CD74HCT390EG4

The CD74HCT390EG4 is a logic device used in a variety of digital applications. It is one of the most popular counters, dividers and logic devices used in modern technology. In this article, we will explain what the CD74HCT390EG4 is and its common application fields, as well as its working principle.

What is the CD74HCT390EG4?

The CD74HCT390EG4 is a dual binary up/down counter/divider. It is a component from the CD74HC/HCT390 series by Texas Instruments. It is built using CMOS technology with two separate up/down binary counters. It is a high-speed, low power CMOS device that is capable of direct interface with TTL levels and is suitable for medium-to-high speed digital systems.

Application Fields of the CD74HCT390EG4

The CD74HCT390EG4 is commonly found in a variety of digital systems. It can be used as a low-power, general-purpose counter/divider in digital applications. It can also be used in digital audio and video systems, such as digital TVs and DVD players. In addition, it is also used in counter-controlled applications such as frequency division, pulse generation, PWM generation and more.

Working Principle of the CD74HCT390EG4

The CD74HCT390EG4 consists of two independent 4-bit up/down binary counters with a two-input multiplexer. The multiplexer allows data to be entered from either of the two counters and the data can be down- counting or up-counting depending on the logic level of the input control signal. The counters are designed to interact with low-voltage TTL logic devices, making them suitable for medium-to-high-speed digital systems.

When the CE (clock enable) pin is low, the CD74HCT 390EG4 is disabled and the counters are in the reset state. When the CE pin is high, the CD74HCT390EG4 is enabled and the output can be obtained from the selected counter. If the CD74HCT390EG4 is enabled, data can be clocked into the CD74HCT390EG4 and either up or down count depending on the control logic signal.

Conclusion

The CD74HCT390EG4 is a popular logic device that is used in a variety of digital applications. It is a low-power, general-purpose, dual binary up/down counter/divider from the CD74HC/HCT390 series. It can be used in digital audio/video systems, such as digital TVs and DVD players, as well as counter-control applications such as frequency division, pulse generation, PWM generation and more. The working principle of the CD74HCT390EG4 involves a two-input multiplexer, allowing data to be entered from either of the two counters and the data can be up-counting or down-counting depending on the logic level of the input control signal.