SN74HC393DBR

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Logic - Counters, Dividers

The SN74HC393DBR is an advanced and highly adjustable 4-bit binary counter from Texas Instruments. It is an unique CMOS device with dual 4- bit synchronous binary counters, each of which includes four stages of ripple carry counters. The counters are triggered by external clock and reset inputs. It is designed to function with a wide range of power sources, from 5V to 10V and is designed to count at speeds of up to 3 MHz.

Application Fields

The SN74HC393DBR is an ideal solution for many applications such as digital logic equipment, audio/video systems, and communication equipment. It can be used to provide specific timing functions and frequency division. Additionally, the counter can be applied in designs that require precise division of signals or data processing. For example, it can be used to divide a frequency by multiples of two and count the number of clock pulses, or it can be used to divide a multiple of twelve clock pulses into individual pulses.

The device is suitable for high speed logic and low power requirements. It is designed to meet the tough requirements of many industrial, automotive, and communication applications that are exposed to harsh and high-temperature operating environments. It can also be found in measurement instruments, such as thermocouples, pressure sensors, and light detectors.

Working Principle

The SN74HC393DBR is an advanced version of the SN74HC393D. The device provides a binary counting operation that is synchronous to an external clock signal. The device can be configured in a few different counting operations. It can be used as a simple 4-bit binary counter, or as a dual 4-bit binary counter with each of the four sections counting in a ripple-carry or synchronous mode. When configured for counting, the device resets itself whenever it reaches the terminal count of its count sequence.

The device is highly configurable depending on the mode it is operated in, the number of stages it is used with, the counter type, and the reset behavior. When used in ripple-carry mode, the counters can be set up to count up or down, in synchronous mode they can be set up to count up or down, and the reset behavior can be configured so that it is either positive or negative active.

The device also operates at a wide range of supply voltages, from 5V up to 10V. This allows the device to be used in both low and high voltage applications, even in very demanding automotive and industrial applications. Additionally, the device can operate at speeds up to 3MHz, which makes it ideal for high speed logic based applications.

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