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Skyworks Solutions Inc. SI8382PF-IUR
- Part No.:
- SI8382PF-IUR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
SI8382PF-IUR.pdf
- Description:
- DGTL ISO 2500VRMS 8CH GP 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
SI8382PF-IUR from Skyworks Solutions is an 8-channel bipolar digital field input isolator for industrial PLC and I/O module applications. It supports 24 V sinking or sourcing inputs with integrated 2.5 kVRMS CMOS isolation, no VDD required on the field side, 10 ms low-pass debounce filtering per low-speed channel, and 2.25–5.5 V output-side VDD operation.
For engineers reviewing the SI8382PF-IUR datasheet, SI8382PF-IUR pinout, SI8382PF-IUR application, or SI8382PF-IUR equivalent, this device delivers certified safety isolation, configurable noise immunity for 24 V industrial sensors, and drop-in compatibility with legacy optocoupler-based input stages in distributed control systems.
Technical Context
The SI8382PF-IUR implements Skyworks' CMOS-based capacitive isolation with RF-modulated OOK signaling across a reinforced barrier, enabling bipolar (sinking/sourcing) 24 V input operation without field-side power. Each of its two high-speed channels (BH1–BH2) bypasses filtering for <1 µs propagation delay, while six low-speed channels (B1–B6) integrate fixed 10 ms low-pass debounce filters.
Its input stage uses a diode-bridge LED emulator architecture to convert bidirectional current flow into modulated RF signals; outputs are flow-through CMOS buffers compliant with 2.25 V logic thresholds. The device meets IEC 61131-2 Type 1/2/3 switch specifications using external resistor networks and requires no SPI configuration-unlike serial variants such as SI8380S.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS withstand voltage - enables safe separation between hazardous 24 V field wiring and SELV controller-side circuitry per UL 1577, VDE 0884-10, and IEC 62368-1. |
| Input Configuration | Bipolar sinking/sourcing - accepts 24 V DC field signals in either direction without polarity constraints or external power on field side. |
| Debounce Filter | Fixed 10 ms low-pass filter on all six low-speed channels - suppresses contact bounce and EMI transients in mechanical switch or relay inputs. |
| Propagation Delay | Typ. 1.2 µs (high-speed), 10.1 µs (low-speed) - ensures deterministic timing for real-time PLC scan cycles and motion control feedback loops. |
| Common-Mode Transient Immunity | 300 kV/µs - maintains signal integrity during fast-switching noise events common in motor drives and solenoid actuation environments. |
| Supply Voltage Range | 2.25–5.5 V VDD - interoperates with modern low-voltage microcontrollers and FPGA I/O banks without level-shifting. |
| Operating Temperature | –40 °C to +125 °C - supports deployment in uncontrolled industrial cabinets and outdoor enclosures. |
Pinout & Package
SI8382PF-IUR is housed in a RoHS-compliant QSOP-20 package (5.3 mm × 10.2 mm, 0.65 mm pitch) with creepage/clearance ≥8.0 mm across the internal isolation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Field-side input terminals | Eight isolated bipolar inputs; A1–A2 are high-speed (BH1–BH2), A3–A8 are low-speed (B1–B6) with fixed 10 ms filtering. |
| COM | Field-side common reference | Shared return path for all eight input channels; connects to 24 V supply ground or source depending on sink/source mode. |
| B1–B8 | Controller-side output terminals | Flow-through CMOS outputs; B1–B6 reflect filtered low-speed states, B7–B8 reflect unfiltered high-speed states. |
| VDD | Output-side power supply | Supplies 2.25–5.5 V to output drivers and internal logic; no field-side VDD required. |
| GND | Output-side ground reference | Return path for VDD and all Bx outputs; galvanically isolated from COM. |
| NC | No-connect pins | Pins 11, 12, 13, 14 - unused; must remain unconnected per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar 24 V interface | Eliminates need for separate sink/source input circuits or external biasing - reduces BOM count and PCB area in modular I/O designs. |
| Integrated 2.5 kVRMS isolation | Replaces discrete optocouplers and isolated power supplies - simplifies certification to UL, VDE, and CQC safety standards. |
| Fixed 10 ms debounce filtering | Guarantees clean digital transitions from noisy mechanical contacts without firmware intervention or external RC networks. |
| High CMTI (300 kV/µs) | Prevents false triggering during rapid bus transients in VFDs, servo amplifiers, and industrial inverters. |
| Wide VDD range (2.25–5.5 V) | Direct interfacing with 2.5 V, 3.3 V, and 5 V microcontrollers - avoids level translators in mixed-voltage systems. |
| IEC 61131-2 compliance | Validated for Type 1, 2, and 3 switch behavior using standard resistor networks - accelerates PLC hardware qualification. |
Applications
| Programmable Logic Controllers (PLCs) | Industrial I/O Modules |
|---|---|
Use Scenario: Digital input card in a DIN-rail mounted PLC rack accepting 24 V sensor signals from limit switches, photoelectric sensors, and pushbuttons. IC Role / Device Role / Timing Role: Isolated field-to-controller signal translator providing certified safety barrier and noise-immune digital state capture. Use Value: Enables direct connection of unconditioned 24 V industrial sensors while meeting UL 508 and IEC 61131-2 requirements without external filtering components. | Use Scenario: Compact remote I/O node with eight digital inputs deployed alongside motor drives and pneumatic valves in a packaging line. IC Role / Device Role / Timing Role: Bipolar input conditioner delivering deterministic 10.1 µs max propagation delay for synchronized machine-state monitoring. Use Value: Guarantees reliable detection of fast-acting solenoid valve status changes amid high dv/dt noise from adjacent AC contactors. |
| Distributed Control Systems (DCS) | Motion Control Systems |
