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Skyworks Solutions Inc. SI88222BC-IS
- Part No.:
- SI88222BC-IS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88222BC-IS.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,402
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Product details
Overview
SI88222BC-IS from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 5 W peak output power at 3.3 V or 5.0 V, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and reinforced isolation rated to 5000 VRMS. It is used in industrial inverters and EV motor control systems where galvanic separation of signal and power domains is required.
For engineers reviewing the SI88222BC-IS datasheet, SI88222BC-IS pinout, SI88222BC-IS application, or SI88222BC-IS equivalent, key selection considerations include its SOIC-16 wide-body package, dual unidirectional channel configuration, integrated flyback controller with external transformer interface, AEC-Q100 qualification, and fail-safe mode support.
Technical Context
The SI88222BC-IS implements RF-based on/off keying for digital isolation across a silicon dioxide capacitive barrier, enabling robust noise immunity and zero initialization latency. Its integrated DC-DC controller operates in peak current mode with closed-loop feedback via VSNS/COMP pins and supports soft-start (SS), shutdown (SH), and internal switch drive (VSW).
This variant belongs to the Si8822x subfamily and uses a low-voltage input configuration (3–5.5 V primary) with internal power switches - no external FET required. It features two forward-only digital channels (A1→B1, A2→B2), no reverse channels, and DNC/VREGB pin reserved for >5.5 V output configurations only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute per UL 1577; reinforced insulation certified to IEC 62368-1 |
| Data Rate | Up to 100 Mbps - enables high-speed serial interfaces like SPI, RS-485, and CAN FD transceiver isolation |
| Propagation Delay | ≤23 ns max - ensures tight timing alignment in real-time motor control loops |
| DC-DC Output Power | Up to 5 W peak, 2 W average at 5 V - sufficient to power secondary-side MCU, gate drivers, or sensors |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Transient Immunity | 100 kV/µs typical - withstands fast EFT/burst events in noisy factory environments |
| Package | SOIC-16 wide-body (7.5 mm creepage/clearance) - meets reinforced insulation spacing requirements |
Pinout & Package
SI88222BC-IS is housed in a RoHS-compliant SOIC-16 wide-body package with 7.5 mm creepage and clearance, optimized for reinforced isolation compliance. Pin 1 is marked with a dot; the isolation barrier separates primary (pins 1–8) and secondary (pins 9–16) sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GNDP | Primary-side power ground | Return path for VDDP and internal switch; must be short-traced to VDDP bypass capacitor |
| 2 VSW | Internal switch output | Drives transformer primary directly; requires snubber for EMI suppression |
| 3 VDDP | Primary-side power supply | 3.0–5.5 V input for DC-DC controller and isolation transmitter |
| 4 VDDA | Primary-side signal supply | 3.0–5.5 V for A1/A2 input buffers and logic; separate from VDDP for noise isolation |
| 5 GNDA | Primary-side signal ground | Reference for A1/A2 inputs; tied to GNDP via shortest possible trace |
| 6 SH | Shutdown control | Active-high disable of DC-DC converter; pull to GND for normal operation |
| 7 GNDB | Secondary-side signal ground | Reference for B1/B2 outputs; isolated from GNDA by capacitive barrier |
| 8 VDDB | Secondary-side signal supply | Powered by internal DC-DC; supplies B1/B2 output drivers and external loads |
| 9 VSNS | Feedback sense input | Resistor-divider voltage from isolated output; sets regulated VDDB level |
| 10 COMP | Compensation node | Connect RCOMP (49.9 kΩ) and CCOMP externally to stabilize flyback loop |
| 11 NC | No-connect | Not bonded; leave floating or grounded per layout best practice |
| 12 A1 | Primary-side input channel 1 | Unidirectional digital input (A→B); CMOS-compatible, 3.0–5.5 V logic |
| 13 A2 | Primary-side input channel 2 | Unidirectional digital input (A→B); independent timing and fail-safe behavior |
