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Skyworks Solutions Inc. SI83412BCA-IF
- Part No.:
- SI83412BCA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83412BCA-IF.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:2,877
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Product details
Overview
SI83412BCA-IF from Skyworks Solutions is a dual-channel, isolated low-side smart switch IC designed for industrial load control in PLC and motion controller systems. It delivers 1.25 A continuous current per channel, features 1.5 kVRMS galvanic isolation, supports 9 V–32 V switch supply and 2.25 V–5.5 V logic supply, and provides open-drain fault reporting with overcurrent, overtemperature, and undervoltage protection.
For engineers reviewing the SI83412BCA-IF datasheet, SI83412BCA-IF pinout, SI83412BCA-IF application, or SI83412BCA-IF equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial use cases, and two rigorously cross-referenced alternative parts - all aligned to Skyworks' official Si834x family documentation dated March 2023.
Technical Context
The SI83412BCA-IF implements two independent low-side switches with CMOS-based galvanic isolation, each featuring integrated voltage, current, and temperature sensing. Its isolation barrier uses RF carrier modulation (not optical), enabling >100 kV/µs CMTI and eliminating startup initialization requirements.
Switch control is handled via parallel logic inputs and an asynchronous OE pin; diagnostics are reported through dedicated open-drain indicator pins - specifically VDD2_WRN and FLT - without SPI interface support. The device includes a multi-voltage output clamp for unlimited EAS handling and Inrush Current Mode is disabled per ordering guide Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 2 independent low-side switches, each rated for 1.25 A continuous current at 78 mΩ RON |
| Isolation Rating | 1.5 kVRMS safety-rated isolation with >100 kV/µs common-mode transient immunity |
| Supply Voltages | VDD1 logic supply: 2.25 V–5.5 V; VDD2 switch supply: 9 V–32 V |
| Fault Reporting | Dedicated active-low open-drain FLT pin and VDD2_WRN pin - no SPI interface |
| Protection Features | Overcurrent, overtemperature, VDD2 undervoltage lockout, and open-circuit detection |
| Operating Temperature | –40 °C to +125 °C ambient, qualified for industrial environments |
| Inrush Mode | Not supported - confirmed by Si834x Ordering Guide entry for SI83412BCA-IF |
Pinout & Package
SI83412BCA-IF 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 1.25 A loads.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Accepts 2.25 V–5.5 V; powers internal digital circuitry and isolation transmitter side |
| VDD2 | Switch supply input | Accepts 9 V–32 V; powers output stage and isolation receiver side; monitored for UV warning |
| GND1 / GND2 | Logic / power ground | Galvanically separated grounds - GND1 for logic domain, GND2 for high-voltage switch domain |
| OE | Asynchronous output enable | Active-high; disables all outputs immediately when pulled low - no propagation delay |
| A1 / A2 | Parallel logic inputs | Direct control of B1/B2 outputs; high = ON (low-side sink), low = OFF |
| B1 / B2 | Low-side switch outputs | Open-drain NMOS outputs; each sinks up to 1.25 A continuously into GND2 |
| FLT | Fault indicator | Active-low open-drain output asserting when any fault (overcurrent, overtemp, UV) is detected |
| VDD2_WRN | Switch supply warning | Active-low open-drain output asserting when VDD2 drops below warning threshold (VDD2UV9) |
| NC / DNC | No-connect / do-not-connect | Unbonded or reserved pins - must be left floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation architecture | CMOS-based RF-modulated barrier - eliminates LED aging, enables >100 kV/µs CMTI and 1.5 kVRMS rating |
| Low-side switch topology | Two independent NMOS outputs with 78 mΩ RON - optimized for sinking inductive/resistive loads to GND2 |
| Dedicated fault signaling | Separate FLT and VDD2_WRN open-drain pins - enable immediate system-level response without SPI polling |
| Robust protection suite | Real-time monitoring of current, temperature, and VDD2 with automatic shutdown on fault detection |
| Industrial-grade packaging | 9×9 mm DFN-32 with exposed thermal pad - supports conduction cooling in high-ambient environments |
Applications
| Programmable Logic Controllers (PLCs) | Industrial Motion Controllers |
|---|---|
|
Use Scenario: Driving solenoid valves and relay coils in modular I/O modules of DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Low-side switch providing isolated, current-limited actuation with real-time fault feedback to the controller CPU. Use Value: Enables direct replacement of optocoupler + discrete MOSFET solutions while reducing board space and improving reliability via integrated diagnostics. |
Use Scenario: Controlling brake coils and hold circuits in servo drive auxiliary stages. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering synchronized, protected switching for safety-critical braking functions. Use Value: Guarantees fast turn-off (<10 µs propagation delay) and demagnetization energy handling to prevent contact arcing in inductive brake loads. |
| Smart Solid-State Relays | Industrial Data Acquisition Systems |
|
