MC74LVXT4051

http://onsemi.com

11

APPLICATIONS INFORMATION

The Channel Select and Enable control pins should be at

high and GND being recognized as a logic low. In this

example:

)5 V = logic high

GND = 0 V = logic low

The maximum analog voltage swing is determined by the

using the configuration of Figure 21, a maximum analog

signal of five volts peak–to–peak can be controlled. Unused

analog inputs/outputs may be left floating (i.e., not

connected). However, tying unused analog inputs and

minimize crosstalk and feedthrough noise that may be

picked up by an unused switch.

Although used here, balanced supplies are not a

requirement. The only constraints on the power supplies are

that:

*6 volts

v GND

anticipated on the analog channels, external Germanium or

Figure 22. These diodes should be able to absorb the

maximum anticipated current surges during clipping.

ANALOG

SIGNAL

Figure 20. Application Example

ON

6

7

8

16

ANALOG

SIGNAL

)3.0 V

*3.0 V

11

10

9

TO EXTERNAL CMOS

CIRCUITRY 0 to 3.0 V

DIGITAL SIGNALS

Figure 21. Application Example

ANALOG

SIGNAL

ON

6

7

8

16

)5 V

ANALOG

SIGNAL

)5 V

GND

)5 V

GND

11

10

9

TO EXTERNAL CMOS

CIRCUITRY 0 to 5 V

DIGITAL SIGNALS

ON/OFF

7

8

16

Figure 22. External Germanium or Schottky Clipping Diodes

*3.0 V

)3.0 V

*3.0 V

)3.0 V