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Skyworks Solutions Inc. SI83404BAA-IFR
- Part No.:
- SI83404BAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404BAA-IFR.pdf
- Description:
- 4 CH. ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
SI83404BAA-IFR from Skyworks Solutions is a 4-channel isolated high-side smart switch IC for industrial control, delivering 0.7 A continuous current per channel (RON = 155 mΩ), 1.5 kVRMS galvanic isolation, and full fault protection including overcurrent, overtemperature, and undervoltage monitoring. It drives solenoids, relays, and lamps in PLC I/O modules with 10 µs update rate and parallel logic interface.
For engineers reviewing the SI83404BAA-IFR datasheet, SI83404BAA-IFR pinout, SI83404BAA-IFR application, or SI83404BAA-IFR equivalent, key selection considerations include its 4-channel sourcing configuration, 9–32 V switch supply range, absence of SPI interface, presence of channel status indicators (LED1–LED4), and compatibility with 2.25–5.5 V MCUs in space-constrained industrial designs.
Technical Context
The SI83404BAA-IFR implements four independent high-side switches using RF-based CMOS isolation, eliminating optocoupler aging and enabling >100 kV/µs CMTI. Each channel integrates voltage, current, and temperature sensing with autonomous protection logic that constrains output or initiates controlled shutdown without host intervention.
It uses a multi-voltage smart output clamp to handle unlimited demagnetization energy (EAS) during inductive turn-off while maintaining fast switching speed. Control is via dedicated parallel inputs and an asynchronous OE pin - no SPI - with diagnostics reported through open-drain LEDn pins and FLT indicator rather than register reads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 independent high-side sourcing switches |
| Continuous Current | 0.7 A per channel at 25 °C ambient |
| ON-State Resistance | 155 mΩ typical per channel, minimizing conduction loss |
| Isolation Rating | 1.5 kVRMS for 1 minute, UL 1577 recognized |
| Logic Supply Range | 2.25 V–5.5 V, compatible with low-power MCUs |
| Switch Supply Range | 9 V–32 V, supports standard industrial DC bus voltages |
| Update Rate | 10 µs maximum propagation delay (tPLH/tPHL) |
| Operating Temperature | −40 °C to +125 °C junction, suitable for harsh environments |
Pinout & Package
SI83404BAA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface; accepts 2.25–5.5 V |
| VDD2 | Switch supply input | Powers all 4 high-side outputs; 9–32 V range |
| GND1 / GND2 | Logic / power ground | Galvanically isolated grounds separated by internal barrier |
| OE | Asynchronous output enable | Active-high global enable; disables all outputs when low |
| A1–A4 | Parallel logic inputs | Direct control of each channel; high = ON, low = OFF |
| B1–B4 | High-side switch outputs | Source current to load; rated 0.7 A continuous per channel |
| LED1–LED4 | Channel status indicators | Open-drain, active-low outputs reflecting real-time Bn state |
| FLT | Fault indicator | Open-drain, active-low signal asserting on any detected fault condition |
| DNC / NC | No-connect terminals | Not internally connected; must be left unconnected or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| RF-based CMOS isolation | Eliminates LED degradation and lifetime drift vs. optocouplers; >100 kV/µs CMTI |
| Smart output clamp | Handles unlimited EAS during inductive turn-off while enabling fast demagnetization |
| Multi-level fault protection | Autonomous overcurrent, overtemperature, and undervoltage response without MCU involvement |
| Parallel-only interface | No SPI required; simplifies migration from legacy optocoupler + driver solutions |
| Real-time channel feedback | Four dedicated LEDn pins provide immediate visual/status confirmation per channel |
| Industrial safety compliance | UL 1577 (1500 Vrms), IEC 61131-2, and CQC GB4943.1 certified |
Applications
| Programmable Logic Controllers (PLC) | Industrial Data Acquisition Systems |
|---|---|
Use Scenario: Digital output module driving 24 VDC solenoids and indicator lamps in modular PLC backplanes. IC Role / Device Role / Timing Role: High-side switch providing galvanically isolated, current-limited drive with real-time status feedback to controller. Use Value: Enables direct MCU-level control of field loads without external drivers or optocouplers, reducing bill-of-materials and board area. | Use Scenario: Remote I/O node acquiring sensor data and controlling actuators in factory-floor distributed control networks. IC Role / Device Role / Timing Role: Isolated output stage translating microcontroller logic signals into robust 9–32 V load drive with built-in diagnostics. Use Value: Eliminates need for discrete protection circuitry and provides immediate fault visibility via LEDn/FLT pins, accelerating field troubleshooting. |
| Motion Controllers | Smart Solid-State Relays |
