74138 DECODER PDF

74LS is a member from ’74xx’family of TTL logic gates. The chip is designed for decoding or de-multiplexing applications and comes with 3. The 74LS is a high speed 1-of-8 Decoder/Demultiplexer. This device is ideally suited for high speed bipolar memory chip select address decoding. The. The 74LS is a 3-to-8 Decoder/Demultiplexer designed to be used in high- performance memory decoding or data-routing applications requiring very short.

Author: Kajijin Kalkis
Country: Congo
Language: English (Spanish)
Genre: Health and Food
Published (Last): 28 August 2004
Pages: 135
PDF File Size: 3.2 Mb
ePub File Size: 16.78 Mb
ISBN: 252-8-27329-712-2
Downloads: 68467
Price: Free* [*Free Regsitration Required]
Uploader: Babar

The design is also made for the chip to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. The LM is a quadruple, independent, high-gain, internally compensated operational amplifiers designed to have operating characteristics similar to the LM After connecting the enable pins as shown in circuit diagram you can use the input line to get the output.

This way we can realize all the truth table by toggling the three buttons B1, B2 and B3 Three inputs A0, A1 and A2 and with that we have three input to eight output decoder.

This amplifier exhibit low supply-current drain and input bias and offset currents that is much less than that of the LM You must be logged in to leave a review. Reviews 0 Leave A Review You must be logged in to leave a review. The three buttons here represent three input lines for the device.

In high performance memory systems these decoders can be used to minimize the effects of system decoding. Here the outputs are connected to LED to show which output pin goes LOW and do remember the dceoder of the device are inverted.

  ALEEN MALCOLM PDF

The three enable pins of chip in which Two active-low and one active-high reduce the need for external gates or inverters when expanding.

A line decoder can be implemented with no external inverters, and a line decoder requires only one inverter. Product already added to wishlist!

Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design.

Standard frequency crystals — use these crystals to provide a clock input to your microprocessor. Choose an option declder 28 When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory.

74LS138, 3-to-8 Decoder / Demultiplexer – 74138

Product successfully added to your wishlist! As mentioned earlier the chip is specifically designed to be used in high-performance memory-decoding or data-routing applications which require very short propagation delay decodrr. Drivers Motors Relay Servos Arduino.

This means that the effective system delay introduced by the Schottky-clamped system decoder is negligible.

In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. This means that the effective system delay introduced by the decoder is negligible to affect the performance. Decodfr memory unit data exchange rate determines the performance of any application and the delays of any kind are not tolerable there. As shown in table first three rows the enable pins needed to be connected appropriately or irrespective of input lines all outputs will be high.

Select options Learn More. An enable input can be used as a data input for demultiplexing applications. Inputs include clamp diodes.

For understanding the working let us consider the truth table of the device. Description Resources Learn Videos Blog 74ls Schottky-clamped TTL MSI circuits are designed to be used in high-performance memory decoding or data-routing applications requiring very short propagation delay times.

  DL 223 06 DECRETO BERSANI PDF

– 3-to-8 line decoder/demultiplexer; inverting – ChipDB

Features 74ls features include; Designed Specifically for High-Speed: The chip is designed for decoding or de-multiplexing applications and comes with 3 inputs to 8 output setup. The 74lS decode one of eight lines dependent on the conditions at the three binary select inputs and the three enable inputs. TL — Programmable Reference Voltage. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and to simplify system design. Submitted by admin on 26 October In such applications using 74LS line decoder is ideal because the delay times of this device are less than the typical access time of the memory.

A line decoder can be implemented without external inverters and a line decoder requires only one inverter. Features and Electrical characteristics of 74LS Decoder Designed specifically for high speed Incorporates three enable pins to simplify cascading De-multiplexing capability Schottky clamped for high performance ESD protection Balanced propagation delays Inputs accept voltages higher than VCC Supply voltage: Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding.

This device is ideally suited for high speed bipolar memory chip select address decoding. These devices contain four independent 2-input AND gates. For understanding the working of device let us construct a simple application circuit with a few external components as shown below.