MC74VHC4066D MOTOROLA [Motorola, Inc], MC74VHC4066D Datasheet - Page 8

• Manufacturer Part Number: MC74VHC4066D
• Description: Quad Analog Switch/Multiplexer/Demultiplexer
• Manufacturer: MOTOROLA [Motorola, Inc]

MC74VHC4066
levels, V CC being recognized as logic high and GND 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 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
+ 12 V
MOTOROLA
The ON/OFF Control pins should be at V CC or GND logic
The maximum analog voltage swings are determined by
0 V
APPLICATION INFORMATION
ANALOG I/O
Figure 16. 12 V Application
SELECTED
CONTROL
INPUT
7
ON
14
– 10
– 20
– 30
– 40
– 50
– 60
– 70
– 80
– 90
ANALOG O/I
0
V CC = 12 V
1.0
OTHER CONTROL
Figure 15. Plot, Harmonic Distortion
(V CC OR GND)
INPUTS
FUNDAMENTAL FREQUENCY
+ 12 V
0 V
FREQUENCY (kHz)
8
2.0
below, the difference between V CC and GND is twelve volts.
Therefore, using the configuration in Figure 16, a maximum
analog signal of twelve volts peak–to–peak can be con-
trolled.
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
MO
MO
DC protection with no inherent wear out mechanism.
When voltage transients above V CC and/or below GND


sorbs are fast turn–on devices ideally suited for precise
sorbs (Motorola high current surge protectors).
Figure 17. Transient Suppressor Application
DEVICE
SOURCE
V CC
D x
D x
V CC
3.0
SELECTED
CONTROL
INPUT
7
VHC Data – Advanced CMOS Logic
ON
16
V CC
OTHER CONTROL
(V CC OR GND)
DL203 — Rev 2
INPUTS
D x
D x