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74HC158 - High Speed CMOS Logic Quad 2-Input Multiplexers

General Description

The Harris CD74HC157, CD74HCT157, CD74HC158 and CD74HCT158 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select input (S).

The Enable input (E) is active Low.

Key Features

  • Common Select Inputs.
  • Separate Enable Inputs.
  • Buffered inputs and Outputs.
  • Fanout (Over Temperature Range) - Standard Outputs.
  • 10 LSTTL Loads - Bus Driver Outputs.
  • . . . 15 LSTTL Loads.
  • Wide Operating Temperature Range . . . -55oC to 125oC.
  • Balanced Propagation Delay and Transition Times.
  • Significant Power Reduction Compared to LSTTL Logic ICs.
  • HC Types - 2V to 6V Operation - High N.

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Datasheet Details

Part number 74HC158
Manufacturer Harris
File Size 24.79 KB
Description High Speed CMOS Logic Quad 2-Input Multiplexers
Datasheet download datasheet 74HC158 Datasheet

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Full PDF Text Transcription (Reference)

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S E M I C O N D U C T O R CD74HC157, CD74HCT157, CD74HC158, CD74HCT158 High Speed CMOS Logic Quad 2-Input Multiplexers Description The Harris CD74HC157, CD74HCT157, CD74HC158 and CD74HCT158 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active Low. When (E) is High, all of the outputs in the 158, the inverting type, (1Y-4Y) are forced High and in the 157, the noninverting type, all of the outputs (1Y-4Y) are forced Low, regardless of all other input conditions. Moving data from two groups of registers to four common output busses is a common use of these devices. The state of the Select input determines the particular register from which the data comes.