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

Product Options

Part Number Part Status Pkg. Type Carrier Type Buy Sample
Active SBDIP Tube
Active SBDIP Tube
Active SBDIP Tube
Active CFP Tray
Active CFP Tray
Active CFP Tray
Active CFP Tray
Active CFP Tray

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
HS-26C31RH, HS-26C31EH Datasheet Datasheet PDF 183 KB
Application Notes & White Papers
Wafer by Wafer Low Dose Rate Acceptance White Paper White Paper PDF 533 KB
AN9519: Using the HS-26C(T)31RH Radiation Hardened RS-422 Line Driver Application Note PDF 301 KB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
AN9654: Use of Life Tested Parts Application Note PDF 224 KB
PCN10123 - Alternate Die Attach Material for Assembly of Intersil Hermetic Packaged Products - Intersil Palm Bay, FL. (ISP) Product Change Notice PDF 230 KB
PCN08050B - AVLSI Technology Update - Consolidation of Wafer Fabrication and Backgrind Operations at the Intersil Palm Bay, Florida Facility Product Change Notice PDF 36 KB
hs-26c31rh Model IBS 34 KB
Intersil Space Products Brochure Brochure PDF 3.14 MB
PIN19011 - Price Increase for the Listed Renesas Electronics America (REA) Radiation Hardened Space Products Price Increase Notice PDF 360 KB
Standard Microcircuit Drawing 5962-96663 (HS-26C31EH, HS-26C31RH, HS-26C31RH-T, HS-26CLV31EH, HS-26CLV31RH) Other 0 KB
HS-26C31EH Total Dose Test Report Report PDF 360 KB
Intersil Commercial Lab Services Brochure PDF 364 KB
PA11003 - Packing Method Change for Intersil TO-xx Metal Can and Flat Pack Packaged Products Product Advisory PDF 499 KB
TB399: LET Threshold for SEU of the HS-26C(T)32RH Operating in Failsafe Mode Other PDF 141 KB

News & Additional Resources