SN74LS257BML2 查看數據表（PDF） - ON Semiconductor

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SN74LS257BML2

Quad 2-Input Multiplexer with 3-State Outputs

ON Semiconductor 

SN74LS257B SN74LS258B

CONNECTION DIAGRAM DIP (TOP VIEW)

VCC E0 I0c I1c Zc I0d I1d Zd

16 15 14 13 12 11 10 9

SN74LS257B

VCC = PIN 16

GND = PIN 8

1 2 3 4 56 78

S I0a I1a Za I0b I1b Zb GND

VCC E0 I0c I1c Zc I0d I1d Zd

16 15 14 13 12 11 10 9

SN74LS258B

NOTE:

The Flatpak version has the same

pinouts (Connection Diagram) as

the Dual In-Line Package.

1 2 3 4 56 78

S I0a I1a Za I0b I1b Zb GND

http://onsemi.com

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