3 to 8 line decoder 74ls138 pdf

Sn74ls8 old version datasheet 3line to 8line decoders demul tiplexers. The setup of this ic is accessible with 3inputs to 8output setup. It accepts three binary weighted address inputs a0, a1 and a2 and, when enabled. The ic 74ls8 is a 3 to 8 line decoder integrated circuit from the 74xx family of transistortransistorlogicgates. Static characteristics voltages are referenced to gnd ground 0 v. Symbol parameter conditions 74hc238 74hct238 unit min typ max min typ max vcc supply voltage 2. Sn74ls8 old version datasheet 3 line to 8 line decordersdemultiplexers.

The dm74ls8 decodes oneofeight lines, based upon the conditions at the three binary select inputs and the three enable inputs. Data is maintained by an independent source and accuracy is not guaranteed. The ls8, sn54s8, and sn74s8a decode one of eight lines dependent on the conditions at the three binary select inputs and the three enable inputs. The ls8, sn5458, and sn7458a decode one of eight lines dependent on the conditions at the three binary select inputs and the three enable inputs. This device is ideally suited for high speed bipolar memory chip select address decoding. The sn74ls8n is a 3line to 8line decoderdemultiplexer, schottkyclamped ttl msi circuit is designed to be used in highperformance memory decoding or datarouting applications requiring very short propagation delay times. The device features three enable inputs e1 and e2 and e3. Sn74ls8 old version datasheet 3line to 8line decodersdemultiplexers. The lsttlmsi sn54 74ls8 is a high speed 1of 8 decoder demultiplexer.

Designing of 3 to 8 line decoder and demultiplexer using ic. Symbolname and function datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. Z88 74ls8 3 to 8 line decoderdemultiplexer ic altronics. Dm74ls8 3to8line decoders incorporates 3 enable inputs to simplify cascading andor data reception dm74ls9 contains two fully independent 2to4line decodersdemultiplexers schottky clamped for high performance typical propagation delay 3 levels of logic dm74ls8 21 ns dm74ls9 21 ns typical power dissipation dm74ls8 32 mw. Jan 26, 2018 3 to 8 decoder design watch more videos at lecture by.

Designing of 3 to 8 line decoder and demultiplexer using. It has the same high speed performanceoflsttl combinedwithtruecmoslowpower consumption. Mm74hc8 3to8 line decoder virginia military institute. With 54 74ls8 the m5474hc8 is a highspeed cmos 3 to 8 line decoder fabricated in silicon gate c2mos technology.

Sn74ls8 old version datasheet 3line to 8line decordersdemultiplexers. With 5474ls8 the m5474hc8 is a highspeed cmos 3 to 8 line decoder fabricated in silicon gate c2mos technology. Dm74ls154 4line to 16line decoderdemultiplexer dm74ls154 4line to 16line decoderdemultiplexer general description each of these 4lineto16line decoders utilizes ttl circuitry to decode four binarycoded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, g1 and g2, are low. Ic 74hc238 is used is used as decoder demultiplexer. Since i am using two 3 8 decoders to develop a 4 to 16 decoder, i want to use 4 inputs out of the two 3 8 decoders. Thus, the 74ls8 will only be in its decoding mode if g1 is at logic 1 and g2a and g2b are at logic 0. Decodificador 748 pdf 74ls, 74ls datasheet, 74ls pdf, buy 74ls, 74ls 3 to 8 decoder. The design is also made for the chip to be used in highperformance memorydecoding or datarouting applications, requiring very short propagation delay times.

The multiple input enables allow parallel expansion to a 1of24 decoder using just three ls8 devices or to a 1of32 decoder using four ls8s and one inverter. Two active low and one active high enables g1, g2a and g2b are provided to ease the cascading decoders. Life support devices or systems are devices or systems. Since i am using two 38 decoders to develop a 4to16 decoder, i want to use 4 inputs out of the two 38 decoders. This means that the effective system delay introduced by the schottkyclamped system decoder is negligible. The chip is designed for decoding or demultiplexing applications and comes with 3. This ic is mainly used in applications like memory decoding with high. The device features three enable inputs e1, e2 and e3. If the device is enabled, 3 binary select inputs a, b and c determine which one of the outputs will go low. Every output will be low unless e1 and e2 are low and. Check with the manufacturers datasheet for uptodate information.

