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Skyworks Solutions Inc. SI83412BAA-IFR
- Part No.:
- SI83412BAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83412BAA-IFR.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SIN
- Quantity:
- Payment:
- Shipping:
Inventory:3,249
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Product details
Overview
SI83412BAA-IFR from Skyworks Solutions is a 2-channel isolated low-side smart switch IC with galvanic CMOS isolation, 1.25 A continuous output current per channel, 78 mΩ RON, and 9 V–32 V switch supply range. It integrates overcurrent, overtemperature, undervoltage, and open-circuit diagnostics, and is designed for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83412BAA-IFR datasheet, SI83412BAA-IFR pinout, SI83412BAA-IFR application, or SI83412BAA-IFR equivalent, this page delivers verified specifications, validated pin functions, confirmed diagnostic reporting via parallel interface, and real-world substitution guidance for industrial control system design.
Technical Context
The SI83412BAA-IFR implements two independent low-side switching channels using RF-modulated CMOS isolation, each with dedicated voltage/current/temperature sensing and a multi-voltage smart clamp for unlimited EAS handling. Its parallel-only interface uses dedicated OE and channel input pins without SPI, simplifying migration from optocoupler-based designs.
Each channel supports inrush current mode (8 A for 20 ms), fast 10 µs update rate, and fault-safe shutdown on VDD1/VDD2 undervoltage. Diagnostics-including open-circuit warning and supply voltage status-are reported via active-low open-drain LEDn pins and FLT, with no dependency on switch control timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 2 independent low-side switches, each rated for 1.25 A continuous load current at 78 mΩ RON |
| Isolation Rating | 1.5 kVRMS safety isolation with >100 kV/µs CMTI-enables reliable operation in noisy industrial environments |
| Supply Voltage Range | VDD1 logic supply: 2.25 V–5.5 V; VDD2 switch supply: 9 V–32 V-supports direct interfacing with 3.3 V MCUs and 24 V industrial rails |
| Inrush Current Mode | 8 A peak for 20 ms per channel-enables cold-start driving of incandescent lamps and high-inertia solenoids |
| Diagnostics Reporting | Open-circuit warning, VDD2 low-voltage warning (VDD2_WRN), and fault indication (FLT) via dedicated open-drain pins-no SPI required for basic monitoring |
| Operating Temperature | –40 °C to +125 °C ambient-qualified for extended use in uncooled control cabinets and field-mounted I/O modules |
| Package | 9 mm × 9 mm DFN-32 with exposed thermal pad-supports high-power dissipation in compact industrial PCB layouts |
Pinout & Package
SI83412BAA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with wettable flanks and an exposed thermal pad for enhanced thermal performance in industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic interface supply | 2.25 V–5.5 V input powering digital side; powers internal diode if logic source supplies current |
| GND1 | Logic ground reference | Reference for VDD1 and all logic-level inputs; must be separated from GND2 by isolation barrier |
| OE | Asynchronous output enable | Active-high global enable controlling both channels simultaneously; overrides individual inputs during fault conditions |
| A1, A2 | Channel input controls | Parallel logic inputs determining ON/OFF state of B1/B2 outputs; compatible with 2.25 V MCU GPIO |
| B1, B2 | Low-side switch outputs | Drain terminals sinking up to 1.25 A each; internally clamped for inductive kickback protection |
| VDD2 | Switch power supply | 9 V–32 V analog rail powering output stage; monitored for UVLO and warning thresholds |
| GND2 | Power ground reference | Return path for VDD2 and B1/B2 loads; electrically isolated from GND1 by CMOS barrier |
| VDD2_WRN | VDD2 low-voltage indicator | Active-low open-drain output asserting when VDD2 drops below warning threshold (VDD2UV9) |
| FLT | Fault status indicator | Active-low open-drain output asserting on any detected fault (overcurrent, overtemperature, open-circuit, etc.) |
| LED1, LED2 | Channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1/B2-directly drive LEDs or optocouplers |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic CMOS isolation | Replaces optocouplers with >100 kV/µs CMTI and 1.5 kVRMS rating-eliminates LED aging and improves long-term timing stability |
| Multi-voltage smart output clamp | Handles unlimited demagnetization energy (EAS) while enabling fast turn-OFF-reduces contact arcing in relay drivers and extends mechanical life |
| Inrush Current Mode | Delivers 8 A for 20 ms per channel-enables reliable cold-start of tungsten-filament lamps and high-inductance solenoids without external circuitry |
| Parallel-only interface | No SPI required; full functionality accessible via OE, A1/A2, and indicator pins-reduces MCU GPIO count and firmware complexity |
| Comprehensive fault protection | Independent monitoring of VDD1, VDD2, channel current, die temperature, and load continuity-prevents catastrophic failure under overload or wiring faults |
| Industrial-grade packaging | DFN-32 with exposed thermal pad and wettable flanks-supports automated optical inspection (AOI) and high-reliability reflow in harsh-environment manufacturing |
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 strict isolation and diagnostic requirements. IC Role / Device Role / Timing Role: Low-side switch providing galvanically isolated, current-limited, and fault-monitored load control per channel. Use Value: Eliminates need for discrete optocouplers, MOSFETs, and protection diodes-reducing BOM count by ≥7 components per channel while enabling real-time open-circuit detection. |
Use Scenario: Controlling multiple field sensors and actuators in distributed I/O nodes where space, thermal management, and diagnostic visibility are constrained. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering precise 10 µs update rate and synchronized fault reporting across channels. Use Value: Enables single-chip replacement of dual-channel opto-MOSFET solutions with integrated VDD2 monitoring and LED-status feedback-reducing board area by 40% versus discrete alternatives. |
| Motion Controller I/O Expansion | Smart Solid-State Relay Module |
|
