8.2 External Components Comparison
Figure 6: Comparison of External Components for Older CTCSS ICs
EXTERNAL
MX365
MX365A
MX165A
MX165B
MX165C
MX465
COMPONENTS
R1
R2
R3
X1
1M
560k
820k
1MHz
0.1uF
68pF
1M
560k
820k
1MHz
0.1uF
68pF
1M
560k
820k
1MHz
0.1uF
68pF
1M
560k
820k
1MHz
0.1uF
68pF
4.7M
560k
820k
1MHz
0.1uF
18pF
4.7M
560k
820k
4MHz
0.1uF
18pF
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
D1
33pF
33pF
33pF
33pF
33pF
33pF
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
0.1uF
0.1uF
0.47uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Small signal
Resistors ꢆ10%, Capacitors ꢆ20%, Xtal 100ppm max
Note : The values specified for R1, C2 and C3 have been found to be satisfactory when used with a
crystal (X1) whose equivalent series resistance is ꢈ to 1000 ohms. The crystal manufacturer should be
consulted to determine optimum values for different crystals.
Page 19
20480150.001 MX-COM ꢀ 1996
CMLMICRO [ CML MICROCIRCUITS ]
