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Skyworks Solutions Inc. SI83401BBA-IFR
- Part No.:
- SI83401BBA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83401BBA-IFR.pdf
- Description:
- 1 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
SI83401BBA-IFR from Skyworks Solutions is a single-channel isolated high-side smart switch with 2.5 A continuous current capability, 41 mΩ RON, 1.5 kVRMS safety-rated isolation, and galvanic CMOS-based isolation barrier. It operates from 9–32 V switch supply and 2.25–5.5 V logic supply, delivering fast 10 µs update rate for industrial PLC output stages driving solenoids or lamps.
For engineers reviewing the SI83401BBA-IFR datasheet, SI83401BBA-IFR pinout, SI83401BBA-IFR application, or SI83401BBA-IFR equivalent, key selection considerations include its lack of channel status indicators (LEDn), absence of VDD2 warning pin (VDD2_WRN), no open-channel detection, and exclusive parallel interface-making it suitable for cost-optimized, SPI-free industrial I/O modules requiring robust fault reporting via FLT only.
Technical Context
The SI83401BBA-IFR implements a single high-side sourcing switch with dedicated isolation channels for control and diagnostics, using RF-modulated CMOS isolation instead of optocouplers. Its smart output clamp handles unlimited demagnetization energy (EAS) while enabling fast turn-OFF for inductive loads.
It supports Inrush Current Mode (8 A for 20 ms) and integrates overcurrent, overtemperature, undervoltage, and communication error protection. Diagnostics are reported solely via the active-low open-drain FLT pin-no LEDn or VDD2_WRN outputs-consistent with its "BBA" ordering variant per Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | High-side sourcing switch - directly drives loads between VDD2 and B1 terminal, eliminating need for external pull-up or ground-referenced switching. |
| Continuous Current | 2.5 A - enables direct drive of high-power solenoids, relays, or incandescent lamps without external current boosting. |
| RON | 41 mΩ - minimizes conduction loss (< 260 mW at 2.5 A), reducing thermal stress in compact industrial enclosures. |
| Isolation Rating | 1.5 kVRMS - certified to UL 1577 (pending), CSA 62368-1, and GB4943.1 for reinforced insulation in PLC backplanes. |
| Logic Interface | Parallel-only (A1 input + OE enable) - no SPI, simplifying migration from optocoupler-based designs and reducing MCU firmware overhead. |
| Diagnostic Reporting | Single FLT pin (active-low, open-drain) - aggregates all eight diagnostics (overcurrent, overtemp, open-circuit, etc.) into one hardware interrupt signal. |
| Operating Temp | −40 °C to +125 °C - qualified for extended temperature operation in uncooled control cabinets and motor drive environments. |
Pinout & Package
SI83401BBA-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 under sustained 2.5 A load conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Accepts 2.25–5.5 V; powers internal digital logic and isolation transmitter; internally diode-fed from A1 if unpowered. |
| OE | Asynchronous output enable | Active-high; overrides A1 input to force all outputs OFF regardless of channel state-critical for emergency shutdown. |
| A1 | Channel 1 parallel input | Direct logic-level control of B1 output; high = ON (sourcing), low = OFF; no debouncing or timing constraints required. |
| B1 | High-side switch output | Sources up to 2.5 A to load; connects to VDD2 via internal MOSFET; features integrated multi-voltage clamp for EAS handling. |
| VDD2 | Switch supply input | 9–32 V industrial rail; powers output stage and clamp circuitry; monitored for UVLO (VDD2UV9) and warning thresholds. |
| GND1 / GND2 | Logic & analog ground | Galvanically isolated grounds-GND1 for logic side, GND2 for power side-mandatory separation for safety compliance. |
| FLT | Fault indicator output | Active-low open-drain; asserts when any diagnostic fault (overcurrent, overtemp, open-load, comm error) is detected. |
| DNC / NC | No-connect terminals | Reserved pins (e.g., DNC, NC) must remain unconnected per datasheet; floating or tied to GND may compromise isolation integrity. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS-based galvanic isolation | Replaces optocouplers with >100 kV/µs CMTI, eliminating LED aging and enabling 1.5 kVRMS lifetime reliability in noisy factory environments. |
| Smart multi-voltage output clamp | Handles unlimited EAS during inductive turn-OFF, enabling fast demagnetization without external snubbers or TVS diodes. |
| Inrush Current Mode | Delivers 8 A peak for 20 ms to overcome cold filament resistance in lamps-prevents false overcurrent trips during startup. |
| Comprehensive fault protection | Monitors VDD1/VDD2 supply rails, die temperature, output current, and open-load condition-shuts down B1 before damage occurs. |
| IEC 61131-2 compliance | Meets industrial programmable controller standard for electrical noise immunity, voltage tolerance, and safe failure modes. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
|
Use Scenario: Replacing discrete optocoupler + MOSFET driver pairs in 24 V DC output cards for DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: High-side switch providing isolated 2.5 A drive with <10 µs update rate and integrated diagnostics for real-time fault logging. Use Value: Reduces component count by 40%, eliminates optocoupler drift calibration, and enables predictive maintenance via FLT pulse timing analysis. |
Use Scenario: Driving solenoid valves and indicator lamps in modular DAQ chassis where space and thermal density constrain design. IC Role / Device Role / Timing Role: Single-channel isolated driver with 41 mΩ RON and −40 °C to +125 °C operation for field-deployed sensor actuation nodes. Use Value: Maintains stable on-resistance across temperature, avoids derating at 70 °C ambient, and supports hot-swap I/O module insertion. |
| Motion Controller Axis Enable | Smart Solid-State Relay Replacement |
|
