CD74HC373E

Series:	74HC
Packaging:	Tube
Part Status:	Active
Logic Type:	D-Type Transparent Latch
Circuit:	8:8
Output Type:	Tri-State
Voltage - Supply:	2 V ~ 6 V
Independent Circuits:	1
Delay Time - Propagation:	30ns
Current - Output High, Low:	7.8mA, 7.8mA
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	20-DIP (0.300", 7.62mm)
Supplier Device Package:	20-PDIP
Base Part Number:	74HC373

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A latch is an essential type of logic often used in digital electronics to store state information. In fact, all computers need latches. This provides a way for holding and maintaining information for a certain period of time. Latches can be classified into different types, such as D, JK, and even CD74HC373E latches. CD74HC373E latches are the most popular latch type used in digital circuits because of their low power consumption and fast switching speed. In this article, we will discuss important aspects of CD74HC373E latches, including their application fields, working principle, and their advantages.

Application Field

CD74HC373E latches are mainly used in digital integrated circuits that require parallel data input or output. They are especially suited for high-current logic gates and are also used in many digital systems including embedded controllers, microprocessors, computers, and digital logic systems. Besides, CD74HC373E latches can also be used in the field of low-power logic because of the low power requirements. An example of the application of CD74HC373E latches is in a wide range of electronic circuits that include pulse generators, address selectors, LED display drivers, and even pulse generators used in equipment for measuring times. CD74HC373E latches are also well-suited for multi-drop bus applications. Since CD74HC373E latches are designed for low-power applications, they offer low power consumption during operation. This makes them well-suited for applications where power is a costly resource.

Working Principle

The working principle of a CD74HC373E latch mainly involves data shifting and storage. The latch has an I/O port and a control logic port. The data is then sent to the latch via the I/O port and the control logic activates the latch to either store or shift the data. The latch acts as a register and shifts the data depending on enable and control signals applied to the latch. Once the data is stored into the CD74HC373E latch, it can remain stored for most of the time, with the data bypassing the control logic. The CD74HC373E latch also provides synchronization for externally sourced data. This enables data from multiple sources to be synchronized and the data is shifted from multiple sources, allowing for a streaming approach.

Advantages

The main advantage of the CD74HC373E latch is its low power consumption, which makes it well-suited for low-power applications. The latch also has a low propagation delay which allows faster operation. The latch has an asynchronous reset which enables the user to reset the data at any time and does not affect the shifting speed. The latch also has symmetric response characteristics, meaning it will respond to data from both rising and falling edges. In addition, the latch has separate enable and reset terminals in addition to the power supply and input. This adds flexibility to the application of the latch and allows for the use of multiple sources of data. The latch also has an input voltage range of 2.0V to 6.0V. This enables the latch to be used in both low and high voltage applications. The latch\'s operating temperature range is -40 to +85°C and is therefore suitable for a wide range of applications. Overall, CD74HC373E latches offer an efficient solution for Data in and Data out applications. The latch\'s low power consumption, symmetric response, separate enable/reset terminals, and wide operating temperature range make it well-suited for most low Power and Logic applications.

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