74LV373PW,118 Integrated Circuits (ICs)

Logic latches are used in various electronic applications. With nonvolatile memory and minimal active power, these latches are very versatile and reliable. One of the more common logic latches is the 74LV373PW,118. It’s a 8-bit latch that’s commonly used to store and transfer data between circuits. In this article, we’ll discuss the application field of the 74LV373PW,118, its working principle and other basic knowledge.

Application Field

The 74LV373PW,118 are widely used in numerous circuits and devices. As mentioned before, it’s most commonly used for transferring data between circuits or for permanently storing data in a nonvolatile memory. It can serve as temporary memory for controllers, for example the 8051 controller. It’s also used for creating shift registers which can parallel-to-serial convert 8 bits of data simultaneously. In automotive applications, devices such as airbag and safety modules use the 74LV373PW,118. The latch also finds its way in communication, and data processing circuits. Finally, since its body is only 10.2 x 4.6 mm, and can operate at temperatures as low as -40°C and as high as +85°C, it’s also used in high temperature environments.

Working Principle

The 74LV373PW,118 consists of eight flip-flop latches, each one with its own Data (D), Clock (C), Output Enable (OE), and Output (Q) pins. It’s rated for ≤3.6V VCC, for logic 1 and ≥2VCC for logic 0. It has two separate inputs for data, one that’s active-low (D0#) and one that’s active-high (D1). In its standard operation mode, the 74LV373PW,118 acts as a transparent latch. During this operation, when the Clock (C) pin is high, the D (input) values are transferred to the outputs, state is saved for both logic 0 and logic 1. When the Clock (C) pin is low, however, the latches lock, and thus permanently store the configured data. In addition to controlling the Clock, the Output Enable (OE) pin can also be used to make all outputs go to high impedance. When this mode is activated, all outputs become floating, thus no output is presented at the time.

Conclusion

The 74LV373PW,118 is an 8-bit latch that’s commonly used to store and transfer data between circuits. While it’s rated for ≤3.6V VCC, for logic 1 and ≥2VCC for logic 0 it has two separate inputs for data, one that’s active-low (D0#) and one that’s active-high (D1). It can serve as temporary memory for controllers, for example the 8051 controller. It’s also used for creating shift registers which can parallel-to-serial convert 8 bits of data simultaneously. In addition to applications in automotive, communication, and data processing circuits, the latch also finds its way in high temperature environments. The 74LV373PW,118 acts as a transparent latch, during which when the Clock (C) pin is high, the D (input) values are transferred to the outputs. Lastly, it’s possible to make all latches outputs to high impedance, thus no output is presented.