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Skyworks Solutions Inc. SI88322BC-ISR
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- Part No.:
- SI88322BC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88322BC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,242
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Product details
Overview
SI88322BC-ISR 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 forward-directional CMOS isolation channels (A1→B1, A2→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 galvanic separation of gate drive signals and auxiliary power for isolated side logic is required.
For engineers reviewing the SI88322BC-ISR datasheet, SI88322BC-ISR pinout, SI88322BC-ISR application, or SI88322BC-ISR equivalent, this page provides verified functional specifications, SOIC-20WB package mapping, automotive-grade AEC-Q100 qualification status, and validated alternative options for industrial and automotive isolated power + signal designs.
Technical Context
The SI88322BC-ISR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for robust noise immunity and magnetic field rejection. Its digital channels operate as unidirectional CMOS buffers without startup initialization or protocol dependency.
The integrated flyback-derived DC-DC controller uses peak current mode regulation with secondary-side voltage sensing via VSNS, closed-loop error encoding across the isolation barrier, and supports soft-start (SS pin), shutdown (SH_FC pin), and programmable switching frequency (200–800 kHz) via external RC on SH_FC/SS pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577, CSA 62368-1, VDE 62368-1 |
| Data Rate | Up to 100 Mbps - enables high-speed serial interface isolation (e.g., SPI, RS-485 transceiver control) |
| Propagation Delay | 23 ns max - ensures tight timing alignment in real-time motor control feedback loops |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power isolated gate drivers, ADC references, and MCU peripherals |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
| Transient Immunity | 100 kV/µs typical - maintains signal integrity during fast-switching IGBT/SiC gate driver noise events |
| AEC-Q100 Grade | Qualified to Grade 1 - certified for automotive powertrain and chassis applications |
Pinout & Package
SI88322BC-ISR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch) with creepage/clearance ≥ 8.3 mm, rated for 5 kVRMS working voltage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | VDDP, VSW, GNDP, VDDA, GNDA, SH_FC | Primary-side power stage and signal supply inputs; SH_FC enables shutdown and frequency programming |
| 7, 8, 9, 10 | A1, A2, SS, NC | Forward digital input channels (A1/A2); SS configures soft-start time constant; NC is unconnected |
| 11, 12, 13, 14 | B1, B2, GNDB, VDDB | Isolated-side output channels (B1/B2); GNDB/VDDB form secondary-side ground/power domain |
| 15, 16, 17, 18, 19, 20 | VSNS, COMP, NC, NC, NC, NC | VSNS feeds back isolated output voltage; COMP sets loop compensation; remaining pins are no-connect |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with secondary-side sensing | Eliminates optocoupler bias circuitry; achieves ±1.5% load regulation and superior line regulation vs. primary-sensed topologies |
| RF-based isolation architecture | Provides 100 kV/µs common-mode transient immunity and immunity to magnetic fields - critical for inverter gate drive domains |
| Programmable soft-start and shutdown | SS pin capacitor sets inrush current limit; SH_FC pin enables system-level power sequencing and fault recovery |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with PPAP documentation support, IMDS/CAMDS compliance, and zero-defect manufacturing flow |
| SOIC-20WB package with 8.3 mm creepage | Meets reinforced insulation spacing requirements for 600 VAC working voltage systems without additional slotting or coating |
Applications
| Motor Control Inverter | Industrial PLC I/O Module |
|---|---|
Use Scenario: Isolating PWM gate drive signals and powering isolated gate driver ICs in 3-phase SiC inverter stacks. IC Role / Device Role / Timing Role: Provides bidirectional power (2 W @ 5 V) and unidirectional signal isolation (A1→B1, A2→B2) with 23 ns prop delay for precise timing-critical gate timing. Use Value: Enables compact, single-chip isolated power + signal solution-reducing BOM count by eliminating separate DC-DC and isolator ICs. |
Use Scenario: Isolating analog input conditioning circuits and digital I/O in modular PLC backplanes operating in noisy factory environments. IC Role / Device Role / Timing Role: Delivers isolated 5 V for ADC reference and op-amp supplies while transmitting sensor status and control commands across safety barrier. Use Value: Maintains >100 kV/µs CMTI during ESD and relay coil switching events-preventing data corruption in distributed I/O networks. |
| Onboard Charger (OBC) | Hybrid EV Battery Management |
Use Scenario: Providing isolated auxiliary power and signal isolation between AC/DC front-end controller and DC/DC secondary-side monitoring in EV onboard chargers. IC Role / Device Role / Timing Role: Supplies 5 V to isolated microcontroller and isolates communication lines (e.g., UART to battery pack) with fail-safe default-low outputs. Use Value: Meets reinforced insulation requirements (UL 1577, VDE 62368-1) for functional safety in 1000 V DC battery systems. |
Use Scenario: Isolating cell voltage measurement ICs and balancing FET drivers in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: Powers isolated ADC reference and isolates cell monitor communication links with 5 kVRMS withstand capability. Use Value: Supports extended temperature range (–40 °C to +125 °C) and AEC-Q100 qualification-ensuring reliability in under-hood BMS modules. |
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 |
|---|---|---|---|
| ADUM6210ARWZ | 2-channel isolator + 500 mW isolated DC-DC; SOIC-16WB; 25 Mbps max data rate; no programmable frequency or soft-start | Limited to low-power isolated logic; insufficient for driving gate drivers or powering ADCs requiring >1 W | Select when only basic digital isolation and sub-0.5 W auxiliary power are needed; lower cost but lower performance envelope |
| ISO7821FDWWR | 2-channel isolator only (no DC-DC); SOIC-16WB; 100 Mbps; 11 ns prop delay; requires external isolated power supply | Requires discrete isolated DC-DC (e.g., transformer + controller), increasing layout complexity and component count | Select when higher-speed timing (11 ns) is critical and external isolated power is already available or preferred for efficiency tuning |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88322BC-ISR uniquely integrates 2 W isolated power with 100 Mbps signaling and AEC-Q100 qualification-enabling single-component solutions for automotive inverter and industrial BMS subsystems where space, reliability, and regulatory compliance are constrained.
