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Skyworks Solutions Inc. SI88240EC-ASR
- Part No.:
- SI88240EC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88240EC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:1,031
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Product details
Overview
SI88240EC-ASR 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 provides four unidirectional isolation channels with 100 Mbps data rate, 23 ns max propagation delay, and 5000 VRMS reinforced isolation. It is used in industrial motor control and battery management systems where galvanic separation and local isolated power are required.
For engineers reviewing the SI88240EC-ASR datasheet, SI88240EC-ASR pinout, SI88240EC-ASR application, or SI88240EC-ASR equivalent, this page delivers verified specifications, SOIC-20 wide-body package mapping, functional pin roles, automotive-grade AEC-Q100 qualification status, and confirmed alternative parts for isolated signal + power designs.
Technical Context
The SI88240EC-ASR implements RF-based capacitive isolation across a silicon dioxide barrier, using on/off keying modulation for noise-immune digital channel operation without startup initialization. Its integrated flyback DC-DC controller operates at 250 kHz (fixed), supports soft-start via external capacitor on SS pin, and shuts down via SH pin assertion high.
Isolation is reinforced per UL 1577 (5000 VRMS), CSA/IEC 62368-1, and VDE 60747-17. The device senses output voltage on the secondary side (VSNS) and transmits error feedback across the barrier-eliminating optocouplers and enabling ±1% load regulation without external compensation components beyond RCOMP/CCOMP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements for industrial and automotive safety-critical interfaces. |
| Data Rate | Up to 100 Mbps - supports high-speed serial communication (e.g., SPI, RS-485 PHY control, CAN FD signaling). |
| Propagation Delay | 23 ns maximum - enables tight timing budgets in real-time motor control and closed-loop feedback paths. |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side microcontrollers, ADCs, gate drivers, and interface ICs. |
| 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 inverters and switching power supplies. |
| AEC-Q100 Grade | Qualified to Grade 1 - validated for automotive applications including traction inverters and BMS. |
Pinout & Package
SI88240EC-ASR 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, rated 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/VDDA; compatible with CMOS logic levels. |
| 5, 6 | GNDP, VSW | GNDP: primary-side power ground; VSW: internal switch output driving transformer primary winding. |
| 7, 8 | VDDP, VDDA | VDDP: primary-side DC-DC input supply (3–5.5 V); VDDA: primary-side isolator logic supply (same domain as GNDA). |
| 9, 10 | GNDA, SH | GNDA: primary-side signal ground; SH: active-high shutdown control for DC-DC converter (tie to GND for normal operation). |
| 11–14 | B1–B4 (Secondary-side outputs) | Unidirectional digital outputs referenced to GNDB/VDDB; electrically isolated from A-side with precise timing alignment. |
| 15, 16 | GNDB, VDDB | GNDB: secondary-side signal ground; VDDB: secondary-side isolator logic supply, powered by internal DC-DC output. |
| 17, 18 | DNC/VREGB, NC | DNC/VREGB: Do Not Connect when output ≤5.5 V; NC: no internal connection - leave floating or grounded per layout best practice. |
| 19, 20 | VSNS, COMP | VSNS: feedback sense input for DC-DC output voltage regulation; COMP: compensation node for error amplifier loop stability (RC network required). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based capacitive isolation | Eliminates magnetic coupling sensitivity and enables >100 kV/µs CMTI without ferrite shielding or layout constraints. |
| Secondary-side voltage sensing | Enables precise ±1% line/load regulation without optocouplers, reducing BOM count and improving long-term reliability. |
| Integrated soft-start (SS pin) | External capacitor programmability limits inrush current during power-up, preventing supply rail collapse in multi-rail systems. |
| Reinforced isolation certification | UL 1577, CSA 62368-1, VDE 60747-17 - allows single-component replacement of dual-package isolator + discrete DC-DC solutions. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use including junction temperature cycling, ESD, and EMC stress - supports PPAP documentation. |
Applications
| Industrial Motor Control | Battery Management Systems |
|---|---|
Use Scenario: Isolating gate driver signals and current-sense feedback in 3-phase inverter stacks for EV traction motors. IC Role / Device Role / Timing Role: Provides timing-aligned, low-propagation-delay isolation for PWM signals while powering secondary-side current-sense amplifiers and ADCs via its integrated DC-DC. Use Value: Eliminates separate isolated DC-DC converter, reduces PCB area by >30%, and maintains <5 ns channel-to-channel skew under 100 kHz switching. |
Use Scenario: Galvanically separating cell monitoring ICs and MCU communications in high-voltage battery packs (up to 1000 V bus). IC Role / Device Role / Timing Role: Transfers voltage/current/temperature telemetry across isolation barrier while supplying regulated 3.3 V to isolated analog front-ends. Use Value: Achieves system-level reinforced insulation with single-component solution, meeting ISO 6469-3 creepage requirements without additional spacing. |
| Programmable Logic Controllers | Isolated Switch-Mode Power Supplies |
Use Scenario: Isolating digital I/O modules and fieldbus interfaces (e.g., RS-485, CAN) in distributed control cabinets exposed to industrial EMI. IC Role / Device Role / Timing Role: Delivers noise-immune signal transmission with 100 kV/µs CMTI and powers isolated transceivers and level shifters from its secondary-side output. Use Value: Reduces susceptibility to ground loops and conducted transients, enabling reliable operation in 4–20 mA loop-powered systems. |
