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Skyworks Solutions Inc. SI88320BC-ASR
- Part No.:
- SI88320BC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88320BC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
SI88320BC-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W of regulated 3.3 V or 5.0 V output power across 5 kVRMS isolation. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C. It is used in motor control inverters where compact, reinforced-isolated power and signal transfer are required.
For engineers reviewing the SI88320BC-ASR datasheet, SI88320BC-ASR pinout, SI88320BC-ASR application, or SI88320BC-ASR equivalent, this page provides verified specifications, SOIC-20 wide-body package details, automotive-grade AEC-Q100 qualification status, and confirmed alternative options for isolated power+signal designs requiring UL/CSA/VDE-certified 5 kVRMS reinforcement.
Technical Context
The SI88320BC-ASR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for robust noise immunity and zero-startup initialization. Its integrated flyback DC-DC controller uses secondary-side voltage sensing via VSNS and closed-loop error feedback transmitted across the isolation barrier - eliminating optocouplers and improving load regulation.
This variant supports low-voltage input (3–5.5 V) to 3.3/5.0 V output configurations, with programmable soft-start (SS pin), shutdown (SH_FC pin), and frequency control (SH_FC/SS RC network). It includes internal power switches (VSW), no external ESW/RSN required, and uses Type 1 loop compensation at COMP with RCOMP = 49.9 kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577, CSA 62368-1, VDE 62368-1 - reinforced insulation) |
| Data Rate | Up to 100 Mbps - enables high-speed serial interfaces like SPI, RS-485, or CAN FD transceiver isolation |
| Propagation Delay | 23 ns maximum - ensures tight timing alignment in real-time motor control loops |
| DC-DC Output Power | 2 W average / 5 W peak - sufficient to power isolated gate drivers and MCU peripherals without external regulators |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports PPAP documentation and IMDS/CAMDS compliance for automotive OEMs |
| Package | SOIC-20 wide-body (7.5 mm body width, 1.27 mm pitch) - meets creepage/clearance requirements for 5 kVRMS reinforcement |
Pinout & Package
SI88320BC-ASR is housed in a RoHS-compliant SOIC-20 wide-body package (7.5 mm body width, 1.27 mm pitch), optimized for 5 kVRMS reinforced insulation with ≥8.3 mm creepage and clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 15, 16, 17, 18 | GNDP, VSW, VDDP, VDDA, GNDA, GNDB, VDDB, NC, VSNS, COMP | Primary-side ground/power, internal switch output, primary/secondary supply rails, secondary ground, feedback input, and compensation node - defines dc-dc control loop and isolation boundary |
| 7, 8, 13, 14 | NC, SH_FC, SS, NC | Shutdown/frequency control and soft-start pins - enable safe startup, EMI reduction, and converter disable without PCB layout changes |
| 9, 10, 11, 12 | A1, A2, B1, B2 | Unidirectional digital I/O channels - A1/A2 transmit from primary to secondary; B1/B2 receive from secondary to primary (no bidirectional auto-direction detection) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with secondary-side sensing | Eliminates optocoupler bias circuitry, improves line/load regulation, and reduces BOM count by ≥3 components |
| RF-based isolation architecture | Provides 100 kV/µs common-mode transient immunity and superior magnetic field rejection vs. transformer/opto alternatives |
| Programmable soft-start (SS) and shutdown (SH_FC) | Enables controlled power-up sequencing and system-level fault response without external logic |
| AEC-Q100 qualified + automotive PPAP support | Validated for automotive powertrain and chassis applications with documented IMDS/CAMDS compliance |
| SOIC-20 wide-body packaging | Meets reinforced insulation spacing requirements per IEC 60747-17 and UL 1577 for 5 kVRMS working voltage |
Applications
| Industrial Motor Drives | Automotive Onboard Chargers |
|---|---|
Use Scenario: Isolating gate driver signals and powering auxiliary circuits in 3-phase IGBT/SiC inverter stages. IC Role / Device Role / Timing Role: Dual-channel isolator providing PWM signal transfer and 5 V/2 W isolated supply for gate driver bias and current-sense amplifiers. Use Value: Enables single-package isolation + power, reducing footprint by >40% vs. discrete isolator + DC-DC module solutions. |
Use Scenario: Signal and power isolation between AC/DC front-end controller and DC/DC secondary side in EV OBC units. IC Role / Device Role / Timing Role: Provides reinforced isolation for communication lines (e.g., SPI to isolated ADCs) and powers isolated microcontrollers on secondary side. Use Value: Meets AEC-Q100 and reinforced insulation requirements while simplifying thermal design with integrated 2 W power delivery. |
| PLC Digital I/O Modules | Isolated Data Acquisition Systems |
Use Scenario: Galvanic isolation of 24 V digital inputs/outputs in distributed control systems with local 5 V logic supply. IC Role / Device Role / Timing Role: Transfers status signals (A1/A2 → B1/B2) and generates isolated 5 V rail for local sensor interface ICs. Use Value: Reduces component count and board area vs. separate isolators and isolated DC-DC converters - critical for dense DIN-rail modules. |
Use Scenario: Isolating high-precision analog front-ends (e.g., isolated ΣΔ ADCs) from noisy digital processing domains. IC Role / Device Role / Timing Role: Delivers clean, regulated 3.3 V supply to isolated ADC reference and digital interface, while transferring conversion ready/status signals. Use Value: Prevents ground-loop noise coupling into measurement paths and eliminates need for separate isolated power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated power+signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI88321BC-ASR | Same SOIC-20 package, but includes HF XMTR/RCVR pins for optional high-frequency diagnostics; lacks SH_FC and SS pins - no programmable soft-start or shutdown. | Used where diagnostic channel monitoring is needed, but converter control flexibility is not required. | Select SI88321BC-ASR only if HF channel access is mandatory and soft-start/shutdown are handled externally. |
| ADUM6210ARWZ | SOIC-16 package, 1 W output power, fixed 5 V output, no frequency/soft-start control, lower 3.75 kVRMS isolation rating. | Suitable for non-automotive, space-constrained applications with lower power and isolation requirements. | Choose ADUM6210ARWZ only when 5 kVRMS reinforcement and AEC-Q100 are not required, and 1 W output suffices. |
Compared with SI88320BC-ASR, SI88321BC-ASR trades converter controllability for diagnostic capability, while ADUM6210ARWZ offers smaller footprint at reduced isolation, power, and automotive qualification - making SI88320BC-ASR the only option meeting full 5 kVRMS reinforced, AEC-Q100, and 2 W programmable DC-DC requirements in SOIC-20.
