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Skyworks Solutions Inc. SI8340XEN1-IF
- Part No.:
- SI8340XEN1-IF
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI8340XEN1-IF.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
SI8340XEN1-IF from Skyworks Solutions is a 4-channel isolated high-side smart switch IC with galvanic CMOS isolation, 0.7 A continuous current per channel (155 mΩ RON), 9–32 V switch supply, and 2.25–5.5 V logic supply - designed for driving solenoids, relays, and lamps in industrial PLC I/O modules.
For engineers reviewing the SI8340XEN1-IF datasheet, SI8340XEN1-IF pinout, SI8340XEN1-IF application, or SI8340XEN1-IF equivalent, key selection considerations include its 4-channel high-side sourcing architecture, SPI+parallel dual-interface support, eight integrated diagnostics, 1.5 kVRMS safety isolation, and inrush current mode (8 A/20 ms) for lamp loads.
Technical Context
The SI8340XEN1-IF implements four independent high-side switches using RF-modulated CMOS isolation across a single die, each with dedicated voltage/current/temperature sensing and a multi-voltage smart output clamp for unlimited EAS handling and fast turn-OFF. Its dual-control interface supports both parallel input (A1–A4, OE) and full SPI (MOSI/MISO/SCLK/NSS) for configuration and diagnostics.
Switch operation is governed by independent fault detection including overcurrent (with Inrush Current Mode), overtemperature, open-circuit, VDD2 undervoltage warning (VDD2_WRN), and communication error - all reported via SPI status registers or active-low open-drain indicator pins (FLT, LED1–LED4). Isolation barrier transient immunity exceeds 100 kV/µs, and device complies with IEC 61131-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 4 independent high-side sourcing switches |
| Continuous Current | 0.7 A per channel at 25°C (RON = 155 mΩ) |
| Switch Supply Range | 9 V–32 V - compatible with standard industrial 24 V DC systems |
| Logic Supply Range | 2.25 V–5.5 V - interfaces directly with low-power MCUs and FPGAs |
| Isolation Rating | 1.5 kVRMS for 1 minute (UL 1577 pending), CQC GB4943.1 & CSA 62368-1 certified |
| Inrush Current Mode | 8 A for 20 ms - enables reliable cold-start of incandescent lamps without contact welding |
| CMTI | >100 kV/µs - ensures robust operation in noisy industrial environments with fast transients |
| Operating Temperature | −40°C to +125°C - qualified for extended industrial ambient conditions |
Pinout & Package
SI8340XEN1-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 in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Provides power to digital interface (2.25–5.5 V); powers internal logic and isolation transmitter |
| VDD2 | Switch supply input | High-side driver rail (9–32 V); powers all four output channels and protection circuitry |
| GND1 / GND2 | Logic / power ground | Galvanically separated grounds - mandatory physical separation on PCB to maintain isolation integrity |
| A1–A4 | Parallel input control | Active-high logic inputs controlling respective high-side outputs B1–B4 when OE is asserted |
| OE | Output enable | Asynchronous active-high enable for all four channels; overrides SPI and parallel control during fault conditions |
| B1–B4 | High-side switch outputs | Source-current outputs (0.7 A max) - connect load between Bn and system ground (low-side return) |
| FLT | Fault indicator | Active-low open-drain output asserting when any diagnostic fault (overcurrent, overtemp, etc.) is detected |
| LED1–LED4 | Channel status indicators | Active-low open-drain outputs reflecting real-time ON/OFF state of B1–B4 for panel or HMI feedback |
| VDD2_WRN | VDD2 undervoltage warning | Active-low open-drain signal asserting when VDD2 drops below 18 V threshold (warning range: 9–18 V) |
| MOSI / MISO / SCLK / NSS | SPI interface | Full-duplex serial interface for reading diagnostics, configuring protection thresholds, and enabling/disabling channels |
Key Features
| Feature | Design Value |
|---|---|
| RF-based CMOS isolation | Eliminates LED aging and CMTI limitations of optocouplers; enables >100 kV/µs transient immunity |
| Smart output clamp | Multi-voltage clamping handles unlimited demagnetization energy (EAS) while enabling fast inductor turn-OFF |
| Inrush Current Mode | Delivers 8 A peak for 20 ms to safely energize cold lamp filaments without exceeding thermal SOA limits |
| Eight diagnostics via SPI | Reports VDD1/VDD2 status, overcurrent, overtemperature, open-load, communication errors - no external monitoring required |
| Dual interface (SPI + parallel) | Enables legacy optocoupler replacement (parallel-only mode) or advanced diagnostics (full SPI mode) in same footprint |
| Asynchronous output disable | OE pin forces immediate shutdown of all channels independent of SPI or logic state - critical for emergency stop circuits |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Data Acquisition System |
|---|---|
|
Use Scenario: Driving 24 V DC solenoid valves and indicator lamps in modular PLC backplanes with space-constrained I/O slots. IC Role / Device Role / Timing Role: High-side switch providing isolated, current-limited, fault-monitored load control with <10 µs update rate. Use Value: Replaces discrete optocoupler + MOSFET + protection IC solutions, reducing BOM count by 60% and enabling full diagnostics via SPI bus. |
Use Scenario: Conditioning and isolating sensor actuation signals in distributed I/O nodes connected to central controllers via RS-485 or EtherCAT. IC Role / Device Role / Timing Role: Galvanically isolated high-side driver for resistive/inductive field devices with integrated open-circuit detection. Use Value: Eliminates need for external current-sense amplifiers and fault comparators - open-load warning reduces false alarms during cable disconnect events. |
| Motion Controller Axis Interface | Smart Solid-State Relay Replacement |
|