Use Scenario: Providing isolated bias supply and feedback path for secondary-side controllers in AC-DC and DC-DC converters. IC Role / Device Role / Timing Role: Replaces optocoupler + linear regulator combo by delivering regulated 5 V at 400 mA while transmitting voltage error across barrier. Use Value: Improves transient response time by 3× vs. optocoupler-based feedback, enabling faster load-step recovery in telecom rectifiers. |
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 |
|---|---|---|---|
| ADUM6420ARWZ | 4-channel isolator + 500 mW isolated DC-DC; SOIC-20; 25 Mbps max data rate; no AEC-Q100 qualification. | Limited to lower-power secondary loads (e.g., single transceiver); unsuitable for automotive under-hood deployment. | Select when 500 mW output suffices and AEC-Q100 is not required; lower cost but reduced timing performance. |
| ISO7844FDWW | 4-channel isolator only - no integrated DC-DC; requires external isolated power; SOIC-20; 100 Mbps; 100 kV/µs CMTI. | Demands external transformer, controller, and regulation circuitry - increases design complexity and footprint. | Select when full design flexibility over DC-DC topology is needed, or when existing isolated bias rails are available. |
Compared with ADUM6420ARWZ and ISO7844FDWW, SI88240EC-ASR uniquely combines AEC-Q100 qualification, 2 W isolated power, and 100 Mbps timing integrity in one SOIC-20 package - making it optimal for space-constrained automotive and industrial systems requiring both signal and power isolation.
Availability
SI88240EC-ASR is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and programmable logic controllers requiring stable component supply with automotive-grade reliability and long lifecycle support.
Supply support for SI88240EC-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.
The Si88x4x family was designed to replace optocoupler + discrete DC-DC combinations in high-reliability industrial and automotive systems, integrating robust isolation with efficient, certified isolated power in a single package.
FAQ
What is the maximum output power capability of the SI88240EC-ASR's integrated DC-DC converter?
The SI88240EC-ASR delivers up to 2 W average output power at 5.0 V on the secondary side. This is sufficient to power secondary-side microcontrollers, isolated transceivers, and analog front-ends. Peak power exceeds 5 W briefly during startup, but sustained operation is rated at 2 W under thermal limits specified in the datasheet. The SI88240EC-ASR achieves this using an internal switch and external miniature transformer.
Does the SI88240EC-ASR support adjustable DC-DC switching frequency?
No, the SI88240EC-ASR uses a fixed 250 kHz switching frequency for its internal DC-DC controller. Frequency adjustment is not supported on Si882xx variants - that capability is reserved for Si883xx and Si886xx families via the SH_FC and SS pins. For SI88240EC-ASR, the 250 kHz frequency is optimized for EMI performance and transformer size in standard 3–5 V input configurations.
Can the SI88240EC-ASR be used in automotive applications requiring AEC-Q100 compliance?
Yes, the SI88240EC-ASR is AEC-Q100 Grade 1 qualified and built using automotive-specific manufacturing flows. It supports operating temperatures from –40 °C to +125 °C and includes features such as thermal shutdown, cycle skipping at light loads, and reinforced isolation certified to UL, VDE, and CSA standards - all validated for automotive use cases like traction inverters and battery management systems.
What is the function of the SH pin on the SI88240EC-ASR?
The SH pin on the SI88240EC-ASR is an active-high shutdown control for the integrated DC-DC converter. When driven high (≥2.0 V), it disables the converter while leaving the digital isolation channels fully operational. For normal operation, SH must be tied to GNDA. This feature enables safe power sequencing and fault recovery in systems where isolated power must be disabled independently of signal isolation.
How does the SI88240EC-ASR achieve voltage regulation without an optocoupler?
The SI88240EC-ASR senses output voltage on the secondary side using the VSNS pin, encodes the error, and transmits it across the capacitive isolation barrier to the primary-side controller. This closed-loop feedback eliminates the need for optocouplers and their associated biasing circuitry, enabling tighter regulation (±1%), faster transient response, and higher reliability - all implemented within the SI88240EC-ASR itself.
SI88240EC-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:
- 4/0
- 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
SI88240EC-ASR FAQ
1.How can I place an order for SI88240EC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88240EC-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 SI88240EC-ASR reliable?
The price and inventory of SI88240EC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88240EC-ASR is usually 5 days.
3.What payment methods are accepted for SI88240EC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88240EC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88240EC-ASR?
SI88240EC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88240EC-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 SI88240EC-ASR?
For technical support, including SI88240EC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88240EC-ASR requirements.
6.How does Aetrix verify that SI88240EC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88240EC-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 SI88240EC-ASR meets industry standards.
7.What is the process for return or replacement of SI88240EC-ASR?
All SI88240EC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88240EC-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 SI88240EC-ASR part is unused and in its original packaging.
Return procedure for SI88240EC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88240EC-ASR Tags
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