SN74HC7002DG4

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• Logic - Gates and Inverters
  • SN74HC7002DG4 Application Field and Working Principle
  • Application Field
  • The SN74HC7002DG4 is a Dual 4-Input NAND Gate, a type of digital logic gate. It operates at a single 5-volt supply and is capable of producing the logic level corresponding to the most widely available logic IC family, the 7400 Series. It includes two identical 4-input NAND Gates with Schmitt Triggers inputs for high noise immunity. It is used for implementing high speed logic gates in digital logic circuits, where high speed and low noise immunity are needed.
  • The SN74HC7002DG4 is particularly suitable for use in MOS, NMOS, and TTL compatible systems. It fits in a small outline package with a footprint of 0.150 x 0.153 inches (3.81 x 3.88 mm). This package is ideal for applications requiring general purpose logic gate functions, such as in logic circuits, encoders, decoders, and displays.
  • Working Principle
  • The SN74HC7002DG4 is a dual 4-input NAND gate that performs the logical NAND function of four independent inputs. For the logic gates to work, the input voltage signals must be in the logic “low” and “high” range. The logic “high” input levels for SN74HC7002DG4 gates typically range from 2.2V to 10V with respect to ground. The logic “low” input levels for SN74HC7002DG4 gates typically range from -1V to 0.8V with respect to ground. The hysteresis feature of the Schmitt Trigger allows the inputs to be noisy, yet still have clearly defined “high” and “low” logic levels. Furthermore, the SN74HC7002DG4 has a high speed operating frequency of up to 500MHz making it suitable for use in high-speed logic designs.
  • The SN74HC7002DG4 is a logic IC designed to provide a variety of logic functions such as NAND, AND, OR, NOR, EXOR, EXNOR, or NEXOR. The logic function is determined by the function of the inputs. The logic function of the outputs can be either combinational or sequential. Combinational logic means that the outputs are a logical combination of the inputs. Sequential logic means that the output is a function of the current or past states of the inputs. The SN74HC7002DG4 has two outputs, which have a self-complementing output circuit with error protection to ensure that short-term overcurrent conditions are detected and the outputs are automatically shut down. This ensures reliable operation and protects against latch-up.

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