Use Scenario: Controlling brake coils and limit-switch actuators in servo drive cabinets where EMI immunity and thermal reliability are critical. IC Role / Device Role / Timing Role: Four-channel isolated switch with overtemperature constraint protection and fast turn-OFF for precise motion sequencing. Use Value: Smart clamp prevents arcing during rapid brake coil de-energization, extending mechanical life and reducing electromagnetic emissions. |
Use Scenario: Upgrading electromechanical relays in HVAC control panels and building automation systems to solid-state with built-in health monitoring. IC Role / Device Role / Timing Role: High-reliability, maintenance-free switching element with LED status outputs and FLT pin for predictive maintenance alerts. Use Value: Enables remote fault logging via SPI - eliminates manual visual inspection of relay LEDs and reduces service call frequency by 40%. |
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 | Same 4-channel high-side architecture, identical pinout and package, but includes Inrush Current Mode (8 A/20 ms) | Preferred for lamp and filament load applications requiring cold-start surge capability | Select SI83404AAA-IF if lamp driving is required; SI8340XEN1-IF lacks inrush mode per datasheet Table 1 |
| SI83408AFA-IF | Same 4-channel high-side function, adds MOSI_THRU pin for daisy-chained SPI topology and removes VDD2_WRN | Optimized for multi-device SPI networks where VDD2 warning is managed centrally | Choose SI83408AFA-IF for scalable I/O expansion; SI8340XEN1-IF retains VDD2_WRN for local supply monitoring |
Compared with SI83404AAA-IF and SI83408AFA-IF, the SI8340XEN1-IF provides baseline 4-channel high-side switching with full diagnostics and VDD2 warning but excludes inrush mode and MOSI_THRU - making it ideal for general-purpose solenoid/relay control where surge current is not required and point-to-point SPI suffices.
Availability
SI8340XEN1-IF is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controllers, and smart solid-state relay designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SI8340XEN1-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 developed specifically for industrial automation applications requiring high-reliability, galvanically isolated, intelligent switching with integrated diagnostics - replacing legacy optocoupler-based relay drivers.
FAQ
What is the maximum continuous current rating per channel for the SI8340XEN1-IF?
The SI8340XEN1-IF delivers 0.7 A continuous current per channel at 25°C ambient, with an RON of 155 mΩ. Derating applies above 25°C per the thermal characteristics in Section 5.2 of the datasheet; at 100°C case temperature, rated current drops to approximately 0.45 A per channel to maintain safe SOA operation.
Does the SI8340XEN1-IF support inrush current mode for lamp loads?
No, the SI8340XEN1-IF does not include Inrush Current Mode. Per Table 1 of the Si834x Ordering Guide, only variants ending in "AAA" (e.g., SI83404AAA-IF) or "ADA" support 8 A for 20 ms inrush capability. SI8340XEN1-IF is configured for standard continuous switching without enhanced surge handling.
What isolation certifications apply to the SI8340XEN1-IF?
The SI8340XEN1-IF carries pending UL 1577 recognition (1500 VRMS/1 min), CSA certification under 62368-1, and CQC approval to GB4943.1. All certifications pertain to its 1.5 kVRMS reinforced isolation barrier, which meets IEC 61131-2 requirements for industrial programmable controllers.
Can the SI8340XEN1-IF be used as a direct replacement for optocoupler-based relay drivers?
Yes - the SI8340XEN1-IF supports parallel interface mode (A1–A4 + OE) with identical timing behavior and pin-compatible control logic, enabling drop-in replacement of legacy optocoupler + discrete MOSFET designs. No firmware changes are needed for basic ON/OFF control, though diagnostics require SPI integration.
How are fault conditions reported on the SI8340XEN1-IF?
Faults on the SI8340XEN1-IF are reported through two concurrent paths: (1) the active-low open-drain FLT pin asserts for any detected fault (overcurrent, overtemperature, VDD2 undervoltage, etc.), and (2) eight distinct diagnostic flags are accessible via SPI status registers - including individual channel open-circuit, communication error, and supply warnings.
SI8340XEN1-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:
- -
- 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)
SI8340XEN1-IF FAQ
1.How can I place an order for SI8340XEN1-IF through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8340XEN1-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 SI8340XEN1-IF reliable?
The price and inventory of SI8340XEN1-IF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8340XEN1-IF is usually 5 days.
3.What payment methods are accepted for SI8340XEN1-IF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8340XEN1-IF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8340XEN1-IF?
SI8340XEN1-IF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8340XEN1-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 SI8340XEN1-IF?
For technical support, including SI8340XEN1-IF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8340XEN1-IF requirements.
6.How does Aetrix verify that SI8340XEN1-IF is sourced from the original manufacturer or authorized distributors?
All SI8340XEN1-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 SI8340XEN1-IF meets industry standards.
7.What is the process for return or replacement of SI8340XEN1-IF?
All SI8340XEN1-IF units undergo pre-shipment inspection (PSI). If there is an issue with SI8340XEN1-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 SI8340XEN1-IF part is unused and in its original packaging.
Return procedure for SI8340XEN1-IF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8340XEN1-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.
-
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
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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