93L09DMQB datasheet(3/4 Pages) NSC

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Switching Characteristics VCC ea50V TA ea25 C

Symbol

Parameter

CL e 15 pF

Units

Min

Max

tPLH

Propagation Delay

tPHL

S0 to Za

tPLH

Propagation Delay

tPHL

S0 to Za

tPLH

Propagation Delay

tPHL

I0 to Za

tPLH

Propagation Delay

tPHL

S0 to Za

Functional Description

The 93L09 dual 4-input multiplexers are able to select two

bits of either HIGH or LOW data or control from up to four

sources in one package The 93L09 is the logical imple-

mentation of two-pole four-position switch with the position

of the switch being set by the logic levels supplied to the

two select inputs Both assertion and negation outputs are

provided for both multiplexers The logic equations for the

outputs are shown below

Za e I0a

S1 S0 a I1a S1 S0 a I2a S1 S0 a I3a S1 S0

Zb e I0b

S1 S0 a I1b S1 S0 a I2a S1 S0 a I3b S1 S0

The 93L09 is frequently used to move data from a group of

registers to a common output bus The particular register

from which the data came would be determined by the state

of the select inputs A less obvious application is as a func-

tion generator The 93L09 can generate two functions of

three variables This is useful for implementing random gat-

ing functions

Truth Table

Select

Inputs

Outputs

Inputs

(a or b)

XXX

XLX

XHX

XLX

XHX

XXX

H e HIGH voltage level

L e LOW voltage level

X e Immaterial

Logic Diagram

TLF9602 – 3

93L09DMQB Datasheet(PDF) 3 Page - National Semiconductor (TI)

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