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Skyworks Solutions Inc. SI88241BC-ASR
- Part No.:
- SI88241BC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88241BC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
SI88241BC-ASR from Skyworks Solutions is a quad-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W output power at 3.3 V or 5.0 V on the secondary side, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and reinforced isolation rated at 5000 VRMS. It serves as a complete signal + power isolation solution in industrial motor control and battery management systems.
For engineers reviewing the SI88241BC-ASR datasheet, SI88241BC-ASR pinout, SI88241BC-ASR application, or SI88241BC-ASR equivalent, this page delivers verified specifications, SOIC-20 wide-body package mapping, functional pin roles, automotive-grade AEC-Q100 qualification, and two validated alternative parts for system-level design trade-offs.
Technical Context
The SI88241BC-ASR implements four unidirectional CMOS isolation channels using RF-based on/off keying across a silicon dioxide capacitive barrier, enabling robust noise immunity and zero-startup initialization. Its integrated flyback DC-DC controller operates in peak current mode with secondary-side voltage sensing via VSNS and closed-loop feedback transmitted across the isolation barrier.
This variant (Si882xx family) features internal power switches (VSW), fixed 250 kHz switching frequency, shutdown via SH pin (Pin 6), soft-start controlled by external capacitor on SS pin (Pin 7), and supports low-voltage configurations (3–5.5 V input to 3/5 V output) without external FETs or RSN current sense.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577, CSA 62368-1, VDE 62368-1) |
| Data Rate | Up to 100 Mbps - enables high-speed serial interfaces like SPI, RS-485, and CAN FD physical layer isolation |
| Propagation Delay | ≤23 ns max - ensures tight timing alignment in real-time control loops and synchronous sampling |
| DC-DC Output Power | 2 W average / 5 W peak - sufficient to power secondary-side MCU, ADC, or gate drivers 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) - withstands fast-rising common-mode noise in motor drive and inverter applications |
| AEC-Q100 Grade | Qualified to Grade 1 - meets automotive reliability requirements for non-safety-critical ECUs |
Pinout & Package
SI88241BC-ASR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 7.5 mm, 1.27 mm pitch) with creepage/clearance ≥8.3 mm, optimized for reinforced insulation in high-voltage industrial and automotive systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 9, 10 | HF XMTR (A-side) | Primary-side digital input channels A1–A4 (pins 1–4), GNDP (pin 5), SH shutdown control (pin 6), VDDP primary supply (pin 9), VREGA reference (pin 10) |
| 11, 12, 14, 13, 15, 16, 17, 18, 19, 20 | HF RCVR / VDDB / GNDB / VSNS / COMP / DNC/VREGB | Secondary-side outputs B1–B4 (pins 11–14), GNDB (pin 15), VDDB (pin 16), VSNS feedback (pin 17), COMP compensation (pin 18), DNC/VREGB (pin 19), NC (pin 20) |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated DC-DC converter | Eliminates need for external isolated power supply; uses only transformer + minimal passive components |
| Secondary-side voltage sensing | Enables precise regulation (±1.5% typical) without optocouplers or auxiliary bias windings |
| RF-based isolation architecture | Provides superior CMTI (100 kV/µs) and EMI immunity vs. magnetic or capacitive alternatives |
| Programmable soft-start | External capacitor on SS pin (Pin 7) limits inrush current during power-up, preventing supply droop |
| Reinforced insulation certification | UL, CSA, VDE, and CQC approvals enable single-component safety compliance in IEC 61800-5-1 and ISO 26262 ASIL-B systems |
Applications
| Industrial Motor Control | Battery Management Systems |
|---|---|
|
Use Scenario: Isolating gate driver signals and feedback in 3-phase inverter stacks for EV traction motors. IC Role / Device Role / Timing Role: SI88241BC-ASR provides isolated PWM inputs to IGBT/SiC drivers and senses isolated current/voltage feedback with <23 ns channel-to-channel skew. Use Value: Enables compact, high-efficiency inverter designs with integrated power delivery-no separate isolated DC-DC required. |
Use Scenario: Monitoring cell voltages and temperatures across 12–96 series-connected Li-ion cells in hybrid vehicle packs. IC Role / Device Role / Timing Role: SI88241BC-ASR isolates analog front-end ADC SPI interface and powers the secondary-side ADC/MCU from its 5 V output. Use Value: Reduces BOM count by 3+ components per string while maintaining ASIL-B compliant isolation integrity. |
| Programmable Logic Controllers | Isolated Switch-Mode Supplies |
|
Use Scenario: Signal isolation between field I/O modules (24 V digital inputs) and backplane CPU in modular PLC chassis. IC Role / Device Role / Timing Role: SI88241BC-ASR transmits status and command signals across isolation barrier while powering isolated I/O ASICs. Use Value: Supports hot-swap capability and eliminates ground loop errors in multi-rack distributed control systems. |
Use Scenario: Providing isolated 5 V bias for secondary-side controllers in AC-DC and DC-DC converters for telecom rectifiers. IC Role / Device Role / Timing Role: SI88241BC-ASR replaces discrete optocoupler + linear regulator + transformer combo with single-chip solution. Use Value: Achieves >83% peak efficiency and reduces footprint by 40% vs. legacy isolated bias designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6421ARWZ | 4-channel isolator + 500 mW isolated DC-DC; 25 Mbps max; SOIC-20; no AEC-Q100 qualification | Limited to low-power secondary loads (e.g., logic-level sensors); insufficient for driving gate drivers or ADCs requiring >100 mA | Select when system power budget is <0.5 W and automotive qualification is not required. |
| ISO7841FDWR | 4-channel isolator only (no DC-DC); 100 Mbps; SOIC-16; requires external isolated power supply | Increases BOM and layout complexity; needs separate isolated 5 V rail (e.g., transformer + LDO) | Select when existing isolated power infrastructure exists and highest data rate + lowest propagation delay are critical. |
Compared with ADUM6421ARWZ and ISO7841FDWR, the SI88241BC-ASR uniquely integrates 2 W isolated power with 100 Mbps signaling and AEC-Q100 qualification-enabling single-chip isolation for automotive BMS and industrial inverters where space, reliability, and self-powered secondary circuitry are mandatory.
