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Skyworks Solutions Inc. SI83404BBA-IF
- Part No.:
- SI83404BBA-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83404BBA-IF.pdf
- Description:
- FOUR CHANNEL SOURCING OUTPUT WIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
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Product details
Overview
SI83404BBA-IF from Skyworks Solutions is a 4-channel isolated high-side smart switch IC for industrial control, delivering 0.7 A continuous current per channel (RON = 155 mΩ), 9–32 V switch supply, 2.25–5.5 V logic supply, and 1.5 kVRMS galvanic isolation using CMOS-based RF isolation. It drives solenoids, relays, and lamps in PLC I/O modules with full fault protection and open-drain LED status indicators.
For engineers reviewing the SI83404BBA-IF datasheet, SI83404BBA-IF pinout, SI83404BBA-IF application, or SI83404BBA-IF equivalent, key selection considerations include its parallel-only interface (no SPI), absence of inrush current mode, presence of channel status indicators (LED1–LED4), lack of VDD2_WRN and OPEN_CH pins, and compatibility with 9×9 mm DFN-32 packaging in industrial temperature range (−40°C to +125°C).
Technical Context
The SI83404BBA-IF implements four independent galvanically isolated high-side switches using Skyworks' RF-based CMOS isolation barrier, each with dedicated voltage/current/temperature sensing and a multi-voltage output clamp for unlimited EAS handling. Its parallel input interface uses dedicated An and OE pins for deterministic, low-latency switching without protocol overhead.
Control timing is defined by fixed propagation delays (tPLH = 10 µs max, tPHL = 10 µs max) and startup/shutdown sequences tied to VDD1 and VDD2 thresholds. Fault reporting is conveyed via active-low open-drain FLT and LEDn pins-no SPI communication channel is present, distinguishing it from Si834xxxDx/Fx variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent high-side switches with isolated outputs |
| Continuous Current | 0.7 A per channel - supports standard industrial loads like 24 V DC solenoids and indicator lamps |
| RON | 155 mΩ max - minimizes power loss and thermal rise at rated load |
| Isolation Rating | 1.5 kVRMS - meets reinforced insulation requirements for PLC backplane and field-side separation |
| Logic Supply | 2.25–5.5 V - interfaces directly with low-voltage MCUs (e.g., ARM Cortex-M0+) without level-shifting |
| Switch Supply | 9–32 V - compatible with standard industrial 24 V DC power rails |
| CMTI | >100 kV/µs - ensures robust operation in noisy factory environments with fast transients |
| Operating Temp | −40°C to +125°C - qualified for extended use in uncooled control cabinets and motor drive enclosures |
Pinout & Package
SI83404BBA-IF is housed in a compact 9×9 mm, 32-pin DFN package with exposed thermal pad (EP), optimized for high-density industrial PCB layouts and thermal dissipation under sustained 0.7 A/channel load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface side (2.25–5.5 V); internal UVLO at ~2.05 V |
| GND1 | Logic ground | Reference for all logic-side signals; must be separated from GND2 by isolation barrier |
| OE | Output enable (active-high) | Global enable/disable for all 4 channels; overrides individual An inputs when low |
| A1–A4 | Parallel channel inputs | Direct logic-level control inputs (TTL/CMOS compatible); high = ON for high-side switch |
| VDD2 | Switch supply input | Powers output stage (9–32 V); monitored for undervoltage warning and fault shutdown |
| GND2 | Power ground | Return path for switched loads; electrically isolated from GND1 |
| B1–B4 | High-side switch outputs | Source terminals driving loads to GND2; each rated for 0.7 A continuous, 155 mΩ RON |
| FLT | Fault indicator (open-drain) | Active-low signal asserting any detected fault (overcurrent, overtemp, UV, etc.) |
| LED1–LED4 | Channel status indicators (open-drain) | Active-low outputs reflecting real-time ON/OFF state of B1–B4; usable for panel LEDs or optocoupler inputs |
| DNC / NC | No-connect / no-function | Unbonded or reserved pins - must be left floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation barrier | RF-modulated CMOS isolation enables 1.5 kVRMS rating and >100 kV/µs CMTI without LED aging or drift |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-off while maintaining fast 10 µs switching |
| Parallel-only interface | Eliminates SPI complexity and firmware overhead - ideal for deterministic real-time I/O where diagnostics are secondary |
| Open-drain channel indicators | LED1–LED4 provide immediate visual or logic-level feedback of each switch's output state without external circuitry |
| Comprehensive fault protection | Integrated overcurrent, overtemperature, VDD1/VDD2 undervoltage, and open-load detection with automatic shutdown |
| Industrial-grade packaging | 9×9 mm DFN-32 with exposed pad supports automated assembly and delivers >1.5 W thermal dissipation in still air |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
Use Scenario: Mounting on DIN-rail mounted PLC backplanes to drive field-side solenoids, valves, and pilot lights. IC Role / Device Role / Timing Role: High-side switch providing isolated 24 V DC output with real-time status feedback and fault containment. Use Value: Replaces discrete optocoupler + MOSFET + protection circuits with single-chip solution, reducing BOM count by 60% and board area by 45%. | Use Scenario: Integrating into modular DAQ chassis for monitoring and controlling factory sensors and actuators. IC Role / Device Role / Timing Role: Isolated output driver enabling safe, noise-immune actuation of analog and digital field devices. Use Value: Enables simultaneous control of up to four independent loads with guaranteed 10 µs update rate and diagnostic visibility via LED indicators. |
| Motion Control I/O Terminal Block | Smart Solid-State Relay Replacement |