Use Scenario: Building compact, self-monitoring SSR modules for panel-mount machine control. IC Role / Device Role / Timing Role: Core switching element with built-in VDD2 warning and fault latching - eliminates need for external supervision circuitry. Use Value: Reduces BOM count by integrating isolation, protection, and status indication into a single DFN-32 package. |
Use Scenario: Isolating digital output channels in ruggedized DAQ units deployed in factory-floor test benches. IC Role / Device Role / Timing Role: Galvanically isolated interface between microcontroller GPIO and 24 V field actuators. Use Value: Maintains signal integrity across noisy industrial environments while supporting wide input voltage tolerance (9–32 V). |
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-IF | Same 2-channel low-side topology and 1.25 A rating, but lacks VDD2_WRN pin - only FLT reporting | Suitable where only global fault indication is required, not supply warning granularity | Select when system-level VDD2 monitoring is handled externally or unnecessary |
| SI83412BCA-IFR | Identical electrical and functional specification; "R" suffix denotes tape-and-reel packaging only | No functional difference - identical performance and pinout in production volumes | Select for automated SMT assembly; same design-in qualification as SI83412BCA-IF |
Compared with SI83412BBA-IF, SI83412BCA-IF adds VDD2_WRN for early supply degradation detection - critical for predictive maintenance in unattended PLC modules. Compared with SI83412BCA-IFR, the base part offers identical functionality in cut-tape or tray formats for prototyping and low-volume builds.
Availability
SI83412BCA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relays requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for SI83412BCA-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 high-reliability industrial, automotive, and communications markets.
The SI83412BCA-IF belongs to Skyworks' Si834x isolated smart switch product line - engineered to replace optocoupler-based relay drivers with integrated protection, diagnostics, and CMOS isolation for industrial control systems.
FAQ
What is the maximum continuous current per channel for the SI83412BCA-IF?
The SI83412BCA-IF delivers 1.25 A continuous current per channel at 78 mΩ RON, as specified in Table 1 of the Si834x Ordering Guide and confirmed in the Key Features section of the datasheet. This rating applies under full thermal derating at +125 °C ambient with proper PCB copper area and airflow.
Does the SI83412BCA-IF support SPI communication?
No, the SI83412BCA-IF does not support SPI. Per the Si834x Ordering Guide, its interface type is "Parallel" only - control is via A1/A2 inputs and OE, with diagnostics reported solely through FLT and VDD2_WRN pins. SPI capability is reserved for parts with "D", "F", or "A" suffixes in the fourth character position.
What isolation rating does the SI83412BCA-IF provide?
The SI83412BCA-IF provides 1.5 kVRMS safety-rated galvanic isolation, certified to UL 1577 (pending), CSA 62368-1, and CQC GB4943.1. Its CMOS-based RF isolation achieves >100 kV/µs common-mode transient immunity - significantly exceeding legacy optocoupler performance.
Is Inrush Current Mode enabled on the SI83412BCA-IF?
No, Inrush Current Mode is disabled on the SI83412BCA-IF. Table 1 of the Si834x Ordering Guide explicitly lists "No" under the Inrush Current Mode column for this part number - distinguishing it from variants like SI83412BBA-IF or SI83414AAA-IF which support 8 A for 20 ms.
What package type is used for the SI83412BCA-IF?
The SI83412BCA-IF uses a 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), as stated in the Key Features section and confirmed in Figure 2 of the datasheet. This compact, surface-mount package supports high-power density and efficient thermal transfer in industrial PCB designs.
SI83412BCA-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:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Bidirectional, 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)
SI83412BCA-IF FAQ
1.How can I place an order for SI83412BCA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83412BCA-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 SI83412BCA-IF reliable?
The price and inventory of SI83412BCA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83412BCA-IF is usually 5 days.
3.What payment methods are accepted for SI83412BCA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83412BCA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83412BCA-IF?
SI83412BCA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83412BCA-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 SI83412BCA-IF?
For technical support, including SI83412BCA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83412BCA-IF requirements.
6.How does Aetrix verify that SI83412BCA-IF is sourced from the original manufacturer or authorized distributors?
All SI83412BCA-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 SI83412BCA-IF meets industry standards.
7.What is the process for return or replacement of SI83412BCA-IF?
All SI83412BCA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83412BCA-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 SI83412BCA-IF part is unused and in its original packaging.
Return procedure for SI83412BCA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83412BCA-IF 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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