| 14 B1 | Secondary-side output channel 1 | Isolated output driven by A1; rail-to-rail swing referenced to VDDB/GNDB |
| 15 B2 | Secondary-side output channel 2 | Isolated output driven by A2; supports fail-safe default-low state |
| 16 DNC/VREGB | Do-not-connect / reference output | Internally zener-clamped; connect only if VDDB > 5.5 V; otherwise leave unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Dual unidirectional isolation channels | A1→B1 and A2→B2 only - simplifies signal directionality in SPI master-slave or PWM feedforward paths |
| Integrated flyback DC-DC controller | Eliminates need for optocoupler-based feedback; enables precise secondary-side voltage regulation without extra ICs |
| Soft-start (SS) and shutdown (SH) pins | Enables controlled power-up sequencing and system-level fault response without firmware intervention |
| RF-based isolation architecture | Superior magnetic field immunity vs. transformer- or capacitor-based alternatives; no startup calibration needed |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including battery management and traction inverter control units |
| Fail-safe output mode | B1/B2 default to logic-low during UVLO or isolation barrier fault - prevents undefined states in safety-critical drives |
Applications
| Industrial Motor Drives | EV Traction Inverters |
|---|---|
Use Scenario: Isolating gate driver signals and feedback in 3-phase IGBT/SiC inverter stacks operating at 600–1200 V bus voltages. IC Role / Device Role / Timing Role: SI88222BC-IS provides isolated PWM inputs to high-side gate drivers and senses isolated current-sense amplifier outputs with <23 ns skew. Use Value: Enables compact, high-reliability inverter designs with reinforced isolation margin and no external DC-DC or optocouplers required. |
Use Scenario: Signal and power isolation in battery disconnect units (BDUs) and onboard chargers where primary-side MCU controls secondary-side contactors and sensors. IC Role / Device Role / Timing Role: SI88222BC-IS delivers isolated 5 V power to secondary-side monitoring ICs while transmitting SOC/SOH status and fault flags across the barrier. Use Value: Reduces BOM count by integrating power and signal isolation, meeting ASIL-B functional safety requirements via certified architecture. |
| Programmable Logic Controllers | Isolated Data Acquisition Systems |
Use Scenario: Digital I/O module in distributed control systems requiring 24 V field-side isolation and local 3.3 V logic supply. IC Role / Device Role / Timing Role: SI88222BC-IS isolates discrete input status (24 V sinking) and drives isolated outputs, powered from local 5 V rail. Use Value: Eliminates need for separate isolated DC-DC converters per I/O channel, lowering thermal density and improving channel density. |
Use Scenario: High-precision sensor front-end in test equipment where analog-to-digital conversion occurs on isolated side to reject ground-loop noise. IC Role / Device Role / Timing Role: SI88222BC-IS powers ADC reference and digital interface (e.g., SPI clock/data) while isolating digital results to host processor. Use Value: Achieves >100 dB common-mode rejection at 50/60 Hz without external isolation components, preserving ENOB in 24-bit sigma-delta systems. |
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 |
|---|---|---|---|
| ADUM6223ARWZ | Two isolated 2.5 kVRMS channels; integrated 500 mW DC-DC; no programmable frequency or shutdown pin | Limited to low-power sensor interfaces; insufficient for driving gate drivers or powering MCUs | Select when only 500 mW isolated power is needed and board space is constrained |
| ISO7821FDWWR | Two 5000 VRMS channels; no integrated DC-DC - requires external isolated power supply | Requires additional transformer, rectifier, and regulator; increases design complexity and footprint | Select when existing isolated power architecture exists and only signal isolation is required |
Compared with ADUM6223ARWZ and ISO7821FDWWR, SI88222BC-IS uniquely combines 5000 VRMS isolation, 5 W peak DC-DC capability, and AEC-Q100 qualification in a single SOIC-16 package - enabling simplified, high-power, automotive-grade isolated subsystems without external power conversion circuitry.
