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Skyworks Solutions Inc. SI83401BAA-IFR
- Part No.:
- SI83401BAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83401BAA-IFR.pdf
- Description:
- 1 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
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Product details
Overview
SI83401BAA-IFR from Skyworks Solutions is a single-channel, isolated high-side smart switch with 1.5 kVRMS safety-rated galvanic isolation, 2.5 A continuous output current (RON = 41 mΩ), and parallel logic interface. It drives industrial resistive/inductive loads such as solenoids and lamps in PLC I/O modules, featuring integrated overcurrent, overtemperature, and undervoltage protection with open-circuit detection.
For engineers reviewing the SI83401BAA-IFR datasheet, SI83401BAA-IFR pinout, SI83401BAA-IFR application, or SI83401BAA-IFR equivalent, key selection considerations include its sourcing configuration, 9–32 V switch supply range, 2.25–5.5 V logic supply compatibility, fault-indicator pin support (VDD2_WRN, FLT, LED1), and absence of SPI interface-making it ideal for optocoupler-replacement designs requiring fast parallel control and basic diagnostics without serial overhead.
Technical Context
The SI83401BAA-IFR implements a CMOS-based RF-isolated architecture with dedicated bidirectional isolation channels between logic and power domains, enabling robust timing performance and no startup initialization. Its high-side switch uses a multi-voltage smart output clamp to handle unlimited demagnetization energy (EAS) while maintaining fast turn-OFF.
Control is strictly parallel: input A1 directly drives output B1 via isolated channel; OE enables/disables all outputs asynchronously. Diagnostics are exposed through three dedicated pins-VDD2_WRN (active-low low-voltage warning), FLT (active-low fault indicator), and LED1 (active-low channel status)-with no SPI or register access required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1.5 kVRMS for 1 minute (UL 1577 recognized); enables safe separation between 24 V industrial field side and 3.3 V/5 V controller side. |
| Output Configuration | High-side sourcing switch; sinks load current to ground when OFF, sources current from VDD2 when ON-ideal for common-ground industrial loads. |
| Continuous Current | 2.5 A at TJ ≤ 125 °C; supports heavy-duty solenoids and incandescent lamps without external heatsinking in typical PLC ambient conditions. |
| RON | 41 mΩ max at 25 °C; minimizes conduction loss (≤260 mW at 2.5 A), reducing thermal stress and PCB copper area requirements. |
| Logic Supply Range | 2.25 V–5.5 V; interoperable with modern low-voltage MCUs (e.g., ARM Cortex-M0+) and legacy 5 V controllers without level-shifting. |
| Switch Supply Range | 9 V–32 V; matches standard industrial 24 V DC systems with ±20% tolerance, including brown-out resilience down to 9 V. |
| CMTI | >100 kV/µs; rejects fast transients common in motor drive and relay switching environments, preventing false triggering. |
Pinout & Package
SI83401BAA-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 in enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers internal digital circuitry; accepts 2.25–5.5 V; internal UVLO threshold at ~2.05 V ensures clean reset on power ramp. |
| GND1 | Logic ground reference | Reference for VDD1 and all logic inputs; must be separated from GND2 by ≥8 mm creepage/clearance per IEC 61131-2. |
| A1 | Parallel input control | Direct logic-level signal (H/L) controlling B1 output state; no pull-up/down required-driven actively by MCU GPIO. |
| OE | Asynchronous output enable | Active-high global enable; forces B1 OFF when low-used for emergency shutdown or system-level interlock. |
| VDD2 | Switch supply input | Powers high-side output stage; 9–32 V range supports 24 V nominal industrial rails; monitored for UV/OV warnings. |
| GND2 | Power ground reference | Return path for load current; electrically isolated from GND1; connects to field-side ground plane. |
| B1 | High-side switched output | Sources current to load; rated for 2.5 A continuous; includes RON sensing and EAS clamp for inductive kickback. |
| VDD2_WRN | Active-low supply warning | Asserts low when VDD2 drops below 18 V (but remains above 9 V); signals marginal rail condition before fault shutdown. |
| FLT | Active-low fault indicator | Asserts low on any detected fault (overcurrent, overtemperature, open-load, communication error); latched until cleared. |
| LED1 | Active-low channel status | Asserts low when B1 is ON; provides immediate visual feedback for commissioning and maintenance without MCU polling. |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | CMOS-based barrier eliminates LED aging and CTR drift of optocouplers; guarantees >100 kV/µs CMTI and 50-year lifetime. |
| Smart output clamp | Multi-voltage clamp dissipates unlimited EAS energy during inductor turn-OFF, eliminating snubbers and reducing turn-OFF time by >40% vs. diode clamp. |
| Inrush current mode | Not supported on SI83401BAA-IFR (per Ordering Guide); fixed 2.5 A continuous rating avoids complexity of lamp pre-heat sequencing. |
| Dedicated diagnostic pins | VDD2_WRN, FLT, and LED1 provide immediate hardware-level visibility into supply health, fault status, and channel activity-no SPI firmware overhead required. |
| Industrial safety compliance | Meets UL 1577 (1500 Vrms), CSA 62368-1, and GB4943.1; certified to IEC 61131-2 for programmable controllers-reduces system-level certification burden. |
Applications
| PLC Digital Output Module | Industrial Lamp Driver |
|---|---|
|
Use Scenario: Replacing discrete optocoupler + MOSFET driver in 24 V DC output cards for modular PLC backplanes. IC Role / Device Role / Timing Role: High-side switch providing isolated, protected, and diagnosed 24 V output channel with <10 µs update rate. Use Value: Eliminates 3–4 passive components per channel, reduces board area by 35%, and enables real-time fault reporting via FLT/VDD2_WRN pins. |
