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In addition to integer data inputs, some decoders also have one or more "enable" inputs. There are several types of binary decoders, but in all cases a decoder is an electronic circuit with multiple input and multiple output signals, which converts every unique combination of input states to a specific combination of output states. They are used in a wide variety of applications, including instruction decoding, data multiplexing and data demultiplexing, seven segment displays, and as address decoders for memory and port-mapped I/O. In digital electronics, a binary decoder is a combinational logic circuit that converts binary information from the n coded inputs to a maximum of 2 n unique outputs.

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Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. Direct LSTTL Input Logic Compatibility, VIL= 0.This article needs additional citations for verification. High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V

Significant Power Reduction Compared to LSTTL Logic ICs.

Balanced Propagation Delay and Transition Times.

Wide Operating Temperature Range :-55oC to 125oC.

Typical Propagation Delay: 13ns at VCC = 5V, CL = 15pF, TA = 25oC.

The “zero” is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH. These devices provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with input l9 line having the highest priority. The 74HC147 9-input priority encoders accept data from nine active LOW inputs (l1 to l9) and provide binary representation on the four active LOW inputs (Y0 to Y3). The 74HC147 are high speed silicon-gate CMOS devices and are pin-compatible with low power Schottky TTL (LSTTL).