MM54HC148 - National Semiconductor

MM54HC148 8-3 Line Priority Encoder

This priority encoder utilizes advanced silicon-gate CMOS technology It has the high noise immunity and low power consumption typical of CMOS circuits as well as the speeds and output drive similar to LB-TTL This priority encoder accepts 8 input request lines 0– 7 and outputs 3 lines A0–A2 The priority encoding ensures that only the highest order data line i.

Features

Y Y Typical propagation delay 13 ns Wide supply voltage range 2V
  – 6V Connection Diagram Dual-In-Line Package TL F 9390
  – 1 Order Number MM54HC148 or MM74HC148 Truth Table Inputs EI H L L L L L L L L L 0 X H X X X X X X X L 1 X H X X X X X X L H 2 X H X X X X X L H H 3 X H X X X X L H H H 4 X H X X X L H H H H 5 X H X X L H H H H H 6 X H X L H H H H H H 7 X H L H H H H H H H Outputs A2 A1 A0 GS EO H H L L L L H H H H H H L L H H L L H H H H L H L H L H L H H H L L L L L L L L H L H H H H H H H H H e High L e Low X e irrelevant C1995 National Semiconductor Corporation TL F 9390 RRD-B30.