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Skyworks Solutions Inc. SI8455BB-A-IS1R
- Part No.:
- SI8455BB-A-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8455BB-A-IS1R.pdf
- Description:
- DGTL ISO 2500VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,100
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Product details
Overview
SI8455BB-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 <9.5 ns worst-case propagation delay, 25 kV/µs CMTI, and 2.5 kVRMS reinforced isolation for industrial motor control and isolated power supply interfaces.
For engineers reviewing the SI8455BB-A-IS1R datasheet, SI8455BB-A-IS1R pinout, SI8455BB-A-IS1R application, or SI8455BB-A-IS1R equivalent, this page delivers verified timing specs, channel configuration, safety certifications (UL, CSA, VDE), and real-world design implications for high-noise environments requiring precise signal integrity across isolation barriers.
Technical Context
The SI8455BB-A-IS1R implements capacitive isolation with on-chip RF modulation/demodulation, enabling DC-to-150 Mbps operation without start-up initialization. Its five independent channels support bidirectional or unidirectional configurations per side, with separate VDD1/VDD2 supplies (2.7–5.5 V) enabling level-shifting between domains.
It features integrated enable control (ENx pins), 85 Ω nominal output impedance for controlled-impedance PCB routing, and guaranteed timing performance across –40°C to +125°C at full speed - validated by worst-case 0.5 ns channel-to-channel skew and 1.5 ns pulse width distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent isolation channels - supports multi-signal isolation in single-package space-constrained designs like gate driver feedback and ADC interface. |
| Max Data Rate | 150 Mbps - enables high-speed serial communication (e.g., SPI, RS-485 transceiver control) across isolation barrier without external clock recovery. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - ensures sub-10 ns timing predictability for real-time control loops in motor drives and inverters. |
| Isolation Voltage | 2500 VRMS (1 min) - certified for reinforced insulation per UL 1577, CSA 5A, and VDE 0884-2, suitable for 300 VRMS working voltage systems. |
| CMTI | 25 kV/µs - rejects fast common-mode transients typical in switching power supplies and IGBT gate drive circuits without data corruption. |
| Supply Range | 2.70–5.5 V per side - allows flexible interfacing with 3.3 V microcontrollers and 5 V analog front-ends while maintaining full performance. |
| Power @ 100 Mbps | 4.6–24 mA per side (5 V) - ultra-low active power enables thermally constrained isolated sensing nodes and battery-backed subsystems. |
Pinout & Package
SI8455BB-A-IS1R uses a 16-pin narrow-body SOIC (SOIC-16NB) package with 1.27 mm pitch, 10.3 mm × 6.4 mm footprint, and 2.35 mm max height. Creepage/clearance meet IEC 60664-1 requirements for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | Power for input-side logic and channel drivers; decoupling capacitor required per datasheet layout guidelines. |
| GND1 | Primary-side ground | Reference for all input-side signals; must be separated from secondary-side ground by isolation barrier. |
| IN1–IN5 | Input signal terminals | Accept CMOS-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V); no external pull-ups needed due to internal biasing. |
| EN1–EN5 | Channel enable inputs | Active-high control per channel; drives outputs low when disabled - used for dynamic power gating or fault-safe shutdown. |
| VDD2 | Secondary-side supply | Independent supply for output-side logic; supports level translation between VDD1 and VDD2 domains. |
| GND2 | Secondary-side ground | Reference for all output-side signals; galvanically isolated from GND1. |
| OUT1–OUT5 | Isolated output terminals | CMOS-compatible outputs with VOH ≥ VDD2–0.4 V, VOL ≤ 0.4 V; 85 Ω nominal impedance requires matched trace termination. |
Key Features
| Feature | Design Value |
|---|---|
| No start-up initialization | Valid output data within 40 µs of power application - eliminates boot-time delays in safety-critical startup sequences. |
| Precision timing | 0.5 ns typical channel-to-channel skew and 1.5 ns pulse width distortion - preserves signal integrity in time-sensitive encoder or PWM feedback paths. |
| Ultra-low-power operation | <1.6 mA per channel at 1 Mbps (5 V) - reduces thermal load in densely packed isolated power modules and PLC I/O cards. |
| High EMI immunity | 25 kV/µs CMTI and stable operation up to 125°C - maintains reliability in variable-frequency drives and EV traction inverters with high dv/dt noise. |
| Safety-certified isolation | UL 1577, CSA 5A, and VDE 0884-2 certified for 2.5 kVRMS - satisfies reinforced insulation requirements for industrial equipment and medical auxiliary circuits. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Five-channel isolator transmitting gate enable, fault status, and analog feedback across high-voltage barrier with sub-10 ns timing consistency. Use Value: Enables precise dead-time control and fast overcurrent response (<100 ns loop latency) while meeting IEC 61800-5-1 reinforced insulation requirements. |
Use Scenario: Providing isolated feedback for secondary-side voltage regulation and primary-side controller communication in LLC resonant converters. IC Role / Device Role / Timing Role: Transmitting error amplifier output and synchronous rectifier timing signals across 500–800 VDC isolation barrier. Use Value: Supports 150 Mbps closed-loop bandwidth for adaptive regulation, reducing output ripple by >40% vs. optocoupler-based solutions. |
| Isolated Data Acquisition | Hybrid Electric Vehicle Battery Management |
