CD4029 - Presettable Up/Down Cntr
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Overview
CD4029 - Presettable Binary/Decade Up/Down Counter
The CD4029 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 asynchronously 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 VDD and 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 - Parallel jam inputs
- Binary or BCD decade up/down counting
- This is a Thru-Hole Device
