How is IC 74138 activated?

How is IC 74138 activated?

This 74LS138 IC has 3-binary select inputs like A, B, & C. If the IC is activated, then these input pins will decide which of the 8 usually HIGH o/ps will go LOW. The enable pins are two active low & one active high.

What is the IC number of the 3×8 decoder?

IC 74HC238
3 to 8 line decoder IC 74HC238 is used as a decoder/ demultiplexer. 3 to 8 line decoder demultiplexer is a combinational circuit that can be used as both a decoder and a demultiplexer. IC 74HC238 decodes three binary address inputs (A0, A1, A2) into eight outputs (Y0 to Y7).

What is IC 74147?

IC-74147 is a Decimal to BCD Priority Encoder. It is a TTL encoder that featured priority decoding of the inputs to ensure that only the highest-order data line is encoded. The ‘147 and ‘LS147 devices encode nine data lines to four-line (8-4-2-1) BCD.

What is difference between decoder and demux?

A Decoder decodes an encrypted input signal to multiple output signals from one format to another format. A De-Multiplexer routes an input signal to multiple output signals. A Decoder has ‘n’ input lines and maximum of 2n output lines. A De-Multiplexer has single input, ‘n’ selection lines and maximum of 2n outputs.

What is the output for IC 74138?

We take the popular 3 to 8 decoder Integrated Circuit 74138. The Integrated Circuit is of 16 pins. We have three input pins which are actively in high state and are classified as I2, I1 and I0. The outputs are actively in low state and are eight in number and are classified as O7*, O6*, …, O0*.

Which IC used in decoder?

Both encoder and decoder are combinational circuits as their output depends only on current values of the input. In this tutorial, the encoder and decoder circuits will be constructed using 7400 Series ICs. From the previous tutorial, it must be known that a decoder can be constructed using NOT and the AND gates.

What is encoder IC?

An encoder IC is manufactured to encode digital data from one format type or code to another that can accept multiple inputs and generate multi-bit output. Their primary functions are speed, security, standardisation by shrinking the size.

What is BCD priority encoder decimal?

Decimal- to- BCD Priority Encoder That means the BCD output is produced corresponding to the highest priority of a decimal digit appearing on the inputs irrespective of all other inputs.

Is IC 74138 active high decoder?

Why decoder is called Minterm generator?

We observe that for each input combination, exactly one output is true and each output equation contains all the input variables and thus decoder can be used to implement any sum of minterms expression and hence called as MINTERM GENERATOR.

Why 74ls138 line decoder is the best choice?

The memory unit data exchange rate determines the performance of any application and the delays of any kind are not tolerable there. In such applications using 74LS138 line decoder is ideal because the delay times of this device are less than the typical access time of the memory.

What is the general description of the 74hc138?

1 General description. The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.

What is the 74ls138 pin configuration?

74LS138 is used in de-multiplexing applications by using enable pin as data input pin. Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design. 74LS138 Pin configuration 74LS138 is a sixteen pin device as shown in pin diagram and we will describe the function of each pin below.

Is the ls138 compatible with ON Semiconductor TTL families?

The LS138 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all ON Semiconductor TTL families.