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Skyworks Solutions Inc. SI83404BCA-IFR
- Part No.:
- SI83404BCA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404BCA-IFR.pdf
- Description:
- FOUR CHANNEL SOURCING OUTPUT WIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,043
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Product details
Overview
SI83404BCA-IFR from Skyworks Solutions is a quad-channel isolated smart switch with galvanic isolation, configured as high-side switches delivering 700 mA continuous current per channel (RON = 155 mΩ), supporting 9–32 V switch supply and 2.25–5.5 V logic supply, and used in industrial PLC output modules for driving solenoids and relays.
For engineers reviewing the SI83404BCA-IFR datasheet, SI83404BCA-IFR pinout, SI83404BCA-IFR application, or SI83404BCA-IFR equivalent, key selection considerations include its open-source high-side topology, absence of SPI interface, presence of open-drain open-channel indicator (OPEN_CH), lack of VDD2 warning pin, and dedicated fault reporting via active-low FLT pin.
Technical Context
The SI83404BCA-IFR implements four independent high-side switches with CMOS-based RF isolation, each featuring integrated voltage, current, and temperature sensing plus multi-voltage clamp for unlimited EAS handling. It uses parallel input control with asynchronous OE pin and lacks SPI functionality.
Its truth table (Table 4 in datasheet) confirms operation under Si834xxxCx configuration: FLT_CLR input enables fault clearing, OPEN_CH pin reports open-circuit condition across all channels, and FLT asserts active-low on any detected fault including overcurrent, overtemperature, or undervoltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | High-side, open-source configuration with 155 mΩ RON per channel |
| Continuous Current | 700 mA per channel - supports industrial resistive/inductive loads without external heatsinking |
| Supply Range | VDD1: 2.25–5.5 V; VDD2: 9–32 V - compatible with 3.3 V/5 V MCUs and 24 V industrial rails |
| Isolation Rating | 1.5 kVRMS - UL 1577 recognized, enabling safe separation between logic and power domains |
| CMTI | >100 kV/µs - prevents false triggering in noisy industrial environments with fast transients |
| Operating Temp | −40 °C to +125 °C - qualified for extended industrial temperature range operation |
| Fault Reporting | Active-low FLT pin + OPEN_CH indicator - provides immediate hardware-level fault visibility without SPI |
Pinout & Package
SI83404BCA-IFR is housed in a compact 9×9 mm DFN-32 package with exposed thermal pad, optimized for high-density industrial PCB layouts and thermal dissipation.
| 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 |
| VDD2 | Switch supply input | Powers high-side outputs (9–32 V); UVLO threshold at ~9 V ensures safe startup |
| GND1 / GND2 | Logic / power ground | Galvanically isolated grounds - mandatory physical separation on PCB |
| OE | Asynchronous output enable | Active-high global enable; disables all outputs when low, independent of channel inputs |
| A1–A4 | Parallel logic inputs | Direct control of B1–B4 outputs; no SPI required - simplifies migration from optocouplers |
| B1–B4 | High-side switch outputs | Source current to load; each rated for 700 mA continuous, 155 mΩ RON |
| FLT | Fault indicator | Active-low open-drain output asserting on any fault (overcurrent, overtemp, undervoltage) |
| OPEN_CH | Open-circuit detector | Active-low open-drain pin indicating open-load condition on any channel |
| FLT_CLR | Fault clear input | Active-high input to reset latched faults after root cause removal |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | Replaces optocouplers with >100 kV/µs CMTI and 1.5 kVRMS rating for long-term reliability |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) while enabling fast turn-OFF for inductive loads |
| Open-channel detection | Hardware-level OPEN_CH pin reports open-circuit condition across all four channels instantly |
| Inrush current mode | Not implemented - SI83404BCA-IFR uses standard overload protection without 8 A/20 ms burst |
| Asynchronous fault clearing | FLT_CLR pin enables deterministic hardware reset of latched faults without MCU intervention |
| Industrial safety compliance | Pending UL 1577, CSA 62368-1, and CQC GB4943.1 certification for functional safety systems |
Applications
| PLC Digital Output Module | Industrial Motion Controller |
|---|---|
Use Scenario: Replacing mechanical relays and discrete driver+optocoupler combinations in modular I/O cards for programmable logic controllers. IC Role / Device Role / Timing Role: High-side switch providing isolated 24 V DC output drive with real-time fault feedback to controller. Use Value: Eliminates relay wear-out, reduces board space by 60% vs. discrete solutions, and delivers deterministic 10 µs update rate. |
Use Scenario: Driving stepper motor hold coils, brake solenoids, and limit switch indicators in CNC and packaging machinery. IC Role / Device Role / Timing Role: Isolated load switch with open-circuit detection ensuring fail-safe de-energization during cable disconnect. Use Value: Prevents uncommanded motion via OPEN_CH alert, avoids coil burnout via overtemperature shutdown, and sustains operation at 125 °C ambient. |
| Smart Solid-State Relay | Process Automation Terminal |