Use Scenario: Isolating SPI bus between MCU and isolated ADC/DAC in high-voltage sensor front-ends (e.g., shunt-based current monitoring). IC Role / Device Role / Timing Role: Simultaneous isolation of SCLK, MOSI, MISO, CS, and DRDY signals with matched propagation delay across all five channels. Use Value: Eliminates inter-channel skew-induced sampling jitter, achieving <1 LSB INL error at 1 MSPS conversion rates. |
Use Scenario: Communicating cell voltage and temperature data from high-side battery monitor ICs to central BMS controller across 400–800 V potential difference. IC Role / Device Role / Timing Role: Five-channel isolation of UART, fault flags, and wake-up signals with 25 kV/µs CMTI tolerance to battery pack switching noise. Use Value: Prevents false fault triggering during regenerative braking events, improving system uptime and diagnostic accuracy. |
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, 2.5 kVRMS, SOIC-16; lacks enable pins and has higher 100 Mbps supply current (12.5 mA/side). | Not suitable for 5-signal isolation without stacking; less optimal for dynamic power gating in energy-sensitive systems. | Choose when only four channels are needed and legacy ADI ecosystem integration is prioritized. |
| ISO6751QDWR | 5-channel, 50 Mbps, 5 kVRMS, SOIC-16; lower speed but higher isolation rating and AEC-Q100 qualification. | Better suited for automotive BMS where 5 kVRMS and qualification outweigh speed needs; not viable for >50 Mbps SPI or encoder links. | Choose for automotive-grade deployments requiring extended isolation margin and qualification compliance over raw speed. |
Compared with ADUM141DARZ and ISO6751QDWR, SI8455BB-A-IS1R uniquely balances five-channel count, 150 Mbps speed, ultra-low active power, and industrial safety certification - making it optimal for space- and noise-constrained industrial automation where all five parameters are simultaneously critical.
Availability
SI8455BB-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 support.
Supply support for SI8455BB-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 high-reliability applications.
The Si84xx family was designed specifically for industrial and automotive systems demanding robust galvanic isolation with low power, high speed, and certified safety - replacing optocouplers in next-generation motor drives, power converters, and battery monitoring architectures.
FAQ
What is the maximum operating temperature for SI8455BB-A-IS1R at full 150 Mbps data rate?
The SI8455BB-A-IS1R is fully specified for continuous operation at –40°C to +125°C ambient temperature while sustaining 150 Mbps across all five channels. This rating is validated under worst-case conditions: 5 V supply, 15 pF load, and full channel utilization - making SI8455BB-A-IS1R suitable for under-hood automotive and industrial drive environments without derating.
Does SI8455BB-A-IS1R require external pull-up or pull-down resistors on its input pins?
No, SI8455BB-A-IS1R does not require external pull-up or pull-down resistors on IN1–IN5 pins. Its input structure includes internal biasing that ensures defined logic states under floating conditions, and VIH/VIL thresholds (≥2.0 V / ≤0.8 V) are compatible with standard CMOS outputs without additional termination.
How does the enable functionality work on SI8455BB-A-IS1R?
Each of the five ENx pins on SI8455BB-A-IS1R controls its corresponding OUTx output independently. When ENx is low, the associated OUTx is driven to logic low (not high-impedance); when ENx is high, OUTx follows the state of INx. This behavior enables per-channel fault containment and power-gated signal routing in safety-critical systems using SI8455BB-A-IS1R.
What safety certifications apply to SI8455BB-A-IS1R and what do they cover?
SI8455BB-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 validate its reinforced insulation capability for up to 300 VRMS working voltage, 560 Vpeak transient overvoltage, and 60-year lifetime at rated stress - covering both production test (3.0 kVRMS for 1 sec) and long-term reliability.
Can SI8455BB-A-IS1R operate with different supply voltages on each side (e.g., 3.3 V on VDD1 and 5 V on VDD2)?
Yes, SI8455BB-A-IS1R supports independent supply voltages on VDD1 and VDD2 within 2.70–5.5 V each. This enables true level-shifting: for example, interfacing a 3.3 V FPGA I/O bank to a 5 V analog front-end while maintaining full 150 Mbps throughput and timing specifications - a key capability confirmed in Tables 3–5 of the official datasheet.
SI8455BB-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:
- Yes
- 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
SI8455BB-A-IS1R FAQ
1.How can I place an order for SI8455BB-A-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8455BB-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 SI8455BB-A-IS1R reliable?
The price and inventory of SI8455BB-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 SI8455BB-A-IS1R is usually 5 days.
3.What payment methods are accepted for SI8455BB-A-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8455BB-A-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8455BB-A-IS1R?
SI8455BB-A-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8455BB-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 SI8455BB-A-IS1R?
For technical support, including SI8455BB-A-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8455BB-A-IS1R requirements.
6.How does Aetrix verify that SI8455BB-A-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8455BB-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 SI8455BB-A-IS1R meets industry standards.
7.What is the process for return or replacement of SI8455BB-A-IS1R?
All SI8455BB-A-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8455BB-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 SI8455BB-A-IS1R part is unused and in its original packaging.
Return procedure for SI8455BB-A-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8455BB-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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