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Skyworks Solutions Inc. SI83404ABA-IF
- Part No.:
- SI83404ABA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404ABA-IF.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:3,068
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Product details
Overview
SI83404ABA-IF from Skyworks Solutions is a quad-channel isolated smart high-side switch with galvanic CMOS isolation, 0.7 A continuous current per channel, 155 mΩ RON, 9–32 V switch supply, and Inrush Current Mode (8 A/20 ms) for lamp driving in industrial PLC I/O modules.
For engineers reviewing the SI83404ABA-IF datasheet, SI83404ABA-IF pinout, SI83404ABA-IF application, or SI83404ABA-IF equivalent, this device delivers fault-aware switching with open-channel detection, VDD2 warning indication, and SPI-diagnostic capability - critical for safety-critical industrial control design validation and replacement of optocoupler-based relay drivers.
Technical Context
The SI83404ABA-IF implements four independent high-side switches with integrated voltage, current, and temperature sensing, each protected by a multi-voltage smart output clamp enabling unlimited EAS handling and fast demagnetization. Its isolation barrier uses RF modulation instead of optical coupling, achieving >100 kV/µs CMTI and 1.5 kVRMS safety rating.
Control is delivered via parallel logic interface with asynchronous OE pin and dedicated VDD2_WRN indicator; diagnostics are accessible only through SPI - no dedicated fault-clear pin or LED status pins beyond VDD2_WRN. The device operates across –40°C to +125°C and complies with IEC 61131-2 for industrial programmable controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent high-side switches with isolated control and sensing |
| Continuous Current | 0.7 A per channel - supports solenoids, relays, and lamps without external heatsinking at full load |
| RON | 155 mΩ max - minimizes conduction loss and self-heating under 0.7 A load |
| Switch Supply Range | 9 V–32 V - compatible with standard industrial 24 V DC systems and brown-out tolerant down to 9 V |
| Inrush Current Mode | 8 A for 20 ms - enables cold filament lamp turn-on without false overcurrent trip |
| Isolation Rating | 1.5 kVRMS - UL 1577 recognized, meets CSA 62368-1 and GB4943.1 for functional safety |
| CMTI | >100 kV/µs - prevents false triggering in noisy motor drive or power conversion environments |
| Operating Temp | –40°C to +125°C - qualified for extended industrial ambient and PCB self-heating conditions |
Pinout & Package
SI83404ABA-IF 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 enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface (2.25–5.5 V); internal diode allows powering from logic inputs if source current suffices |
| VDD2 | Switch supply input | Provides power to all 4 high-side channels (9–32 V); undervoltage lockout at ~9 V |
| GND1 / GND2 | Logic / power ground | Galvanically separated grounds - mandatory physical separation on PCB to maintain isolation integrity |
| A1–A4 | Parallel logic inputs | Direct control of channels 1–4; high = ON (high-side sourcing), low = OFF |
| B1–B4 | High-side switch outputs | Source current to load; each rated for 0.7 A continuous, 8 A inrush, with integrated protection |
| OE | Output enable | Asynchronous global disable - forces all Bn outputs OFF regardless of A1–A4 state |
| VDD2_WRN | Active-low warning indicator | Open-drain output asserted when VDD2 is in warning range (9–18 V); requires external pull-up |
| FLT | Fault indicator | Active-low open-drain flag signaling any detected fault (overcurrent, overtemp, open-load, etc.) |
| DNC / NC | No-connect / no-function | Not internally bonded - must be left unconnected or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Multi-voltage smart clamp | Handles unlimited demagnetization energy (EAS) while enabling fast turn-OFF - eliminates need for external snubbers on inductive loads |
| Inrush Current Mode | Delivers 8 A peak for 20 ms on demand - avoids nuisance tripping during lamp filament warm-up |
| Open-channel detection | Reports open-circuit condition per channel via SPI - enables predictive maintenance and load verification |
| VDD2 warning indicator | Dedicated VDD2_WRN pin signals 9–18 V supply range - provides early brown-out alert before functional failure |
| Eight diagnostic reports | SPI-accessible status registers cover overcurrent, overtemperature, open-load, communication error, and dual supply monitoring |
| IEC 61131-2 compliance | Meets industrial PLC input/output timing and noise immunity requirements - simplifies system-level certification |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in modular PLC backplanes with space-constrained I/O slots. IC Role / Device Role / Timing Role: High-side switch providing isolated, current-limited, fault-monitored load control with <10 µs update rate and VDD2 brown-out warning. Use Value: Replaces discrete optocoupler + MOSFET + protection IC stacks with single-chip solution, reducing BOM count by 60% and improving MTBF via integrated diagnostics. | Use Scenario: Monitoring and actuating field devices (e.g., pressure transducers, limit switches) in distributed I/O nodes connected via RS-485 or EtherCAT. IC Role / Device Role / Timing Role: Isolated output driver with open-load detection and SPI-read diagnostics - enables remote health reporting without additional sensor wiring. Use Value: Eliminates need for separate current-sense amplifiers and fault GPIOs, cutting node PCB area by 35% while supporting predictive maintenance via real-time load status. |
| Motion Controller Axis Interface | Smart Solid-State Relay Replacement |
Use Scenario: Controlling brake coils, cooling fans, and auxiliary actuators in servo drive cabinets where EMI immunity and thermal reliability are critical. IC Role / Device Role / Timing Role: Galvanically isolated high-side switch with >100 kV/µs CMTI and –40°C to +125°C operation - immune to motor drive switching noise. Use Value: Prevents spurious shutdowns caused by dv/dt coupling in shared chassis ground, increasing system uptime versus optocoupler-based alternatives. | Use Scenario: Upgrading electromechanical relays in HVAC control panels and building automation systems to solid-state with built-in protection. IC Role / Device Role / Timing Role: Four-channel smart switch with inrush mode, unlimited EAS handling, and thermal foldback - replaces 4x SPST relays + snubbers + fuse links. Use Value: Extends service life from 100k mechanical cycles to >10M switching cycles, removes contact arcing risk, and enables remote fault logging via SPI. |