Use Scenario: Mounted on servo drive I/O expansion boards to manage brake release, cooling fans, and limit switches. IC Role / Device Role / Timing Role: Galvanically isolated high-side switch with thermal and overcurrent protection for safety-critical motion subsystems. Use Value: Provides fail-safe shutdown on overtemperature or short-circuit events, eliminating risk of uncontrolled motor coasting or overheating. | Use Scenario: Direct drop-in replacement for electromechanical relays in HVAC controllers and lighting panels. IC Role / Device Role / Timing Role: Solid-state alternative offering silent operation, 100× longer lifetime, and zero contact bounce. Use Value: Delivers 0.7 A @ 24 V DC with 155 mΩ RON, reducing heat generation by 70% vs. legacy relay solutions while supporting 100 k-cycle reliability. |
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 |
|---|---|---|---|
| SI83404AAA-IF | Includes Inrush Current Mode (8 A for 20 ms) and VDD2_WRN pin; same pinout and package | Required for lamp loads with high cold-filament inrush; adds diagnostic capability not present in SI83404BBA-IF | Select SI83404AAA-IF if driving incandescent lamps or other high-inrush resistive loads |
| SI83414BAA-IF | 4-channel low-side configuration (sink) instead of high-side (source); identical electrical specs otherwise | Suitable when load return path is common to system ground (GND2), simplifying wiring in grounded-load architectures | Select SI83414BAA-IF when interfacing with grounded solenoids or PLC inputs requiring sink-type signaling |
Compared with SI83404AAA-IF, SI83404BBA-IF omits inrush support and VDD2_WRN but reduces system complexity for steady-state loads; versus SI83414BAA-IF, it provides sourcing topology essential for floating-load configurations typical in industrial field wiring.
Availability
SI83404BBA-IF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial data acquisition systems, and motion controller I/O modules requiring stable component supply across extended production lifecycles.
Supply support for SI83404BBA-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 I/O consolidation, replacing optocoupler-based relay drivers with integrated, isolated smart switches featuring built-in diagnostics and robust EMC performance.
FAQ
What is the maximum continuous current per channel for the SI83404BBA-IF?
The SI83404BBA-IF supports 0.7 A continuous current per channel at ambient temperatures up to +85°C with proper PCB copper pour. At +125°C case temperature, derating applies per the thermal characteristics in the datasheet. This rating is validated with the specified 155 mΩ RON and ensures reliable operation driving standard 24 V DC solenoids and indicator lamps without external heatsinking.
Does the SI83404BBA-IF support SPI communication?
No, the SI83404BBA-IF does not support SPI communication. It uses a parallel-only interface with dedicated A1–A4 inputs and OE control. Diagnostics are reported solely through the active-low open-drain FLT and LED1–LED4 pins. For SPI-capable variants, consider SI83404BDA-IF or SI83404ADA-IF - those part numbers explicitly include "D" in the suffix denoting SPI functionality.
What isolation voltage rating does the SI83404BBA-IF have?
The SI83404BBA-IF is safety-rated for 1.5 kVRMS galvanic isolation between logic (VDD1/GND1) and power (VDD2/GND2) domains. This rating complies with UL 1577 recognition and supports reinforced insulation per IEC 61131-2 for industrial control equipment. The isolation barrier uses Skyworks' proprietary RF-CMOS technology, delivering >100 kV/µs common-mode transient immunity.
Can the SI83404BBA-IF drive inductive loads like relays and solenoids?
Yes, the SI83404BBA-IF is specifically engineered for inductive loads. Its integrated multi-voltage output clamp safely handles unlimited demagnetization energy (EAS) during turn-off, preventing voltage spikes that could damage the switch or surrounding circuitry. This enables reliable, arc-free switching of 24 V DC relays and solenoids commonly used in PLC output stages without external snubbers or clamps.
What is the operating temperature range of the SI83404BBA-IF?
The SI83404BBA-IF is fully specified for operation from −40°C to +125°C ambient temperature. This extended range supports deployment in harsh industrial environments including unventilated control cabinets, outdoor enclosures, and proximity to motors or power converters. Thermal performance is validated with the 9×9 mm DFN-32 package and exposed thermal pad, ensuring stable 0.7 A/channel operation across the full range when PCB layout follows Skyworks' recommended copper area guidelines.
SI83404BBA-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:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Bidirectional, 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)
SI83404BBA-IF FAQ
1.How can I place an order for SI83404BBA-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83404BBA-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 SI83404BBA-IF reliable?
The price and inventory of SI83404BBA-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83404BBA-IF is usually 5 days.
3.What payment methods are accepted for SI83404BBA-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83404BBA-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83404BBA-IF?
SI83404BBA-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83404BBA-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 SI83404BBA-IF?
For technical support, including SI83404BBA-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83404BBA-IF requirements.
6.How does Aetrix verify that SI83404BBA-IF is sourced from the original manufacturer or authorized distributors?
All SI83404BBA-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 SI83404BBA-IF meets industry standards.
7.What is the process for return or replacement of SI83404BBA-IF?
All SI83404BBA-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI83404BBA-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 SI83404BBA-IF part is unused and in its original packaging.
Return procedure for SI83404BBA-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83404BBA-IF 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.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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