CD4033BPW

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CD4033BPW is a high performance four-bit magnitudinal comparator incorporated in CMOS technology. It is a device which can compare two 4-bit binary numbers that is applied with two sets of four input terminals and provides two corresponding outputs. It emits two outputs, one is an active "lower" which is asserted when the number in the lower order group is the lesser and an active "equal" which is asserted when the two groups are equal. CD4033BPW belongs to the Logic - Counters, Dividers.

The application field of CD4033BPW is quite wide, such as in digital/analog acquisition systems and in digital displays, etc. For example, in digital/analog acquisition systems, CD4033BPW can be used to check whether the voltage from the acquisition system is either greater or less than the reference voltage. In digital displays, CD4033BPW can detect the leading or the trailing edge of a binary number and display the content of the data bus.

The working principle of CD4033BPW is very simple. First, two sets of four input terminals are connected to four binary numbers. It then compares two 4-bit binary numbers along the bit-by-bit comparisons, and the lower-order bit is compared first. If the corresponding bits are both "1" or "0", this comparison will produce a "pass", in which case, the next pair of bits is evaluated. If the respective bits are not both "1" or "0", then a "fail" will occur and the decision for that pair is made based on the relative logic levels. An active "lower" will be asserted when the number in the lower order group is the lesser, and an active "equal" will be asserted when the two groups are equal. When the respective bits are compared and the result is determined, the comparator will produce two output signals that indicate whether the condition is true or false.

A typical application circuit of CD4033BPW is as follows. Four 4-bit binary numbers are applied to terminals A1-A4 and B1-B4. The two outputs, Active Lower and Active Equal, are used to provide the two conditions "lower" and "equal". Additional external sources, such as pull-up resistors and pull-down resistors, are needed to connect to the "lower" and "equal" outputs to define the logic levels. With the help of external resistor, the power consumption is minimized and the noise immunity is improved.

CD4033BPW is a high performance logic device used to compare two 4-bit binary numbers and emit two output signals according to the comparison result. Its application fields are wide, such as in digital/analog acquisition systems and in digital displays. Its working principle is quite simple and a typical application circuit can be provided. It is a powerful device and a must have for those who need to compare two sets of four bit binary numbers.

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