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Skyworks Solutions Inc. SI83412BBA-IF
- Part No.:
- SI83412BBA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83412BBA-IF.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:4,729
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Product details
Overview
SI83412BBA-IF from Skyworks Solutions is a 2-channel isolated smart switch with low-side sinking configuration, 1.25 A continuous current per channel, 78 mΩ RON, and 1.5 kVRMS galvanic isolation. It integrates fault protection, diagnostics, and parallel interface control for industrial load switching in PLC I/O modules and motion controllers.
For engineers reviewing the SI83412BBA-IF datasheet, SI83412BBA-IF pinout, SI83412BBA-IF application, or SI83412BBA-IF equivalent, key selection considerations include its 2-channel low-side sinking topology, 9–32 V switch supply range, absence of SPI interface, presence of channel status indicators (LED1/LED2), and lack of VDD2 warning or open-channel reporting.
Technical Context
The SI83412BBA-IF implements two independent low-side sinking switches using Skyworks' CMOS-based RF isolation barrier, delivering >100 kV/µs CMTI and 1.5 kVRMS safety rating. Each channel features integrated voltage, current, and temperature sensing with autonomous overcurrent, overtemperature, and undervoltage protection.
Control uses dedicated parallel inputs (A1/A2) and asynchronous OE pin; diagnostics are reported via active-low open-drain LED1/LED2 pins only-no SPI, no FLT pin, no VDD2_WRN or OPEN_CH indicator. The device operates across –40°C to +125°C and complies with IEC 61131-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | 2-channel low-side sinking switch (open-drain) |
| Continuous Current | 1.25 A per channel at 25°C ambient |
| RON | 78 mΩ typical - enables low power loss and minimal self-heating under full load |
| Isolation Rating | 1.5 kVRMS for 1 minute - meets UL 1577 and CSA 62368-1 requirements |
| Switch Supply Range | 9 V–32 V - compatible with standard industrial DC bus voltages |
| Logic Supply Range | 2.25 V–5.5 V - supports direct interfacing with low-voltage MCUs |
| Operating Temperature | –40°C to +125°C - suitable for harsh industrial environments |
| Diagnostic Outputs | LED1 and LED2 (active-low, open-drain) - indicate real-time ON/OFF status per channel |
Pinout & Package
SI83412BBA-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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface; accepts 2.25–5.5 V; internal diode allows powering from logic inputs |
| GND1 | Logic ground | Reference for VDD1 and all logic-level signals (A1, A2, OE) |
| A1, A2 | Parallel channel enable inputs | Active-high logic inputs controlling sink path for B1 and B2 outputs respectively |
| OE | Asynchronous output enable | Global active-high enable/disable for both channels; overrides individual A1/A2 states |
| B1, B2 | Low-side switch outputs | Open-drain N-channel outputs capable of sinking up to 1.25 A each into loads |
| LED1, LED2 | Channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1/B2 |
| VDD2 | Switch supply input | Powers high-voltage side; 9–32 V range; monitored for undervoltage lockout |
| GND2 | Switch ground | Return path for VDD2 and B1/B2 load currents; galvanically isolated from GND1 |
| DNC, NC | No-connect / Not used | Unbonded or internally unused pins - must be left floating or tied to GND2 per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation barrier | CMOS-based RF isolation with >100 kV/µs CMTI - eliminates optocoupler aging and improves long-term reliability |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-off - prevents voltage overshoot and contact arcing |
| Overcurrent protection | Current-limited overload response with Inrush Current Mode disabled - optimized for stable resistive/inductive loads without surge handling |
| Thermal & supply monitoring | Integrated overtemperature shutdown and VDD2 undervoltage lockout - ensures safe operation under fault conditions |
| Channel status feedback | Dedicated LED1/LED2 pins provide immediate, hardware-level confirmation of B1/B2 output state - no SPI polling required |
Applications
| Programmable Logic Controllers (PLC) Digital Output Modules | Industrial Motion Control I/O |
|---|---|
Use Scenario: Driving solenoid valves and small relays in modular PLC backplanes where space, isolation, and diagnostic visibility are critical. IC Role / Device Role / Timing Role: Low-side sinking switch providing galvanically isolated, protected load control with real-time LED status feedback per channel. Use Value: Eliminates discrete optocoupler + MOSFET combinations; reduces board area by 60% vs. legacy solutions while enabling faster diagnostics via LED1/LED2. | Use Scenario: Controlling stepper motor enable lines and brake coils in servo drives requiring robust fault detection and industrial voltage compatibility. IC Role / Device Role / Timing Role: Isolated 2-channel sink driver with <10 µs propagation delay and autonomous overtemperature shutdown. Use Value: Prevents thermal runaway during extended hold conditions; LED1/LED2 allow immediate visual verification of actuator engagement without host MCU intervention. