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. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
Active SOIC 20 -25 to 85°C Reel
Active SOIC 20 -25 to 85°C Tube
Active SOIC 16 -25 to 85°C Reel
Active SOIC 20 -25 to 85°C Reel
Active SOIC 20 -25 to 85°C Tube
Active SOIC 16 -25 to 85°C Reel
Active SOIC 16 -25 to 85°C Tube

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
AS-Interface Evaluation Tools Feature Sheet Short Form Datasheet PDF 174 KB
SAP5 Short-form Datasheet Short Form Datasheet PDF 192 KB
SAP5 Datasheet Datasheet PDF 931 KB
User Guides & Manuals
IDT CAD Altium Libraries for AID Products Rev 20160819 Guide ZIP 1.20 MB
AS-Interface Programmer V2.0 USB User Manual Manual PDF 1.50 MB
SAP5 Application Note - EEPROM Programming Manual PDF 279 KB
Application Notes & White Papers
AS-Interface Application Note - ASI4U and SAP5 Master Mode Application Note PDF 644 KB
AS-I Programmer Software Rev. 2.51 Software ZIP 12.39 MB
AS-I Family Application Note - Electrical Inductor Schematic PDF 107 KB
SAP5 - Release Notes for Migration to Revision D Silicon Technical Brief PDF 343 KB

Boards & Kits

Part Number Title Type Company
SAP5KIT Evaluation Board for SAP5