MC54HC4353 Motorola, MC54HC4353 Datasheet - Page 10

• Manufacturer Part Number: MC54HC4353
• Description: (MC54HC4351 / MC54HC4353) Analog Multiplexers/Demultiplexers with Address Latch
• Manufacturer: Motorola

MOTOROLA
V CC or GND logic levels. V CC being recognized as a logic
high and GND being recognized as a logic low. In this
example:
the supply voltages V CC and V EE . The positive peak analog
voltage should not exceed V CC . Similarly, the negative peak
analog voltage should not go below V EE . In this example, the
difference between V CC and V EE is ten volts. Therefore, us-
ing the configuration in Figure 16, a maximum analog signal
of ten volts peak–to–peak can be controlled. Unused analog
inputs/outputs may be left floating (i.e., not connected). How-
+ 5 V
– 5 V
MC54/74HC4351 MC54/74HC4353
+ 5 V
V EE
The Channel Select and Enable control pins should be at
The maximum analog voltage swings are determined by
APPLICATIONS INFORMATION
+ 5 V
– 5 V
Figure 16. Application Example
V CC
V EE
ANALOG
a. Using Pull–Up Resistors
SIGNAL
ANALOG
SIGNAL
V CC = + 5 V = logic high
GND = 0 V = logic low
7
8
9
10
7
8
9
10
ON/OFF
ON
15
13
12
20
11
20
15
13
12
11
+ 5 V
ANALOG
* 2 k R 10 k
SIGNAL
*
ANALOG
SIGNAL
Figure 18. Interfacing LSTTL/NMOS to CMOS Inputs
+5 V
R
TO EXTERNAL CMOS
0 TO 5 V DIGITAL
R
+ 5 V
CIRCUITRY
SIGNALS
R
R
LSTTL/NMOS
CIRCUITRY
+ 5 V
– 5 V
+ 5 V
V EE
10
+ 5 V
ever, tying unused analog inputs and outputs to V CC or GND
through a low value resistor helps minimize crosstalk and
feedthrough noise that may be picked up by an unused
switch.
ment. The only constraints on the power supplies are that:
anticipated on the analog channels, external Germanium or
Schottky diodes (D x ) are recommended as shown in
Figure 17. These diodes should be able to absorb the maxi-
mum anticipated current surges during clipping.
V EE
Although used here, balanced supplies are not a require-
When voltage transients above V CC and/or below V EE are
V CC
V EE
ANALOG
SIGNAL
Figure 17. External Germanium or
V EE – GND = 0 to – 6 volts
V CC – V EE = 2 to 12 volts
V CC – GND = 2 to 6 volts
D x
D x
V EE
Schottky Clipping Diodes
and V EE
b. Using HCT Interface
V CC
V EE
7
8
9
10
ON/OFF
9
10
ON/OFF
20
15
13
12
v
11
High–Speed CMOS Logic Data
GND
ANALOG
SIGNAL
V CC
20
BUFFER
+ 5 V
HCT
DL129 — Rev 6
V CC
V EE
LSTTL/NMOS
D x
D x
CIRCUITRY
+ 5 V
V EE
+ 5 V