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Skyworks Solutions Inc. SI83402BAA-IFR
- Part No.:
- SI83402BAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83402BAA-IFR.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,745
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Product details
Overview
SI83402BAA-IFR from Skyworks Solutions is a dual-channel isolated high-side smart switch IC with galvanic isolation, 1.25 A continuous output current per channel, 78 mΩ RON, 9–32 V switch supply, and 2.25–5.5 V logic supply-designed for industrial PLC output modules driving solenoids and relays.
For engineers reviewing the SI83402BAA-IFR datasheet, SI83402BAA-IFR pinout, SI83402BAA-IFR application, or SI83402BAA-IFR equivalent, key selection considerations include its dual high-side sourcing capability, parallel-only interface (no SPI), absence of inrush mode, presence of channel status indicators (LED1/LED2), and lack of open-channel or low-voltage warning indicators.
Technical Context
The SI83402BAA-IFR implements two independent isolated high-side switches using RF-based CMOS isolation, each with dedicated voltage/current/temperature sensing and multi-voltage clamp protection. It operates without SPI-relying solely on parallel inputs (A1/A2) and OE control, with diagnostics reported via active-low open-drain LED pins only.
Its fault handling includes overcurrent, overtemperature, and undervoltage protection, with fault status communicated through FLT and LEDn outputs. The device supports fast 10 µs update rate and delivers up to 1.25 A per channel at 78 mΩ RON, optimized for resistive and inductive loads in harsh industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 2 independent high-side sourcing switches |
| Continuous Output Current | 1.25 A per channel-supports solenoids and relays without external heatsinking under typical industrial ambient conditions |
| RON | 78 mΩ max per channel-minimizes conduction loss and thermal rise at full load |
| Switch Supply Range | 9 V–32 V-compatible with standard 24 V DC industrial power rails |
| Logic Supply Range | 2.25 V–5.5 V-interfacing directly with low-power MCUs including 3.3 V and 5 V systems |
| Isolation Rating | 1.5 kVRMS-meets safety requirements for reinforced insulation in PLC I/O modules |
| CMTI | >100 kV/µs-ensures robust operation in electrically noisy factory environments |
| Operating Temperature | −40 °C to +125 °C-qualified for extended use in uncontrolled industrial enclosures |
Pinout & Package
SI83402BAA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad, optimized for high-density industrial PCB layouts and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface and isolation transmitter side; accepts 2.25–5.5 V |
| VDD2 | Switch supply input | Powers high-side output stage; accepts 9–32 V; monitored for undervoltage |
| GND1 | Logic ground | Reference for logic inputs and SPI (not used in this variant); isolated from GND2 |
| GND2 | Power ground | Return path for switched loads; isolated from GND1 by 1.5 kVRMS barrier |
| A1 / A2 | Parallel channel enable inputs | Active-high logic inputs controlling B1/B2 outputs; no SPI required |
| OE | Output enable | Asynchronous global enable/disable for both channels; overrides A1/A2 when low |
| B1 / B2 | High-side switch outputs | Source current to loads; each rated 1.25 A continuous, 78 mΩ RON |
| 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, UV) is detected |
| DNC / NC | No-connect | Not internally connected; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | Enables safe separation between MCU and 24 V field-side circuits without optocoupler aging or CMTI degradation |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-off, enabling fast, arc-free relay/solenoid switching |
| Dedicated channel status indicators | LED1/LED2 provide immediate visual or logic-level feedback of B1/B2 output state without SPI polling |
| Overcurrent and overtemperature protection | Automatically limits or shuts down outputs under fault, preserving device and load integrity without external circuitry |
| Undervoltage monitoring on VDD1/VDD2 | Prevents erratic behavior by disabling outputs when either supply drops below safe operating threshold |
| Fast 10 µs update rate | Supports high-speed sequencing of industrial actuators with minimal latency between command and actuation |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Controller |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and small contactors in modular PLC backplanes with space-constrained I/O slots. IC Role / Device Role / Timing Role: Dual high-side switch providing isolated, protected, and status-indicated 24 V sourcing per channel. Use Value: Eliminates need for discrete MOSFETs, gate drivers, and optocouplers-reducing BOM count and improving reliability over legacy designs. | Use Scenario: Controlling stepper motor hold coils and brake solenoids in servo drive auxiliary I/O sections. IC Role / Device Role / Timing Role: Isolated high-side driver delivering precise 1.25 A per channel with fast 10 µs response for synchronized motion sequences. Use Value: Enables compact, thermally efficient design with built-in diagnostics-reducing debug time during commissioning and field service. |
