The Intersil HS-26C31RH, HS-26C31EH are quad differential line drivers designed for digital data transmission over balanced lines and meets the requirements of EIA standard RS-422. Radiation hardened CMOS processing assures low power consumption, High-Speed, and reliable operation in the most severe radiation environments. The HS-26C31RH, HS-26C31EH accept CMOS levels and converts them to RS-422 compatible outputs. These circuits uses special outputs that enable the drivers to power-down without loading down the bus. Enable and disable pins allow several devices to be connected to the same data source and addressed independently. Specifications for Rad Hard QML devices are controlled by the Defense Logistics Agency Land and Maritime (DLA). The SMD numbers listed here must be used when ordering. Detailed Electrical Specifications for these devices are contained in SMD 5962-96663.


  • Electrically screened to SMD# 5962-96663
  • QML qualified per MIL-PRF-38535 requirements
  • 1.2 Micron radiation hardened CMOS
  • Total dose up to: 300kRAD(Si)
  • Latchup free
  • EIA RS-422 compatible outputs (except for IOS)
  • CMOS inputs
  • High impedance outputs when disabled or powered down
  • Low power dissipation: 2.75mW standby (max)
  • Single 5V supply
  • Low output impedance: 10Ω or less
  • Full -55°C to +125°C military temperature range




  • Line transmitter for MIL-STD-1553 serial data bus


Design & Development