What is 4 to 16 decoder?
A 4-to-16 decoder consists of 4 inputs and 16 outputs. Similar to all the decoders discussed above, in this also only one output will be low at a given time and all other outputs are high (using maxterms). The truth table of this type of decoder is shown below.
What is ic 74238?
General description. The 74HC238; 74HCT238 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 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH.
What is 74HC139?
General description. The 74HC139; 74HCT139 decodes two binary weighted address inputs (nA0, nA1) to four mutually exclusive outputs (nY0 to nY3). Each decoder features an enable input (nE). When nE is HIGH all outputs are forced HIGH. The enable input can be used as the data input for a 1-to-4 demultiplexer application …
How many outputs can a 3/8 decoder make?
eight outputs
In 3 to 8 line decoder, it includes three inputs and eight outputs. Here the inputs are represented through A, B & C whereas the outputs are represented through D0, D1, D2… D7.
How many 2 to 4 line decoders with an enable input are needed to construct a 7 to 128 line decoder without using any other logic gates?
hence required decoders (from fig.) = 9 so ans is ( C) part. Article Tags : GATE-CS-2007.
Is IC 74138 active high decoder?
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*.
What is the logic function for a 3/8 decoder with enable?
This decoder circuit gives 8 logic outputs for 3 inputs and has a enable pin. The circuit is designed with AND and NAND logic gates. It takes 3 binary inputs and activates one of the eight outputs. 3 to 8 line decoder circuit is also called a binary to an octal decoder.
What is 74HC series?
The 74HC family of logic devices are high speed, low power devices that use CMOS circuitry. The devices are pin compatible with many existing devices such as the 74TTL, 74STTL and 4000 series.
What is ic7432?
IC 7432 is a logic gate IC which consist of four OR Gates. The OR gate performs logical OR operation. The OR gates come in form of DIP package ICs. Each gate has three terminal two inputs and one output. The ICs are made by CMOS, TTL technology.
How many 2 to 4 decoders are needed to implement an 4 to 16 decoder note all the decoders have an enable input?
Therefore, we require two 3 to 8 decoders for implementing one 4 to 16 decoder. The block diagram of 4 to 16 decoder using 3 to 8 decoders is shown in the following figure.