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Skyworks Solutions Inc. SI83404BCA-IF
- Part No.:
- SI83404BCA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404BCA-IF.pdf
- Description:
- FOUR CHANNEL SOURCING OUTPUT WIT
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
SI83404BCA-IF from Skyworks Solutions is a quad-channel isolated smart switch with galvanic isolation, configured as four low-side switches delivering 700 mA continuous current per channel (RON = 155 mΩ) and supporting 9 V–32 V switch supply voltage. It integrates fault protection, diagnostics reporting via parallel interface, and open-drain channel status indicators for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83404BCA-IF datasheet, SI83404BCA-IF pinout, SI83404BCA-IF application, or SI83404BCA-IF equivalent, key selection considerations include its low-side configuration, absence of SPI interface, presence of open-channel warning indicator (OPEN_CH), and dedicated VDD2 undervoltage warning capability - all critical for safety-critical industrial I/O design.
Technical Context
The SI83404BCA-IF implements four independent low-side switches using RF-based CMOS isolation, each with integrated current, voltage, and temperature sensing. Its parallel-only control interface lacks SPI but exposes diagnostics through dedicated open-drain pins including OPEN_CH and VDD2_WRN.
It features a multi-voltage smart output clamp enabling unlimited demagnetization energy handling (EAS) and fast turn-OFF for inductive loads, while its fault response includes asynchronous shutdown on overcurrent, overtemperature, and undervoltage conditions without requiring host controller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Four low-side, open-drain switches - enables direct sinking of industrial loads like solenoids and relays to ground. |
| Continuous Current per Channel | 700 mA - supports standard PLC output drive requirements for resistive and inductive loads. |
| ON-State Resistance (RON) | 155 mΩ - minimizes power loss and thermal rise at rated load current. |
| Switch Supply Voltage Range | 9 V–32 V - compatible with common industrial DC bus voltages including 24 V nominal systems. |
| Logic Supply Voltage Range | 2.25 V–5.5 V - interoperable with low-voltage MCUs and industrial logic interfaces. |
| Isolation Rating | 1.5 kVRMS - certified for functional isolation in industrial control environments per IEC 61131-2. |
| Common-Mode Transient Immunity | >100 kV/µs - ensures robust operation in electrically noisy factory settings with fast-switching loads. |
Pinout & Package
SI83404BCA-IF is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad, optimized for high-density industrial PCB layouts and thermal management in enclosed control cabinets.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface side; accepts 2.25 V–5.5 V for MCU compatibility. |
| VDD2 | Switch supply input | Powers analog output side; 9 V–32 V range supports industrial DC power rails. |
| GND1 / GND2 | Logic / switch ground | Galvanically isolated grounds - mandatory separation to maintain 1.5 kVRMS isolation barrier integrity. |
| A1–A4 | Parallel input control | Direct logic-level enable inputs for each of four low-side switches. |
| B1–B4 | Switch output terminals | Low-side drain outputs - connect to load cathodes/anodes; sink current to GND2. |
| OE | Output enable | Asynchronous global disable - forces all channels OFF regardless of A1–A4 states. |
| OPEN_CH | Open-channel indicator | Active-low open-drain output asserting when any channel detects an open-load condition. |
| VDD2_WRN | VDD2 undervoltage warning | Active-low open-drain flag signaling VDD2 below UV threshold (VDD2UV9). |
| FLT | Fault indicator | Active-low open-drain output asserting when any monitored fault (overcurrent, overtemp, etc.) is detected. |
| DNC / NC | No-connect | Internally unused pins - must be left unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Low-side switch architecture | Enables direct integration into existing sink-type PLC output stages without level-shifting or external drivers. |
| Multi-voltage smart output clamp | Handles unlimited demagnetization energy (EAS) while maintaining fast turn-OFF for reduced arcing in relay/solenoid coils. |
| Open-channel detection | Real-time monitoring of load continuity per channel - critical for predictive maintenance in automated machinery. |
| VDD2 undervoltage warning | Dedicated VDD2_WRN pin provides immediate notification of marginal switch supply - prevents erratic switching behavior before full fault shutdown. |
| Asynchronous output disable | OE pin allows hardware-level emergency cutoff independent of logic state - meets SIL-2 functional safety requirements. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Control I/O |
|---|---|
Use Scenario: Driving 24 VDC solenoid valves and contactor coils in modular PLC backplanes with space-constrained DIN-rail enclosures. IC Role / Device Role / Timing Role: Low-side switch providing isolated, protected, and diagnosed load control - replaces discrete MOSFET + optocoupler + protection IC solutions. Use Value: Reduces BOM count by 60% versus discrete implementations while enabling real-time open-load detection to prevent machine downtime. | Use Scenario: Controlling stepper motor driver enable lines and brake release circuits in CNC machines and robotic arms. IC Role / Device Role / Timing Role: Galvanically isolated output stage delivering precise timing-controlled sink current with sub-10 µs propagation delay. Use Value: Ensures deterministic actuation timing and eliminates ground-loop interference between motion controller and high-power drives. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition System Output |
Use Scenario: Replacing electromechanical relays in HVAC control panels where silent operation, long life, and vibration immunity are required. IC Role / Device Role / Timing Role: Four-channel isolated low-side switch acting as solid-state relay bank with built-in EAS clamping and thermal derating. Use Value: Eliminates mechanical wear-out failure modes and supports 10× faster cycling than EM relays without contact welding. | Use Scenario: Providing configurable digital outputs in modular DAQ systems used for test benches and factory calibration stations. IC Role / Device Role / Timing Role: Isolated output interface translating MCU GPIO signals into robust 24 VDC-compatible drive capability with diagnostic visibility. Use Value: Enables remote fault identification (e.g., OPEN_CH assertion) without physical inspection - reducing mean time to repair (MTTR). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated low-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83404BBA-IF | Lacks OPEN_CH and VDD2_WRN indicators; only FLT pin available for fault reporting. | Suitable for cost-sensitive designs where open-load detection is not required. | Select SI83404BBA-IF only if diagnostics beyond basic fault indication are unnecessary. |
| SI83414BCA-IF | High-side sourcing configuration instead of low-side sinking; same pinout and package. | Required when load must be connected to VDD2 rail (e.g., common-anode LED arrays or PNP sensor interfaces). | Choose SI83414BCA-IF for high-side topology needs - not a drop-in replacement due to reversed current direction. |
Compared with SI83404BCA-IF, SI83404BBA-IF reduces diagnostic visibility by omitting OPEN_CH and VDD2_WRN, while SI83414BCA-IF changes fundamental circuit topology to high-side sourcing - making it functionally distinct despite identical packaging and channel count.
