CD4089BPWG4

Series:	4000B
Packaging:	Tube
Part Status:	Obsolete
Logic Type:	Binary Rate Multiplier
Supply Voltage:	3 V ~ 18 V
Number of Bits:	4
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP
Base Part Number:	4089

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Introduction

CD4089BPWG4 is a CMOS specialty logic IC designed by Harris Semiconductor, which serves as a universal decoder, encoder and data selector. The application field and working principle of CD4089BPWG4 will be discussed in the following sections.

Application Field

CD4089BPWG4 is mainly used for small- and medium-scale digital systems. It has diverse application fields, including for 4-to-1 line manger, 1-of-2 line selector, simple analog-to-digital converter and 4-bit encoder/decoder. Furthermore, a wide range of data format can be handled by CD4089BPWG4, including BCD (binary-coding decimal), decade-counting, analog signal and other combinations.

Working Principle

The CD4089BPWG4 works with both active-high and active-low inputs. Within the IC, advanced, high-speed CMOS inverters are employed to accept and condition digital inputs and produce digital outputs under various situations.When functioning as a 4-to-1 line multiplexer, the CD4089BPWG4 accepts two active logic inputs and one digital enable input, which can be either active-low or active-high. According to the logic levels applied to the enable input, the input lines can be switched between the logic levels on lines 1 and 2, or a logic high can be applied to the output line.When functioning as a 4-bit BCD-to-decimal decoder for a keyboard, the CD4089BPWG4 accepts 4 active-low logic inputs corresponding to the BCD characters 0 to 9, and a logic high input from the keyboard scan circuit. When the BCD character is presented on the input lines, the appropriate output line is activated as a logic low.Finally, when functioning as a 1-of-2 line selector, the CD4089BPWG4 accepts two digital inputs and one active-high digital enable input. When the enable input is high, the IC passes the logic level of the first line to the output, while with the logic low level on the enable input, the logic level of the second line is passed to the output.

Conclusion

In conclusion, CD4089BPWG4 is a CMOS specialty logic IC, which serves as a universal decoder, encoder and data selector. It is mainly used as a 4-to-1 line multiplexer, 4-bit BCD-to-decimal decoder or 1-of-2 line selector for small- and medium-scale digital systems. The CD4089BPWG4 works with both active-high and active-low inputs, and can handle a wide range of data formats.

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