AS-Interface Spec. V3.0 Compliant Universal AS-i IC

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 Availability
SAP51D-A-G1-T Active PSG20 SOIC 20 -25 to 85°C Tube Availability
SAP51D-B-G1-R Active PSG16 SOIC 16 -25 to 85°C Reel Availability
SAP5SD-A-G1-R Active PSG20 SOIC 20 -25 to 85°C Reel Availability
SAP5SD-A-G1-T Active PSG20 SOIC 20 -25 to 85°C Tube Availability
SAP5SD-B-G1-R Active PSG16 SOIC 16 -25 to 85°C Reel Availability
SAP5SD-B-G1-T Active PSG16 SOIC 16 -25 to 85°C Tube Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
SAP5 Datasheet - Datasheet PDF 867 KB Jan 27, 2016
AS-Interface Evaluation Tools Feature Sheet - Short Form Datasheet PDF 76 KB Apr 20, 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