If the device is enabled, 3 binaryselect inputs a, band cdetermine whichone of the outputs will go low. All inputs are equipped with protection circuits against static discharge and transient excess voltage. The main function of this ic is to decode otherwise demultiplex the applications. It has the same high speed performance of lsttl combined with true cmos low power consumption. Dm74ls8 3 to 8 line decoders incorporates 3 enable inputs to simplify cascading andor data reception dm74ls9 contains two fully independent 2 to 4 line decodersdemultiplexers schottky clamped for high performance typical propagation delay 3 levels of logic dm74ls8 21 ns dm74ls9 21 ns typical power dissipation dm74ls8 32 mw. So ill use all three of the first and the first of the second, and connect the last two inputs to ground, since they wont be used. Sn74ls8 old version datasheet 3 line to 8 line decodersdemultiplexers. The 74ls8, whose generic product name is 3to8 line decodermultiplexer, obeys the truth table shown in table 1. The lsttlmsi sn5474ls8 is a high speed 1of8 decoderdemultiplexer. Jun 22, 2019 decodificador 748 pdf 74ls, 74ls datasheet, 74ls pdf, buy 74ls, 74ls 3 to 8 decoder. The dm74als8 decodes oneofeight lines, based upon the conditions at the three binary select inputs and the three enable inputs. The lsttlmsi sn5474ls8 is a high speed 1of8 decoder. Any pointers on where to go from here are appreciated. Pin number pin name description 1 a0 address input 0 2 a1 address input 1 3 a2 address input 2 4 e1 enable input 1 active low 5 e2 enable input 2 active low 6 e3 enable input 3 active high 7 y7 output 7 active low 8 gnd ground 9 y6 output 6 active low 10 y5 output 5 active low 11 y4 output 4 active low.

The setup of this ic is accessible with 3 inputs to 8 output setup. The multiple input enables allow parallel ex pansion to a 1of24 decoder using just three ls8 devices or to a 1of32 decoder using four ls8s and one inverter. Ic 74hc238 decodes three binary address inputs a0, a1, a2 into eight outputs y0 to y7. Nipdau level1260cunlim 0 to 70 74ls8 sn74ls8nsr active so ns 16 2000 green rohs. Sn74ls8 old version datasheet 3 line to 8 line decoders demul tiplexers. Jan 25, 2015 748 decoder ic 3 to 8 decoder pin diagram 748 working of 748 why 748 have 3 enable pin duration. The multiple input enables allow parallel expansion to a 1of24 decoder using just three ls8 devices or to a 1of32 decoder using four ls8s and. If the device is enabled these inputs determine which one of the eight normally high outputs will go low. The chip is designed for decoding or demultiplexing applications and comes with 3 inputs to 8 output setup. How can i design a 4to16 decoder using two 3to8 decoders. Dm74als8 3 to 8 line decoderdemultiplexer physical dimensions inches millimeters unless otherwise noted continued 16lead plastic dualinline package pdip, jedec ms001, 0. Competitive prices from the leading 3to8 line decoder demultiplexer decoders encoders distributor. The design is also made for the chip to be used in highperformance memorydecoding or datarouting applications, requiring very short propagation delay ti.

The lsttlmsi sn74ls8 is a high speed 1of8 decoderdemultiplexer. Check with the manufacturers datasheet for up to date information. Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems. Gowthami swarna, tutorials point india private limited. Decodes oneofeight lines based upon the select inputs. Oct 25, 2018 the lsttlmsi sn74ls8 is a high speed 1of 8 decoder demultiplexer.