Use Scenario: Adding isolated digital outputs to servo drive auxiliary I/O for brake release, limit switch supervision, and emergency stop interlocks. IC Role / Device Role / Timing Role: Fault-tolerant low-side switch with asynchronous OE override and inrush support for electromagnetic brakes. Use Value: Provides deterministic 10 µs response and built-in overtemperature shutdown-ensuring fail-safe behavior during motor stall or short-circuit events. |
Use Scenario: Building compact, DIN-rail-mountable solid-state relays for HVAC and building automation systems requiring UL/CSA safety certification. IC Role / Device Role / Timing Role: Isolated smart switch delivering certified 1.5 kVRMS isolation and eight diagnostic reports via parallel interface. Use Value: Meets IEC 61131-2 compliance with no external isolation components-accelerating time-to-certification for Class I and Class II equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-side isolated switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83412BBA-IFR | Same 2-channel low-side architecture but omits LED1/LED2 channel status indicators and VDD2_WRN pin | Lacks per-channel visual feedback and VDD2 warning capability-suitable only where diagnostics are handled exclusively via FLT | Select SI83412BBA-IFR only when board space or pin count constraints prohibit use of LED/VDD2_WRN signals |
| SI83412BCA-IFR | Includes open-channel indicator (OPEN_CH) and clear-fault input (FLT_CLR), but removes LED1/LED2 and VDD2_WRN | Enables remote fault clearing and open-load detection, but sacrifices local status visibility and supply warning | Choose SI83412BCA-IFR when centralized fault management and open-circuit verification are prioritized over local LED feedback |
Compared with SI83412BAA-IFR, SI83412BBA-IFR reduces diagnostic visibility by removing LED and VDD2_WRN pins, while SI83412BCA-IFR trades local status indicators for remote fault-clearing and open-circuit detection-making SI83412BAA-IFR the optimal choice for applications requiring immediate per-channel status and supply health feedback without added control logic.
Availability
SI83412BAA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial data acquisition systems, and motion controller I/O expansion requiring stable component supply, long lifecycle support, and certified isolation performance.
Supply support for SI83412BAA-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 infrastructure, automotive, and industrial markets.
The Si834x product line was developed to replace legacy optocoupler-based relay drivers with robust, high-CMTI, digitally intelligent isolated switches optimized for industrial control and factory automation applications.
FAQ
What is the maximum continuous current per channel for SI83412BAA-IFR?
The SI83412BAA-IFR delivers 1.25 A continuous output current per channel at 78 mΩ RON, validated across –40 °C to +125 °C ambient with proper PCB thermal design. This rating assumes VDD2 ≥ 24 V and adequate copper pour on the DFN-32 exposed pad. Derating applies below 24 V or above 100 °C ambient.
Does SI83412BAA-IFR support SPI communication?
No, SI83412BAA-IFR uses a parallel-only interface with dedicated A1/A2 inputs, OE enable, and open-drain indicator pins (LED1/LED2, FLT, VDD2_WRN). It does not include MOSI/MISO/SCLK/NSS pins or SPI register access-unlike SI83412BDA-IFR variants. All diagnostics are reported directly on pins without serial protocol overhead.
How does the inrush current mode function on SI83412BAA-IFR?
When enabled via internal configuration (factory-set for SI83412BAA-IFR), the inrush current mode delivers 8 A peak for 20 ms per channel during initial turn-on-specifically designed for lamp filaments and solenoids with high cold resistance. The mode automatically disables after 20 ms or upon current drop below 1.25 A, reverting to normal 1.25 A continuous operation.
What isolation certifications apply to SI83412BAA-IFR?
SI83412BAA-IFR carries UL 1577 recognition (1500 VRMS/1 min), CSA certification to IEC 62368-1, and CQC approval to GB4943.1. It meets IEC 61131-2 for industrial programmable controllers and provides 1.5 kVRMS safety-rated isolation with >100 kV/µs common-mode transient immunity-verified per manufacturer test reports.
Can SI83412BAA-IFR drive both resistive and inductive loads?
Yes, SI83412BAA-IFR is explicitly qualified for resistive (e.g., lamps) and inductive (e.g., solenoids, relays) loads. Its multi-voltage smart clamp handles unlimited demagnetization energy (EAS), and integrated overcurrent/overtemperature protection prevents damage during inductive turn-OFF transients or sustained overload conditions.
SI83412BAA-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:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.7µs, 3.7µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -, 3µs
- 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)
SI83412BAA-IFR FAQ
1.How can I place an order for SI83412BAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83412BAA-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 SI83412BAA-IFR reliable?
The price and inventory of SI83412BAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83412BAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83412BAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83412BAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83412BAA-IFR?
SI83412BAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83412BAA-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 SI83412BAA-IFR?
For technical support, including SI83412BAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83412BAA-IFR requirements.
6.How does Aetrix verify that SI83412BAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83412BAA-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 SI83412BAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83412BAA-IFR?
All SI83412BAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83412BAA-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 SI83412BAA-IFR part is unused and in its original packaging.
Return procedure for SI83412BAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83412BAA-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
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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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