General Description
●The CD4029BM/CD4029BC is a presettable up/down counter which counts in either binary or decade mode depending on the voltage level applied at binary/decade input. When binary/decade is at logical ``1"", the counter counts in binary, otherwise it counts in decade. Similarly, the counter counts up when the up/down input is at logical ``1"" and vice versa.
●A logical ``1"" preset enable signal allows information at the ``jam"" inputs to preset the counter to any state asynchro nously with the clock. The counter is advanced one count at the positive-going edge of the clock if the carry in and preset enable inputs are at logical ``0"". Advancement is inhibited when either or both of these two inputs is at logical ``1"".
●The carry out signal is normally at logical ``1"" state and goes to logical ``0"" state when the counter reaches its maximum count in the ``up"" mode or the minimum count in the ``down"" mode provided the carry input is at logical ``0"" state. All inputs are protected against static discharge by diode clamps to both VDDand VSS.
●Features
●Wide supply voltage range 3V to 15V
●High noise immunity 0.45 VDD(typ.)
●Low power fan out of 2
●TTL compatibility driving 74L or 1 driving 74LS YParallel jam inputs
●Binary or BCD decade up/down counting
