Integrated Circuits

ASi-3 ASi-5


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 interconnection 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 environ-ments 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

Certified by
AS-international Association
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