CD74HC393E

Timing:	--
Base Part Number:	74HC393
Supplier Device Package:	14-PDIP
Package / Case:	14-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 125°C
Voltage - Supply:	2V ~ 6V
Trigger Type:	Negative Edge
Count Rate:	35MHz
Series:	74HC
Reset:	Asynchronous
Number of Bits per Element:	4
Number of Elements:	2
Direction:	Up
Logic Type:	Binary Counter
Part Status:	Active
Packaging:	Tube

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CD74HC393E is an integrated 4-bit synchronous binary counter with dual clock. It consists of a type D flip-flop and an internal clock circuit. The counter of CD74HC393E can be used to count the number of clocks signal and also can be used as frequency divider. CD74HC393E operates using two separate clock inputs either in parallel or cascade mode. Its clock can be driven either high or low pulse or both. This counter is an improved version of CD74HC390 by adding an asynchronous reset input. This asynchronous reset input makes it suitable for a variety of applications. The counter includes a clock enable input, which can enable or disable both clocks at the same time, making it useful for applications where the number of clocks required is restricted.CD74HC393E applications includes:1. Frequency dividers: CD74HC393E is used as a frequency divider in various systems for dividing down a given clocks signal into desired frequencies. The counter can generate a variety of frequencies such as 50-100Hz, 100-200Hz, or even higher. It is also suitable for applications that require the conversion of high frequency clock signals into slower frequency signals.2. Timer: CD74HC393E is often used as a timer in embedded systems. It can be used to set the duration of a specified task and can be used with a watchdog timer to implement fail-safe functionalities.3. Communication: CD74HC393E can be used in communication systems to generate baud rates or RTT (round trip time) values between two devices.4. Counters and logic circuits: CD74HC393E can be used for a wide variety of logic circuits such as counter circuits and shift registers. It is also used in many control systems for generating various signal patterns.The working principle of CD74HC393E is based on a type D flip-flop which has two inputs clock and enable. The clock signal is used for incrementing the counter, while the enable signal allows for enabling or disabling the clock. When the enable signal is low, a single pulse at the clock input increments the counter, while when the enable signal is high, a single pulse at the clock input decreases the counter. CD74HC393E is capable of counting in both directions (up and down). The counter can also be reset to zero by applying a low pulse at the reset input. The pulse must be at least 100ms long in order for the counter to reset itself. The CD74HC393E can also be connected in cascade mode in order to cascade multiple counters and increase the number of bits or counter length.In summary, CD74HC393E is a 4-bit synchronous binary counter with dual clock and asynchronous reset input. It is suitable for applications such as frequency dividers, timers, communications, counters and logic circuits. Its working principle is based on a type D flip-flop and it is capable of counting in both directions (up and down). CD74HC393E is an improved version of CD74HC390, which increases its suitability for a variety of applications.

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