Skyworks Solutions Inc. SI8382P-IUR

Overview

SI8382P-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, provides 2.5 kVRMS safety isolation, features integrated CMOS-based capacitive isolation with 300 kV/μs CMTI, and delivers 2 Mbps data rate with no VDD required on the field side.

For engineers reviewing the SI8382P-IUR datasheet, SI8382P-IUR pinout, SI8382P-IUR application, or SI8382P-IUR equivalent, this device is selected for high-noise industrial digital input conditioning where IEC 61131-2 Type 1/2/3 compliance, long-term reliability versus optocouplers, and low-power 2.25–5.5 V output-side operation are critical design requirements.

Technical Context

The SI8382P-IUR implements eight isolated input channels using Skyworks' proprietary CMOS-based capacitive isolation barrier, eliminating LED degradation and enabling >10× service life versus optocouplers. Each channel uses a bipolar LED emulator front-end that accepts 24 V sinking or sourcing current without field-side power.

It provides two high-speed (BHx) outputs and six low-speed (Bx) outputs with fixed 100 ms low-pass debounce filtering - configured at manufacture per ordering code "PS" suffix - and operates across –40 to +125 °C with 2.25–5.5 V VDD supply.

Key Specifications

Pinout & Package

SI8382P-IUR is housed in a RoHS-compliant 20-pin QSOP package (5.3 mm × 10.2 mm, 0.65 mm pitch) with creepage/clearance ≥5.5 mm across the internal isolation barrier.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital field input isolation applications.

Compared with SI8384PS-IU, SI8382P-IUR offers fewer high-speed channels but lower channel count reduces routing complexity and cost in simpler I/O nodes; versus ADUM1402ARWZ, SI8382P-IUR integrates field-side interface, safety compliance, and filtering - cutting BOM, validation time, and board space.

Availability

SI8382P-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-lifecycle support, and certified safety isolation.

Supply support for SI8382P-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, with leadership in RF, timing, and isolation technologies.

The Si838x family was designed specifically for industrial digital input conditioning - replacing aging optocouplers with high-reliability, low-power, safety-certified CMOS isolation in PLCs, I/O modules, and motion controllers.

FAQ

What is the key functional difference between SI8382P-IUR and SI8382P-IU?

The "R" suffix in SI8382P-IUR indicates tape-and-reel packaging for automated SMT assembly, while SI8382P-IU is supplied in tube packaging. Electrically, thermally, and functionally, SI8382P-IUR is identical to SI8382P-IU - both share the same 2-channel high-speed + 6-channel low-speed output configuration, 100 ms debounce filter, 2.5 kVRMS isolation, and 20-QSOP package. The R variant is optimized for high-volume manufacturing.

Does SI8382P-IUR require external components to meet IEC 61131-2 Type 2 compliance?

Yes - SI8382P-IUR requires an external resistor network on each input channel to set threshold voltages and hysteresis per IEC 61131-2 Type 2 specifications. The datasheet (Section 4.2) provides validated resistor values (e.g., 1.2 kΩ series + 10 kΩ pull-down) for 24 V operation. No external power supply is needed on the field side, as SI8382P-IUR draws operating current directly from the input signal.

Can SI8382P-IUR be used with 12 V field inputs instead of 24 V?

Yes - SI8382P-IUR supports 12 V field inputs using modified external resistor networks. Its bipolar LED emulator input operates down to ~9 V turn-on (per Figure 3.3 I-V curve), and the datasheet confirms compatibility with "other digital voltage levels" via resistor network adjustment. For 12 V, reduce series resistance to maintain ≥1 mA input current; verify against IEC 61131-2 thresholds and perform system-level noise testing.

What is the maximum ambient temperature for continuous operation of SI8382P-IUR?

SI8382P-IUR is rated for continuous operation from –40 °C to +125 °C ambient temperature. This full industrial temperature range is validated per JEDEC JESD22-A108 and supported by its 20-QSOP package's thermal performance and internal CMOS isolation technology's stability across temperature - unlike optocouplers, which exhibit significant parameter drift above 85 °C.

How does the 100 ms debounce filter in SI8382P-IUR affect real-time response in motion control applications?

The 100 ms debounce filter in SI8382P-IUR applies only to its six low-speed outputs (B3–B8); the two high-speed outputs (B1–B2) bypass filtering with 120 ns typical propagation delay. In motion control, use B1/B2 for time-critical signals like E-stop or index pulses, and B3–B8 for slower signals like limit switches or jog buttons - preserving real-time responsiveness where needed while eliminating bounce on auxiliary inputs.