M54HC257:Rad-Hard Quad 2-Channel Multiplexer 3-State

The M54HCxxx and M54HCTxxx series are composed of 90 types of high speed CMOS functions specifically designed to meet the radiation requirements of the aerospace industry. They include a large set of gates, flip-flops, multiplexers, counters, bus interface and several other functions. The radiation hardness, the single event latch-up (SEL) immunity and the housing in hermetic packages of all types of both series make them ideally suited for use in the most difficult environmental conditions.

Key Features

  • 2 to 6 V operating voltage
  • Low power DC dissipation: 1 μA max. at 25 °C
  • High speed tPD = 8 ns typ. at 25 °C
  • Symmetrical outputs characteristics
  • High noise immunity: 28 % of min. VCC
  • Hermetic packages
  • Rad-hard 50 krad (Si)
  • SEL immune up to 110 MeV/mg/cm²
  • ESCC qualified
  • Same die and electrical specification for engineering and flight models
  • The complete specification of each type is available from the ESCC web site: https://escies.org using its ESCC part number. STMicroelectronics® guarantees full compliance of qualified parts with these ESCC specifications.
Product Specifications
DescriptionVersionSize
DS6794: Rad-hard high speed 2 to 6 V CMOS logic series4.0834 KB
Technical Notes & Articles
DescriptionVersionSize
TN1181: Engineering Model quality level1.1142 KB
Selection Guides
DescriptionVersionSize
Aerospace and Hi-rel - ESCC, JANS & QML products1.02 MB
Sample & Buy
Part NumberSMD PIN/Detailed SpecQuality LevelEPPLOther (comments)Hi-Rel PackageLead FinishPacking TypePackage: Product MarkingMass (gr)ECCN (EU)ECCN (US)Country of Origin
M54HC257KG9408/047/01FESCC Flighttrue-Flat-16GoldCarrier Tape940804701F0.7NECEAR99FRANCE
M54HC257KT9408/047/02FESCC Flighttrue-Flat-16Solder DipCarrier Tape940804702F0.7NECEAR99FRANCE
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
M54HC257KGFLAT16 ESA FPIndustrialN/A
M54HC257KTFLAT16 ESA FPIndustrialN/A
Rad-hard high speed 2 to 6 V CMOS logic series M54HC04
Engineering Model quality level 1N5822U
Engineering Model quality level 1N5822U