CC40192 CD40192 Chinese data 40192------Decimal synchronous up/down counter (with preset terminal, dual clock) Brief description: 40192 is a preset BCD reversible counter, which is mainly composed of a four-bit D-type flip-flop. The difference from the general counter is that the up counter and the down counter have two clock input terminals respectively. 40192 has inputs such as reset CR, set control /LD, parallel data D0~D3, up counting clock CPu, and down counting clock CPD. When CR is high, the counter is reset to zero. When /LD is low, the preset number operation is performed, and the data on D0~D3 is placed in the counter. The counting operation is controlled by two clock inputs. When CPD = \"1\", the counter counts by 1 when it jumps on CPu; when CPu = \"1\", the counter counts by 1 when it jumps on CPD. In addition to the four Q outputs, 40192 also has a carry output /CO and a borrow output /BO. /CO and /BO are generally high level. Only in the up-counting mode, when the counter reaches the maximum state, /CO outputs a negative pulse with a width of half a clock cycle. In the down-counting mode, when the counter is all zero, /BO outputs a negative pulse with a width of half a clock cycle.
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