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54LS148 Datasheet PDF - Texas Instruments

Part NameDescriptionManufacturer
54LS148 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODEERS TI
Texas Instruments TI
54LS148 Datasheet PDF : 54LS148 pdf   
SN74LS147 image

description/ordering information
These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The ’147 and ’LS147 devices encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition, as zero is encoded when all nine data lines are at a high logic level. The ’148 and ’LS148 devices encode 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. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54/74LS load, respectively.

’147, ’LS147
● Encode 10-Line Decimal to 4-Line BCD
● Applications Include:
   − Keyboard Encoding
   − Range Selection

’148, ’LS148
● Encode 8 Data Lines to 3-Line Binary
   (Octal)
● Applications Include:
   − n-Bit Encoding
   − Code Converters and Generators

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