HEF4024BT,653

The HEF4024BT,653 is an integrated circuit from the 4000 series by NXP Semiconductors. It is a four bit ripple counter which counts from 0 up to 9 and then resets itself to zero. It belongs to the Logic - Counters, Dividers application field.

Its logical structure is such that each of its four bit inputs, D0, D1, D2 and D3, can take either high or low states, and each output, Q0 to Q3 can take either high or low states. The logical structure of the HEF4024BT,653 results in a four bit synchronous decade counter — each time a pulse is applied to the clock input, the count advances by one so it cycles from 0 to 9 and back again to 0. This type of device is known as a ripple counter due to the fact that the count advances only with each clock pulse, whereas the outputs do not necessarily change at the same time.

The internal structure of the HEF4024BT,653 is based on 4 flip-flops, connected in a daisy-chain format such that the output of each flip-flop is the input of the next. Data is passed from one flip-flop to the next in a ripple fashion, hence the designation of the device as a ’ripple counter’. The counter works in monostable mode, which is where the outputs will remain in their current state until a trigger pulse input is given. The counter is not reset until a reset line is given and is only affected by a clock pulse given to the clock line. This pulse is applied to the head flip-flop in the chain, and causes the count to advance by one. This set-up allows for synchronous counting, where each output is synchronized with the clock pulse.

The HEF4024BT,653 works best in synchronous mode, where the outputs are captured and synchronized with the global clock speed. This ensures that they remain in the same positions relative to one another and that events happen in the same relative time frame. It also means that glitches in the count operation are minimized, and that the cycle of the counter remains consistent. The operation of the counter can be set to toggle on a 0-9 cycle or on a 0-15 cycle. Two enable inputs, ENA and ENB, will enable the counter to be used for multiple counter operations for specific applications.

The HEF4024BT,653 is found in digital systems, such as frequency dividers, where it provides the dividing or counting of signals or digital pulses. It is well suited to applications such as pulse width modulation, digital clocks and stop watches, timers, signal dividers or frequency dividers. It is available in a variety of packages and can operate over a wide range of voltage and temperature ranges.

In summary, the HEF4024BT,653 is a four bit ripple counter that is used in many digital systems which require a divide by ten counter. The outputs are synchronized with the clock pulse and can be used in various applications. It has two enable inputs which allow for use in multiple counter operations, and is capable of operating at a wide range of voltages and temperatures.