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Skyworks Solutions Inc. SI88242EC-ISR
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- Part No.:
- SI88242EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88242EC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,126
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Product details
Overview
SI88242EC-ISR from Skyworks Solutions is a quad-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W regulated 3.3 V or 5.0 V output on the secondary side. It features four unidirectional isolation channels, 100 Mbps data rate capability, 23 ns max propagation delay, and 5000 VRMS reinforced isolation. It is used in industrial motor control systems requiring galvanic separation of gate drivers and feedback signals.
For engineers reviewing the SI88242EC-ISR datasheet, SI88242EC-ISR pinout, SI88242EC-ISR application, or SI88242EC-ISR equivalent, this device supports high-noise environments such as inverters and PLCs where precise timing, low EMI, and fail-safe operation under transient stress are critical selection criteria.
Technical Context
The SI88242EC-ISR implements RF-based capacitive isolation across a silicon dioxide barrier, using on/off keying modulation for superior noise immunity and magnetic field rejection. Its integrated flyback DC-DC controller operates at a default 250 kHz switching frequency and supports soft-start via external capacitor on SS pin.
It uses internal power switches (VSW) for low-voltage configurations (3–5.5 V input), includes shutdown control via SH pin, and senses output voltage on the isolated side (VSNS) for precise regulation without optocouplers. Thermal shutdown and cycle-skipping at light loads enhance reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for one minute - meets UL 1577, CSA 62368-1, VDE 62368-1, and CQC GB4943.1 for reinforced insulation. |
| Data Rate | Up to 100 Mbps - enables high-speed serial communication in servo drives and real-time control loops. |
| Propagation Delay | 23 ns maximum - ensures tight timing alignment between isolated control and feedback paths. |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side logic, ADC references, and gate drivers without external regulators. |
| Operating Temperature | –40 °C to +125 °C - qualified for automotive-grade use and harsh industrial environments. |
| Transient Immunity | 100 kV/µs typical - maintains signal integrity during fast-switching events in motor drives and inverters. |
| Package | SOIC-20 wide-body - provides 8.3 mm creepage/clearance for reinforced isolation compliance. |
Pinout & Package
SI88242EC-ISR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 7.5 mm, 2.35 mm height) with 0.65 mm pitch and reinforced creepage/clearance for 5000 VRMS isolation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | A1–A4 (Primary-side inputs) | Unidirectional digital input channels referenced to GNDA; accept CMOS/TTL logic levels. |
| 5, 6 | GNDP, VSW | GNDP is primary-side power ground; VSW is internal switch output driving transformer primary. |
| 7, 8 | VDDP, VDDA | VDDP powers internal DC-DC primary stage; VDDA supplies primary-side digital logic (3.3/5 V). |
| 9, 10 | GNDA, SH | GNDA is primary-side signal ground; SH is active-high shutdown control for DC-DC converter. |
| 11–14 | B1–B4 (Secondary-side outputs) | Isolated unidirectional digital outputs referenced to GNDB; drive CMOS loads on isolated side. |
| 15, 16 | GNDB, VDDB | GNDB is secondary-side signal ground; VDDB is regulated output supply (3.3/5 V) for isolated logic. |
| 17, 18 | DNC/VREGB, NC | DNC/VREGB is Do-Not-Connect unless output > 5.5 V; NC is internally unconnected. |
| 19, 20 | VSNS, COMP | VSNS senses isolated output voltage via resistor divider; COMP sets loop compensation with R/C network. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based capacitive isolation | Eliminates magnetic coupling susceptibility and enables stable operation in high-dv/dt motor drive environments. |
| Secondary-side voltage sensing | Enables precise load regulation without optocouplers or auxiliary bias windings, reducing BOM count and improving long-term reliability. |
| Programmable soft-start | External capacitor on SS pin controls inrush current limiting, preventing input rail collapse during power-up in multi-rail systems. |
| Integrated shutdown (SH pin) | Allows system-level fault response by disabling DC-DC output while preserving isolation channel functionality. |
| Thermal shutdown protection | Prevents permanent damage during sustained overload or ambient temperature excursions beyond rated limits. |
Applications
| Industrial Motor Control | Isolated Switch-Mode Power Supply |
|---|---|
Use Scenario: Gate driver isolation in three-phase IGBT/SiC inverter stages with feedback loop closure across isolation barrier. IC Role / Device Role / Timing Role: Provides timing-aligned isolated PWM inputs and current-sense feedback signals with sub-25 ns skew. Use Value: Enables safe operation at 1000 V bus voltages while maintaining <100 ps channel-to-channel skew for synchronous switching. |
Use Scenario: Isolated auxiliary supply generation for control ICs and sensors in offline AC-DC converters. IC Role / Device Role / Timing Role: Delivers regulated 5 V at 400 mA to secondary-side supervisor, ADC, and communication interfaces. Use Value: Replaces discrete transformer + regulator + optocoupler solution, reducing footprint by >40% and eliminating aging-related drift. |
| Programmable Logic Controller (PLC) | Battery Management System (BMS) |
Use Scenario: Digital I/O module isolation for field-side digital inputs/outputs interfacing with 24 V industrial buses. IC Role / Device Role / Timing Role: Transmits status and command signals across isolation barrier with fail-safe default output states. Use Value: Meets IEC 61000-4-5 surge immunity requirements and supports hot-swap capability without latch-up. |
