The NTE4017B is 5-stage and 4-stage Johnson counters made by NTE Electronics.
Brief overview of the content in a NTE4017B PDF file
NTE4017B NTE4022B Integrated Circuit CMOS Counter Divider Description The NTE4017B and NTE4022B are 5 stage and 4 stage Johnson counters in 16 Lead DIP type packages having 10 and 8 decoded outputs respectively Inputs include a CLOCK a RESET and a CLOCK INHIBIT signal Schmitt trigger action in the CLOCK input circuit provides pulse shaping that allows unlimited clock input pulse rise and fall times These counters are advanced one count at the positive clock signal transition if the CLOCK INHIBIT signal is low Counter advancement via the clock line is inhibited when the CLOCK INHIBIT signal is high A high RESET signal clears the counter to its zero count Use of the Johnson counter configuration permits high speed operation 2 input decode gating and spike free decoded outputs Anti lock gating is provided thus assuring proper counting sequence The decoded outputs are normally low and go high only at their respective decoded time slot Each decoded output remains high for one full clock cycle A CARRY OUT signal completes one cycle every 10 clock input cycles in the NTE4017B or every 8 clock input cycles in the NTE4022B and is used to ripple clock the succeeding device in a multi device counting chain Features D NTE4017B
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The basic design of an up/down counter involves using a set of flip-flops connected in a specific way. The flip-flops are used to store the current count value, and the input to each flip-flop is derived from the output of the previous flip-flop. When the counter is in the up-counting mode, the flip-flops are connected to a logic circuit that generates a signal to increment the count value by one for each clock pulse. When the counter is in the down-counting mode, the flip-flops are connected to a logic circuit that generates a signal to decrement the count value by one for each clock pulse. Manufacturers : NTE Electronics  |
NTE NTE4017B DATA 5-stage and 4-stage Johnson counters [ Datasheet Search ] |
[ NTE4017B PDF DownLoad ( NTE ) ] |
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