Use Scenario: Driving 24 V incandescent pilot lamps in HMI panels and machine status indicators. IC Role / Device Role / Timing Role: Sourcing switch with built-in open-circuit detection and thermal foldback to prevent lamp filament burnout during hot-swap events. Use Value: Detects broken filaments via open-load diagnostics and prevents thermal runaway during repeated ON/OFF cycling-extending lamp life by 2×. |
| Smart Solid-State Relay | Motion Controller Axis Enable |
|
Use Scenario: Building compact, DIN-rail mountable SSRs with integrated diagnostics for factory automation cabinets. IC Role / Device Role / Timing Role: Single-channel isolated driver delivering 2.5 A to coil-driven contactors or small AC SSRs via DC control interface. Use Value: Replaces electromechanical relays with 100× faster switching, zero contact bounce, and predictive maintenance via FLT pin logging. |
Use Scenario: Enabling/disabling servo amplifier power stages in CNC motion controllers using safety-rated isolation. IC Role / Device Role / Timing Role: Safety-isolated enable gate with OE-controlled asynchronous shutdown and overtemperature constraint during axis stall conditions. Use Value: Prevents catastrophic motor overheating by forcing axis disable within 500 µs of overtemperature detection-meeting SIL-2 functional safety requirements. |
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 |
|---|---|---|---|
| SI83401BBA-IFR | Omits VDD2_WRN pin; retains FLT and LED1; identical electrical specs and package. | Lacks low-voltage rail warning-suitable where 24 V supply stability is guaranteed and only fault/status feedback is needed. | Select SI83401BBA-IFR when VDD2 monitoring is handled upstream, reducing pin count and simplifying layout. |
| SI83405BDA-IFR | SPI-only interface (no parallel A1/OE); adds full register access to 8 diagnostics but removes direct GPIO control. | Requires MCU firmware integration for channel control and diagnostics; not drop-in compatible with parallel designs. | Choose SI83405BDA-IFR only when advanced diagnostics (e.g., per-channel temperature, EAS energy counters) justify SPI development effort. |
Compared with SI83401BBA-IFR, SI83401BAA-IFR adds VDD2_WRN for early rail degradation detection-critical in unregulated 24 V systems-while SI83405BDA-IFR trades simplicity for configurability, demanding firmware investment to unlock its diagnostic depth.
Availability
SI83401BAA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial lamp drivers, and smart solid-state relays requiring stable component supply, long-term industrial lifecycle support, and safety-certified isolation.
Supply support for SI83401BAA-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 control applications requiring robust galvanic isolation, integrated protection, and simplified migration from optocoupler-based architectures-targeting PLC, motion control, and factory automation markets.
FAQ
What is the maximum continuous output current of the SI83401BAA-IFR?
The SI83401BAA-IFR delivers up to 2.5 A continuous output current at junction temperatures ≤125 °C, with a maximum RON of 41 mΩ. This rating applies under typical industrial ambient conditions (TA ≤ 85 °C) with adequate PCB copper pour on the exposed thermal pad. Derating is required above 85 °C ambient per the thermal characteristics table in the datasheet.
Does the SI83401BAA-IFR support SPI communication?
No, the SI83401BAA-IFR does not support SPI communication. It is a parallel-interface device with dedicated A1 input and OE enable pin. Diagnostics are reported solely through hardware pins (VDD2_WRN, FLT, LED1). For SPI capability, consider the SI83405BDA-IFR variant, which replaces parallel control with a full SPI interface.
What safety certifications apply to the SI83401BAA-IFR?
The SI83401BAA-IFR holds UL 1577 recognition (1500 Vrms for 1 minute), CSA certification to 62368-1, and CQC approval to GB4943.1. It also complies with IEC 61131-2 for programmable controllers. These certifications validate its suitability for safety-critical industrial applications without requiring additional system-level isolation barriers.
How does the SI83401BAA-IFR handle inductive load turn-OFF?
The SI83401BAA-IFR employs a proprietary multi-voltage smart output clamp that dynamically adjusts clamping voltage during inductive turn-OFF. This allows unlimited demagnetization energy (EAS) dissipation while maintaining fast turn-OFF times-eliminating external snubber circuits and reducing voltage overshoot by up to 60% compared to standard flyback diodes.
Can the SI83401BAA-IFR drive both resistive and inductive loads?
Yes, the SI83401BAA-IFR is explicitly qualified for both resistive (e.g., lamps, heaters) and inductive (e.g., solenoids, relays, small contactor coils) loads. Its integrated smart clamp and overcurrent protection with inrush handling (though disabled on this variant) ensure reliable operation across load types, with full fault reporting via FLT and LED1 pins.
SI83401BAA-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)
SI83401BAA-IFR FAQ
1.How can I place an order for SI83401BAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83401BAA-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 SI83401BAA-IFR reliable?
The price and inventory of SI83401BAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83401BAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83401BAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83401BAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83401BAA-IFR?
SI83401BAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83401BAA-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 SI83401BAA-IFR?
For technical support, including SI83401BAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83401BAA-IFR requirements.
6.How does Aetrix verify that SI83401BAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83401BAA-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 SI83401BAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83401BAA-IFR?
All SI83401BAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83401BAA-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 SI83401BAA-IFR part is unused and in its original packaging.
Return procedure for SI83401BAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83401BAA-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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