Use Scenario: Core switching element in DIN-rail mounted SSRs for HVAC damper actuators and pump controls. IC Role / Device Role / Timing Role: Four-channel high-side driver with integrated diagnostics replacing dual optocoupler + MOSFET designs. Use Value: Enables single-chip 4-channel SSR with FLT and OPEN_CH pins reducing external component count by 12 parts per channel. |
Use Scenario: Distributed I/O node in hazardous-area process monitoring systems requiring intrinsic safety and fault transparency. IC Role / Device Role / Timing Role: Isolated switch with hardware-level fault signaling (FLT, OPEN_CH) for SIL-2 capable subsystems. Use Value: Meets IEC 61131-2 requirements for industrial digital outputs and provides direct wiring to safety-rated PLC inputs. |
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 |
|---|---|---|---|
| SI83404BBA-IFR | Lacks OPEN_CH pin; includes VDD2_WRN indicator instead | Suitable where open-load detection is unnecessary but supply voltage warning is preferred | Select SI83404BBA-IFR only if system-level diagnostics prioritize VDD2 brownout over open-circuit monitoring |
| SI83404ABA-IFR | Includes Inrush Current Mode (8 A/20 ms) and VDD2_WRN pin; no OPEN_CH | Optimized for lamp loads requiring high inrush tolerance and supply monitoring | Choose SI83404ABA-IFR when driving incandescent lamps or other high-inrush resistive loads |
Compared with SI83404BCA-IFR, SI83404BBA-IFR trades open-channel detection for supply warning capability, while SI83404ABA-IFR adds inrush support at the expense of both OPEN_CH and FLT_CLR functionality - making SI83404BCA-IFR the only variant offering hardware-level open-circuit visibility with full fault clearing.
Availability
SI83404BCA-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-lifecycle assurance, and certified isolation performance.
Supply support for SI83404BCA-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 communications, industrial, and automotive markets.
The Si834x product line was designed specifically for industrial automation applications requiring robust galvanic isolation, integrated diagnostics, and high-reliability switching in harsh electromagnetic environments.
FAQ
What is the switch configuration of SI83404BCA-IFR?
The SI83404BCA-IFR is configured as four independent high-side switches in an open-source topology. Each channel sources current from VDD2 to the load, with 700 mA continuous rating and 155 mΩ typical RON. It does not support low-side sinking operation - this is fixed by the part number's "C" suffix in the Si834x ordering guide.
Does SI83404BCA-IFR support SPI communication?
No, SI83404BCA-IFR does not support SPI. It belongs to the Si834xxxCx family variant, which uses parallel input control (A1–A4) and hardware fault signaling (FLT, OPEN_CH, FLT_CLR) only. SPI functionality is present only in "D" and "F" suffix variants like SI83408BDA-IFR.
What diagnostic features are available on SI83404BCA-IFR?
SI83404BCA-IFR provides two hardware diagnostic outputs: active-low FLT pin indicating any fault (overcurrent, overtemperature, undervoltage), and active-low OPEN_CH pin asserting when an open-circuit condition is detected on any of the four output channels. It does not expose VDD2_WRN or LEDn status indicators.
What is the purpose of the FLT_CLR pin on SI83404BCA-IFR?
The FLT_CLR pin on SI83404BCA-IFR is an active-high input that clears latched fault conditions after the root cause has been resolved. When asserted high, it resets the internal fault latch so FLT returns low - enabling hardware-only fault recovery without requiring SPI register access or MCU firmware intervention.
Is SI83404BCA-IFR RoHS compliant and halogen-free?
Yes, SI83404BCA-IFR is RoHS compliant and halogen-free per Skyworks' material declarations. The device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified to AEC-Q100 stress test standards for industrial reliability, with full traceability through Skyworks' manufacturing lot codes.
SI83404BCA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si834x
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-IFR FAQ
1.How can I place an order for SI83404BCA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404BCA-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 SI83404BCA-IFR reliable?
The price and inventory of SI83404BCA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404BCA-IFR is usually 5 days.
3.What payment methods are accepted for SI83404BCA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404BCA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404BCA-IFR?
SI83404BCA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404BCA-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 SI83404BCA-IFR?
For technical support, including SI83404BCA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404BCA-IFR requirements.
6.How does Aetrix verify that SI83404BCA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83404BCA-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 SI83404BCA-IFR meets industry standards.
7.What is the process for return or replacement of SI83404BCA-IFR?
All SI83404BCA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83404BCA-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 SI83404BCA-IFR part is unused and in its original packaging.
Return procedure for SI83404BCA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404BCA-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.
-
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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