SN74LS393NG4

Timing:	--
Base Part Number:	74LS393
Supplier Device Package:	14-PDIP
Package / Case:	14-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	4.75V ~ 5.25V
Trigger Type:	Negative Edge
Count Rate:	35MHz
Series:	74LS
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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SN74LS393NG4 Application Field and Working Principle

The SN74LS393NG4 is a popular dual 4-bit binary counter designed and manufactured by Texas Instruments, which is suitable for a wide range of applications. It belongs to the category of counters, dividers, and logic devices, and is a dual 4-bit asynchronous binary counter which provides a wider range of counting operation than is typically available with a single 4-bit counter.The SN74LS393NG4 chip is usually mounted in a 20-pin package, which allows it to be incorporated into a wide variety of devices, including programmable logic controllers (PLCs), digital timers, calculators, gaming consoles, and in many other types of electronic systems. It is a standard logic device that is widely used in logic circuits to perform a wide range of tasks, such as increasing/decreasing a count, measuring time intervals, and providing control signals for other circuits. The basic components of the SN74LS393NG4 device include two 4-bit synchronous binary counters, a ripple carry lookup table, and two clock inputs (CP and CPV). The two 4-bit synchronous binary counters are used to count the positive transition of the clock signal. Each counter can count from 00 (binary) to 1111 (binary), and when the count reaches 1111 it rolls over to 0000. The ripple carry lookup table is a type of data table used to determine the state of the carry bits when the count reaches 1111. The two clock inputs (CP and CPV) control the behavior of the counters, and when the clock transition occurs, the counter either increases the count or resets the count. The internal logic of the chip is designed to produce logic output signals whenever the counter reaches a specific value, based on the value of the control inputs (CP and CPV). This is achieved by connecting a subset of the binary output pins of the counter to the logic gates, with the output pins of the gates connected to the external inputs or outputs of the device. By setting the control inputs (CP and CPV) to a certain value, the logic gates are able to recognize when a desired count is achieved and produce an accurate output signals. In addition to its use in logic circuits, the SN74LS393NG4 can be used as an 8-bit binary counter by cascading two 4-bit counters. The two counters share a common clock input (CP), and the outputs of the first counter are connected to the enable pins of the second counter. This allows the second counter to be enabled only after the first counter has been incremented by one. This configuration allows the SN74LS393NG4 to be used as an 8-bit counter, with a maximum count of 11111111 (binary). In summary, the SN74LS393NG4 is a popular dual 4-bit asynchronous binary counter device that is suitable for a wide range of applications. It is designed to produce logic output signals whenever the counter reaches a specific value, based on the value of the control inputs (CP and CPV). It can also be used as an 8-bit binary counter by cascading two counters and using a common clock input (CP).

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