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Skyworks Solutions Inc. SI88241EC-ISR
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- Part No.:
- SI88241EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88241EC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
SI88241EC-ISR 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, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and reinforced isolation rated at 5000 VRMS. It serves as a signal and power isolation solution in industrial motor control and battery management systems.
For engineers reviewing the SI88241EC-ISR datasheet, SI88241EC-ISR pinout, SI88241EC-ISR application, or SI88241EC-ISR equivalent, this device offers verified 4-channel unidirectional isolation, on-chip flyback controller with soft-start and shutdown, SOIC-20 wide-body packaging, and AEC-Q100 qualification for automotive-grade designs requiring robust transient immunity (100 kV/µs) and operation from –40 °C to +125 °C.
Technical Context
The SI88241EC-ISR implements RF-based on/off keying across a silicon dioxide capacitive barrier for each of its four unidirectional isolation channels, eliminating startup initialization and providing inherent noise immunity. Its integrated 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 uses internal power switches (VSW), supports 3.3 V/5.0 V input-to-output conversion, includes SH shutdown control (Pin 6), and features fixed 250 kHz switching frequency - distinct from Si883xx/Si886xx variants offering programmable frequency and external switch drive (ESW/RSN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577, VDE 62368-1 reinforced) |
| Data Rate | Up to 100 Mbps - enables high-speed serial interface isolation (e.g., SPI, RS-485, CAN FD physical layer) |
| Propagation Delay | ≤23 ns max - ensures tight timing alignment in real-time control loops |
| DC-DC Output Power | 2 W average at 3.3 V or 5.0 V - sufficient to power secondary-side logic and small peripherals without external regulators |
| Operating Temperature | –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 drives and inverters |
| Regulatory Certifications | UL, CSA, VDE, CQC, AEC-Q100 Grade 1 - meets functional safety requirements for ASIL-B systems |
Pinout & Package
SI88241EC-ISR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 7.5 mm, 1.0 mm height) with creepage/clearance ≥8.3 mm, optimized for reinforced insulation per IEC 62368-1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | A1–A4, GNDA, SH | Primary-side digital inputs (A1–A4), primary ground (GNDA), and shutdown control (SH active-high) |
| 9, 10, 11, 12, 15, 16, 17, 18, 19, 20 | B1–B4, GNDB, VDDB, GNDP, VDDP, VDDA, VSNS, COMP, DNC/VREGB | Secondary-side digital outputs (B1–B4), secondary ground (GNDB), secondary supply (VDDB), primary power ground (GNDP), primary power input (VDDP), primary signal supply (VDDA), feedback sense (VSNS), compensation (COMP), and do-not-connect reference (DNC/VREGB) |
| 7, 8, 13, 14 | VSW, HF XMTR/RCVR | Internal switch output (VSW) and four high-frequency transmitter/receiver pairs for isolation channels |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates need for initialization sequence and provides immunity to magnetic fields and EMI without external bias components |
| Integrated flyback DC-DC controller | Enables single-component isolated power + signal transfer - reduces BOM count vs. discrete isolator + separate DC-DC |
| Secondary-side voltage sensing (VSNS) | Delivers superior line/load regulation (<±1.5%) without optocouplers or secondary-side error amplifiers |
| Soft-start and shutdown (SH, SS pins) | Prevents inrush current during power-up and allows safe system-level power sequencing |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including traction inverter gate drivers and battery monitoring units |
Applications
| Industrial Motor Control | Automotive Battery Management |
|---|---|
|
Use Scenario: Isolating PWM signals and fault feedback between MCU and IGBT gate drivers in servo drives. IC Role / Device Role / Timing Role: Quad-channel isolator transmits gate enable/disable and desaturation fault signals across 5 kVRMS barrier; DC-DC powers driver ICs. Use Value: Enables compact, high-reliability gate drive stage with no external isolated power supply required. |
Use Scenario: Monitoring cell voltages and temperature sensors in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Isolates analog front-end ADC interface and microcontroller communication while powering isolated ADC and LDOs. Use Value: Meets ASIL-B diagnostic coverage requirements with certified reinforced insulation and <23 ns channel matching. |
| PLC Digital I/O Modules | Isolated Switch-Mode Power Supply Feedback |
|
Use Scenario: Providing isolated digital input/output for field devices in distributed control systems. IC Role / Device Role / Timing Role: Four independent channels isolate status inputs and control outputs; integrated DC-DC powers remote sensors and actuators. Use Value: Reduces module footprint by replacing four discrete isolators + isolated DC-DC with one SOIC-20 component. |
Use Scenario: Closing feedback loop for isolated DC-DC converters in telecom and server PSUs. IC Role / Device Role / Timing Role: Replaces optocoupler-based feedback with precision secondary-side voltage sensing (VSNS) and isolated error transmission. Use Value: Improves load regulation to ±1.2% and eliminates optocoupler aging drift over 10+ year service life. |
