Low Voltage CTCSS Encoder/Decoder
12
MX465
5.1.2 Operating Limits
Correct operation of the device outside these limits is not implied.
Min.
Max.
5.5
Units
V
Supply (V -V
)
2.7
4.0
-40
DD SS
Xtal Frequency
Operating Temperature
4.0
85
MHz
°C
5.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
= 3.3V / 5.0V at T = 25°C, V = 0V,
V
DD
AMB
SS
Xtal Frequency = 4.0 MHz, 100ppm max.
(Over the life of the XTAL the operating range may vary from 100ppm up to 1000ppm)
0dB ref. = 750mV (proportional to V ; see note 17)
RMS
DD
Composite Signal:
1kHz test tone = 300mV , f0 CTCSS tone = 30 mV
RMS
Gaussian)
, 75mV
Noise (band limited to 6kHz
RMS
RMS
Notes
Min.
Typ.
Max.
Units
Static Values
Supply voltage
Supply current
2.7
3.3/5.0
5.5
V
V
V
= 5.0V
= 3.3V
3.7
1.3
550
400
40
4.2
1.6
mA
mA
kꢁ
ꢁ
DD
DD
Analog input impedance
Analog output impedance
Digital Input impedance
Input logic 1
18
18
480
25
1000
1,18
kꢁ
V
1
1
2
2
70%V
DD
Input logic 0
30%V
20%V
V
DD
DD
Output Logic 1 source = 0.1mA
Output Logic 0 sink = 0.1mA
Dynamic Values
80%V
V
DD
V
Speech filter
Total harmonic distortion
5,8,19
8,18
1.0
0.5
1.5
1.0
%
Output noise level (input AC short
circuit, audio switch enabled)
mV
RMS
Sinad
8,9
18
40
33
50
dB
Spurious emissions
Cutoff frequency
Bandpass ripple
Stopband attenuation <250Hz
Passband gain 1kHz
TX/RX isolation
- 48
1.8
0.5
dB
Hz
dB
dB
dB
dB
300
1
8
7,8,19
36
0
- 0.5
5
60
©1998 MX•COM, INC.
4800 Bethania Station Road, winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. #20480143.008
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