (<6 mA per channel at 100 Mbps), and robust CMTI (>25 kV/µs) in safety-certified isolation for motor control and isolated ADC interfaces.
Technical Context
The SI8455BA-B-IUR implements RF-based on/off keying modulation across a semiconductor isolation barrier-eliminating start-up initialization and enabling deterministic timing without PLL lock or calibration. Each of its five channels operates independently with bidirectional capability and enable-controlled tri-state outputs.
It supports dual supply domains (VDD1/VDD2), tolerates mismatched rail voltages (2.70–5.5 V each), and maintains stable propagation delay skew (<3 ns P-P) and pulse width distortion (<2.5 ns) across temperature and voltage. Safety compliance includes UL 1577 (1000 VRMS), VDE IEC 60747-5-2 (560 Vpeak working voltage), and CSA 5A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent unidirectional or bidirectional isolation channels |
| Max Data Rate | 150 Mbps - enables real-time feedback in servo drives and high-speed serial interfaces |
| Propagation Delay | 3.0–9.5 ns - ensures sub-10 ns timing budget for closed-loop control systems |
| Channel-Channel Skew | 0.5 ns typical - critical for synchronized sampling across multiple ADC/DAC lines |
| Isolation Rating | 1000 VRMS (1 min) - meets reinforced insulation requirements for industrial mains-connected systems |
| CMTI | 25 kV/µs - sustains reliable operation in high-dV/dt environments like IGBT gate drivers |
| Supply Voltage Range | 2.70–5.5 V per side - allows interoperability with 3.3 V microcontrollers and 5 V analog subsystems |
Pinout & Package
SI8455BA-B-IUR is housed in a 16-pin QSOP package (5.3 mm × 10.2 mm, 1.0 mm height) with 0.635 mm pitch and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Input-side power supply | Supplies logic and transmitter circuitry; accepts 2.70–5.5 V; bypass capacitor required |
| GND1 | Input-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier |
| IN1–IN5 | Input signals (side 1) | Accept CMOS/LVTTL logic; VIH ≥ 2.0 V, VIL ≤ 0.8 V; no external pull-ups needed |
| VDD2 | Output-side power supply | Supplies receiver and output driver; independent of VDD1; enables level-shifting |
| GND2 | Output-side ground reference | Return path for VDD2; galvanically isolated from GND1 |
| OUT1–OUT5 | Isolated output signals (side 2) | CMOS-compatible outputs; VOH ≥ VDD2–0.4 V, VOL ≤ 0.4 V; 85 Ω nominal output impedance |
| EN1–EN5 | Per-channel enable inputs | Active-high control on output side; drives outputs to high-impedance when low |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates start-up delay and initialization sequences; enables immediate data transfer after power-on |
| Ultra-low power at 100 Mbps | <6 mA per channel at 5 V - reduces thermal load in dense PCB layouts and extends battery life in portable isolators |
| Precision timing performance | 1.5 ns pulse width distortion and 0.5 ns channel-channel skew - preserves signal integrity in time-critical encoder interfaces |
| High CMTI immunity | 25 kV/µs - prevents false triggering in motor drive inverters with fast-switching SiC/GaN FETs |
| Safety certifications | UL 1577 (1000 VRMS), VDE IEC 60747-5-2 (560 Vpeak), CSA 5A - qualified for industrial and medical equipment design |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
|
Use Scenario: Isolating PWM gate signals and current-sense feedback between MCU and three-phase inverter stage. IC Role / Device Role / Timing Role: Five-channel isolator transmits 3x PWM outputs + 2x current-sense ADC digital outputs across isolation barrier. Use Value: 0.5 ns channel-channel skew ensures synchronized switching; 150 Mbps supports high-resolution current sampling at >200 kSPS. |
Use Scenario: Digitally isolating serial interface (SPI) between isolated ADC (e.g., AD7403) and host processor. IC Role / Device Role / Timing Role: Provides separate isolation paths for SCLK, MOSI, MISO, CS, and DRDY signals. Use Value: Sub-10 ns propagation delay preserves setup/hold timing margins; 25 kV/µs CMTI prevents SPI corruption near power stages. |
| Switch-Mode Power Supply | Communications System Isolation |
|
Use Scenario: Isolating feedback signals (voltage/current sense) and PWM commands in isolated DC-DC converters. IC Role / Device Role / Timing Role: Transfers error amplifier output and synchronous rectifier control across primary-secondary boundary. Use Value: Dual-supply operation (2.7–5.5 V each side) enables direct interfacing with both primary-side controllers and secondary-side sensors. |
Use Scenario: Galvanic isolation of RS-485 transceiver control lines and data paths in factory automation networks. IC Role / Device Role / Timing Role: Isolates DE/RE control pins and differential data lines (A/B) to break ground loops. Use Value: 1000 VRMS rating meets IEC 61000-4-5 surge immunity requirements; 5-channel count supports full duplex + control + fault signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141DARZ | 4-channel, 150 Mbps, SOIC-16; higher 12 ns max propagation delay; no per-channel enable | Lacks fifth channel and individual EN control; less suitable for 5-signal isolation (e.g., 3PWM+2ADC) | Select when only four signals require isolation and board space favors SOIC over QSOP |
| ISO6751QDR | 5-channel, 50 Mbps, SOIC-16; lower power but limited to 50 Mbps; 3000 VRMS isolation | Insufficient data rate for 150 Mbps encoder or high-speed SPI; better for low-speed sensor buses | Choose for cost-sensitive, lower-speed designs where 50 Mbps suffices and enhanced isolation margin is prioritized |
Compared with ADUM141DARZ and ISO6751QDR, SI8455BA-B-IUR uniquely combines five channels, 150 Mbps speed, per-channel enable, and QSOP-16 footprint-making it optimal for compact, high-fidelity industrial feedback systems requiring precise multi-signal synchronization.