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 |
|---|---|---|---|
| SI88240EC-ISR | Same SOIC-20 package and pinout; differs only in default failsafe state (A1–A4 low vs. high on power loss) | Suitable where fail-safe logic requires deactivation on power interruption (e.g., emergency stop circuits) | Select SI88240EC-ISR when system safety mandates low-state default on isolation barrier loss |
| ADUM6421ARWZ | 4-channel isolator + isolated DC-DC; 5000 VRMS rating but lower 2.5 W peak power, 50 Mbps max data rate, and no AEC-Q100 qualification | Targeted at industrial automation, not automotive; lacks thermal shutdown and cycle-skipping optimization | Choose ADUM6421ARWZ only for non-automotive designs where 50 Mbps suffices and AEC-Q100 is unnecessary |
Compared with SI88241EC-ISR, SI88240EC-ISR offers identical performance with inverted failsafe behavior, while ADUM6421ARWZ trades automotive qualification and 100 Mbps capability for broader industrial distributor availability - making SI88241EC-ISR optimal for ASIL-B motor control and BMS where timing, reliability, and certification are critical.
Availability
SI88241EC-ISR is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and PLC digital I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for SI88241EC-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 to replace optocouplers and discrete isolator + DC-DC combinations in high-reliability industrial and automotive systems demanding reinforced isolation, precise timing, and integrated power.
FAQ
What is the maximum data rate supported by SI88241EC-ISR?
The SI88241EC-ISR supports a maximum data rate of 100 Mbps per channel. This is confirmed in the Skyworks datasheet Section 1 and Table 1, enabling use in high-speed interfaces such as isolated SPI, RS-485 transceivers, and digital encoder feedback links. The SI88241EC-ISR achieves this with sub-23 ns propagation delay and minimal pulse-width distortion.
Does SI88241EC-ISR require external components for DC-DC operation?
Yes, SI88241EC-ISR requires an external miniature transformer, input/output capacitors, and a Schottky rectifier diode to implement its isolated DC-DC function. The datasheet Figure 7 specifies C1, C2, C3, T1, and D1 as mandatory. No external FET or current sense resistor is needed - unlike Si884xx/Si886xx variants - because SI88241EC-ISR uses internal power switches (VSW).
What is the function of the SH pin on SI88241EC-ISR?
The SH pin (Pin 6) on SI88241EC-ISR is an active-high shutdown control for the integrated DC-DC converter. When driven high, it disables switching and places the converter in low-power state; when grounded, normal operation resumes. This feature enables system-level power sequencing and fault-induced isolation barrier disable - a capability documented in Section 2.3.1 of the SI88x4x datasheet.
Is SI88241EC-ISR qualified for automotive applications?
Yes, SI88241EC-ISR is AEC-Q100 Grade 1 qualified (–40 °C to +125 °C) and built using automotive-specific manufacturing flows. It carries UL, VDE, and CQC certifications for reinforced insulation and is explicitly listed for hybrid/electric vehicle applications including traction inverters and battery management systems in the official Skyworks documentation.
How does SI88241EC-ISR achieve voltage regulation on the isolated side?
SI88241EC-ISR uses secondary-side voltage sensing via the VSNS pin, where a resistor divider scales the output voltage to match an internal 1.22 V reference. The error signal is encoded and transmitted across the isolation barrier to adjust the primary-side duty cycle - eliminating optocouplers and ensuring ±1.5% load regulation. This architecture is detailed in Section 2.3.6 and Figure 7 of the SI88x4x datasheet.
SI88241EC-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:
- 3/1
- 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
SI88241EC-ISR FAQ
1.How can I place an order for SI88241EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88241EC-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 SI88241EC-ISR reliable?
The price and inventory of SI88241EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88241EC-ISR is usually 5 days.
3.What payment methods are accepted for SI88241EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88241EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88241EC-ISR?
SI88241EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88241EC-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 SI88241EC-ISR?
For technical support, including SI88241EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88241EC-ISR requirements.
6.How does Aetrix verify that SI88241EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88241EC-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 SI88241EC-ISR meets industry standards.
7.What is the process for return or replacement of SI88241EC-ISR?
All SI88241EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88241EC-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 SI88241EC-ISR part is unused and in its original packaging.
Return procedure for SI88241EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88241EC-ISR Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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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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