CD4021BE

Series:	4000B
Packaging:	Tube
Part Status:	Active
Logic Type:	Shift Register
Output Type:	Push-Pull
Number of Elements:	1
Number of Bits per Element:	8
Function:	Parallel or Serial to Serial
Voltage - Supply:	3 V ~ 18 V
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-PDIP
Base Part Number:	4021

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The CD4021BE is an 8-stage static shift register that is used to store data. It is a part of the family 4021, which is a subset of the larger 4000 family of logic integrated circuits. This is an 8-bit shift register that has an active-low parallel enable, a serial input and an output. The CD4021BE is available in 14-pin plastic or ceramic dual-in-line packages and is designed to operate at temperatures ranging from -55 °C to +125 °C. The CD4021BE is a static shift register, meaning it does not require a clock signal as inputs in order for data to be shifted. This makes the device well suited for a number of applications, such as address decoders and schedule memories which require a static shift register that can store data without using a clocked signal. The 4021 family also includes a number of other 8-bit static shift registers such as the CD4020 and the CD4022BE. Each of these shift registers has slightly different characteristics, so it is important to choose the right device for your application. The CD4021BE has two important inputs, the parallel enable and the serial input. The parallel enable is an active-low control input that is used to control the data in the shift register. When the parallel enable is low, data will be shifted in from the serial input into the shift register. When the parallel enable is high, the data will remain unchanged and no data will be shifted in from the serial input. The serial input is used to shift data into the register one bit at a time. It is important to note that the data is shifted in from the least significant bit first. This means that the data should be entered in reverse order, starting with the least significant bit. The CD4021BE has an active-low parallel output. This output is used to output the data that is currently stored in the shift register. The output will be high when the data in the register is set to all 0s, and low when the data is set to any other value. In terms of applications, the CD4021BE is commonly used in address decoders and schedule memories, as well as in logic circuits such as Counters, Registers, and Shift Counter Circuits. Because it is a static shift register, it is also well suited for applications that require data to be stored without a clocked signal. In conclusion, the CD4021BE is an 8-bit static shift register with an active-low parallel enable, serial input, and an active-low parallel output. It is suitable for applications such as address decoders and schedule memories, as well as for logic circuits such as Counters, Registers, and Shift Counter Circuits. This shift register can be used to store data without the use of a clocked signal, making it an ideal device for static shift register applications.

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