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Skyworks Solutions Inc. SI83412BBA-IFR
- Part No.:
- SI83412BBA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83412BBA-IFR.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,937
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Product details
Overview
SI83412BBA-IFR from Skyworks Solutions is a 2-channel isolated smart switch with low-side sinking output configuration, 1.25 A continuous current per channel, 78 mΩ RON, and 1.5 kVRMS safety-rated isolation. It integrates galvanic isolation, overcurrent/overtemperature/undervoltage protection, and open-circuit diagnostics for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83412BBA-IFR datasheet, SI83412BBA-IFR pinout, SI83412BBA-IFR application, or SI83412BBA-IFR equivalent, this page delivers verified specifications, fault-handling behavior, parallel interface timing, channel status indicator mapping, and substitution guidance for industrial control system design and BOM optimization.
Technical Context
The SI83412BBA-IFR implements two independent low-side sinking switches with dedicated isolation channels using Skyworks' CMOS-based RF isolation technology. Each channel features real-time current, voltage, and temperature sensing, multi-voltage clamp for unlimited EAS handling, and Inrush Current Mode disabled (per Ordering Guide).
Control uses parallel logic inputs (A1/A2) and asynchronous OE pin; diagnostics are reported via active-low open-drain LED1/LED2 pins only-no SPI interface. Fault detection includes overcurrent, overtemperature, VDD2 undervoltage, and open-load, with FLT pin asserting on any active fault condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Low-side sinking switch - sinks current to GND2, compatible with common-anode industrial loads. |
| Channels | 2 independent channels - supports dual solenoid or relay drive without external combining traces. |
| Continuous Current | 1.25 A per channel - enables direct drive of 24 V DC inductive loads up to 19.2 W at 78 mΩ RON. |
| Isolation Rating | 1.5 kVRMS - meets UL 1577 and IEC 61131-2 requirements for functional isolation in PLC I/O modules. |
| Logic Supply | 2.25 V–5.5 V - interoperable with modern low-voltage MCUs including ARM Cortex-M series. |
| Switch Supply | 9 V–32 V - supports standard industrial 24 V DC power rails with ±20% tolerance. |
| CMTI | >100 kV/µs - ensures robust operation in electrically noisy factory environments with fast transients. |
| Operating Temp | −40 °C to +125 °C - qualified for extended temperature range in cabinet-mounted control hardware. |
Pinout & Package
SI83412BBA-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 1.25 A load conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface; requires 2.25–5.5 V with bypass capacitor to GND1. |
| GND1 | Logic ground reference | Reference for VDD1 and all logic-level pins; must be separated from GND2 by isolation barrier. |
| A1, A2 | Channel input controls | Active-high parallel inputs controlling B1/B2 outputs; high = ON, low = OFF. |
| OE | Output enable | Asynchronous global enable; low disables all outputs regardless of A1/A2 state. |
| VDD2 | Switch supply input | Powers output stage; accepts 9–32 V; monitored for undervoltage warning and shutdown. |
| GND2 | Power ground reference | Reference for VDD2 and all output terminals; galvanically isolated from GND1. |
| B1, B2 | Low-side output terminals | Sink-switch outputs; connect to load cathodes; each rated for 1.25 A continuous. |
| LED1, LED2 | Channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1/B2. |
| FLT | Fault indicator | Active-low open-drain output asserting when any fault (overcurrent, overtemp, VDD2 UV, open-load) is detected. |
| VDD2_WRN | VDD2 warning indicator | Not present on SI83412BBA-IFR - omitted per Ordering Guide ('BBA' variant has no VDD2_WRN). |
| NC, DNC | No-connect / Do-not-connect | Unbonded or reserved pins; must remain unconnected per datasheet layout rules. |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation barrier | CMOS-based RF isolation delivering >100 kV/µs CMTI and 1.5 kVRMS rating - 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 in relay/solenoid applications. |
| Dedicated channel status reporting | LED1/LED2 provide immediate visual or logic-level feedback of B1/B2 ON/OFF state - enables local diagnostics without SPI bus overhead. |
| Comprehensive fault protection | Simultaneous monitoring of overcurrent, overtemperature, VDD2 undervoltage, and open-circuit conditions - forces safe shutdown before damage occurs. |
| Industrial-grade operating range | −40 °C to +125 °C ambient with full performance - validated for use in uncooled control cabinets and harsh factory environments. |
| IEC 61131-2 compliance | Meets Type 1/Type 3 input/output requirements for programmable controllers - simplifies certification of end equipment. |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Controller |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and small relays in modular PLC backplanes with strict isolation and diagnostic requirements. IC Role / Device Role: Low-side isolated switch providing galvanically separated load control and real-time channel status indication via LED1/LED2. Use Value: Eliminates need for discrete optocouplers and MOSFET drivers while delivering integrated fault reporting and 1.25 A per channel capability in a single DFN-32 package. | Use Scenario: Controlling stepper motor hold coils and brake actuators in servo drives where rapid response and thermal resilience are critical. IC Role / Device Role: Dual-channel sinking switch managing two independent inductive loads with simultaneous overtemperature and open-circuit detection. Use Value: Enables compact, thermally efficient motion control designs with built-in diagnostics reducing external sensor count and board area. |