Availability
SI88322BC-ISR is available at Aetrix Electronics and suitable for motor control inverters, industrial PLC I/O modules, onboard chargers, and hybrid EV battery management systems requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI88322BC-ISR 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 communications, automotive, and industrial markets.
The Si88x2x family was designed to replace optocoupler-based isolation + discrete DC-DC combinations in high-reliability, space-constrained applications-delivering integrated signal and power isolation with AEC-Q100 qualification and reinforced safety certification.
FAQ
What is the maximum isolated DC-DC output power of the SI88322BC-ISR?
The SI88322BC-ISR delivers up to 2 W of average isolated output power at 5.0 V, supporting auxiliary loads such as isolated gate drivers, ADC references, and microcontroller peripherals. Peak power capability exceeds 5 W briefly, but sustained operation is rated at 2 W under thermal limits specified in the datasheet. This output is regulated via secondary-side feedback through the VSNS pin.
Does the SI88322BC-ISR support bidirectional data transmission?
No, the SI88322BC-ISR provides two unidirectional digital isolation channels: A1→B1 and A2→B2. It does not support reverse-direction signaling (e.g., B1→A1). For bidirectional applications, external logic or a second isolator channel must be used. This architecture simplifies timing analysis and ensures deterministic propagation delay behavior in motor control timing paths.
What is the purpose of the SH_FC pin on the SI88322BC-ISR?
The SH_FC pin on the SI88322BC-ISR serves dual functions: it enables shutdown of the integrated DC-DC converter when driven high, and it allows programmable switching frequency (200–800 kHz) when used with an external resistor-capacitor network tied to the SS pin. This pin replaces the dedicated SH pin found on Si882xx devices and provides flexible power sequencing and EMI optimization.
Can the SI88322BC-ISR be used in high-voltage input configurations (e.g., 24 V primary)?
No - the SI88322BC-ISR is designed for low-voltage-to-low-voltage (3–5.5 V input → 3/5 V output) or low-voltage-to-high-voltage (3–5.5 V input → up to 24 V output) DC-DC operation. It lacks the ESW and RSN pins required for high-voltage primary-side switching. For 24 V input applications, Si8842x or Si8862x variants must be selected instead.
How does the SI88322BC-ISR achieve its 100 kV/µs common-mode transient immunity?
The SI88322BC-ISR achieves 100 kV/µs CMTI through its RF-based on/off keying isolation architecture across a silicon dioxide capacitive barrier, combined with balanced differential transmitter/receiver design and optimized internal layout. This eliminates sensitivity to magnetic coupling and ground bounce - a key advantage over transformer- or optocoupler-based isolators in fast-switching inverter environments.
SI88322BC-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 0/2
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SI88322BC-ISR FAQ
1.How can I place an order for SI88322BC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88322BC-ISR 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 SI88322BC-ISR reliable?
The price and inventory of SI88322BC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88322BC-ISR is usually 5 days.
3.What payment methods are accepted for SI88322BC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88322BC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88322BC-ISR?
SI88322BC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88322BC-ISR 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 SI88322BC-ISR?
For technical support, including SI88322BC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88322BC-ISR requirements.
6.How does Aetrix verify that SI88322BC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88322BC-ISR 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 SI88322BC-ISR meets industry standards.
7.What is the process for return or replacement of SI88322BC-ISR?
All SI88322BC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88322BC-ISR, 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 SI88322BC-ISR part is unused and in its original packaging.
Return procedure for SI88322BC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88322BC-ISR Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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