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.

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This means that the effective system delay introduced by the decoder is negligible to affect the performance. Select options Learn More. A line decoder can be implemented with no external inverters, and a line decoder requires only one inverter.

When employed secoder 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. Here the outputs are connected to LED to show which output pin goes LOW and do remember the outputs of the device are inverted. TL — Programmable Reference Voltage. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding.

It features fully buffered inputs, each of which represents only one normalized load to its driving circuit. Drivers Motors Relay Servos Arduino. These devices contain four independent 2-input AND gates.

This means that the effective system delay introduced by the Schottky-clamped system decoder is negligible. Choose an option 3. 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. 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.

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

Submitted by admin on 26 October This enables the use decoser current limiting resistors to interface inputs to voltages in excess of V CC. 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.

The chip is designed for decoding or de-multiplexing applications and comes with 3 inputs to 8 output setup. The three buttons here decodr three input lines for the device.

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

For understanding the working of device let us construct a simple application circuit with a few external components as shown below.

As mentioned earlier the chip cecoder specifically designed to be used in high-performance memory-decoding or data-routing applications which require very short propagation delay times. The 74lS decode one of eight lines dependent on the conditions at decoer three binary select inputs and decodre three enable inputs. Features 74ls features include; Designed Specifically for High-Speed: After connecting the enable pins as shown in circuit diagram you can use the input line to get the output.

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. How to use 74LS Decoder For understanding the working of device let us construct a simple application circuit with a few external components as shown below. This device is ideally suited for high speed bipolar memory chip select address decoding. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding.

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The LM is a quadruple, independent, high-gain, internally compensated operational amplifiers designed to have operating characteristics similar to the LM All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and to simplify system design. Decoeer understanding the working let us consider the truth table of the device. You must be logged in to leave a review. This amplifier defoder low supply-current drain and input bias and offset currents that is much less than that of the LM In high performance memory systems these decoders can be used to minimize the effects decodwr system decoding.

Reviews 0 Leave A Review You must be logged in to leave a review. A line decoder can be implemented without external inverters and a line decoder requires only one inverter. Inputs include clamp diodes.

Product successfully added to your wishlist! Product already added to wishlist! The memory unit data exchange rate determines the performance of any application and the delays of any kind are not tolerable there.

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

Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design. An enable input can be used as a data input for demultiplexing applications. 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. Standard frequency crystals — use these crystals eecoder provide a clock input to your microprocessor.

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