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74HC148 Datasheet 8-to-3-line Octal Priority Encoder

Manufacturer: Hitachi Semiconductor (now Renesas)

Overview: HD74HC148 8-to-3-line Octal Priority Encoder.

General Description

The HD74HC148 encodes eight data lines to three-line (4-2-1) binary (octal).

Cascading circuitry (enable input EI and enable output EO) is provided to allow octal expansion without the need for external circuitry.

The data inputs and outputs are active at the low logic level.

Key Features

  • High Speed Operation: tpd (0 - 7 to A0 - A2) = 15 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs EI H L L L L L L L L L H : L : X : 0 X H X X X X X X X L 1 X H X X X X X X L H High level Low level Irrelevant 2 X H X X X X X L H H 3 X H X X X X L H H H 4 X H X X X L H H H H 5.

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Similar Datasheet

Brand Logo Part Number Description Manufacturer
Texas Instruments Logo 74HC148 8-Line to 3-Line Priority Encoders Texas Instruments
National Semiconductor Logo 74HC148 8-3 Line Priority Encoder National Semiconductor
Fairchild Logo 74HC148 8-3 Line Priority Encoder Fairchild
STMicroelectronics Logo 74HC148 8 TO 3 LINE PRIORITY ENCODER STMicroelectronics

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