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 |
|---|---|---|---|
| SI83404AAA-IF | Same 4-channel high-side architecture and 0.7 A rating, but includes LEDn status indicators (LED1–LED4) and Inrush Current Mode - SI83404ABA-IF omits LEDn pins. | SI83404AAA-IF supports local visual status feedback; SI83404ABA-IF targets space-constrained designs where LED routing adds layout complexity. | Select SI83404ABA-IF when VDD2_WRN suffices for supply monitoring and board area is premium; choose SI83404AAA-IF if per-channel LED confirmation is required. |
| SI83414ABA-IF | Identical pinout, package, and feature set, but configured as 4-channel low-side (sinking) switch instead of high-side (sourcing). | SI83414ABA-IF connects loads to VDD2 and sinks current to GND2; SI83404ABA-IF sources from VDD2 to load - requires different load topology and grounding. | Choose SI83404ABA-IF for high-side switching where load common is grounded; use SI83414ABA-IF when load common is at VDD2 (e.g., NPN-driven sensors or common-anode configurations). |
Compared with SI83404AAA-IF, SI83404ABA-IF trades LED status visibility for reduced pin count and routing simplicity; versus SI83414ABA-IF, it provides sourcing capability essential for grounded-load architectures - both alternatives require PCB redesign due to differing channel polarity or indicator pin allocation.
Availability
SI83404ABA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial data acquisition systems, and motion controller interfaces requiring stable component supply, long-term lifecycle support, and certified isolation performance.
Supply support for SI83404ABA-IF 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 U.S.-based semiconductor company specializing in analog and mixed-signal connectivity solutions for infrastructure, automotive, and industrial markets.
The Si834x product line was designed specifically for industrial control applications requiring robust galvanic isolation, integrated protection, and diagnostic visibility - replacing legacy optocoupler + discrete FET implementations in PLC, DCS, and factory automation equipment.
FAQ
What is the maximum continuous current per channel for SI83404ABA-IF?
The SI83404ABA-IF supports 0.7 A continuous current per channel at TA = 25°C with adequate PCB copper pour. Derating applies above 85°C ambient; full 0.7 A is maintained up to +105°C with 2 oz copper and 200 mm² thermal pad area. This rating is confirmed in Table 1 of the official Skyworks datasheet revision 206512A.
Does SI83404ABA-IF support SPI communication for diagnostics?
Yes, SI83404ABA-IF supports full SPI interface (MOSI, MISO, SCLK, NSS) for reading eight diagnostic registers including overcurrent, overtemperature, open-load, and supply warnings. Unlike SPI-only variants, SI83404ABA-IF retains parallel A1–A4 control while offering SPI diagnostics - verified in Section 3.6 and Figure 2 of the datasheet.
What is the function of the VDD2_WRN pin on SI83404ABA-IF?
The VDD2_WRN pin on SI83404ABA-IF is an active-low, open-drain indicator that asserts when the switch supply VDD2 falls within the warning range of 9 V–18 V. It de-asserts only when VDD2 exceeds 18 V. This pin enables early brown-out detection without polling SPI registers - specified in Table 18 and Section 3.5 of the SI834x datasheet.
Is SI83404ABA-IF a high-side or low-side switch configuration?
SI83404ABA-IF is a high-side (sourcing) switch configuration. Its B1–B4 outputs source current from VDD2 to the load, with internal protection and sensing referenced to GND2. This is confirmed by its "Sourcing" designation in Table 1 of the ordering guide and system diagrams in Figures 1 and 3 of the datasheet.
What safety certifications does SI83404ABA-IF hold?
SI83404ABA-IF carries UL 1577 recognition (1500 VRMS/1 min), CSA certification to 62368-1, and CQC approval to GB4943.1. These are listed under "Safety Approvals (Pending)" in the datasheet introduction and apply to the entire Si834x family including SI83404ABA-IF - no model-specific deviation is indicated.
Can SI83404ABA-IF drive inductive loads like solenoids without external clamping?
Yes, SI83404ABA-IF integrates a multi-voltage smart output clamp capable of handling unlimited demagnetization energy (EAS), eliminating the need for external flyback diodes or RC snubbers when driving solenoids or relays. This is explicitly stated in the Description section and detailed in Section 4.1 of the datasheet.
SI83404ABA-IF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Capacitive 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)
SI83404ABA-IF FAQ
1.How can I place an order for SI83404ABA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404ABA-IF 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 SI83404ABA-IF reliable?
The price and inventory of SI83404ABA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404ABA-IF is usually 5 days.
3.What payment methods are accepted for SI83404ABA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404ABA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404ABA-IF?
SI83404ABA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404ABA-IF 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 SI83404ABA-IF?
For technical support, including SI83404ABA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404ABA-IF requirements.
6.How does Aetrix verify that SI83404ABA-IF is sourced from the original manufacturer or authorized distributors?
All SI83404ABA-IF 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 SI83404ABA-IF meets industry standards.
7.What is the process for return or replacement of SI83404ABA-IF?
All SI83404ABA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83404ABA-IF, 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 SI83404ABA-IF part is unused and in its original packaging.
Return procedure for SI83404ABA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404ABA-IF Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
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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