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Skyworks Solutions Inc. SI83404AAA-IFR
- Part No.:
- SI83404AAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404AAA-IFR.pdf
- Description:
- DGTL ISOL 1500VRMS 4CH SPI 32DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,679
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Product details
Overview
SI83404AAA-IFR from Skyworks Solutions is a quad-channel isolated smart high-side switch IC designed for industrial load control in PLCs and motion controllers. It delivers 0.7 A continuous per channel, features 1.5 kVRMS galvanic isolation, supports 9–32 V switch supply and 2.25–5.5 V logic supply, and integrates Inrush Current Mode (8 A/20 ms) for lamp driving.
For engineers reviewing the SI83404AAA-IFR datasheet, SI83404AAA-IFR pinout, SI83404AAA-IFR application, or SI83404AAA-IFR equivalent, key selection considerations include its parallel-input + SPI-diagnostic interface, four-channel high-side sourcing configuration, 10 µs update rate, multi-voltage output clamp for unlimited EAS handling, and eight integrated diagnostics accessible via SPI or open-drain indicator pins.
Technical Context
The SI83404AAA-IFR implements four independent high-side switches using RF-based CMOS isolation with >100 kV/µs CMTI, each controlled via dedicated parallel inputs and an asynchronous OE pin. Its isolation barrier separates logic (VDD1/GND1) and power (VDD2/GND2) domains, enabling safe operation across 1.5 kVRMS safety-rated boundaries.
Switch operation includes real-time monitoring of voltage, current, and temperature per channel, with fault responses including current limiting, thermal shutdown, and undervoltage lockout. Diagnostics-including overcurrent, overtemperature, open-circuit, and communication errors-are reported via SPI status registers or active-low open-drain LEDn pins, with independent isolation channels ensuring diagnostic integrity separate from control signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 4 independent high-side sourcing switches |
| Continuous Output Current | 0.7 A per channel at 155 mΩ RON |
| Inrush Current Mode | 8 A for 20 ms to safely drive cold-filament lamps |
| Isolation Rating | 1.5 kVRMS for 1 minute (UL 1577 pending) |
| Logic Supply Range | 2.25 V–5.5 V - compatible with low-power MCUs |
| Switch Supply Range | 9 V–32 V - matches industrial DC bus voltages |
| Update Rate | 10 µs - enables fast response in closed-loop control |
| CMTI | >100 kV/µs - ensures robust noise immunity in noisy factory environments |
Pinout & Package
SI83404AAA-IFR uses a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation under sustained 0.7 A loads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic domain supply | Provides power to digital interface and isolation transmitter; 2.25–5.5 V range |
| GND1 | Logic domain ground | Reference for input signals and SPI interface; galvanically isolated from GND2 |
| VDD2 | Power domain supply | Bias for all four high-side switches; 9–32 V operation with UVLO protection |
| GND2 | Power domain ground | Return path for switched loads; isolated from GND1 to maintain barrier integrity |
| A1–A4 | Parallel input controls | Direct logic-level enable inputs for channels 1–4; high = ON (high-side sourcing) |
| OE | Output enable | Asynchronous global disable - forces all outputs OFF regardless of A1–A4 state |
| B1–B4 | High-side switch outputs | Source terminals delivering up to 0.7 A to external loads; integrated clamp handles EAS |
| LED1–LED4 | Channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1–B4 |
| FLT | Fault indicator | Active-low open-drain signal asserting when any diagnostic fault (e.g., overtemp, OC) is detected |
| DNC / NC | No-connect / no-connect | Unbonded pins; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| RF-based CMOS isolation | Eliminates LED aging and CTR drift of optocouplers; enables >100 kV/µs CMTI and 1.5 kVRMS rating |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-off while maintaining fast switching |
| Inrush Current Mode | Delivers 8 A peak for 20 ms to overcome cold-filament resistance without tripping overcurrent protection |
| SPI + parallel dual-interface | Enables simple optocoupler drop-in replacement (parallel) while retaining full diagnostics via SPI (8 reports) |
| Per-channel protection suite | Integrates overcurrent, overtemperature, open-load detection, and supply UVLO - all with automatic recovery or latch-off behavior |
| Compact DFN-32 package | 9×9 mm footprint with exposed thermal pad supports high-density PLC I/O modules and thermal management at 0.7 A/channel |
Applications
| Programmable Logic Controllers (PLCs) | Industrial Motion Controllers |
|---|---|
Use Scenario: Controlling solenoid valves, relay coils, and indicator lamps in modular I/O racks of DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: High-side switch providing galvanically isolated 0.7 A drive per channel with 10 µs update rate for deterministic scan-cycle timing. Use Value: Replaces discrete optocoupler + MOSFET combinations with single-chip solution, reducing BOM count and improving long-term reliability in harsh EMI environments. | Use Scenario: Driving brake coils, hold solenoids, and position feedback indicators in servo and stepper motor control cabinets. IC Role / Device Role / Timing Role: Isolated high-side driver managing inductive loads with integrated EAS clamp and inrush mode for consistent actuation timing. Use Value: Eliminates external flyback diodes and current-limiting resistors while enabling real-time open-circuit detection to prevent undetected coil failures. |
| Smart Solid-State Relays | Industrial Data Acquisition Systems |
