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The NTE74110 is a DC coupled, variable-skew, J-K flip-flop in a 14-lead plastic DIP-type package that utilizes TTL circuitry to obtain 25MHz performance typically. It is termed "variable-skew" because it allows the maximum clock skew in a system to be a direct function of the clock pulse width. The J and K inputs are enabled only during a short period (20ns maximum setup time plus 5ns maximum hold time) on the rising edge of the clock pulse. After this, inputs may be changed while the clock is at the high level without affecting the state of the master. On the threshold level of the falling edge of the clock pulse, the data stored in the master during the rising edge will be transferred to the output. The effective allowable clock skew then is minimum propagation delay time minus hold time, plus clock pulse width. This means that the system designer can set the maximum allowable clock skew needed by varying the clock pulse width. Thus, system design is made easier and the requirements for sophisticated clock distribution systems are minimized or, in some cases, entirely eliminated. This flip-flop has an additional feature -- the synchronous input has reduced sensitivity to data change while the clock is high because the data needs to be present for only a short period of time and the system's susceptibility to noise is thereby effectively reduced. The NTE74110 has the same functional advantages as the NTE7472 in that three-input AND logic is provided for both the J and K data functions. Preset and clear inputs, which are completely independent of the state of the clock, are also provided.
Unless otherwise specified, all voltages are referenced to GND
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