Availability
SI83404BCA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relay designs requiring stable component supply, long-term lifecycle support, and certified isolation performance.
Supply support for SI83404BCA-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 global 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 automation I/O modules, replacing optocoupler-based relay drivers with integrated, isolated, and self-diagnosing smart switches meeting IEC 61131-2 standards.
FAQ
What is the primary switching configuration of the SI83404BCA-IF?
The SI83404BCA-IF is configured exclusively as four low-side, open-drain switches. Each output (B1–B4) sinks current from the load to GND2, enabling direct interface with 24 VDC industrial loads such as solenoids and relays. This configuration is confirmed in Table 1 of the datasheet under "Output Driver Type" and verified in Figure 3 (Parallel Interface Device System Diagram). The SI83404BCA-IF does not support high-side sourcing.
Does the SI83404BCA-IF support SPI communication?
No, the SI83404BCA-IF does not support SPI communication. It belongs to the "Parallel" interface family (as indicated by the "A" suffix in the ordering guide), offering only parallel input control (A1–A4) and diagnostic indicator pins (OPEN_CH, VDD2_WRN, FLT). SPI capability is reserved for parts with "D" or "F" suffixes (e.g., SI83408BDA-IF). The SI83404BCA-IF relies entirely on hardware pins for configuration and status reporting.
What diagnostic indicators are available on the SI83404BCA-IF?
The SI83404BCA-IF provides three dedicated active-low, open-drain diagnostic indicators: FLT (global fault), OPEN_CH (asserts when any channel detects an open load), and VDD2_WRN (asserts when switch supply drops below VDD2UV9). These are explicitly listed in Table 1's "Channel Status Indicators" column for SI83404BCA-IF and confirmed in the truth table (Table 4) and pin descriptions. No LEDn status pins are present on this variant.
What is the maximum continuous current rating per channel for the SI83404BCA-IF?
The SI83404BCA-IF delivers 700 mA continuous current per channel, with a corresponding ON-state resistance (RON) of 155 mΩ. This rating is specified in Table 1 ("Continuous Output Current") and reinforced in Section 1 ("Description") and Key Features ("4 channels: 700 mA (155 mΩ)"). Derating applies above 85 °C ambient; full 700 mA is guaranteed from –40 °C to 85 °C with proper PCB thermal design.
Is the SI83404BCA-IF certified for industrial safety standards?
Yes, the SI83404BCA-IF carries pending safety certifications aligned with industrial requirements: UL 1577 recognition (1500 Vrms, 1 minute), CSA certification to 62368-1, and CQC approval to GB4943.1. It also complies with IEC 61131-2 for programmable controllers. These approvals are documented in the "Safety Approvals (Pending)" section of the datasheet and apply to the entire Si834x family, including SI83404BCA-IF.
SI83404BCA-IF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si834x
- 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:
- Bidirectional, 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)
SI83404BCA-IF FAQ
1.How can I place an order for SI83404BCA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404BCA-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 SI83404BCA-IF reliable?
The price and inventory of SI83404BCA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404BCA-IF is usually 5 days.
3.What payment methods are accepted for SI83404BCA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404BCA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404BCA-IF?
SI83404BCA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404BCA-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 SI83404BCA-IF?
For technical support, including SI83404BCA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404BCA-IF requirements.
6.How does Aetrix verify that SI83404BCA-IF is sourced from the original manufacturer or authorized distributors?
All SI83404BCA-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 SI83404BCA-IF meets industry standards.
7.What is the process for return or replacement of SI83404BCA-IF?
All SI83404BCA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83404BCA-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 SI83404BCA-IF part is unused and in its original packaging.
Return procedure for SI83404BCA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404BCA-IF 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.
-
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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