HCTS190MS September 1995 Radiation Hardened Synchronous 4-Bit Up/Down Counter Description The Intersil HCTS190MS is an asynchronously presettable BCD Decade synchronous counter.
Presetting the counter to the number on the preset data inputs (P0 - P3) is accomplished by a low on the parallel load input (PL).
Counting occurs when (PL) is high, Count Enable (CE) is low and the Up/Down (U/D) input is either low for up-counting or high for down-counting.
The counter is incremented or decremented synchronously with the low-to-high transition of the clock.
When an overflow or underflow of the counter occurs, the Terminal Count output (TC), which is low during counting, goes high and remains high for...

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