Availability
SI8455BA-B-IUR is available at Aetrix Electronics and suitable for industrial motor control, isolated ADC interfaces, and switch-mode power supplies requiring stable component supply and long-term lifecycle support.
Supply support for SI8455BA-B-IUR 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 leader in high-performance analog semiconductors, specializing in RF, timing, and isolation technologies for demanding communications and industrial markets.
The Si84xx family was engineered for noise-immune, low-power digital isolation in harsh environments-targeting motor drives, power conversion, and precision measurement systems where reliability and timing fidelity are non-negotiable.
FAQ
What is the maximum operating temperature for SI8455BA-B-IUR at 150 Mbps?
The SI8455BA-B-IUR is rated for continuous operation at –40 to 125 °C ambient temperature while sustaining 150 Mbps data rate across all five channels. This specification is validated under worst-case loading (15 pF), 5 V supply, and full channel utilization per Skyworks Rev. 1.2 datasheet Table 1.
Does SI8455BA-B-IUR require external startup configuration or calibration?
No. SI8455BA-B-IUR uses an RF on/off keying architecture with no start-up initialization required. Valid data appears at outputs within 40 µs of power application (tSU max), and no firmware, register writes, or external components beyond VDD bypass capacitors are needed for operation.
Can SI8455BA-B-IUR operate with different supply voltages on input and output sides?
Yes. SI8455BA-B-IUR supports independent VDD1 and VDD2 rails ranging from 2.70 V to 5.5 V each. This enables level-shifting-for example, interfacing a 3.3 V MCU (VDD1) with a 5 V ADC (VDD2)-without external level translators or voltage dividers.
What safety certifications apply to SI8455BA-B-IUR?
SI8455BA-B-IUR carries UL 1577 recognition (1000 VRMS, 1 minute), VDE certification to IEC 60747-5-2 (560 Vpeak working voltage), and CSA Component Notice 5A. All certifications apply to the QSOP-16 package variant and are production-tested per datasheet Table 6.
How does the enable (EN) function behave on SI8455BA-B-IUR?
Each EN pin controls its corresponding OUT pin: when ENx = low, OUTx enters high-impedance state within 9.2 ns (ten2 max); when ENx = high or NC, OUTx follows INx with typical 6 ns propagation delay. EN pins reside on the output side and accept 2.7–5.5 V logic levels.
SI8455BA-B-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (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-QSOP
SI8455BA-B-IUR FAQ
1.How can I place an order for SI8455BA-B-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8455BA-B-IUR 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 SI8455BA-B-IUR reliable?
The price and inventory of SI8455BA-B-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8455BA-B-IUR is usually 5 days.
3.What payment methods are accepted for SI8455BA-B-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8455BA-B-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8455BA-B-IUR?
SI8455BA-B-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8455BA-B-IUR 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 SI8455BA-B-IUR?
For technical support, including SI8455BA-B-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8455BA-B-IUR requirements.
6.How does Aetrix verify that SI8455BA-B-IUR is sourced from the original manufacturer or authorized distributors?
All SI8455BA-B-IUR 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 SI8455BA-B-IUR meets industry standards.
7.What is the process for return or replacement of SI8455BA-B-IUR?
All SI8455BA-B-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8455BA-B-IUR, 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 SI8455BA-B-IUR part is unused and in its original packaging.
Return procedure for SI8455BA-B-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8455BA-B-IUR Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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