Availability
SI88222BC-IS is available at Aetrix Electronics and suitable for industrial motor drives, EV traction inverters, and isolated data acquisition systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for SI88222BC-IS 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 Si88xx family was designed to replace optocoupler-based isolation with higher speed, lower power, and integrated power delivery - specifically targeting industrial automation, automotive electrification, and energy infrastructure systems.
FAQ
What is the maximum data rate supported by the SI88222BC-IS?
The SI88222BC-IS supports a maximum data rate of 100 Mbps across both isolation channels. This performance is guaranteed over the full operating temperature range (–40 °C to +125 °C) and enables use in high-speed digital interfaces such as isolated SPI, RS-485 transceivers, and digital current sensing links. The SI88222BC-IS achieves this using RF-based on/off keying modulation, which maintains signal integrity without requiring protocol-specific initialization sequences.
Does the SI88222BC-IS require an external transformer?
Yes, the SI88222BC-IS requires an external miniature transformer to operate its integrated isolated DC-DC converter. The device drives the transformer primary via the VSW pin and regulates output voltage using secondary-side feedback through the VSNS pin. Validated transformers include UMEC UTB02240s (5 kVRMS, 1:4 ratio) and Coilcraft TA7618-AL. No external transformer is needed for digital isolation functionality alone - that operates independently using the internal RF transceiver.
Can the SI88222BC-IS power external circuitry on the isolated side?
Yes, the SI88222BC-IS can deliver up to 2 W average (5 W peak) of regulated isolated power to external circuitry on the secondary side. This includes powering microcontrollers, gate drivers, ADCs, or sensors connected to VDDB and GNDB. The output voltage is set via resistor divider on VSNS and supports 3.3 V, 5.0 V, or >5.5 V (with VREGB and external NPN transistor). The SI88222BC-IS eliminates the need for a separate isolated DC-DC module in many applications.
What is the function of the SH pin on the SI88222BC-IS?
The SH (Shutdown) pin on the SI88222BC-IS is an active-high control input that disables the internal DC-DC converter when driven high. During shutdown, the digital isolation channels remain fully operational - allowing continued signal transmission while halting power generation. For normal operation, SH must be tied to GND. This feature enables system-level power sequencing and fault recovery without resetting the isolation logic path.
Is the SI88222BC-IS qualified for automotive applications?
Yes, the SI88222BC-IS is AEC-Q100 Grade 1 qualified (–40 °C to +125 °C) and built using automotive-specific manufacturing flows. It supports AIAG-compliant PPAP documentation and IMDS/CAMDS reporting. Its 5000 VRMS isolation rating, 100 kV/µs transient immunity, and fail-safe output mode make it suitable for battery management systems, on-board chargers, and traction inverter control units in hybrid and electric vehicles.
SI88222BC-IS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- 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:
- 16-SOIC
SI88222BC-IS FAQ
1.How can I place an order for SI88222BC-IS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88222BC-IS 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 SI88222BC-IS reliable?
The price and inventory of SI88222BC-IS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88222BC-IS is usually 5 days.
3.What payment methods are accepted for SI88222BC-IS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88222BC-IS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88222BC-IS?
SI88222BC-IS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88222BC-IS 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 SI88222BC-IS?
For technical support, including SI88222BC-IS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88222BC-IS requirements.
6.How does Aetrix verify that SI88222BC-IS is sourced from the original manufacturer or authorized distributors?
All SI88222BC-IS 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 SI88222BC-IS meets industry standards.
7.What is the process for return or replacement of SI88222BC-IS?
All SI88222BC-IS units undergo pre-shipment inspection (PSI). If there is an issue with SI88222BC-IS, 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 SI88222BC-IS part is unused and in its original packaging.
Return procedure for SI88222BC-IS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88222BC-IS Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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