Si838x Data SheetBipolar Digital Field Inputs for PLCs and Industrial I/O ModulesThe Si838x provides eight input channels ideal for 24 V digital logic commonly usedfor industrial applications. These channels can either sink or source current and featureintegrated safety rated isolation. In combination with a few external components, thisprovides compliance to IEC 61131-2 switch types 1, 2, or 3. The input interface is basedon Skyworks' ground-breaking CMOS based LED emulator technology which enablesthe bipolar capability (sinking or sourcing inputs) with no VDD required on the fieldside. The output interface from the Si838x device allows for low power operation with2.25 V compliance. These products utilize Skyworks' proprietary CMOS-based isolationtechnology, supporting up to 2.5 kVRMS withstand voltage. This technology enables highCMTI (up to 300 kV/μs), lower propagation delays and channel skew, reduced variationwith temperature and age, and tighter part-to-part matching. The Si838x offers longerservice life and dramatically higher reliability compared to opto-coupled input solutions.Product options include parallel or serialized outputs. Parallel outputs can be purchasedwith built-in, low-pass filters for improved noise immunity, reduced design complexityand cost. Cascading a total of 128 channels (16x Si838x) with a single MCU interface ispossible with the Si8380S serial output option. The Si8380S also unlocks the ability toconfigure each channel with unique filtering behavior.Applications:• Programmable logic controllers• Industrial data acquisition• Distributed control systems• CNC machines• I/O modules• Motion control systemsSafety Regulatory Approvals:• UL 1577 recognized• Up to 2500 VRMS for one minute• CSA component notice 5A approval• IEC 60950-1• IEC 62368-1• VDE certification conformity• VDE 0884-10• CQC certification approval• GB4943.1KEY FEATURES• Bipolar digital interface with 24 V sinking orsourcing inputs• Eight total inputs in one package• High data rates of up to 2 Mbps• Safety rated integrated isolation of 2.5kVRMS• Low input current of 1 mA typ• No VDD required on field side• High electromagnetic immunity• Selectable debounce filter times of up to100 ms• Configurable debounce filter modesavailable with SPI interface option• Transient immunity up to 300 kV/μs• Flow-through output configuration witheight outputs• Option for SPI interface with daisy-chaincapability• Wide 2.25 to 5.5 V VDD operation• Wide operating temperature range• –40 to 125 °C• Compliant to IEC 61131-2• Type 1, 2, 3• RoHS-compliant packages• QSOP-20A2A3A4A7A8A5A61234569101918171615A1COMCOMB1B2B3B4VDDGNDB7B878B5B6Si8380P1412112013eeeeeeee1234569101918171615A1A2A3A4COMCOMA7A8MISOMOSINSSSCLKVDDGNDNCNC78A5A6MOSI_THRUNCSi8380S1412112013SPIeeeeeeeeSkyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com1Rev. 1.0 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 3, 20211
