MC74LVXT4066_05 Datasheet, PDF (9/12 Pages) ON Semiconductor – Quad Analog Switch/Multiplexer/Demultiplexer High−Performance Silicon−Gate CMOS

MC74LVXT4066
0
−10
FUNDAMENTAL FREQUENCY
−20
−30
−40
−50
DEVICE
−60
SOURCE
−70
−80
−90
1.0
2.0
3.0
FREQUENCY (kHz)
Figure 15. Plot, Harmonic Distortion
APPLICATION INFORMATION
The ON/OFF Control pins should be at V_IH or V_IL logic
levels, V_IH being recognized as logic high and V_IL being
recognized as a logic low. Unused analog inputs/outputs
may be left floating (not connected). However, it is
advisable to tie unused analog inputs and outputs to V_CC or
GND through a low value resistor. This minimizes crosstalk
and feedthrough noise that may be picked−up by the unused
I/O pins.
The maximum analog voltage swings are determined by
the supply voltages V_CC and GND. The positive peak analog
voltage should not exceed V_CC. Similarly, the negative peak
analog voltage should not go below GND. In the example
below, the difference between V_CC and GND is six volts.
Therefore, using the configuration in Figure 16, a maximum
analog signal of six volts peak−to−peak can be controlled.
When voltage transients above V_CC and/or below GND
are anticipated on the analog channels, external diodes (Dx)
are recommended as shown in Figure 17. These diodes
should be small signal, fast turn−on types able to absorb the
maximum anticipated current surges during clipping. An
alternate method would be to replace the Dx diodes with
Mosorbs (Mosorb™ is an acronym for high current surge
protectors). Mosorbs are fast turn−on devices ideally suited
for precise DC protection with no inherent wear out
mechanism.
+ 6.0 V
0V
ANALOG I/O
V_CC = 6.0 V
14
ANALOG O/I
ON
+ 6.0 V
0V
V_IH
SELECTED
CONTROL
INPUT
7
OTHER CONTROL
INPUTS
(V_IH OR V_IL)
V_CC
D_x
D_x
V_CC
16
D_x
ON
D_x
V_IH
SELECTED
CONTROL
INPUT
OTHER CONTROL
INPUTS
7
(V_IH OR V_IL)
Figure 16. 6.0 V Application
Figure 17. Transient Suppressor Application
http://onsemi.com
9