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Skyworks Solutions Inc. SI88322EC-ISR
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- Part No.:
- SI88322EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88322EC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
SI88322EC-ISR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W output power at 3.3 V or 5.0 V, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and 5000 VRMS isolation rating. It serves as a signal and power isolation solution in motor control gate drivers and industrial PLC I/O modules.
For engineers reviewing the SI88322EC-ISR datasheet, SI88322EC-ISR pinout, SI88322EC-ISR application, or SI88322EC-ISR equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for high-reliability isolated power and signal transfer in automotive and industrial systems.
Technical Context
The SI88322EC-ISR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for robust digital channel operation, eliminating startup initialization requirements. Its two unidirectional CMOS isolation channels operate independently with typical propagation delay of 18 ns and guaranteed max 23 ns.
The integrated DC-DC controller uses peak current mode control with closed-loop feedback via VSNS/COMP pins, supports soft-start (SS pin), shutdown (SH_FC pin), and programmable switching frequency (200–800 kHz) - all confirmed for Si883xx family including SI88322EC-ISR per datasheet Figures 2 and 3 and Section 2.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577 certified); enables reinforced insulation in safety-critical industrial and automotive designs. |
| Data Rate | Up to 100 Mbps; supports high-speed serial interfaces like SPI, RS-485 transceiver control, and PWM feedback loops. |
| Propagation Delay | ≤23 ns max; ensures tight timing alignment between primary and secondary side control signals. |
| DC-DC Output Power | Up to 2 W average at 3.3 V or 5.0 V; powers secondary-side microcontrollers, gate drivers, or sensors without external regulators. |
| Operating Temp | –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 EFT/burst events in motor drive and inverter applications. |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G; supports automotive-grade production with PPAP documentation and IMDS/CAMDS compliance. |
Pinout & Package
SI88322EC-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 5000 VRMS isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 15, 16, 17, 18 | Primary-side power & ground (VDDP, GNDP), control (SH_FC, SS), switch (VSW) | VSW drives internal transformer primary; SH_FC enables shutdown; SS sets soft-start time constant with external capacitor. |
| 7, 8, 13, 14 | Digital input/output channels (A1, A2, B1, B2) | A1/A2 are unidirectional forward channels; B1/B2 are unidirectional reverse channels; no internal direction control logic required. |
| 9, 10, 11, 12, 19, 20 | Secondary-side power & feedback (VDDB, GNDB, VSNS, COMP, NC) | VSNS senses isolated output voltage via resistor divider; COMP connects external R+C for loop compensation (RCOMP = 49.9 kΩ). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates need for optocoupler biasing circuitry and enables sub-23 ns propagation with no startup handshake. |
| Integrated DC-DC with secondary-side sensing | Enables precise line/load regulation without optocouplers or secondary-side reference ICs. |
| Programmable soft-start & shutdown | SS pin accepts external capacitor to limit inrush; SH_FC pin asserts high to disable converter - both reduce system-level stress during power sequencing. |
| Peak current mode control | Provides inherent cycle-by-cycle current limiting and stable operation across input/output voltage variations. |
| Automotive-grade qualification | AEC-Q100 qualified with AIAG-compliant PPAP support and IMDS/CAMDS listings for Tier 1 supply chain traceability. |
Applications
| Motor Control Gate Driver Isolation | Industrial PLC Digital I/O Module |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and high-voltage IGBT/MOSFET gate drivers in servo inverters. IC Role / Device Role / Timing Role: SI88322EC-ISR provides bidirectional signal isolation (A1/A2 for PWM, B1/B2 for DESAT/FAULT) and powers gate driver ICs via its 5 V/2 W isolated output. Use Value: Enables compact, single-chip isolation + power solution replacing discrete optocouplers + isolated DC-DC, reducing BOM count and PCB area by >40%. | Use Scenario: Providing isolated digital input/output channels and local 3.3 V supply for sensor interface and actuator control in distributed control cabinets. IC Role / Device Role / Timing Role: SI88322EC-ISR delivers 2 forward and 2 reverse isolation paths plus regulated 3.3 V for downstream logic, meeting IEC 61000-4-5 surge immunity requirements. Use Value: Meets 5000 VRMS reinforced insulation and 100 kV/µs CMTI specs required for PLC backplane isolation, eliminating need for external TVS or filtering components. |
| Onboard Charger (OBC) Communication Interface | Hybrid EV Battery Management System (BMS) |
Use Scenario: Isolating CAN FD or SPI communication between OBC MCU and AC/DC controller while powering isolated ADCs and comparators. IC Role / Device Role / Timing Role: SI88322EC-ISR forwards control commands (A1/A2) and relays status (B1/B2), with its DC-DC supplying 5 V to isolated analog front-end circuits. Use Value: Supports AEC-Q100 qualification and –40 °C to +125 °C operation required for under-hood OBC placement, with <23 ns delay preserving timing-critical feedback loops. | Use Scenario: Isolating cell voltage monitoring and balancing control signals between battery pack and master controller in 400 V–800 V traction battery stacks. IC Role / Device Role / Timing Role: SI88322EC-ISR provides galvanic separation for UART/SPI links and powers isolated multiplexers and precision references on the high-side monitoring board. Use Value: Achieves 5000 VRMS isolation and 100 kV/µs CMTI needed for safe operation across multi-kilovolt battery domains, with automotive-grade reliability validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated DC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6210ARWZ | Single 500 mA isolated 5 V output; 25 Mbps max data rate; no programmable frequency or soft-start. | Limited to lower-power isolated logic; not suitable for >1 W loads or high-speed feedback loops. | Select when only basic 2-channel isolation + low-power supply is needed and AEC-Q100 is not required. |
| ISO7821FDWR | No integrated DC-DC; requires external isolated power supply; 100 Mbps data rate; 16-pin SOIC package. | Requires separate isolated DC-DC IC or transformer module; increases design complexity and footprint. | Select when higher channel count or tighter layout constraints favor modular isolation + power architecture. |
Compared with ADUM6210ARWZ and ISO7821FDWR, SI88322EC-ISR uniquely combines AEC-Q100 qualification, 2 W isolated power, 100 Mbps speed, and programmable soft-start/shutdown in a single SOIC-20 package - enabling simplified, automotive-grade isolated subsystems without external power conversion components.
