CD4002BNSRG4

Current - Output High, Low:	3.4mA, 3.4mA
Base Part Number:	4002
Package / Case:	14-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	14-SOP
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Max Propagation Delay @ V, Max CL:	90ns @ 15V, 50pF
Logic Level - High:	3.5 V ~ 11 V
Logic Level - Low:	1.5 V ~ 4 V
Series:	4000B
Current - Quiescent (Max):	1µA
Voltage - Supply:	3 V ~ 18 V
Features:	--
Number of Inputs:	4
Number of Circuits:	2
Logic Type:	NOR Gate
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Recently, technology has been advancing rapidly and with it our understanding of logic gates and inverters has grown. One such example is the CD4002BNSRG4, an integrated circuit (IC) which performs numerous logic functions, making it an attractive solution for many applications. This article will explore the application fields and working principle of the CD4002BNSRG4.

What is the CD4002BNSRG4

The CD4002BNSRG4 is a dual 4-stage static shift register, supplied in a 14-pin flat-pack. This IC is ideal for applications where up to 8 bits of data need to be shifted in and out. The CD4002BNSRG4 integrates two four-stage shift registers, one in parallel with the other, each featuring a single clock input pin and single output pin. All data inputs and data outputs are brought to the same pin for easy connection.The CD4002BNSRG4 has two types of logic functions, a shift register and a storage register. The shift register will move the binary data from input to output one bit at a time on the rising edge of the clock signal while the storage register holds the data in a stable state until the next clock signal. The shift register is the more commonly used of the two, so the majority of this article will focus on that aspect of the CD4002BNSRG4.

Application Fields of the CD4002BNSRG4

The CD4002BNSRG4 is primarily used in digital logic systems and has a wide range of application fields. It can be used as a serial-to-parallel/parallel-to-serial converter, as a logic-level translator, as an output port extender or as an 8-bit storage latch. Aside from these applications, the CD4002BNSRG4 can be used for control applications. For example, the shift register can be used to synchronize multiple microprocessor systems or even control LED displays. In such applications, the data is loaded into the register, shifted out and fed directly to the individual output lines.The CD4002BNSRG4 is also commonly used in communication systems. It can be used to control multiple serial devices in parallel, allowing them to communicate. The shift register can also be used to send a stream of data over a serial bus, such as RS-232.The IC is also useful for data acquisition applications. It can be used to scan a digital input and convert it into a parallel data format, which can then be read by a microprocessor. The CD4002BNSRG4 can also be used to store data. Its ability to hold data in a stable state means that it can act as a data buffer or latch. This is particularly useful for input/output devices where the data needs to be stored for a certain amount of time before it is processed.

Working Principle of the CD4002BNSRG4

The CD4002BNSRG4 is a logic-level shift register which includes two 4-stage shift register sections. Each section has a clock input, data input and data output. The shift register works by shifting the data bits one by one on the rising edge of the clock. The first bit is loaded when the first clock pulse is applied, and the last bit is shifted out when the last clock pulse is applied.The register consists of four stages named S0, S1, S2 and S3. Each stage is a shift register latch, with two NAND gates as shown in the figure below. When the clock input is HIGH, the NAND gates are enabled and the bit of data at the D input is shifted into the register. When the clock is LOW, the NAND gates are disabled and the data is “latched” in the current stage. Each subsequent clock pulse will move the data one stage further.The output of each stage is connected to the input of the next, while the output of the last stage is shifted out of the shift register. This means that the same data is shifted out of the register as was shifted in, but shifted one bit at a time. With each clock pulse, the data is shifted one bit further.

Conclusion

The CD4002BNSRG4 is an integrated circuit which performs numerous logic functions, making it a great choice for many applications. It is a dual 4-stage static shift register, which is useful for logic-level translation, serial-to-parallel/parallel-to-serial conversion, control applications, communication systems, and data acquisition. The shift register works by shifting the data bits one by one on the rising edge of the clock, and it consists of four stages, each of which is a shift register latch with two connected NAND gates. This article has discussed the application fields and working principle of the CD4002BNSRG4.

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