MM54HC148/MM74HC1488-3 Line Priority EncoderGeneral Des criptionThis priority encoder utilizes advanced silicon-gate CMOStechnology. It has the high noise immunity and low powerconsumption typical of CMOS circuits, as well as the speedsand output drive similar to LB-TTL.This priority encoder accepts 8 input request lines 0±7 andoutputs 3 lines A0±A2. The priority encoding ensures thatonly the highest order data line is encoded. Cascading circuitry(enable input EI and enable output EO) has been providedto allow octal expansion without the need for externalcircuitry. All data inputs and outputs are active at the lowlogic level.All inputs are protected from damage due to static dischargeby internal diode clamps to VCC and ground.FeaturesY Typical propagation delay: 13 nsY Wide supply voltage range: 2V±6V