BiSS interface communication ASIC

(Prototype chips are available for demonstration. Final product version will be ready by Q4/2022.)

The BUS1100 device is a BiSS (bidirectional/serial/synchronous) interface communication ASIC, that implements the BiSS interface slave protocol. The device has three integrated RS-485 transceivers, a on-chip clock reference, and a SPI master.

Main features

  • BiSS-C slave protocol controller
  • Integrated SPI master controller
  • Integrated RS-485 bus transceiver
  • On-chip clock reference

Key Technical Specifications

  • Core supply: 1.2 V
  • I/O supply: 3.3 V
  • Data rate: 2 Mbit/s @ 150 m cable
  • Common mode input range: -7 V to 7 V
  • Bus termination resistor: 120 Ω
  • Input sensitivity: ±200 mV
  • Propagation delay: 50 ns

Radiation Hardness

  • TID tolerance: >100 Mrad
  • SEL: >100 MeV·cm2/mg
  • SET/SEU: >60 MeV·cm2/mg


  • Fieldbus communication
  • Industrial automation
  • Process control
  • Robotic control

This ASIC is part of a front-end rad-hard BiSS I/O module designed by MAGICS Instruments within Fusion for Energy remote handling activities (F4E-OMF-0633-01-03).