| Smart Solid-State Relay (SSR) Board | Industrial Data Acquisition System |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted SSR modules requiring long life and silent operation. IC Role / Device Role / Timing Role: Dual-channel isolated switch with LED status and FLT fault reporting for local and remote monitoring. Use Value: Delivers >100 million cycles lifetime with zero contact wear, while LED1/LED2 simplify end-user verification of actuator engagement. | Use Scenario: Conditioning and isolating digital control signals in distributed I/O nodes for factory floor sensor networks. IC Role / Device Role / Timing Role: High-side driver interfacing microcontroller GPIOs to 24 V field-side actuators with galvanic noise immunity. Use Value: Provides >100 kV/µs CMTI and −40 °C to +125 °C operation-ensuring stable signal integrity across wide temperature and EMI ranges. |
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 |
|---|---|---|---|
| SI83402BBA-IFR | Lacks LED1/LED2 channel status indicators; otherwise identical pinout, ratings, and interface | Suitable where visual/status feedback is unnecessary and board space or cost optimization is prioritized | Select SI83402BBA-IFR only if channel status indication is omitted from system requirements |
| SI83404BAA-IFR | Four-channel version with 0.7 A/channel and 155 mΩ RON; same package and interface | Used when higher channel density is needed at lower per-channel current, e.g., multi-valve control panels | Choose SI83404BAA-IFR when expanding from 2 to 4 loads without changing PCB footprint or logic interface |
Compared with SI83402BBA-IFR, SI83402BAA-IFR adds LED status visibility without increasing complexity or cost; compared with SI83404BAA-IFR, it trades channel count for higher per-channel current and lower RON, optimizing for dual high-power actuator control.
Availability
SI83402BAA-IFR 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 qualification, and guaranteed traceability.
Supply support for SI83402BAA-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 specifically to replace optocoupler-based relay drivers in industrial control systems-delivering higher reliability, faster timing, integrated diagnostics, and simplified system-level certification.
FAQ
What is the maximum continuous current rating per channel for SI83402BAA-IFR?
The SI83402BAA-IFR supports 1.25 A continuous output current per channel under typical industrial ambient conditions (TA ≤ 85 °C) with adequate PCB copper area. This rating is validated at 78 mΩ RON and applies to both B1 and B2 high-side outputs. Derating is required above 85 °C ambient per the thermal characteristics in the official Skyworks datasheet.
Does SI83402BAA-IFR support SPI communication?
No, SI83402BAA-IFR does not support SPI communication. It is a parallel-interface-only variant (denoted by "BAA" in the ordering code), using dedicated A1/A2 inputs and OE control. Diagnostics are reported exclusively via active-low open-drain LED1, LED2, and FLT pins-no register access or configuration is possible.
What isolation rating and safety certifications apply to SI83402BAA-IFR?
SI83402BAA-IFR provides 1.5 kVRMS galvanic isolation with >100 kV/µs CMTI. It is UL 1577 recognized (1500 Vrms, 1 min), CSA certified to 62368-1, and CQC approved to GB4943.1. These approvals are pending final documentation but align with the full Si834x family qualification program.
Can SI83402BAA-IFR drive inductive loads like solenoids safely?
Yes, SI83402BAA-IFR safely drives inductive loads using its integrated multi-voltage smart output clamp, which handles unlimited demagnetization energy (EAS) and enables fast, arc-free turn-off. This eliminates external flyback diodes and protects against inductive kickback-critical for solenoid and relay coil switching in industrial environments.
What is the function of the LED1 and LED2 pins on SI83402BAA-IFR?
LED1 and LED2 are active-low, open-drain indicator pins that reflect the real-time ON/OFF state of outputs B1 and B2 respectively. When B1 is ON, LED1 is pulled low; when OFF, LED1 remains high-impedance. They enable direct LED connection or logic-level monitoring without SPI, simplifying status verification in PLC and SSR applications.
SI83402BAA-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):
- 3.5µs, 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)
SI83402BAA-IFR FAQ
1.How can I place an order for SI83402BAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83402BAA-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 SI83402BAA-IFR reliable?
The price and inventory of SI83402BAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83402BAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83402BAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83402BAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83402BAA-IFR?
SI83402BAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83402BAA-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 SI83402BAA-IFR?
For technical support, including SI83402BAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83402BAA-IFR requirements.
6.How does Aetrix verify that SI83402BAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83402BAA-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 SI83402BAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83402BAA-IFR?
All SI83402BAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83402BAA-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 SI83402BAA-IFR part is unused and in its original packaging.
Return procedure for SI83402BAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83402BAA-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
-
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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