DM74ALS138M

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Logic circuits are used in numerous application fields and it is one of the most important parts in the development of modern electronics. One of the fundamental components of this technology is the Signal Switches, Multiplexers and Decoders. The DM74ALS138M decoder/demultiplexer is one of the most popular integrated circuits of this category. This article introduces the application field and working principle of DM74ALS138M.

The DM74ALS138M decoder/demultiplexer is a high-speed, low-power self-contained device. It is generally employed as a 1-of-8 line decoder/demultiplexer with common select inputs (A, B and C). This device is designed to interface data buses with a memory or input/output device while select lines are employed to control which device will be addressed.

The device is an active low device with a low output impedance and a high sink current capability. The DM74ALS138M provides an active input buffer for each select line. It has an active LOW enable (G) pin to disable all the outputs.For proper operation, the enable input is connected to VCC or left open.

The device is an example of a low-power, high-performance 1-of-8 decoder/demultiplexer. It has three active-low, common select inputs and eight corresponding active-low outputs. It incorporates a latch-up immunity feature which prevents the outputs from latchingup if they are all held low.

The DM74ALS138M is usually employed as an 1-of-8 decoder/demultiplexer with common select inputs (A, B and C). The device is designed to interface data buses with a memory or input/output device while select lines are employed to control which device will be addressed. The device uses an activeLow enable (G) input to disable all outputs.

The DM74ALS138M provides an active input buffer for each select line. This allows for the use of larger capacitive loads with improved noise immunity and input protection. The device also includes a latch-up immunity feature that prevents the outputs from latching up if they are all held low.

The DM74ALS138M has a propagation delay of approximately 350ns from clock enable to high or low-output state. This makes it ideal for applications requiring high speed and low power consumption. Additionally, the DM74ALS138M is available in a wide variety of packages for surface mount and through hole applications.

In conclusion, the DM74ALS138M is an example of a low-power, high-performance 1-of-8 decoder/demultiplexer. It has three active-low, common select inputs and eight corresponding active-low outputs. The device is designed to interface data buses with a memory or input/output device while select lines are employed to control which device will be addressed. The device provides an active input buffer for each select line, incorporated with a latch-up immunity feature which prevents the outputs from latchingup if they are all held low. Additionally, it is available in a wide variety of packages for surface mount and through hole applications.

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