What is 74147 IC?
What is 74147 IC?
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 the output of the IC 74147 decimal-to-BCD encoder when input I8 is low?
74147 is a priority decimal-to-BCD encoder IC, which accepts 9 active-LOW inputs (I1, I2, I3, I4, I5, I6, I7, I8, I9) to produce an active-LOW 4-bit binary code (BCD: Y3 Y2 Y1 Y0). For example, if I9 input is LOW, then it is active. Thus, its index, 9, is converted to a 4-bit binary code, which is 1001.
How does a priority encoder work?
The Priority Encoder solves the problems mentioned above by allocating a priority level to each input. The priority encoders output corresponds to the currently active input which has the highest priority. So when an input with a higher priority is present, all other inputs with a lower priority will be ignored.
What is 74LS147?
The SN54/74LS147 and the SN54/74LS148 are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest order data line is encoded. Both devices have data inputs and outputs which are active at the low logic level. The LS147 encodes nine data lines to four-line (8-4-2-1) BCD.
How many output lines are there for 74147 priority encoder?
The ‘147 and ‘LS147 devices encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition, as zero is encoded when all nine data lines are at a high logic level.
Where are decoders used?
Introduction to Decoder The decoder is an electronic device that is used to convert a digital signal to an analog signal. It allows a single input line and produces multiple output lines. The decoders are used in many communication projects that are used to communicate between two devices.
What is the purpose of encoder?
Summary. An encoder is a sensor that detects rotation angle or linear displacement. Encoders are used in devices that need to operate in high speed and with high accuracy.
What is the difference between encoder and priority encoder?
The main difference between encoder and priority encoder is- the encoder generates an error output when more than one input is high. But they are used in applications compressing data. Hence, priority encoders are introduced to overcome the issues of binary encoders.
What is the purpose of priority encoder of flash ADC?
The priority encoder generates a binary number based on the highest-order active input, ignoring all other active inputs.
What are the functions of a decoder?
A decoder is a device that generates the original signal as output from the coded input signal and converts n lines of input into 2n lines of output. An AND gate can be used as the basic decoding element because it produces a high output only when all inputs are high.
What is the need of decoders?
Introduction to Decoder It allows a single input line and produces multiple output lines. The decoders are used in many communication projects that are used to communicate between two devices. The decoder allows N- inputs and generates 2 power N-numbers of outputs.
