Service Manuals, User Guides, Schematic Diagrams or docs for : . Electronic Components Datasheets Various datasheets 74ls147

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                                                                                     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 

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