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SN54LS748 - 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS

Download the SN54LS748 datasheet PDF. This datasheet also covers the SN54LS148J variant, as both devices belong to the same 10-line-to-4-line and 8-line-to-3-line priority encoders family and are provided as variant models within a single manufacturer datasheet.

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Note: The manufacturer provides a single datasheet file (SN54LS148J_MotorolaInc.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN54LS136 QUAD 2-INPUT EXCLUSIVE OR GATE
SN54LS14 SCHMITT TRIGGERS DUAL GATE/HEX INVERTER
SN54LS148 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
SN54LS161A BCD DECADE COUNTERS / 4-BIT BINARY COUNTERS
SN54LS162A BCD DECADE COUNTERS / 4-BIT BINARY COUNTERS

Full PDF Text Transcription

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10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE 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 data line is encoded. Both devices have data inputs and outputs which are active at the low logic level. The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition does not require an input condition because zero is 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.
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