Use Scenario: Building compact, thermally efficient solid-state relays for panel-mount or PCB-integrated switching in HVAC and factory automation. IC Role / Device Role / Timing Role: Quad-channel high-side switch delivering 0.7 A per pole with built-in diagnostics for predictive maintenance reporting. Use Value: Enables self-monitoring relay modules that report overtemperature or open-load faults via SPI before catastrophic failure occurs. | Use Scenario: Conditioning and isolating digital output signals from DAQ mainframes to field actuators in test benches and process monitoring systems. IC Role / Device Role / Timing Role: Galvanically isolated interface translating MCU GPIO states into robust 9–32 V load drives with fault-aware status feedback. Use Value: Provides system-level fault visibility (e.g., VDD2 warning, communication error) without requiring additional supervisory ICs or firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated high-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83404BAA-IFR | Lacks Inrush Current Mode; no LEDn status indicators | Suitable only for non-lamp resistive/inductive loads without cold-start surge requirements | Select SI83404BAA-IFR when lamp driving is unnecessary and board space allows omission of status LEDs |
| SI83408AFA-IFR | Supports both parallel and SPI interfaces; includes VDD2_WRN pin but no LEDn indicators | Offers flexible control architecture but omits per-channel visual status feedback | Choose SI83408AFA-IFR when dual-interface flexibility is prioritized over discrete channel status indication |
Compared with SI83404BAA-IFR and SI83408AFA-IFR, the SI83404AAA-IFR uniquely combines Inrush Current Mode *and* four dedicated LEDn status outputs - making it the only variant in the Si834x family qualified for lamp-driving applications requiring both surge capability and immediate visual channel feedback.
Availability
SI83404AAA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relays requiring stable component supply, long-term lifecycle support, and compliance with IEC 61131-2.
Supply support for SI83404AAA-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 for infrastructure, automotive, and industrial markets.
The Si834x product line was engineered specifically for industrial I/O consolidation - delivering isolated high-side switching with embedded diagnostics, robust EAS handling, and compatibility with legacy optocoupler-based designs.
FAQ
What is the maximum continuous current per channel for SI83404AAA-IFR?
The SI83404AAA-IFR delivers 0.7 A continuous current per channel at 25 °C ambient, with RON specified at 155 mΩ. Derating applies above 85 °C ambient per the thermal characteristics in the datasheet. This rating assumes proper PCB copper area and thermal vias under the exposed pad to maintain junction temperature within limits.
Does SI83404AAA-IFR support both high-side and low-side switching configurations?
No - SI83404AAA-IFR is configured exclusively as a high-side sourcing switch. The Si834x family includes separate part numbers for low-side sinking variants (e.g., SI83414AAA-IFR), but SI83404AAA-IFR's internal architecture and pinout (B1–B4 as source outputs) are fixed for high-side operation only.
How does the Inrush Current Mode in SI83404AAA-IFR work, and when is it activated?
The Inrush Current Mode in SI83404AAA-IFR delivers 8 A for up to 20 ms upon channel turn-on to handle cold-filament lamp surges. It activates automatically when the output transitions from OFF to ON under valid supply conditions and deactivates after the 20 ms window or if overcurrent protection triggers earlier.
Can SI83404AAA-IFR be used without connecting the SPI interface?
Yes - SI83404AAA-IFR operates fully in parallel-input mode using A1–A4 and OE pins alone. The SPI interface is optional and used only for advanced diagnostics, configuration, and fault clearing; its absence does not affect basic switching functionality or LEDn status reporting.
What safety certifications apply to SI83404AAA-IFR?
SI83404AAA-IFR carries pending UL 1577 recognition (1500 Vrms, 1 minute), CSA certification to 62368-1, and CQC approval to GB4943.1. These reflect its 1.5 kVRMS isolation rating and compliance with industrial safety standards - critical for use in mains-connected PLC I/O modules.
SI83404AAA-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:
- Capacitive Coupling
- Type:
- SPI
- Isolated Power:
- No
- 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):
- 2.3µs, 2.9µs (Typ)
- Pulse Width Distortion (Max):
- 10µs (Min)
- Rise / Fall Time (Typ):
- 3µs, 3µs
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-DFN (9x9)
SI83404AAA-IFR FAQ
1.How can I place an order for SI83404AAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404AAA-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 SI83404AAA-IFR reliable?
The price and inventory of SI83404AAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404AAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83404AAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404AAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404AAA-IFR?
SI83404AAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404AAA-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 SI83404AAA-IFR?
For technical support, including SI83404AAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404AAA-IFR requirements.
6.How does Aetrix verify that SI83404AAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83404AAA-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 SI83404AAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83404AAA-IFR?
All SI83404AAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83404AAA-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 SI83404AAA-IFR part is unused and in its original packaging.
Return procedure for SI83404AAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404AAA-IFR 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
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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