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2

Unit Loading/Fan Out

Functional Description

The 74F350 is operationally equivalent to a 4-input multi-

plexer with the inputs connected so that the select code

causes successive one-bit shifts of the data word. This

internal connection makes it possible to perform shifts of 0,

1, 2 or 3 places on words of any length.

shifted according to the code applied to the select inputs

active LOW output enable (OE). When OE is LOW, data

outputs will follow selected data inputs; when HIGH, the

data outputs will be forced to the high impedance state.

This feature allows shifters to be cascaded on the same

output lines or to a common bus. The shift function can be

logical, with zeros pulled in at either or both ends of the

shifting field; arithmetic, where the sign bit is repeated dur-

ing a shift down; or end around, where the data word forms

a continuous loop.

Logic Equations

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

Pin Names

Description

U.L.

HIGH/LOW

Select Inputs

1.0/2.0

20

µA/−1.2 mA

Data Inputs

1.0/2.0

20

µA/−1.2 mA

OE

Output Enable Input (Active LOW)

1.0/2.0

20

µA/−1.2 mA

3-STATE Outputs

150/40 (33.3)

−3 mA/24 mA (20 mA)