The 74F148 is an 8-line to 3-line priority encoder that provides three bits of binary coded output representing the position of the highest order active input, along with an output indicating the presence of any active input. It can be easily expanded via input and output enables to provide priority encoding over many bits.
This document is a technical datasheet for the Fairchild Semiconductor 74F148, which functions as an 8-Line to 3-Line Priority Encoder. The device encodes eight data lines into a three-bit binary code representing the position of the highest order active input and includes outputs indicating the presence of any active input.
| Function | 8-Line to 3-Line Priority Encoder |
|---|---|
| Supply Voltage (Recommended) | +4.5V to +5.5V |
| Operating Temperature Range | 0°C to +70°C |
| Storage Temperature | -65°C to +150°C |
It encodes eight data lines in priority and provides a 3-bit binary priority code.
A priority is assigned to each input so that when two or more are simultaneously active, the input with the highest priority is represented on the output.