Description

The Intersil HCS193MS is a Radiation Hardened 4-bit binary UP/ DOWN synchronous counter.

Presetting the counter to the number on the preset data inputs (P0 - P3) is accomplished by a low on the asynchronous parallel load input (PL). The counter is incremented on the low to high transition of the clock-up input (high on the clock-down), decremented on the low to high transition of the clock-down input (high on the clock-up). A high level on the MR input overrides any other input to clear the counter to zero. The Terminal Count Up goes low half a clock period before the zero count is reached and returns high at the maximum count.

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

? Latch-Up Free Under Any Conditions

? Military Temperature Range: -55°C to +125°C

? Significant Power Reduction Compared to LSTTL ICs

? DC Operating Voltage Range: 4.5V to 5.5V

? Input Logic Levels

??? - VIL = 0.30 VCC Max

??? - VIH = 0.70 VCC Min

? Input Current Levels Ii ≤ 5μA at VOL, VOH