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Skyworks Solutions Inc. SI8455BA-B-IS1R
- Part No.:
- SI8455BA-B-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8455BA-B-IS1R.pdf
- Description:
- DGTL ISO 1000VRMS 5CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
SI8455BA-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 <9.5 ns worst-case propagation delay, 2.7–5.5 V dual supply operation, and 2500 VRMS reinforced isolation for industrial and automotive signal isolation.
For engineers reviewing the SI8455BA-B-IS1R datasheet, SI8455BA-B-IS1R pinout, SI8455BA-B-IS1R application, or SI8455BA-B-IS1R equivalent, this device is selected for high-speed isolated communication in motor control, isolated ADC/DAC interfaces, and switch-mode power supplies where low power, precise timing, and robust CMTI (>25 kV/µs) are critical.
Technical Context
The SI8455BA-B-IS1R implements capacitive isolation with on-chip RF modulation/demodulation across five independent channels, enabling DC-to-150 Mbps operation without start-up initialization. Its dual VDD1/VDD2 supplies (2.7–5.5 V each) support asymmetric voltage domains and allow level-shifting between logic families.
It features integrated enable control per side, 0.5 ns typical channel-to-channel skew, and 1.5 ns pulse width distortion-enabling precise synchronization in real-time control loops. Safety certification includes UL 1577 (2500 VRMS), CSA Component Notice 5A, and VDE IEC 60747-5-2 (560 VPEAK working voltage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 150 Mbps - supports high-resolution encoder feedback and fast serial interface isolation in motor drives. |
| Propagation Delay | 3.0–9.5 ns (typ/max) - enables sub-10 ns timing-critical sampling in isolated current sensing paths. |
| Supply Voltage Range | 2.70–5.5 V per side - allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends without level shifters. |
| Isolation Rating | 2500 VRMS (1 min) - certified for reinforced insulation in industrial PLC I/O modules and EV battery management systems. |
| CMTI | ≥25 kV/µs - ensures reliable operation in noisy switching environments like inverters and SMPS with fast dV/dt transients. |
| Power Consumption | <6 mA per channel at 100 Mbps (5 V) - reduces thermal load and extends battery life in portable isolated sensor nodes. |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions at full 150 Mbps data rate. |
Pinout & Package
SI8455BA-B-IS1R is housed in a RoHS-compliant 16-pin narrow-body SOIC (NB SOIC-16) package with 1.27 mm pitch, 10.3 mm × 7.5 mm footprint, and 2.35 mm max height. Pin 1 marked by notch or dot; pin count and layout conform to JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power supply | Supplies power to input-side logic and channel 1–3 drivers; accepts 2.7–5.5 V with bypass capacitor required. |
| GND1 | Primary-side ground reference | Return path for VDD1; must be separated from GND2 by isolation barrier to maintain creepage/clearance. |
| IN1–IN3 | Input signal terminals (side 1) | Accept CMOS/LVTTL logic inputs; VIH ≥2.0 V, VIL ≤0.8 V; no external pull-ups needed. |
| EN1 | Primary-side enable input | Active-high control: drives outputs low when disabled; 2 µA max input current simplifies MCU GPIO drive. |
| VDD2 | Secondary-side power supply | Supplies output-side logic and channel 4–5 drivers; independent of VDD1 for level translation capability. |
| GND2 | Secondary-side ground reference | Return path for VDD2; galvanically isolated from GND1; defines secondary-side logic reference. |
| OUT1–OUT3 | Isolated output terminals (side 2, channels 1–3) | CMOS-compatible outputs with VOH ≥VDD2–0.4 V, VOL ≤0.4 V; 85 Ω nominal output impedance. |
| OUT4–OUT5 | Isolated output terminals (side 2, channels 4–5) | Matched timing with OUT1–OUT3; same drive strength and skew specs for synchronized multi-channel isolation. |
| EN2 | Secondary-side enable input | Active-high control for secondary-side outputs; enables tri-state behavior with 7–9.2 ns response time. |
Key Features
| Feature | Design Value |
|---|---|
| Five independent isolation channels | Supports full-duplex SPI isolation (3+2 configuration) or separate control/sense signal isolation in single-package BOM reduction. |
| No start-up initialization | Delivers valid output within 15–40 µs of power application-eliminates boot-time delays in safety-critical power-on sequences. |
| Ultra-low power at high speed | Draws only 4.6–6.9 mA per side at 100 Mbps (5 V), enabling thermally constrained designs in sealed enclosures. |
| Precise timing performance | 0.5 ns typical channel-to-channel skew and 1.5 ns pulse width distortion ensure deterministic timing in closed-loop control. |
| High electromagnetic immunity | 25 kV/µs CMTI rating prevents data corruption during fast-switching events in motor drives and inverters. |
Applications
| Industrial Motor Control | Isolated ADC Interface |
|---|---|
Use Scenario: Isolating gate driver control signals and current-sense feedback in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Five-channel isolator separates MCU PWM outputs (IN1–IN3) and current-sense ADC outputs (OUT4–OUT5) across isolation barrier with sub-10 ns timing alignment. Use Value: Enables simultaneous sampling of phase currents with <1 ns skew, improving FOC algorithm accuracy and reducing torque ripple. |
Use Scenario: Interfacing isolated sigma-delta ADCs (e.g., AMC1306) to host MCU in high-voltage battery monitoring. IC Role / Device Role / Timing Role: Transmits 20+ MHz bitstream from ADC's serial output while isolating reference and digital grounds. Use Value: Maintains 16-bit effective resolution by suppressing ground-bounce noise and common-mode transients above 25 kV/µs. |
