SN7497NG4

SN7497NG4 Application Field and Working Principle

The SN7497NG4 is part of Texas Instruments\' family of logic circuits designed to meet the requirements of logic manufacturers in various applications. This a specialized type of logic known as Specialty Logic. The SN7497NG4 is a 4-bit synchronous decoder, ideal for implementations where reliable decoding of binary signals to a single output line is needed.

A decoder is a combinational logic circuit which accepts one or more binary words as inputs, and translates that binary information into one single output line. The SN7497NG4 uses four active-low data inputs and a single active-low and active-high enable input to control a single output line, allowing for a wide range of bit combinations to be decoded. The SN7497NG4 also features a latch-up immunity feature, which protects the circuit from potential unwanted noise.

The SN7497NG4 is often used in devices where it needs to interpret and convert binary signals to a single output line, such as a remote keypad, digital security systems and traffic control systems. It also has applications in display systems, automations and industrial control. This particular type of logic can also be used to develop highly integrated systems as it does not require any external logic so the cost and size of the implementing device are minimized.

Due to the high speed and low latency of the SN7497NG4’s decoding operation, it can be used in a wide variety of applications where fast decoding is needed. This type of logic is particularly suited for asynchronous applications where there is no clock signal to synchronise the decoding of the binary inputs. In addition, the SN7497NG4’s immunity feature makes it an ideal choice for circuits where unwanted noise disturbances can disrupt the decoding of the binary signal.

The SN7497NG4’s architecture is designed to perform a number of logical operations, including decoding, multiplexing, and expanding. The circuit includes a 4-input OR gate and 4-input AND gate, both of which are combined in order to generate the single selected output signal. This allows for a large variety of bit combinations to be decoded into the single output connected to the output of the OR gate.

The SN7497NG4’s enable input is used to control the decoding process. When this input is enabled, the SN7497NG4 will decode the input binary word and generate the single output signal. If the enable input is disabled, the SN7497NG4 will not generate the output signal, allowing the system to remain in a fixed state when the enable signal is disabled.

At the heart of the SN7497NG4 is an internal state machine which controls the logic circuit. This state machine is responsible for the clock-less decoding of the binary signals, allowing the SN7497NG4 to operate asynchronicly. By switching between different states, the circuit can quickly interpret the binary input and generate the single output.