MC74LVX373MEL

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The MC74LVX373MEL is a 4-bit latch built around flip-flops, allowing data input to be stored when a latch enable signal is applied. A logic-level latch is an electronic component that passes data from the input pin to the output pin as long as the latch enable signal is enabled or active. The MC74LVX373MEL is a low-voltage, and high-performance device, offering multiple switching characteristics.

Features of the MC74LVX373MEL

The MC74LVX373MEL features high-speed logic, and low stand-by supply current with extremely low levels of I/O leakage. It also provides high performance with low noise, and short rise and fall times. The power supply requirements feature a wide operating voltage range, allowing the device to operate at a VCC of 2.0 – 5.5V. The maximum power dissipation for the MC74LVX373MEL is still low, at 625mW. Its high noise immunity also offers 3kV human body model, and 200V machine model.

Logic Blocks of the MC74LVX373MEL

The MC74LVX373MEL is an 18-pin package, comprising of two individual logic blocks, each one identical and is shown in Figure 1. Each logic block consists of (4) inputs, (4) outputs, and (3) control pins. The four inputs are: input A (IA0-IA3); input B (IB0-IB3); latch enable pin (LE HI); and reset/inhibit pin (RI). The four outputs are: output A (OA0-OA3); output B (OB0-OB3); and the latch enable output pin (LE LO). The three control pins are Power (VCC), GND, and Output Enable (OE).

Functional Diagram and Operation

The functional diagram of the MC74LVX373MEL is shown in Figure 2. The LE HI input is an active low input, which when set LOW enables the latch and allows data to be stored. The RI input is an active high input that when set HIGH, it disables the latch and resets the outputs to a logic LOW. When RI is LOW, and LE HI is LOW both input A and B can be switched. The OE input provides a disable function, to disable the outputs. When OE is HIGH, the outputs are disabled, and when OE is LOW, the outputs will be enabled. The LE LO output is the inverse of the LE HI input, and it is useful for cascading multiple latches together.

When LE HI is LOW, data from input A is stored in the LE LO output, and data from input B is stored in the output B. Data will remain stored until the LE HI goes back to HIGH level, at which time the old values at the output are latched. The output will remain at the same level until a new input value is applied by LE HI going low again. When the Reset/Inhibit pin is set HIGH, the latch is forced in a reset condition, causing the output A and output B to go LOW. When the reset/inhibit pin is LOW, the normal operation is set.

Applications of the MC74LVX373MEL

The MC74LVX373MEL is widely used in various logic applications, such as data storage, multiplexing, and clock generation circuits. It is an ideal device for systems requiring a high-speed, low-voltage, low-power, and low-noise design. With its extended operating range, it can be used in a variety of data processing and applications. The MC74LVX373MEL is also widely used in high-speed switching applications, providing high-performance with short rise and fall times.

The MC74LVX373MEL is suitable for pin-for-pin replacement of MC14073 and MC14075, offering better performance and higher speed. It is also compatible with many ASIC devices. One of the most popular applications of the MC74LVX373MEL is in digital systems such as microcontrollers, FPGAs, and embedded controllers.

Conclusion

The MC74LVX373MEL is a low-voltage, and high-speed logic latch designed to incorporate multiple switching characteristics. The MC74LVX373MEL offers excellent performance, low noise, and a wide operating range, making it ideal for data storage, multiplexing, and clock generation circuits. The MC74LVX373MEL is also pin-for-pin compatible with MC14073 and MC14075, offering better performance,higher speed, and lower power, making it a popular choice for embedded controllers, microprocessors, and FPGAs.

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