The SAP5S/SAP51 is a next-generation CMOS integrated circuit for AS-Interface networks. This low-level field bus AS-i (Actuator Sensor Interface) was designed for easy, safe, and cost-effective inter-connection of sensors, actuators, and switches. It transports both power and data over the same two-wire unshielded cable.

The SAP5S/SAP51 is used as part of a master or slave node and functions as an interface to the physical bus. It provides the power supply, physical data transfer, and communication protocol handling. The SAP5S/SAP51 is fully compliant with the AS Interface Complete Specification V3.0. It is function and pin compatible with the SAP4.1 (AS2702).The SAP5S/SAP51 can be programmed by the user to operate in Standard Slave Mode, Safety Mode (SAP5S only), or Master Mode. The special AS i Safety Mode (SAP5S only) assures short response times regarding security-related events.

All configuration data are stored in an internal EEPROM that can be easily programmed by a stationary or handheld programming device. The SAP5S/SAP51 is optimized for harsh environments by its special burst protection circuitry and excellent electromagnetic compatibility.


  • Compliant with the AS-Interface Complete Specification V3.0
  • Universal application: slaves, masters, repeaters
  • Integrated safety code generator (SAP5S only)
  • On-chip electronic inductor: 55mA current drive capability
  • Two LED outputs to support all AS-Interface Complete Specification V3.0 status indication modes
  • User programmable to operation in Standard Slave Mode, Safety Mode, or Master Mode
  • Supports 5.33 and 16 MHz crystals by automatic frequency detection
  • Data pre-processing functions
  • Clock and communication watchdogs for high system security

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
SAP51D-A-G1-R Active PSG20 SOIC 20 -25 to 85°C Reel
SAP51D-A-G1-T Active PSG20 SOIC 20 -25 to 85°C Tube
SAP51D-B-G1-R Active PSG16 SOIC 16 -25 to 85°C Reel
SAP5SD-A-G1-R Active PSG20 SOIC 20 -25 to 85°C Reel
SAP5SD-A-G1-T Active PSG20 SOIC 20 -25 to 85°C Tube
SAP5SD-B-G1-R Active PSG16 SOIC 16 -25 to 85°C Reel
SAP5SD-B-G1-T Active PSG16 SOIC 16 -25 to 85°C Tube

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
AS-Interface Evaluation Tools Feature Sheet Short Form Datasheet PDF 76 KB Apr 20, 2016
SAP5 Datasheet Datasheet PDF 867 KB Jan 27, 2016
SAP5 Short-form Datasheet Short Form Datasheet PDF 80 KB Jan 27, 2016
User Guides & Manuals
AS-Interface Programmer V2.0 USB User Manual Manual PDF 1.29 MB Aug 3, 2016
SAP5 Application Note - EEPROM Programming Manual PDF 154 KB Apr 19, 2016
Application Notes & White Papers
AS-Interface Application Note - ASI4U and SAP5 Master Mode Application Note PDF 490 KB Apr 19, 2016
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 18, 2016
AS-I Family Application Note - Electrical Inductor Schematic PDF 107 KB Apr 30, 2016
SAP5 - Release Notes for Migration to Revision D Silicon Technical Brief PDF 228 KB Apr 20, 2016

Software & Tools

Title Other Languages Type Format File Size Date
AS-I Programmer Software Rev. 2.51 Software ZIP 12.39 MB Feb 10, 2017

Evaluation Boards

Part Number Title Sort ascending
SAP5KIT Evaluation Board for SAP5