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CD54HCT257 - Quad 2-Input Multiplexer

Download the CD54HCT257 datasheet PDF. This datasheet also covers the CD54HC257 variant, as both devices belong to the same quad 2-input multiplexer family and are provided as variant models within a single manufacturer datasheet.

General Description

The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S).

The Output Enable input (OE) is active LOW.

Key Features

  • Buffered Inputs.
  • Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15pF, TA = 25oC.
  • 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (CD54HC257-etcTI.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Texas Instruments

Part Number Description
CD54HCT251 8-Input Multiplexer
CD54HCT251F 8-Input Multiplexer
CD54HCT258 QUADRUPLE 2-LINE TO 1-LINE SELECTORS/MULTIPLEXERS
CD54HCT259 8-Bit Addressable Latch
CD54HCT20 Dual 4-Input NAND Gates

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Data sheet acquired from Harris Semiconductor SCHS171D November 1997 - Revised October 2003 CD54HC257, CD74HC257, CD54HCT257, CD74HCT257 High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs [ /Title (CD74 HC257 , CD74 HCT25 7) /Subject (High Speed CMOS Logic Quad 2-Input Multiplexer Features • Buffered Inputs • Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15pF, TA = 25oC • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . .