74HC148
DESCRIPTION
The M54/74HC148 is a high speed CMOS 8-TO-3 LINE PRIORITY ENCODER fabricated in silicon gate C2MOS technology. It has the same high speed performance for LSTTL bined with true CMOS low power consumption. The M54/74HC148 encodes eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. Data inputs are active at the low logic level. All inputs are equipped with protection circuits against static discharge and transient excess voltage. INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN CONNECTIONS (top view)
NC = No Internal Connection
October 1992
1/11
M54/M74HC148
TRUTH TABLE
INPUTS E1 H L L L L L L L L L
X: Don’t Care
OUTPUTS 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 A2 H H L L L L H H H H A1 H H L L H H L LL H H A0 H H L H L H L H L H GS H H L L L L L L L L E0 H L H H H H H H H H
0 X H X X X X...
