The Intersil ACS374MS is a radiation hardened octal D-type flip-flop with three-state outputs. The eight edge-triggered flip-flops enter data into their registers on the low to high transition of clock. The output enable (OEN) controls the three-state outputs and is independent of the register operation. When the OEN is high, the outputs will be in the high impedance state. The ACS374MS utilizes advanced CMOS/SOS technology to achieve high-speed operation. This device is a member of the radiation hardened, high-speed, CMOS/SOS logic family.


  • 1.25 micron radiation hardened SOS CMOS
  • Total dose 300K RAD (Si)
  • Single Event Upset (SEU) immunity <1 x 10-10 errors/bit-day (Typ)
  • SEU LET threshold >80 MEV-cm2/mg
  • Dose rate upset >1011 RAD (Si)/s, 20ns pulse
  • Latch-up free under any conditions
  • Military temperature range: -55 °C to +125 °C
  • Significant power reduction compared to ALSTTL logic
  • DC operating voltage range: 4.5V to 5.5V
  • Input logic levels
    • VIL = 30% of VCC Max
    • VIH = 70% of VCC Min
  • Input current ≤1µA at VOL, VOH




Design & Development