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Skyworks Solutions Inc. SI83402BCA-IFR
- Part No.:
- SI83402BCA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83402BCA-IFR.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,514
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Product details
Overview
SI83402BCA-IFR from Skyworks Solutions is a dual-channel isolated smart high-side switch IC designed for industrial load control in PLC I/O modules and motion controllers. It delivers 1.25 A continuous current per channel, features 1.5 kVRMS galvanic isolation, supports 9–32 V switch supply and 2.25–5.5 V logic supply, and integrates full fault protection including overcurrent, overtemperature, and undervoltage monitoring.
For engineers reviewing the SI83402BCA-IFR datasheet, SI83402BCA-IFR pinout, SI83402BCA-IFR application, or SI83402BCA-IFR equivalent, this page provides verified specifications, real-world diagnostic behavior, SPI/parallel interface compatibility, and validated alternative options for industrial solid-state relay replacement and safety-critical I/O design.
Technical Context
The SI83402BCA-IFR implements two independent high-side switches with CMOS-based RF isolation, each featuring dedicated voltage/current/temperature sensing and a multi-voltage output clamp for unlimited EAS handling. Its parallel-only interface uses dedicated OE and input pins without SPI, simplifying migration from optocoupler-based designs.
It operates with separate logic (VDD1) and switch (VDD2) supplies, supports inrush current mode only on variants with "A" suffix (not applicable here), and reports faults via active-low open-drain FLT and VDD2_WRN pins-no channel status LEDs or OPEN_CH indicator are enabled per ordering guide Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual high-side switch with independent isolation and protection |
| Continuous Current | 1.25 A per channel at 25°C ambient, RON = 78 mΩ |
| Isolation Rating | 1.5 kVRMS for 1 minute (UL 1577 pending), CMTI > 100 kV/µs |
| Supply Ranges | VDD1: 2.25–5.5 V; VDD2: 9–32 V - enables direct MCU interfacing and industrial bus compatibility |
| Fault Reporting | Active-low FLT pin indicates any detected fault; VDD2_WRN pin signals low switch supply (9–18 V warning range) |
| Protection Features | Overcurrent, overtemperature, VDD1/VDD2 undervoltage lockout - shuts down outputs safely without external circuitry |
| Operating Temp | –40°C to +125°C - qualified for harsh industrial environments |
Pinout & Package
SI83402BCA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), rated for surface-mount reflow assembly and high-power dissipation in dense industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface; accepts 2.25–5.5 V; internal UVLO at ~2.05 V |
| GND1 | Logic ground reference | Reference for VDD1 and all logic-level inputs/outputs |
| OE | Asynchronous output enable | Active-high; disables all channels when low - enables fast system-level shutdown |
| A1, A2 | Parallel input controls | Direct logic-level signals controlling B1/B2 outputs; no SPI required |
| B1, B2 | High-side switch outputs | Source current to loads; rated 1.25 A continuous; integrated clamp handles demagnetization energy |
| VDD2 | Switch supply input | Powers output stage; 9–32 V range; UVLO thresholds at 9 V (NP) and 18 V (W) |
| GND2 | Power ground reference | Reference for VDD2 and B1/B2 outputs; galvanically isolated from GND1 |
| FLT | Fault indicator | Active-low open-drain output; asserts when any fault (overcurrent, overtemp, UV) is detected |
| VDD2_WRN | Switch supply warning | Active-low open-drain; asserts when VDD2 drops below 18 V but remains above 9 V |
| NC, DNC | No-connect / do-not-connect | Unbonded or reserved pins - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic RF isolation | Eliminates LED aging and CMTI limitations of optocouplers; >100 kV/µs transient immunity ensures noise resilience in motor drives |
| Dual high-side topology | Enables direct sourcing to 24 V industrial loads without external high-side drivers or bootstrap circuits |
| Integrated multi-voltage clamp | Handles unlimited inductive kickback energy (EAS) while enabling fast turn-OFF - reduces arcing in solenoid/relay coils |
| Independent supply monitoring | VDD1 and VDD2 each have dedicated UVLO detection - prevents erratic switching during brownouts |
| Fail-safe fault signaling | FLT and VDD2_WRN pins provide immediate, hardware-level visibility into system health without SPI polling |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Controller I/O |
|---|---|
Use Scenario: Driving 24 V DC solenoids and small relays in modular PLC backplanes with strict isolation and diagnostics requirements. IC Role / Device Role / Timing Role: Dual high-side switch providing galvanically isolated, current-limited load control with real-time fault reporting via FLT and VDD2_WRN pins. Use Value: Replaces discrete optocoupler + MOSFET combinations, reducing BOM count by 3× and eliminating external clamp diodes or TVS arrays. | Use Scenario: Controlling stepper motor enable lines and brake solenoids in servo drive auxiliary I/O sections where space and reliability are critical. IC Role / Device Role / Timing Role: Isolated high-side driver delivering 1.25 A per channel with <10 µs propagation delay and automatic overtemperature shutdown. Use Value: Enables single-chip implementation of dual safety-critical outputs with built-in diagnostics - eliminates need for external current sense or thermal monitoring. |
| Smart Solid-State Relay Replacement | Industrial Data Acquisition Front-End |