Use Scenario: Field termination unit in a refinery DCS collecting status from flame detectors, emergency stop circuits, and level switches across hazardous zones. IC Role / Device Role / Timing Role: Safety-rated isolation barrier ensuring functional integrity between Zone 2 field devices and control room logic. Use Value: Meets SIL-2 capability requirements per IEC 61508 when used with appropriate system-level diagnostics and redundancy. | Use Scenario: Input interface in a CNC machine's axis control cabinet receiving homing signals, limit switch triggers, and encoder zero-mark pulses. IC Role / Device Role / Timing Role: High-CMTI digital input receiver preserving edge timing accuracy for precise position capture during high-acceleration moves. Use Value: Prevents missed or spurious homing events caused by coupling from PWM-driven spindle inverters operating at 16 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar digital field input applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8384PF-IUR | Four high-speed channels (vs. two), same 10 ms low-pass filtering on remaining four low-speed channels. | Supports higher channel density where multiple fast-response inputs (e.g., encoder index pulses) are required alongside debounced switch inputs. | Select when needing >2 unfiltered inputs without adding second SI8382PF-IUR; shares identical pinout and footprint. |
| SI8382P-IU | No debounce filtering (0 ms delay); otherwise identical channel count, isolation, and electrical specs. | Suitable for applications requiring minimal propagation delay (<1.2 µs) on all channels, such as high-frequency pulse counting or real-time fault detection. | Choose when timing-critical inputs dominate and external software/hardware debouncing is already implemented. |
Compared with SI8384PF-IUR, SI8382PF-IUR offers lower channel count but reduced cost and board space for mid-density I/O; compared with SI8382P-IU, it trades 8.9 µs added delay for guaranteed hardware-level noise rejection on six channels-critical for reliability in electrically harsh factory floors.
Availability
SI8382PF-IUR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial I/O modules, and distributed control systems requiring stable component supply, long-term lifecycle assurance, and certified safety isolation.
Supply support for SI8382PF-IUR 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 Si838x product line was designed specifically to replace aging optocoupler-based digital input stages in industrial automation equipment with robust, high-reliability CMOS isolation technology.
FAQ
What is the maximum number of SI8382PF-IUR devices that can be cascaded on a single controller interface?
SI8382PF-IUR does not support daisy-chaining-it features a parallel output interface only. Unlike the SI8380S serial variant, SI8382PF-IUR requires one dedicated controller I/O pin per output (B1–B8). For multi-device configurations, use GPIO expanders or microcontroller port multiplexing. SI8382PF-IUR itself has no built-in serialization or addressability.
Does SI8382PF-IUR require external components to meet IEC 61131-2 Type 2 switch specifications?
Yes-SI8382PF-IUR requires external resistor networks on the field side to configure input impedance and voltage thresholds per IEC 61131-2 Type 2. The datasheet provides validated R1/R2 values (e.g., 2.2 kΩ + 1.2 kΩ) for 24 V operation. No external filtering is needed for the 10 ms debounce, as it is fully integrated and factory-configured in SI8382PF-IUR.
Can SI8382PF-IUR accept 12 V or 48 V field inputs, or is it limited to 24 V?
SI8382PF-IUR supports bipolar inputs from 12 V to 48 V DC via external resistor network adjustment. Its LED emulator input stage operates over 10–30 mA input current; changing the series resistor scales the voltage range while maintaining compliance with IF(ON) = 1 mA typ. Designers must recalculate R1/R2 per Table 4.1 in the datasheet to preserve noise margin and switching thresholds.
What is the undervoltage lockout (UVLO) threshold for SI8382PF-IUR, and how does it affect output behavior?
SI8382PF-IUR asserts UVLO when VDD falls below 1.95 V (typ.) and releases it at 2.1 V (typ.). During UVLO, outputs enter an undetermined state-not high-impedance, but electrically undefined within absolute maximum ratings. To ensure safe default states, Skyworks recommends 100 kΩ pull-up or pull-down resistors on each Bx output, as specified in Section 3.4.2 of the SI8382PF-IUR datasheet.
How does the 10 ms debounce filter in SI8382PF-IUR differ from software-based debouncing in a PLC CPU?
The 10 ms debounce in SI8382PF-IUR is a hardware low-pass filter applied before signal digitization, rejecting sub-100 Hz noise and contact bounce at the physical layer. Unlike CPU-based debouncing-which introduces variable latency due to scan cycle jitter and task scheduling-this fixed, deterministic delay ensures consistent timing across all channels and eliminates firmware overhead, critical for hard real-time motion control sequences.
SI8382PF-IUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 8
- Inputs - Side 1/Side 2:
- 8/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- -
- Data Rate:
- 2Mbps
- Propagation Delay tpLH / tpHL (Max):
- -
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 3.9ns, 3.7ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QSOP
SI8382PF-IUR FAQ
1.How can I place an order for SI8382PF-IUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8382PF-IUR 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 SI8382PF-IUR reliable?
The price and inventory of SI8382PF-IUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8382PF-IUR is usually 5 days.
3.What payment methods are accepted for SI8382PF-IUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8382PF-IUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8382PF-IUR?
SI8382PF-IUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8382PF-IUR 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 SI8382PF-IUR?
For technical support, including SI8382PF-IUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8382PF-IUR requirements.
6.How does Aetrix verify that SI8382PF-IUR is sourced from the original manufacturer or authorized distributors?
All SI8382PF-IUR 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 SI8382PF-IUR meets industry standards.
7.What is the process for return or replacement of SI8382PF-IUR?
All SI8382PF-IUR units undergo pre-shipment inspection (PSI). If there is an issue with SI8382PF-IUR, 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 SI8382PF-IUR part is unused and in its original packaging.
Return procedure for SI8382PF-IUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8382PF-IUR 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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