74HCT393DB,112

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74HCT393DB,112 is a dual 4-bit binary counter with synchronous reset and clock inputs. Its type is Logic - Counters, Dividers. It is manufactured by Nexperia using its high-performance silicon-gate CMOS technology. The device has two positive-edge triggered 4-bit binary counters, with individual Reset inputs (R1 and R2) and common Clock input (CP).

The 74HCT393DB,112 provides several advantages. First of all, its reset input is active low, allowing a single reset signal to control both devices. Moreover, the reset logic can be synchronous, allowing for safe asyncrhonous reset operation. Last, but not least important, the device has a low power dissipation since the internal operation is only triggered by the clock signal.

The precise operating characteristics of 74HCT393DB,112 make it suitable for a wide range of applications. The device is commonly used in design projects which require the counting of pulses up to 8-bits. Examples include automotive timers, remote-control systems, digital thermometers, etc. The device is also used in applications for frequency division, as in CMOS clock oscillators, PLL circuits and CPU systems.

A practical example of application includes an up/down counter, constructed using two 74HCT393DB,112 ICs with synchronous reset and clock inputs. The circuit can be used to control the raising and lowering of an output voltage, and enable manual control of the predetermined frequency. The counter is driven by an external clock signal, counting up until it reaches its maximum count, then resetting and counting downward until the minimum count is attained.

The working principle of the 74HCT393DB,112 consists of two stages: a master reset stage and a counting stage. The master reset stage is triggered whenever the reset signal is active low. It sets all the outputs of both devices in the high state, regardless of the existing values. The second stage is the counting stage, which is triggered by the rising edges of the clock signal. It sets the outputs low on each of the 4 outputs in a cascading way.

In summary, the 74HCT393DB,112 is a very useful device in a wide range of Logic - Counters, Dividers applications. Its synchronous reset and low power dissipation make it suitable for use in automotive timers, remote control systems, digital frequency dividers, etc. It is capable of counting up and down, setting the logic outputs high and low based on the rising edges of the clock signal.

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