MC10164

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3

APPLICATION INFORMATION

The MC10164 can be used wherever data multiplexing or

parallel to serial conversion is desirable. Full parallel gating

permits equal delays through any data path. The output of

the MC10164 incorporates a buffer gate with eight data

inputs and an enable. A high level on the enable forces the

output low. The MC10164 can be connected directly to a

data bus, due to its open emitter output and output enable.

Figure 1 illustrates how a 1–of–64 line multiplexer can be

built with eight MC10164’s wire ORed at their outputs and

one MC10161 to drive the enables on each multiplexer,

without speed degradation over a single MC10164 being

experienced.

FIGURE 1 — 1–OF–64 LINE MULTIPLEXER

The Bit chosen is dependent on six–bit

code present on inputs 7, 9, 14 of the

MC10161 and the A, B, C inputs of the

MC10164.

AB C

E

MC10164

AB C

E

MC10164

AB C

E

MC10164

AB C

E

MC10164

AB C

E

MC10164

AB C

E

MC10164

AB C

E

MC10164

MC10161

AB C

MSB

LSB

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

14

9

7

E

MC10164