EL4421C22C41C42C43C44C

Multiplexed-Input Video Amplifiers

Applications Information

Contd

Switching Characteristics

The logic inputs work with standard TTL levels

of 08V or less for a logic 0 and 20V or more for a

logic 1 making them compatible for TTL and

CMOS drivers

The ground pin is the logic

threshold biasing reference The simplified input

circuitry is shown below

4421 35

Figure 1 Simplified Logic Input Circuitry

The ground pin draws a maximum DC current of

6

mA and may be biased anywhere between

(V

35V The logic inputs

may range from (V

ditionally required to be no more negative than

V(Gnd pin)

4V and no more positive than

For example within these constraints we can

out a negative supply by using these connections

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Figure 2 Using the EL44XX Mux Amps with a5V and a12V Supplies

10