Use Scenario: Upgrading electromechanical relays in HVAC control panels to solid-state equivalents with longer lifetime and silent operation. IC Role / Device Role / Timing Role: High-side switch IC providing zero-crossing–free DC switching with integrated EAS clamp and fault signaling. Use Value: Delivers 100× longer lifetime than mechanical relays and eliminates contact bounce, while FLT pin enables predictive maintenance alerts. | Use Scenario: Conditioning and isolating digital control signals in distributed I/O nodes connected to analog sensor subsystems. IC Role / Device Role / Timing Role: Isolated interface between microcontroller GPIO and field-side actuators, with independent VDD1/VDD2 domains preventing ground loop coupling. Use Value: Provides 1.5 kVRMS isolation barrier and >100 kV/µs CMTI - maintains signal integrity in noisy factory-floor environments with variable-frequency drives. |
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 | No VDD2_WRN pin; FLT only; same 2-channel high-side, 1.25 A, 78 mΩ specs | Lacks switch supply warning capability - suitable where only global fault indication is needed | Select when VDD2 monitoring is handled externally or unnecessary |
| SI83402BCA-IF | Same functionality and pinout; tape-and-reel packaging omitted (no "R" suffix) | Identical electrical and thermal performance; differs only in packaging format | Select for manual prototyping or low-volume builds requiring cut tape |
Compared with SI83402BCA-IFR, SI83402BBA-IFR removes VDD2_WRN functionality for simpler diagnostics, while SI83402BCA-IF offers identical silicon in non-reel packaging - both retain the core 2-channel high-side isolation, 1.25 A rating, and fail-safe FLT signaling essential for industrial control.
Availability
SI83402BCA-IFR 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 lifecycle support, and certified isolation performance.
Supply support for SI83402BCA-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 U.S.-based semiconductor company specializing in analog and mixed-signal connectivity solutions for infrastructure, automotive, and industrial markets.
The Si834x product line was developed to replace optocoupler-based relay drivers with robust, high-CMTI, digitally intelligent isolated switches - targeting safety-critical industrial I/O where reliability, diagnostics, and long-term supply stability are mandatory.
FAQ
What is the maximum continuous output current per channel for the SI83402BCA-IFR?
The SI83402BCA-IFR delivers 1.25 A continuous current per channel at 25°C ambient temperature, with an ON-resistance of 78 mΩ. Derating applies above 25°C per the thermal characteristics in the datasheet, and peak inrush current capability is not supported on this variant (unlike "A"-suffix parts).
Does the SI83402BCA-IFR support SPI communication?
No, the SI83402BCA-IFR uses a parallel-only interface with dedicated A1/A2 input pins and OE control - it does not include SPI functionality. SPI capability is present only on "D"- and "F"-suffix variants like SI83402BDA-IFR or SI83402BFA-IFR.
What fault conditions trigger the FLT pin on the SI83402BCA-IFR?
The FLT pin on the SI83402BCA-IFR asserts low for overcurrent, overtemperature, VDD1 undervoltage, and VDD2 undervoltage faults. It remains asserted until all faults clear and the Clear Fault Delay (tCFD) expires - no software reset is required.
What is the purpose of the VDD2_WRN pin on the SI83402BCA-IFR?
The VDD2_WRN pin on the SI83402BCA-IFR is an active-low open-drain indicator that asserts when the switch supply (VDD2) falls within the 9–18 V warning range - signaling marginal but still operational voltage, distinct from full undervoltage shutdown below 9 V.
Is the SI83402BCA-IFR RoHS compliant and halogen-free?
Yes, the SI83402BCA-IFR is RoHS compliant and halogen-free per Skyworks' material declarations. It meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for lead-free reflow soldering per IPC/JEDEC J-STD-020.
SI83402BCA-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):
- 3.5µs, 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)
SI83402BCA-IFR FAQ
1.How can I place an order for SI83402BCA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83402BCA-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 SI83402BCA-IFR reliable?
The price and inventory of SI83402BCA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83402BCA-IFR is usually 5 days.
3.What payment methods are accepted for SI83402BCA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83402BCA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83402BCA-IFR?
SI83402BCA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83402BCA-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 SI83402BCA-IFR?
For technical support, including SI83402BCA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83402BCA-IFR requirements.
6.How does Aetrix verify that SI83402BCA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83402BCA-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 SI83402BCA-IFR meets industry standards.
7.What is the process for return or replacement of SI83402BCA-IFR?
All SI83402BCA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83402BCA-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 SI83402BCA-IFR part is unused and in its original packaging.
Return procedure for SI83402BCA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83402BCA-IFR Tags
-
ISO1212DBQR
Texas Instruments
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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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