Use Scenario: Cell voltage monitoring and balancing control isolation in high-voltage EV battery packs (up to 900 V). IC Role / Device Role / Timing Role: Isolates analog front-end SPI interface and delivers isolated 3.3 V to ADC reference and microcontroller peripherals. Use Value: Achieves AEC-Q100 Grade 0 qualification and supports functional safety ASIL-D decomposition per ISO 26262. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel isolated DC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6420ARWZ | 4-channel isolator with 500 mW isolated 3.3 V output; uses iCoupler® transformer-based isolation; no programmable frequency or soft-start. | Limited to lower-power secondary-side loads; lacks SH/SS pins for system-level control; lower isolation rating (3750 VRMS). | Choose ADUM6420ARWZ when board space is constrained and <500 mW isolated power suffices. |
| ISO7842FDWR | 4-channel isolator only - no integrated DC-DC; requires external isolated power supply; 100 Mbps, 11 ns prop delay. | Demands separate isolated DC-DC solution (e.g., transformer + controller), increasing design complexity and component count. | Choose ISO7842FDWR when higher timing precision (<12 ns) is required and external power architecture is already standardized. |
Compared with ADUM6420ARWZ and ISO7842FDWR, SI88242EC-ISR uniquely integrates 2 W regulated isolated power with full system control (SH, SS, VSNS, COMP), enabling self-contained isolation in space-constrained industrial and automotive modules without compromising on safety certification or thermal robustness.
Availability
SI88242EC-ISR is available at Aetrix Electronics and suitable for industrial motor control, isolated power supply design, and battery management systems requiring stable component supply, long lifecycle support, and AEC-Q100-compliant performance.
Supply support for SI88242EC-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 Si88x4x family was designed specifically for high-reliability industrial and automotive applications demanding integrated signal isolation and regulated isolated power in a single package, eliminating optocouplers and discrete DC-DC stages.
FAQ
What is the maximum isolated output power of the SI88242EC-ISR?
The SI88242EC-ISR delivers up to 2 W average isolated output power at 5.0 V on the secondary side. This is sufficient to power secondary-side logic, ADC references, and gate driver ICs without requiring additional regulators. Peak power capability reaches 5 W briefly, but continuous operation is rated at 2 W under thermal limits specified in the datasheet.
Does the SI88242EC-ISR support adjustable DC-DC switching frequency?
The SI88242EC-ISR operates at a fixed default switching frequency of 250 kHz and does not support user-adjustable frequency. Frequency adjustment is available only on Si883xx and Si886xx variants via the SH_FC and SS pins. For SI88242EC-ISR, frequency is internally trimmed and not externally configurable.
Can the SI88242EC-ISR be used in automotive applications?
Yes, the SI88242EC-ISR is AEC-Q100 qualified and built using automotive-specific manufacturing flows. It supports –40 °C to +125 °C operation, includes AIAG-compliant PPAP documentation, and meets reinforced insulation requirements for traction inverters and battery management systems in hybrid/electric vehicles.
What is the function of the DNC/VREGB pin on the SI88242EC-ISR?
The DNC/VREGB pin on the SI88242EC-ISR must be left unconnected (DNC) when the isolated output voltage is ≤ 5.5 V. It functions as a Zener-referenced voltage output only when the DC-DC output exceeds 5.5 V - in which case it serves as a reference for external regulation circuitry. Misconnecting this pin in ≤5.5 V designs may disrupt regulation.
How does the SI88242EC-ISR achieve precise output voltage regulation without optocouplers?
The SI88242EC-ISR senses the isolated output voltage directly on the secondary side using the VSNS pin and transmits the error signal back across the isolation barrier via an internal feedback path to the primary-side controller. This closed-loop architecture eliminates optocouplers and associated aging, temperature drift, and biasing complexity while maintaining ±3% output regulation over line, load, and temperature.
SI88242EC-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:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- 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
SI88242EC-ISR FAQ
1.How can I place an order for SI88242EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88242EC-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 SI88242EC-ISR reliable?
The price and inventory of SI88242EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88242EC-ISR is usually 5 days.
3.What payment methods are accepted for SI88242EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88242EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88242EC-ISR?
SI88242EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88242EC-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 SI88242EC-ISR?
For technical support, including SI88242EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88242EC-ISR requirements.
6.How does Aetrix verify that SI88242EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88242EC-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 SI88242EC-ISR meets industry standards.
7.What is the process for return or replacement of SI88242EC-ISR?
All SI88242EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88242EC-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 SI88242EC-ISR part is unused and in its original packaging.
Return procedure for SI88242EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88242EC-ISR Tags
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