MC74HC390AD

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The MC74HC390AD is an integrated circuit (IC) model of high-speed CMOS, which belongs to the Microchip MC74HC family and falls in the logic - counter, dividers class. It offers a double-modulo, presettable, synchronous 4-bit binary counter. It is a type of circuit that emit digital pulses which later on can be used as a reference for the counting of various processes in different kinds of digital circuits. The MC74HC390AD comprises of a 4-bit binary counter, two divide-by-2 sections and divide-by-5 section. It is designed as such to work with 8-bit binary data.

The MC74HC390AD is also known as a presettable synchronous counter which is composed of a master reset terminal and a load input terminal. Furthermore, it allows for a control of load, enable and reset events with the help of the counter’s individual outputs. The main purpose of the chip is counting applications which is mainly for components like frequency divider and pulse shaping. As for its input, the MC74HC390AD is an active-low logic device thus allowing for very low voltage inputs to function consistently. With its outputs, they are designed with open drain logic notably allowing them to go up to 18V swing. Consequently, this makes it possible to form both active-low and active-high outputs.

The MC74HC390AD works with a total supply voltage of ranging between 2V - 6V with 74HC series. As for the recommended operation range, that would be 0.5V - 7V. Other specifics include a power dissipation of 300mW and a propagation delay time of 16ns. Stored temperature should be somewhere around -65 - 150 °C and a recommended operating temperature of 0 - 75 °C. The operating temperature range of this counter is determined by the condition — free air temperature. The current consumption also depends on the output condition; however, typically it should be anywhere from 20uA - 57mA for low to high current conditions.

The application field for MC74HC390AD includes charge pumps, motor control, data converters, a range of clock generators, servers and many more. MC74HC390AD’s main application purpose is mostly for a range of clocked logic circuits due to its ability to produce accurate clock signals. One example of this is MC74HC390AD’s shift registers which have four outputs to form both high and low ranges of logic. Due to its versatility, this kind of counter can also be used for events like measuring pulse duration, pulse counting and sequencing digital signals. Finally, when asking about the limitations of the MC74HC390AD, they are basically that while other IC’s such as the MC74HC393AD tend to be designed with advanced power technologies, the MC74HC390AD’s power management policy is relatively simple.

In conclusion, the MC74HC390AD is a powerful and advanced IC which is a highly versatile choice for all kinds of applications. Its main purpose is for counters and dividers and it’s capable of forming both logic levels — high and low outputs. With its wide operating temperature range, it’s perfect for forming logic circuits and producing accurate clock signals. Even despite its limited power management, this counter is still an ideal contender for a range of operations from frequency dividers, pulse shaping to motor control and data converters.

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