Use Scenario: Enabling/disabling stepper or servo motor power stages in CNC motion controllers where EMI immunity is critical. IC Role / Device Role / Timing Role: Isolated high-side switch with >100 kV/µs CMTI protecting MCU GPIOs from motor drive transients. Use Value: Prevents spurious axis faults caused by commutation noise, eliminating need for external ferrite beads or RC filters. |
Use Scenario: Upgrading electromechanical relays in HVAC control panels to solid-state equivalents with longer lifetime and silent operation. IC Role / Device Role / Timing Role: 2.5 A sourcing switch with unlimited EAS handling for inductive coil suppression without external clamps. Use Value: Achieves >108 cycles vs. 105 for mechanical relays, reduces acoustic noise, and enables zero-crossing compatible timing via OE control. |
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 |
|---|---|---|---|
| SI83401BAA-IFR | Includes LED1 channel status indicator and VDD2_WRN low-voltage warning pin; otherwise identical electrical specs. | Enables per-channel visual status feedback and early VDD2 brownout alert-useful in panel-mounted I/O where operator visibility matters. | Select SI83401BAA-IFR when local LED indication or proactive supply monitoring is required; SI83401BBA-IFR saves board space and BOM cost where only FLT suffices. |
| SI83405BDA-IFR | SPI interface instead of parallel; same 1-channel, 2.5 A, high-side sourcing architecture and isolation rating. | Supports daisy-chained diagnostics and individual channel configuration-ideal for centralized control architectures with limited GPIO resources. | Choose SI83405BDA-IFR when diagnostic granularity (e.g., per-fault type identification) or multi-device synchronization is needed; SI83401BBA-IFR suits simple on/off control with minimal MCU overhead. |
Compared with SI83401BAA-IFR, SI83401BBA-IFR removes LED1 and VDD2_WRN to reduce pin count and simplify layout, while retaining full fault protection and 2.5 A drive. Against SI83405BDA-IFR, it trades SPI configurability for deterministic parallel timing and zero firmware dependency-ideal for safety-critical hardwired logic paths.
Availability
SI83401BBA-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 certified isolation performance.
Supply support for SI83401BBA-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, isolation, and precision timing technologies.
The Si834x family was designed specifically for industrial automation I/O modules, replacing legacy optocoupler + discrete driver combinations with integrated, safety-certified, fault-aware smart switches.
FAQ
What is the maximum continuous output current supported by the SI83401BBA-IFR?
The SI83401BBA-IFR supports a maximum continuous output current of 2.5 A at 25 °C ambient, with RON of 41 mΩ. Derating applies above 85 °C case temperature per the thermal characteristics in Section 4.2 of the datasheet. This rating enables direct drive of industrial solenoids and lamps without external current amplification.
Does the SI83401BBA-IFR include SPI interface capability?
No, the SI83401BBA-IFR uses a parallel-only interface with A1 input and OE enable pin. It does not include SPI functionality-this distinguishes it from variants like SI83405BDA-IFR. All diagnostics are reported exclusively through the FLT pin, with no register access or configuration capability.
What isolation certifications apply to the SI83401BBA-IFR?
The SI83401BBA-IFR carries pending safety approvals including UL 1577 recognition (1500 VRMS/1 min), CSA certification to 62368-1, and CQC approval to GB4943.1. Its 1.5 kVRMS isolation rating and >100 kV/µs CMTI meet IEC 61131-2 requirements for industrial programmable controllers.
How does the SI83401BBA-IFR handle inductive load turn-OFF energy?
The SI83401BBA-IFR employs a proprietary multi-voltage smart output clamp that safely absorbs unlimited demagnetization energy (EAS) during inductive turn-OFF. This eliminates the need for external flyback diodes or TVS components while enabling fast, controlled turn-OFF to minimize contact arcing in relay-driven systems.
What fault conditions trigger the FLT pin on the SI83401BBA-IFR?
The FLT pin on the SI83401BBA-IFR asserts low for any detected fault including overcurrent, overtemperature, VDD1/VDD2 undervoltage, open-load (open-channel), and communication errors-even though SPI is absent, the internal diagnostic engine still monitors these conditions and reports them collectively via FLT.
SI83401BBA-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:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- 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)
SI83401BBA-IFR FAQ
1.How can I place an order for SI83401BBA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83401BBA-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 SI83401BBA-IFR reliable?
The price and inventory of SI83401BBA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83401BBA-IFR is usually 5 days.
3.What payment methods are accepted for SI83401BBA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83401BBA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83401BBA-IFR?
SI83401BBA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83401BBA-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 SI83401BBA-IFR?
For technical support, including SI83401BBA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83401BBA-IFR requirements.
6.How does Aetrix verify that SI83401BBA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83401BBA-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 SI83401BBA-IFR meets industry standards.
7.What is the process for return or replacement of SI83401BBA-IFR?
All SI83401BBA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83401BBA-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 SI83401BBA-IFR part is unused and in its original packaging.
Return procedure for SI83401BBA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83401BBA-IFR 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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