datasheets 74ls147 free download

File name 74ls147.pdf

SN54/74LS147 10-LINE-TO-4-LINE SN54/74LS148 AND 8-LINE-TO-3-LINE SN54/74LS748 PRIORITY ENCODERS The SN54 / 74LS147 and the SN54 / 74LS148 are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest order 10-LINE-TO-4-LINE data line is encoded. Both devices have data inputs and outputs which are AND 8-LINE-TO-3-LINE active at the low logic level. The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The implied PRIORITY ENCODERS decimal zero condition does not require an input condition because zero is LOW POWER SCHOTTKY encoded when all nine data lines are at a high logic level. The LS148 encodes eight data lines to three-line (4-2-1) binary (octal). By providing cascading circuitry (Enable Input EI and Enable Output EO) octal expansion is allowed without needing external circuitry. The SN54 / 74LS748 is a proprietary Motorola part incorporating a built-in J SUFFIX deglitcher network which minimizes glitches on the GS output. The glitch CERAMIC occurs on the negative going transition of the EI input when data inputs 0