CD4042 Quad Clocked D Latch IC

CD4042 comprises of four clocked ‘‘D’’ latches, designed by using monolithic complementary MOS (CMOS) technology, integrated with P- and N-channel enhancement mode transistors.It consists of four latches having a common clock input, four buffered inputs and outputs pins. Each Latch inside CD4042 consists of 1 data input pin and two outputs Q and ~Q. The change in both outputs’ value depends on the clock level. In addition to these inputs, it also consist of polarity input which used to program the clock input.

The data present at the data input is transformed to Q when the polarity input remains LOW. The transfer occurs during the 1 clock level during the 0 clock level and when it is HIGH. The data is sent to the outputs at each clock transition, based on the polarity input. However, at the same clock level, the value remains constant until the clock signal value changes and becomes the polar opposite of the previous one.

The IC’s output is always packaged in a 16-pin dual inline hermetically sealed box (DIP). This IC also has good noise immunity, low thermal dissipation, and ESD protection, among other things. Low power consumption and a wide voltage supply range are two advantages of CMOS logic-based ICs. A D-type latch/flip-flop with two stable states designed as a timed latch. A D-type latch has a one-clock-cycle delay in its input. Delay circuits are frequently generated by cascading multiple D-type flip-flops, and are used in a variety of applications such as digital television systems. The D-type flip-flop is also known as a D flip-flop or a delay flip-flop.