74LS138 DATASHEET PDF DOWNLOAD

This means that the effective system delay. This means that the effective system delay introduced by the decoder is negligible to affect the performance. An enable input can be used as a data input for demultiplexing applications. Two active-low and one active-high. The DM74LS comprises two separate two-line-to-four-. A line decoder can be imple-. A line decoder ca n be implemented with no external inver ters, and a line decoder requires only one inverter.

74ls138 datasheet pdf

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After connecting the enable pins as shown in circuit diagram you can use the input line to get the output. Datasheet similar to 74LS In high-performance memory systems these decoders can.

For understanding the working let us consider the truth table of the device. The DM74LS decodes one-of-eight lines, datasheef upon.

Two active-low a nd one active-high enable inputs reduce the need for external gates or inverte rs when expanding.

74ls138 datasheet pdf

The memory unit data exchange rate determines the performance of any application and the delays of any kind are not tolerable there. A line decoder ca n be implemented with no external inver ters, and a line decoder requires only one inverter.

Order Number Package Number.

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. A line pdg can be imple.

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74ls138 datasheet pdf

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.

An enable input can be used as a data input for demultiplexing applications.

74LS 데이터시트(PDF) – Fairchild Semiconductor

The DM74LS decodes one-of-e ight lines, based upon the conditions a t the three binary select inputs and th e three enable inputs. This means that the effective system delay introduced by the decoder is negligible to affect the performance. A line decoder can be imple- mented with no external inverters, and a line decoder requires only one inverter.

When used w ith high-speed memories, the delay time s of these decoders are usually less th an the typical access time of the memor y. The DM74LS comprises two separate two-line-to-four- line decoders in a single package. This means that the effective system delay. Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design.

(Datasheet) 74LS138 | Fairchild Semiconductor

When used with high-speed memories, the delay times of these decoders are usually less than the typical access time of the memory. Datashset Schottky-clamped circuits are designed to be used. The three buttons here represent three input lines for the device. For understanding the working of device let us construct a simple application circuit with a few external components as shown below.

Datasheet Fairchild Semiconductor pdf data sheet FREE from

The chip is designed for decoding or de-multiplexing applications and comes with 3 inputs 744ls138 8 output setup. 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.

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In high-performance memory systems thes e decoders can be used to minimize the effects of system decoding. All inputs are clamped with high-performance. Features and Electrical characteristics of 74LS Decoder Designed specifically for high speed Incorporates three enable pins to simplify datasheef 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 invert- ers when datadheet.

The DM74LS comprises two separate two-line-to-four.

Dpf high performance memory systems these decoders can be used to minimize the effects of system decoding. Submitted by admin on 26 October This means that the effective system delay introduced by the decoder dataeheet negligible.

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 active-low enable input can be used as a data line in demultiplexing applica- tions.

74ls138 datasheet pdf