CMX264D5 View Datasheet(PDF) - CML Microcircuits
Part Name
Description
MFG CO.
'CMX264D5' PDF : 25 Pages View PDF
Frequency Domain Split Band Scrambler
CMX264
Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.433619MHz, Noise Bandwidth = 25kHz.
VDD = 3.0V, Tamb = - 40°C to +85°C.
Input Signal 0dB = 250mV (Tx Channel), 100mV (Rx Channel) @1kHz, scramble mode selected.
Neither pre nor de-emphasis enabled.
Typical radio channel filtering employed between transmitting (scrambling) and receiving
(descrambling) device (such as shown in Figure 8).
DC Parameters
VDD
IDD (powersaved)
IDD (not powersaved)
AC Parameters
Tx Channel
Audio In (MICIN)
Input Impedance
Signal Level
Audio Baseband Signal Lower 3dB Point
Audio Baseband Signal Upper 3dB Point
Scrambled Audio Out (MICO)
Scrambled Spectrum Lower 3dB Point
Scrambled Spectrum Upper 3db Point
Scrambled Spectrum Signal Level at
4000Hz
Tx Channel Passband Gain
Output Impedance (output active)
Output Impedance (output not active)
Any Spurious Output
Noise and Distortion
Rx Channel
Scrambled Audio In (RXIN)
Input Impedance
Signal Level
Audio Out (RECO or EXTO)
Recovered Spectrum Lower 3dB Point
Recovered Spectrum Upper 3dB Point
Rx Channel Passband Gain
Output Impedance (output active)
Output Impedance (output not active)
Any Spurious Output
Noise and Distortion
Notes Min.
2.7
1
1
100
2
2
2,3
2,3,4
2,3,4
2,3,4,5
6
6
300
7,8,9
7,9,10
100
2,11
2,11
2,11,12
6
6
300
7,8
7,10
Typ.
3.0
250
230
2700
230
3200
-26.0
-1.0
1.0
500
250
230
2700
-2.0
1.0
500
Max.
Units
3.3
V
0.3
mA
mA
1000
2.5
-40.0
2.0
kΩ
mVrms
Hz
Hz
Hz
Hz
dB
dB
kΩ
kΩ
dB
%
1000
2.5
-30.0
4.0
kΩ
mVrms
Hz
Hz
dB
kΩ
kΩ
dB
%
© 1999 Consumer Microcircuits Limited
15
D/CMX264/1
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