Availability
SI88320BC-ASR is available at Aetrix Electronics and suitable for industrial motor drives, automotive onboard chargers, and PLC digital I/O modules requiring stable component supply with long-term lifecycle assurance.
Supply support for SI88320BC-ASR 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.
The Si88x2x family was designed to replace optocoupler + discrete DC-DC combinations in high-reliability industrial and automotive systems, integrating robust digital isolation and certified isolated power in a single package.
FAQ
What is the maximum continuous output power of the SI88320BC-ASR's integrated DC-DC converter?
The SI88320BC-ASR delivers up to 2 W of continuous regulated output power (3.3 V or 5.0 V) under typical operating conditions, with peak capability up to 5 W. This is sufficient to power isolated gate drivers, ADC references, and microcontroller peripherals without external regulation. The SI88320BC-ASR achieves this using internal power switches and secondary-side feedback, ensuring stable operation across temperature and load variations.
Does the SI88320BC-ASR support bidirectional data transfer on its isolation channels?
No, the SI88320BC-ASR provides two unidirectional digital isolation channels: A1 and A2 transmit from the primary (VDDA/GNDA) side to the secondary (VDDB/GNDB) side, while B1 and B2 transmit in the reverse direction. There is no automatic direction detection or half-duplex arbitration - each channel is hardwired for fixed directionality, as confirmed in the Si8832x pin configuration diagrams and functional description.
What isolation certifications does the SI88320BC-ASR hold, and what do they cover?
The SI88320BC-ASR is certified to UL 1577 (5000 VRMS, 1 min), CSA 62368-1 (reinforced insulation), VDE 62368-1 (conformity), and CQC GB4943.1. These certifications validate its reinforced insulation barrier for functional safety in industrial and automotive end-equipment. The SI88320BC-ASR meets all requirements without external components, enabling direct use in safety-critical signal and power isolation paths.
Can the SI88320BC-ASR generate output voltages other than 3.3 V or 5.0 V?
Yes - while default configurations support 3.3 V or 5.0 V outputs, the SI88320BC-ASR can deliver >5.5 V outputs using external components (e.g., external NPN transistor with VREGB pin). For outputs ≤5.5 V, VREGB must be left unconnected (DNC), per datasheet Table 1. The SI88320BC-ASR's VSNS feedback network allows precise setting of any output voltage within its operational range using resistor dividers.
Is the SI88320BC-ASR pin-compatible with other Si8832x variants like SI88321BC-ASR or SI88322BC-ASR?
No - the SI88320BC-ASR has a unique pin assignment in SOIC-20, including dedicated SH_FC and SS pins for shutdown and soft-start control. SI88321BC-ASR replaces these with HF XMTR/RCVR pins, and SI88322BC-ASR configures all four channels as forward-only (A1/A2/B1/B2 → XMTR). Pinouts differ across Si8832x variants; PCB layout must match the exact part number. The SI88320BC-ASR requires its specific pin mapping for correct DC-DC control and signal routing.
SI88320BC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x2x
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 40kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 18ns, 23ns
- Pulse Width Distortion (Max):
- 7ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SI88320BC-ASR FAQ
1.How can I place an order for SI88320BC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88320BC-ASR 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 SI88320BC-ASR reliable?
The price and inventory of SI88320BC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88320BC-ASR is usually 5 days.
3.What payment methods are accepted for SI88320BC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88320BC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88320BC-ASR?
SI88320BC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88320BC-ASR 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 SI88320BC-ASR?
For technical support, including SI88320BC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88320BC-ASR requirements.
6.How does Aetrix verify that SI88320BC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88320BC-ASR 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 SI88320BC-ASR meets industry standards.
7.What is the process for return or replacement of SI88320BC-ASR?
All SI88320BC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88320BC-ASR, 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 SI88320BC-ASR part is unused and in its original packaging.
Return procedure for SI88320BC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88320BC-ASR Tags
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