| Switch-Mode Power Supply | Automotive Onboard Charger |
Use Scenario: Isolating feedback signals (voltage/current) and PWM commands in 1–3 kW AC/DC converters. IC Role / Device Role / Timing Role: Provides bidirectional isolation for optocoupler replacement: IN1–IN3 carry error amplifier outputs; OUT4–OUT5 drive synchronous rectifier MOSFETs. Use Value: Eliminates optocoupler aging and temperature drift, enabling stable 150 kHz+ switching with <10 ns propagation delay matching. |
Use Scenario: Signal isolation between 400 V DC battery domain and 12 V MCU domain in bi-directional OBC units. IC Role / Device Role / Timing Role: Isolates CAN FD communication lines and HV contactor control signals while meeting AEC-Q100 Grade 1 temp range (–40 to +125 °C). Use Value: Achieves 2500 VRMS reinforced insulation and 60-year lifetime at rated voltage-certified to UL, CSA, and VDE standards for automotive use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM141DARZ | Four-channel, 150 Mbps, 2.7–5.5 V, 2500 VRMS; lacks fifth channel and EN2 pin. | Suitable for quad-SPI or I²C isolation but requires external logic for 5-signal systems. | Select when only four isolation paths are needed and board space is constrained-same SOIC-16 footprint. |
| ISO6751QDR | Five-channel, 50 Mbps, 1.71–5.5 V, 5000 VRMS; lower speed, higher isolation rating, different pinout. | Better suited for high-isolation safety barriers (e.g., medical) but insufficient for 100+ Mbps encoder links. | Choose when >3.75 kVRMS working voltage is mandated and data rate ≤50 Mbps suffices. |
Compared with ADUM141DARZ and ISO6751QDR, the SI8455BA-B-IS1R uniquely delivers five-channel 150 Mbps isolation in a standard SOIC-16 with matched timing and dual enable-making it optimal for compact, high-speed industrial and automotive control where channel count and speed are non-negotiable.
Availability
SI8455BA-B-IS1R is available at Aetrix Electronics and suitable for industrial motor control, isolated ADC/DAC interfaces, and automotive onboard charger designs requiring stable component supply and long-term lifecycle support.
Supply support for SI8455BA-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 wireless, automotive, and industrial markets.
The Si84xx family was designed specifically for replacing optocouplers in high-reliability, high-speed digital isolation applications-emphasizing low power, precise timing, and safety-certified robustness across harsh operating environments.
FAQ
What is the maximum data rate supported by the SI8455BA-B-IS1R?
The SI8455BA-B-IS1R supports a maximum data rate of 150 Mbps across all five channels, verified under worst-case conditions (–40 to +125 °C, 5 V supplies, 15 pF load). This enables real-time isolation of high-speed encoder signals, SPI streams, and digital bus traffic without bottlenecks.
Does the SI8455BA-B-IS1R require external components for operation?
No-only VDD bypass capacitors (0.1 µF ceramic, placed near each VDD pin) are required for stable operation of the SI8455BA-B-IS1R. No external resistors, pull-ups, or level shifters are needed, simplifying layout and reducing BOM count.
How does the SI8455BA-B-IS1R handle power supply asymmetry between sides?
The SI8455BA-B-IS1R supports independent VDD1 (2.7–5.5 V) and VDD2 (2.7–5.5 V), allowing asymmetric operation-for example, 3.3 V MCU side and 5 V analog side. This eliminates external level shifters and maintains full 150 Mbps performance across voltage combinations.
What safety certifications apply to the SI8455BA-B-IS1R?
The SI8455BA-B-IS1R is certified to UL 1577 (2500 VRMS), CSA Component Notice 5A (IEC 60950-1/61010-1), and VDE IEC 60747-5-2 (560 VPEAK). These cover reinforced insulation for industrial and automotive applications with validated creepage (4.01 mm) and clearance (4.9 mm).
Is the SI8455BA-B-IS1R recommended for new designs?
No-Skyworks marks the SI8455BA-B-IS1R as "Not Recommended for New Designs" per Rev. 1.6 datasheet (August 2021). It remains fully supported for existing production and legacy refresh; for new projects, consult Skyworks' latest Si86xx or Si88xx families for enhanced performance and longevity.
SI8455BA-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
SI8455BA-B-IS1R FAQ
1.How can I place an order for SI8455BA-B-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8455BA-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 SI8455BA-B-IS1R reliable?
The price and inventory of SI8455BA-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 SI8455BA-B-IS1R is usually 5 days.
3.What payment methods are accepted for SI8455BA-B-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8455BA-B-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8455BA-B-IS1R?
SI8455BA-B-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8455BA-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 SI8455BA-B-IS1R?
For technical support, including SI8455BA-B-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8455BA-B-IS1R requirements.
6.How does Aetrix verify that SI8455BA-B-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8455BA-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 SI8455BA-B-IS1R meets industry standards.
7.What is the process for return or replacement of SI8455BA-B-IS1R?
All SI8455BA-B-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8455BA-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 SI8455BA-B-IS1R part is unused and in its original packaging.
Return procedure for SI8455BA-B-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8455BA-B-IS1R 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.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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