Si838x Isolated Multi-Channel Input Devices for PLC Applications

The Silicon Labs Si838x offers longer service life and dramatically higher reliability compared to competing opto-coupled input solutions.   The device provides eight channels of 24 V digital field interface in a single compact QSOP package to either sinking or sourcing inputs with integrated safety rated isolation. In combination with a few external components, this structure provides compliance to IEC 61131-2 switch types 1, 2, or 3. The input interface is built on our ground-breaking CMOS-based LED emulator technology, which enables the bipolar capability (sinking or sourcing inputs) to operate without a power supply required on the field side. The output interface to the controller allows for low power operation with 2.5 V operation capability. 

These devices utilize the Silicon Labs proprietary silicon isolation technology and support up to 2.5 kVrms withstand voltage. This technology enables high speed capability of 1 MHz (2 Mbps) for servo motor control, a high noise immunity of 25 kV/µs, lower prop delays and skew, reduced variation with temperature and age and tighter part-to-part matching. Product options include parallel or serialized outputs. Cascading capability for a total of 128 channels (16x Si838x) is possible with the serial output option. Other options include a de-bounce filter, either pre-programmed (in the parallel configuration) or programmable (on the serial out configuration).  

Webinar: Integrating Speed and Flexibility Isolating Industrial Control

In this webinar we explore how to integrate speed and design flexibility into your industrial automation applications.

Features

  • 8x bipolar inputs, interface to 24 V digital field inputs
  • High speed channels of 2 Mbps for servo motor control
  • Integrated 2.5 kVrms safety rated isolation
  • 2.5 - 5.5 V VDD capability for low power controller interface
  • Serial (SPI) interface with controller
  • Capable of 16x Si838x daisy chain for 128 channels
  • IEC 61131-2 compliant, Type 1, 2, 3
  • De-bounce filter options


Si838x Product Matrix

Status
Devices
Part Number Data Sheet Evaluation Kit Max Propagation Delay Isolation Rating (kVrms) 10 kV Surge Enable Control Output Type Package Type Output Supply (V) Temperature Range (°C) Channel Type Unidirectional Channels Forward Channels Reverse Channels Max Data Rate (bps) Integrated Pull-Up AEC-Q100 Input Type
Si838xISO-Kit 4 µs 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 200 No Yes LED Emulator
Si838xISO-Kit 4 µs 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 200 No Yes LED Emulator
Si838xISO-Kit 4 µs 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 200 No Yes LED Emulator
Si838xISO-Kit 4 µs 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 200 No Yes LED Emulator
Si838xISO-Kit 4 µs 2.5 No No Serial QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 200 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
Si838xISO-Kit 4 µs/100 ns 2.5 No No Parallel QSOP20 2.25 5.5 -40 125 Unidirectional 8 8 0 2000 No Yes LED Emulator
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