Use Scenario: Compact servo drive interface managing brake release coils and limit switch indicators in CNC motion systems. IC Role / Device Role / Timing Role: Fast-turning (10 µs) high-side switch with thermal derating and overcurrent limiting for intermittent inductive loads. Use Value: Prevents coil burnout during stall conditions and enables predictive maintenance via continuous temperature monitoring. | Use Scenario: DIN-rail mounted solid-state relay replacing electromechanical relays in HVAC and lighting control panels. IC Role / Device Role / Timing Role: Four-channel isolated output with integrated clamp and diagnostics, replacing discrete MOSFET + opto + protection designs. Use Value: Achieves >10⁷ cycle life with zero contact arcing, while LEDn pins allow panel-mounted status indication without additional logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side isolated switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83404AAA-IFR | Includes Inrush Current Mode (8 A for 20 ms); same pinout and package | Required for lamp load pre-heat or cold filament surge handling | Select SI83404AAA-IFR only if inrush capability is needed; otherwise SI83404BAA-IFR offers lower cost and identical core functionality |
| SI83414BAA-IFR | 4-channel low-side sinking configuration; identical electrical specs except output polarity | Suitable where load return path is common and high-side sourcing is not feasible | Choose SI83414BAA-IFR only when circuit topology mandates sink-drive; SI83404BAA-IFR remains optimal for standard high-side PLC outputs |
Compared with SI83404AAA-IFR, SI83404BAA-IFR omits inrush mode but reduces system complexity and cost where lamp loads are absent; versus SI83414BAA-IFR, it provides sourcing topology essential for floating-load configurations in industrial I/O, avoiding redesign of load-side wiring.
Availability
SI83404BAA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial data acquisition systems, and motion controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SI83404BAA-IFR 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 Si834x product line was designed specifically for industrial automation, replacing optocoupler-based relay drivers with integrated, intelligent, and safety-certified isolated switches capable of self-protection and real-time diagnostics.
FAQ
What is the maximum continuous output current per channel for SI83404BAA-IFR?
The SI83404BAA-IFR delivers 0.7 A continuous current per channel at 25 °C ambient temperature, with RON = 155 mΩ typical. Derating applies above 25 °C per the thermal characteristics in the datasheet. This rating assumes proper PCB copper area and thermal management per Skyworks' recommended layout for the DFN-32 package.
Does SI83404BAA-IFR support SPI communication?
No, SI83404BAA-IFR does not support SPI. It uses a parallel logic interface only - inputs A1–A4 and OE - with diagnostics reported via open-drain LEDn and FLT pins. For SPI-capable variants, consider SI83408BDA-IFR or SI83418BDA-IFR, which share the same 4-channel sourcing architecture but add SPI registers.
What isolation rating does SI83404BAA-IFR meet?
SI83404BAA-IFR is UL 1577 recognized for 1.5 kVRMS withstand voltage for 1 minute across its isolation barrier. It also meets CSA 62368-1 and CQC GB4943.1 safety standards, and complies with IEC 61131-2 for industrial control equipment.
Can SI83404BAA-IFR drive inductive loads like solenoids safely?
Yes, SI83404BAA-IFR includes a patented multi-voltage smart output clamp that handles unlimited demagnetization energy (EAS) during inductive turn-off. This prevents voltage overshoot and enables fast, arc-free switching - critical for solenoid and relay coil control in PLC outputs.
What is the operating temperature range for SI83404BAA-IFR?
SI83404BAA-IFR operates from −40 °C to +125 °C junction temperature, validated across its full electrical specification. This range supports deployment in unventilated control cabinets, outdoor enclosures, and high-ambient industrial environments without derating penalties up to 105 °C ambient under proper thermal design.
SI83404BAA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.5µs, 4.5µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 2µs, -
- Voltage - Supply:
- 2.25V ~ 5.5V, 9V ~ 32V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-DFN (9x9)
SI83404BAA-IFR FAQ
1.How can I place an order for SI83404BAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404BAA-IFR 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 SI83404BAA-IFR reliable?
The price and inventory of SI83404BAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404BAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83404BAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404BAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404BAA-IFR?
SI83404BAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404BAA-IFR 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 SI83404BAA-IFR?
For technical support, including SI83404BAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404BAA-IFR requirements.
6.How does Aetrix verify that SI83404BAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83404BAA-IFR 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 SI83404BAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83404BAA-IFR?
All SI83404BAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83404BAA-IFR, 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 SI83404BAA-IFR part is unused and in its original packaging.
Return procedure for SI83404BAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404BAA-IFR Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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