DESCRIPTION
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 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 LOGIC DIAGRAM 2/11 M54/M74HC148 PIN DESCRIPTION
PIN No 9, 7, 6 11, 12, 13, 1, 2, 3, 4, 10 15 5 14 8 16 SYMBOL A0 to A2 0 to 7 NAME AND FU...
STMicroelectronics