Availability
SI88322EC-ISR is available at Aetrix Electronics and suitable for motor control gate drivers, 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 SI88322EC-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.
The Si88x2x product line was designed specifically for high-reliability signal and power isolation in automotive, industrial, and energy infrastructure applications - integrating RF isolation and flyback DC-DC into a single package to replace optocoupler + discrete regulator architectures.
FAQ
What is the maximum isolated output power of the SI88322EC-ISR?
The SI88322EC-ISR delivers up to 2 W average isolated output power at 3.3 V or 5.0 V, as specified in the Skyworks Si88x2x datasheet Section 1 and Figure 7. This output powers secondary-side circuitry such as gate drivers, ADCs, or microcontrollers without requiring an external isolated DC-DC converter. The SI88322EC-ISR achieves this using its integrated peak-current-mode flyback controller with internal power switches and secondary-side voltage sensing via the VSNS pin.
Does the SI88322EC-ISR support programmable switching frequency?
Yes, the SI88322EC-ISR supports programmable switching frequency from 200 kHz to 800 kHz using external RC components connected to the SH_FC and SS pins, as confirmed in Section 2.3.3 of the official datasheet. This capability allows EMI optimization during system-level emissions testing. Unlike Si882xx/4xx variants with fixed 250 kHz operation, the Si883xx family-including SI88322EC-ISR-uses this dual-pin configuration for frequency tuning without modifying the transformer or compensation network.
What is the purpose of the SH_FC and SS pins on the SI88322EC-ISR?
The SH_FC pin (Pin 7) provides shutdown control: asserting it high disables the internal DC-DC converter. The SS pin (Pin 8) sets soft-start duration via an external capacitor, limiting inrush current during power-up. Both functions are explicitly documented for Si883xx devices in Section 2.3.1 and 2.3.2 of the datasheet. These pins enable safe, controlled power sequencing in automotive and industrial systems where uncontrolled turn-on could damage downstream circuitry.
Can the SI88322EC-ISR be used in automotive applications?
Yes, the SI88322EC-ISR is AEC-Q100 qualified and designated as an automotive-grade part, with full PPAP documentation support, IMDS/CAMDS listings, and operation over –40 °C to +125 °C. Its 5000 VRMS isolation, 100 kV/µs CMTI, and reinforced insulation certification per UL 1577 and IEC 62368-1 make it suitable for under-hood and battery-domain applications in hybrid and electric vehicles, as stated in the datasheet's "Automotive Grade" section and Safety Regulatory Approvals table.
What package type and pin count does the SI88322EC-ISR use?
The SI88322EC-ISR uses a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch) with 20 leads and ≥8.3 mm creepage/clearance, as shown in Figure 2 of the datasheet. This package is distinct from the SOIC-16 used by Si882xx variants and supports the additional control pins (SH_FC, SS) and dual-channel isolation + DC-DC functionality required by the Si8832x series.
SI88322EC-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
SI88322EC-ISR FAQ
1.How can I place an order for SI88322EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88322EC-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 SI88322EC-ISR reliable?
The price and inventory of SI88322EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88322EC-ISR is usually 5 days.
3.What payment methods are accepted for SI88322EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88322EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88322EC-ISR?
SI88322EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88322EC-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 SI88322EC-ISR?
For technical support, including SI88322EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88322EC-ISR requirements.
6.How does Aetrix verify that SI88322EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88322EC-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 SI88322EC-ISR meets industry standards.
7.What is the process for return or replacement of SI88322EC-ISR?
All SI88322EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88322EC-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 SI88322EC-ISR part is unused and in its original packaging.
Return procedure for SI88322EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88322EC-ISR Tags
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