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition System Outputs |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted control panels where silent operation, long life, and vibration immunity are required. IC Role / Device Role / Timing Role: Dual-channel isolated solid-state switch with 1.25 A per channel and 78 mΩ RON - directly interfaces with 24 V DC control logic. Use Value: Enables >100 million switching cycles vs. ~100k for mechanical relays; LED1/LED2 simplify field maintenance and reduce troubleshooting time. | Use Scenario: Providing isolated digital outputs in modular DAQ chassis for driving external alarms, indicator lamps, or auxiliary actuators. IC Role / Device Role / Timing Role: Galvanically isolated 2-channel sink interface with independent status indication and wide 9–32 V supply tolerance. Use Value: Supports mixed-voltage system integration; LED1/LED2 eliminate need for external status LEDs or GPIO readback, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated low-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83412BBA-IFR | Tape-and-reel packaging variant; identical electrical and functional specs | No difference in circuit design or application behavior | Select for automated SMT assembly; same pinout, thermal, and timing performance |
| SI83412BCA-IF | Adds OPEN_CH open-circuit detection and reporting via dedicated pin | Enables load continuity monitoring - useful for safety-critical valve or brake circuits | Choose when open-load detection is required; otherwise SI83412BBA-IF offers simpler interface and lower cost |
Compared with SI83412BBA-IF, SI83412BBA-IFR provides identical functionality in tape-and-reel format for production use, while SI83412BCA-IF adds open-channel diagnostics at the cost of an extra pin and slightly higher complexity - making SI83412BBA-IF optimal for cost-sensitive, non-safety-critical 2-channel sinking applications.
Availability
SI83412BBA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relay designs requiring stable component supply, long-term industrial temperature support, and galvanic isolation integrity.
Supply support for SI83412BBA-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 infrastructure, automotive, and industrial markets.
The Si834x product line was designed specifically for industrial automation systems requiring high-reliability, isolated, intelligent load switching - replacing optocoupler-based drivers with integrated diagnostics and protection.
FAQ
What is the maximum continuous current rating per channel for the SI83412BBA-IF?
The SI83412BBA-IF delivers 1.25 A continuous current per channel at 25°C ambient temperature with proper PCB copper area and airflow. Derating applies above 85°C case temperature; full 1.25 A is maintained up to 105°C with 2 oz copper and 2 cm² thermal pad exposure. This rating is confirmed in Table 1 of the official Skyworks datasheet and validated across production lots.
Does the SI83412BBA-IF support SPI communication for diagnostics?
No, the SI83412BBA-IF does not include SPI functionality. It belongs to the "Parallel-only" variant group (denoted by "BBA" in the part number suffix) and reports diagnostics exclusively through active-low open-drain LED1 and LED2 pins. SPI capability is present only in "BDA", "ADA", and "AFA" variants - not in SI83412BBA-IF.
What isolation voltage rating does the SI83412BBA-IF have, and which safety standards does it meet?
The SI83412BBA-IF provides 1.5 kVRMS galvanic isolation rated for 1 minute, meeting UL 1577 recognition and CSA certification under 62368-1. It also complies with IEC 61131-2 for industrial control equipment. These ratings are verified per Skyworks' safety test reports and documented in Section 1 of the official datasheet.
Can the SI83412BBA-IF drive inductive loads like solenoids or relays safely?
Yes, the SI83412BBA-IF safely drives inductive loads using its integrated multi-voltage output clamp, which handles unlimited demagnetization energy (EAS) during turn-off. This prevents destructive voltage spikes and enables fast, arc-free switching - confirmed in the "Unique multi-voltage output clamp" feature list and Figure 24 of the datasheet.
What is the function of the OE (Output Enable) pin on the SI83412BBA-IF?
OE is an asynchronous, active-high global enable pin that overrides all channel inputs (A1/A2). When OE is low, both B1 and B2 outputs are forced OFF regardless of A1/A2 states. When OE is high, B1/B2 follow A1/A2. This enables system-level emergency shutdown or power sequencing control - detailed in Truth Table 3 and Section 3.1 of the datasheet.
SI83412BBA-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)
SI83412BBA-IF FAQ
1.How can I place an order for SI83412BBA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83412BBA-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 SI83412BBA-IF reliable?
The price and inventory of SI83412BBA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83412BBA-IF is usually 5 days.
3.What payment methods are accepted for SI83412BBA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83412BBA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83412BBA-IF?
SI83412BBA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83412BBA-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 SI83412BBA-IF?
For technical support, including SI83412BBA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83412BBA-IF requirements.
6.How does Aetrix verify that SI83412BBA-IF is sourced from the original manufacturer or authorized distributors?
All SI83412BBA-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 SI83412BBA-IF meets industry standards.
7.What is the process for return or replacement of SI83412BBA-IF?
All SI83412BBA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83412BBA-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 SI83412BBA-IF part is unused and in its original packaging.
Return procedure for SI83412BBA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83412BBA-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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