Description
The Intersil HCTS191MS is a Radiation Hardened asynchronously presettable 4 bit binary up/down synchronous counter.

Features
• 3 Micron Radiation Hardened CMOS SOS
• Total Dose 200K RAD (Si)
• SEP Effective LET No Upsets: >100 MEV-cm2/mg
• Single Event Upset (SEU) Immunity < 2 x 10-9 Errors/Bit Day (Typ)
• Dose Rate Survivability: >1 x 1012 RAD (Si)/s
• Dose Rate Upset: >1010 RAD (Si)/s 20ns Pulse
• Cosmic Ray Upset Immunity 2 x 10-9 Errors/Bit Day
• Latch-Up Free Under Any Conditions
• Fanout (Over Temperature Range)
    - Standard Outputs - 10 LSTTL Loads
• Military Temperature Range: -55oC to +125oC
• Significant Power Reduction Compared to LSTTL ICs
• DC Operating Voltage Range: 4.5V to 5.5V
• LSTTL Input Compatibility
    - VIL = 0.8V Max
    - VIH = VCC/2 Min
• Input Current Levels Ii ≤ 5µA @ VOL, VOH