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74ACT257 - Quad 2-Input Multiplexer

Download the 74ACT257 datasheet PDF. This datasheet also covers the 74AC257 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 AC/ACT257 is a quad 2-input multiplexer with 3STATE outputs.

Four bits of data from two sources can be selected using a Common Data Select input.

The four outputs present the selected data in true (noninverted) form.

Key Features

  • s ICC and IOZ reduced by 50% s Multiplexer expansion by tying outputs together s Noninverting 3-STATE outputs s Outputs source/sink 24 mA s ACT257 has TTL-compatible inputs Ordering Code: Order Number Package Number Package.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74AC257_FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
74ACT257 QUAD 2 CHANNEL MULTIPLEXER STMicroelectronics
74ACT253 Dual 4-Input Multiplexer National Semiconductor
74ACT259 8-Bit Addressable Latch ETC
74ACT20 DUAL 4-INPUT NAND GATE STMicroelectronics
74ACT240 OCTAL BUS BUFFER STMicroelectronics

Other Datasheets by Fairchild (now onsemi)

Part Number Description
74ACT251 8-Input Multiplexer
74ACT253 Dual 4-Input Multiplexer
74ACT258 Quad 2-Input Multiplexer
74ACT240 Octal Buffer/Line Driver
74ACT241 Octal Buffer/Line Driver

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
74AC257 • 74ACT257 Quad 2-Input Multiplexer with 3-STATE Outputs November 1988 Revised November 1999 74AC257 • 74ACT257 Quad 2-Input Multiplexer with 3-STATE Outputs General Description The AC/ACT257 is a quad 2-input multiplexer with 3STATE outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.