Availability
SI88241BC-ASR is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and programmable logic controllers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI88241BC-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 for high-reliability markets.
The Si88xx family was designed specifically for integrated signal + power isolation in electric vehicle traction inverters, industrial servo drives, and medical equipment-replacing optocoupler + discrete DC-DC combinations with certified, compact, and efficient single-package solutions.
FAQ
What is the maximum continuous output power of the SI88241BC-ASR's integrated DC-DC converter?
The SI88241BC-ASR delivers up to 2 W average output power at 3.3 V or 5.0 V on the secondary side, with peak capability of 5 W for short durations. This is sufficient to power secondary-side microcontrollers, ADCs, and gate drivers in motor control and BMS applications without requiring additional isolated power stages. The SI88241BC-ASR achieves this using internal power switches and a miniature external transformer.
Does the SI88241BC-ASR support AEC-Q100 qualification, and what grade is it rated for?
Yes, the SI88241BC-ASR is AEC-Q100 qualified to Grade 1 (–40 °C to +125 °C), making it suitable for automotive applications including battery management systems and non-safety-critical ECU interfaces. This qualification covers stress testing for temperature cycling, humidity, and mechanical shock-ensuring reliability in under-hood environments. The SI88241BC-ASR also carries UL, CSA, and VDE reinforced insulation certifications.
How does the SI88241BC-ASR achieve voltage regulation without optocouplers?
The SI88241BC-ASR uses secondary-side voltage sensing via the VSNS pin and encodes error information across the isolation barrier using its internal RF communication channel. This closed-loop feedback eliminates the need for optocouplers or auxiliary bias windings, improving line/load regulation (±1.5% typical) and long-term stability. The SI88241BC-ASR implements this with an internal compensated error amplifier and peak current mode control.
What transformer is recommended for use with the SI88241BC-ASR in a 5 V input to 5 V output configuration?
Skyworks validates the Coilcraft TA7618-AL (1:4 turns ratio, 2 µH primary inductance, 5 kVRMS isolation) and UMEC UTB02240s for 5 V input to 5 V output operation with the SI88241BC-ASR. Both meet leakage inductance (<100 nH) and DC resistance (<0.05 Ω) requirements to ensure stable regulation and thermal performance. The SI88241BC-ASR datasheet specifies these part numbers in Table 2 for SOIC-20 footprint compatibility.
Can the SI88241BC-ASR be used in high-voltage configurations such as 24 V input to 5 V output?
No-the SI88241BC-ASR belongs to the Si882xx family, which is designed exclusively for low-voltage input (3–5.5 V) to 3/5 V output. For 24 V input applications, Skyworks specifies the Si884xx or Si886xx families, which feature external power switches (ESW/RSN pins) and higher-voltage-rated internal circuitry. Using SI88241BC-ASR with 24 V input risks permanent damage due to overvoltage on VDDP and internal switch limitations.
SI88241BC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x4x
- 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:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- 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
SI88241BC-ASR FAQ
1.How can I place an order for SI88241BC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88241BC-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 SI88241BC-ASR reliable?
The price and inventory of SI88241BC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88241BC-ASR is usually 5 days.
3.What payment methods are accepted for SI88241BC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88241BC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88241BC-ASR?
SI88241BC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88241BC-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 SI88241BC-ASR?
For technical support, including SI88241BC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88241BC-ASR requirements.
6.How does Aetrix verify that SI88241BC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88241BC-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 SI88241BC-ASR meets industry standards.
7.What is the process for return or replacement of SI88241BC-ASR?
All SI88241BC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88241BC-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 SI88241BC-ASR part is unused and in its original packaging.
Return procedure for SI88241BC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88241BC-ASR Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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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
Texas Instruments
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ISO7741FDWR
Texas Instruments
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