Protected digital input termination with serialized state transfer

The SCLT3 series provides an 8-line protected digital input termination with serialized state transfer.

This device enhances the I/O module density by cutting the dissipation (78 mW per input) and reducing the count of opto-transistors.

An adjustable digital filter and an LED driver are embedded in each type 3 input section. Its 2 MHz SPI peripheral output serializes the input state transfer to the I/O module controller.

Key Features

  • 8 inputs - 8-bit SPI output
  • High side input with common ground
  • 5 V voltage regulator
  • Package: QFN 7x7 - 48L or HTSSOP-38
  • 35 V reverse polarity capable
  • Adjustable current limiters
  • LED output for visual status
  • Optional: 16-bit mode with parity check, temperature and voltage alarms
  • Daisy chain capable
  • Input digital filter with adjustable delay: 20 µs to 3 ms
  • Power dissipation: 78 mW per channel

Circuit Diagram

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Design

Technical Documentation

Product Specifications
Description Version Size
DS11042 DS11042: High speed digital input current limiter with digital filter 3.0 1 MB
DS5978 DS5978: Protected digital input termination with serialized state transfer 6.0 702 KB
Application Notes
Description Version Size
AN2846 AN2846: SCLT3-8 - guidelines for use in industrial automation applications 1.2 1 MB
AN3031 AN3031: SCLT3-8 input termination demonstration board STEVAL-IFP007V1 1.2 1 MB
Technical Notes & Articles
Description Version Size
TN1173 TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches 5.0 1 MB

Publications and Collaterals

Flyers
Description Version Size
Current-limiting terminations for automation digital inputs 2.1 400 KB
ST Protection Finder - The new app for Android and iOS 1.0 1 MB
Selection Guides
Description Version Size
Protection devices and integrated EMI filtering selection guide 2.0 743 KB
Brochures
Description Version Size
Products and Solutions for Factory Automation and Control 1.0 3 MB

Tools and Software

Development Tools
Evaluation Tools
Software Development Tools
Solution Evaluation Tools
Support & Community


Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SCLT3-8BT8-TR HTSSOP38 Tape And Reel Active 2.883 10 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
SCLT3-8BT8 HTSSOP38 Tube Active 2.883 10 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SCLT3-8BT8-TR ActiveHTSSOP38IndustrialEcopack2
SCLT3-8BT8 ActiveHTSSOP38IndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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