MC14518BDWR2G

The MC14518BDWR2G is a dual 4-Bit Presettable BCD Binary Synchronous Up/Down Counter which is used in constructing digital circuits. It includes a 4-bit up-down binary (U/D BIN) counter and a 4-bit up-down BCD counter, both of which have synchronous separate clock (CLK U and CLK D respectively). This device is suitable for applications in which frequency/pulse counting is required, such as in timers, display counting, and clock generators.

The MC14518BDWR2G offers an efficient way to construct digital circuits for universal frequency/pulse counting. It consists of two synchronous up-down counters with separate clock inputs. The U/D BIN counter is a 4-bit binary counter which is used for generating a 0-√15 up/down count sequence from the 4-bit counter outputs. Meanwhile, the 4-bit up-down BCD counter is designed to drive two 4-bit BCD decode logic circuits to generate 2-line BCD outputs. Both binary and BCD up/down count operations are synchronized by synchronous clock input.

The MC14518BDWR2G includes two major blocks, namely the U/D BOUT Counter and the CLK U/D Counter. The U/D BOUT Counter has four binary output pins that can be used to generate a 0√-15 up/down count sequence. The U/D BIN Counter has four preset pins which can be used to reset the binary output data in either up or down count operations. The four output pins can also be used to form a decade counter by connecting them to two 4-bit BCD decode logic circuits. The operating sequence of the counter can be enabled by the PRESET and U/D inputs.

The CLK U/D Counter consists of two clock inputs for up-down binary and BCD count operations. Two clock enable pins are used to independently enable the two up-down count operations. The up-down counter can be enabled by a single pulse from the clock enable pins. The two clock Pulse Width Modulator (PWM) inputs can be used to control the output of both BCD and binary count whereby different speeds can be obtained. The outputs of both the up-down binary and BCD count operations are guaranteed to be synchronous in the MC14518BDWR2G.

In conclusion, the MC14518BDWR2G is a dual 4-bit BCD binary synchronous up/down counter which is used in constructing digital circuits in applications such as frequency/pulse counting, timer and clocks. This device includes a 4-bit binary counter, four preset pins, two clock enable pins, and two clock inputs which enable the construction of a versatile counter for various types of applications. Furthermore, the two simultaneous count operations are guaranteed to be synchronous in the MC14518BDWR2G.