74F257ASCX 查看數據表（PDF） - Fairchild Semiconductor

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74F257ASCX

Quad 2-Input Multiplexer with 3-STATE Outputs

Fairchild Semiconductor 

April 1988

Revised September 2000

74F257A

Quad 2-Input Multiplexer with 3-STATE Outputs

General Description

The 74F257A is a quad 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 (non-inverted) form. The

outputs may be switched to a high impedance state with a

HIGH on the common Output Enable (OE) input, allowing

the outputs to interface directly with bus-oriented systems.

Features

s Multiplexer expansion by tying outputs together

s Non-inverting 3-STATE outputs

s Input clamp diodes limit high-speed termination effects

Ordering Code:

Order Number Package Number

Package Description

74F257ASC

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

74F257ASJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74F257APC

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbols

Connection Diagram

IEEE/IEC

© 2000 Fairchild Semiconductor Corporation DS009507

www.fairchildsemi.com

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