| Smart Solid-State Relay (SSR) | Industrial Data Acquisition System |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted SSRs requiring silent operation, long life, and failure-mode visibility. IC Role / Device Role: Isolated low-side driver with FLT pin signaling fault events and LED1/LED2 confirming actuation - supports predictive maintenance. Use Value: Delivers 100× longer lifetime than EM relays and provides actionable diagnostics (e.g., open-coil detection) without adding microcontroller firmware complexity. | Use Scenario: Conditioning and isolating digital output signals from analog-to-digital subsystems in distributed I/O nodes. IC Role / Device Role: Galvanically isolated interface translating MCU GPIO states into robust 24 V DC outputs with channel-specific status feedback. Use Value: Ensures signal integrity across noisy plant-floor grounds while enabling per-channel health monitoring for system-level fault logging. |
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-IF | Tape-and-reel variant lacks carrier tape packaging; identical electrical and thermal specs. | No functional difference - same pinout, timing, and diagnostics; suitable for manual prototyping or small-batch assembly. | Select SI83412BBA-IFR for automated SMT production; choose SI83412BBA-IF for hand-soldered evaluation. |
| SI83412BCA-IF | Includes open-channel (OPEN_CH) indicator pin - adds load continuity monitoring not present on SI83412BBA-IFR. | Enables detection of broken wires or disconnected loads - useful in safety-critical systems requiring wire-break diagnostics. | Choose SI83412BCA-IF only if OPEN_CH functionality is required; otherwise SI83412BBA-IFR offers optimal cost/performance balance. |
Compared with SI83412BBA-IF and SI83412BCA-IF, the SI83412BBA-IFR provides identical switching performance and diagnostics but is optimized for high-volume automated assembly via tape-and-reel delivery, while SI83412BCA-IF adds an extra diagnostic pin at higher unit cost and no change to core isolation or drive capability.
Availability
SI83412BBA-IFR is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controllers, and smart solid-state relays requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for SI83412BBA-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 designed specifically for industrial control applications requiring reinforced isolation, integrated protection, and simplified migration from optocoupler-based relay drivers - targeting PLC, motion, and data acquisition systems.
FAQ
What is the maximum continuous current rating per channel for the SI83412BBA-IFR?
The SI83412BBA-IFR supports 1.25 A continuous current per channel at 78 mΩ RON, validated across the full −40 °C to +125 °C operating temperature range with adequate PCB copper area and thermal management. This rating applies to both B1 and B2 outputs under 24 V DC switch supply conditions.
Does the SI83412BBA-IFR include SPI interface capability?
No, the SI83412BBA-IFR uses a parallel-only interface with A1/A2 inputs and OE control - it does not include SPI functionality. Diagnostics are reported exclusively through active-low open-drain pins (LED1, LED2, FLT); SPI is available only on 'D' and 'F' suffix variants like SI83416BDA-IF.
What isolation voltage rating does the SI83412BBA-IFR meet?
The SI83412BBA-IFR provides 1.5 kVRMS safety-rated galvanic isolation per UL 1577, certified for 1 minute, and complies with IEC 61131-2 for programmable controller interfaces. Its CMOS-based RF isolation achieves >100 kV/µs common-mode transient immunity, exceeding optocoupler performance.
How does the SI83412BBA-IFR handle inductive load turn-off?
The SI83412BBA-IFR employs a proprietary multi-voltage output clamp that safely dissipates unlimited demagnetization energy (EAS) during inductive turn-off. This architecture enables fast, controlled turn-OFF without voltage overshoot - critical for preventing arcing in relay and solenoid applications.
What fault conditions trigger the FLT pin on the SI83412BBA-IFR?
The FLT pin on the SI83412BBA-IFR asserts low for overcurrent, overtemperature, VDD2 undervoltage, and open-circuit faults. It remains asserted until all active faults clear and the Clear Fault Delay (tCFD) expires - providing unambiguous system-level fault signaling without requiring SPI polling.
Is the SI83412BBA-IFR RoHS compliant and halogen-free?
Yes, the SI83412BBA-IFR is RoHS compliant and halogen-free per Skyworks' material declarations. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 and is qualified for lead-free reflow soldering per IPC/JEDEC J-STD-020 standards.
SI83412BBA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si834x
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-IFR FAQ
1.How can I place an order for SI83412BBA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83412BBA-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 SI83412BBA-IFR reliable?
The price and inventory of SI83412BBA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83412BBA-IFR is usually 5 days.
3.What payment methods are accepted for SI83412BBA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83412BBA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83412BBA-IFR?
SI83412BBA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83412BBA-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 SI83412BBA-IFR?
For technical support, including SI83412BBA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83412BBA-IFR requirements.
6.How does Aetrix verify that SI83412BBA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83412BBA-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 SI83412BBA-IFR meets industry standards.
7.What is the process for return or replacement of SI83412BBA-IFR?
All SI83412BBA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83412BBA-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 SI83412BBA-IFR part is unused and in its original packaging.
Return procedure for SI83412BBA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83412BBA-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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