Download the MC74AC257 datasheet PDF.
This datasheet also covers the MC74ACT257 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 MC74AC257/74ACT257 is a quad 2
input multiplexer with 3
state outputs.
It selects four bits of data from two sources under control of a Common Data Select input.
When the Select input is LOW, the I0x inputs are selected and when Select is HIGH, the I1x inputs are selected.
Full PDF Text Transcription for MC74AC257 (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
MC74AC257. For precise diagrams, and layout, please refer to the original PDF.
Quad 2-Input Multiplexer with 3-State Outputs MC74AC257, MC74ACT257 The MC74AC257/74ACT257 is a quad 2−input multiplexer with 3−state outputs. Four bits of data from two ...
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2−input multiplexer with 3−state 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. • Multiplexer Expansion by Tying Outputs Together • Noninverting 3−State Outputs • Outputs Source/Sink 24 mA • ′ACT257 Has TTL Compatible Inputs • These are Pb−Free Devices VCC OE I0c I1c Zc I0d I1d Zd 16 15 14 13 12 11 10 9 DATA SHEET www.ons
MC74AC257 Datasheet
