Rad-Hard Dual D-Type Flip-Flop With Preset & Clear

The 54AC and 54ACT series represent over 60 product types with different 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 interfaces, and several other functions. Their radiation hardness, immunity from single event latch-up (SEL) and single event upset (SEU), and housing in hermetic packages make them suitable for the most difficult environmental conditions. The complete specification for each type is available from the DSCC web site: www.dscc.dla.mil. STMicroelectronics guarantees full compliance of qualified parts with these DSCC specifications.

Key Features

  • AC: 2 to 6 V operating voltage
  • ACT: 4.5 to 5.5 V operating voltage
  • High speed TPD = 4.5 ns (typ.)
  • Low DC power dissipation: 8 μA max.
  • Symmetrical 24 mA output characteristics
  • High noise immunity: 28 % of min. VCC
  • Balanced propagation delays
  • Improved electrical latch-up immunity
  • Controlled rise and fall times
  • Operating temperature: - 55 to 150 °C
  • Hermetic packages
  • Rad-hard: 300 krad TID at any Mil1019 dose rates
  • SEL immune to 110 MeV/cm²/mg LET ions
  • RHA QML-V qualified
  • Same die and electrical specification for engineering and flight models



Description Version Size
DB0998 DB0998: Rad-hard advanced high-speed 5 V CMOS logic series 6.0 897 KB
Technical Notes & Articles
Description Version Size
TN0997 TN0997: 54AC74 radiation report 1.2 1 MB
TN1190 TN1190: Additional 100 krad specification for M54HCxx and M54HCTxx series products 2.3 182 KB
TN1181 TN1181: Engineering Model quality level 2.1 371 KB

HW Model, CAD Libraries & SVD

HW Model, CAD Libraries & SVD
Description Version Size
54AC74 – 3.0, 3.3 and 3.36 V – beginning of life IBIS model (.ibs) 1.0 22 KB
54AC74 – 4.5 and 5.5 V – beginning of life IBIS model (.ibs) 1.0 21 KB


Description Version Size
Aerospace and Hi-rel - ESCC, JANS & QML products 1.0 2 MB


型号 Marketing Status SMD PIN/Detailed Spec Quality Level EPPL Other (comments) Hi-Rel Package Lead Finish Packing Type Package: Product Marking Mass (gr) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
RHFAC74K02V Active 5962F8852003VXA QML-V Flight true - Flat-14 Solder Dip Carrier Tape 5962F8852003VXA 0.7 NEC EAR99 FRANCE MORE INFO DISTRIBUTOR AVAILABILITY
RHFAC74K1 Active - Engineering Model true - Flat-14 Gold Carrier Tape RHFAC74K1 0.7 NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office
RHFAC74K01V Active 5962F8852003VXC QML-V Flight true - Flat-14 Gold Carrier Tape 5962F8852003VXC 0.7 NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office
AC74DIE2V Active - - true - - - Tray - - NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office
RHFAC74D03V Active 5962F8852003VCC QML-V Flight true - DIL-14 Gold Carrier Tape 5962F8852003VCC 2.2 NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
RHFAC74K02V ActiveFLAT14 QML narrow FPIndustrialN/A
RHFAC74K1 ActiveFLAT14 QML narrow EMIndustrialN/A
RHFAC74K01V ActiveFLAT14 QML narrow FPIndustrialN/A
AC74DIE2V ActiveDie SpaceIndustrialN/A
RHFAC74D03V ActiveDIL14 FPIndustrialN/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.