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PDF MX014 Data sheet ( Hoja de datos )
| Número de pieza | MX014 | |
| Descripción | Voice Band inverter | |
| Fabricantes | CML | |
| Logotipo |  |
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DATA BULLETIN
MX014 Voice Band inverter
Features
• CTCSS Compatible
• Fixed Frequency Inversion
• Low Power CMOS
Applications
• Land Mobile Radio Systems
• Community Repeaters
TX Audio Feedback
TX Audio In
BIAS
Rx Path
6dB/Octave
Pre-emphasis
10dB Gain
RX Audio In
RX Audio Feedback
RX Path
Path Invert
Bandpass
Filter
300-3033 Hz
Filsav 1
Bandpass
Filter
300-3033 Hz
Carrier
Filsav 2
6dB/Octave
De-emphasis
Filsav 1
TX
BIAS
TX Audio Out
TX
RX Path RX Audio Out
3333 Hz
PTT
PTT
RX Audio Enable
RX Audio Enable
PTL
PTL
Privacy Enable
LOGIC
Carrier
Filsav 1
Filsav 2
RX Path
EMPSAV
TX
Path Invert
CLK
3333 Hz
CLK Generator
Clock
Clock
VDD
VSS
BIAS
The MX014 Voice Band Inverter gives the security of private voice communications to land mobile radio users, as well as
to the users of other shared radio channel systems. Designed for use in half-duplex systems, the MX014 exchanges high
and low frequencies in the voiceband and renders transmitted messages unintelligible. This privacy function is achieved
by a single frequency inversion. When used with CTCSS, PvtSQUELCHTM privacy adapter operation is achieved.
Sharp cut-off in the internal voiceband filters permits operation with CTCSS and similar sub-audio signaling schemes. This
results in high quality recovered audio.
The core of the MX014 consists of two audio band pass filters and a balanced modulator. The device uses a
programmable clock divider which controls the carrier and filter cut-off frequencies. Control of the RX/TX, PTL and
privacy function is by pin selection.
The MX014 operates from a single 5V supply and uses a 4 MHz crystal oscillator to ensure the correct pitch in recovered
speech. Signal coupling and decoupling are the only external components needed. The device is available in 24-pin
PLCC (MX014LH), 24-pin PDIP (MX014P) and 24-pin CDIP (MX014J) packages.
© 1997 MX•COM, INC.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480013.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by there respective companies.
1 page  
Voice Band Inverter
3. External Components
5
MX014
Configuration for Radios with
Existing Pre- and De-emphasis.
For Use in Radios without
Pre- and De-emphasis.
X1
1 XTAL MX014 VDD 24
2 XTAL
TXFB 23
3 PTT
TXIN 22
VDD
R1
C1
TX Channel
X1
1 XTAL MX014 VDD 24
2 XTAL
TXFB 23
3 PTT
TXIN 22
VDD
R1
C1
TX Channel
4 PTT
5 PTL
RXFB 21
RXIN 20
R2
R3
C2
RX Channel
4 PTT
5 PTL
RXFB 21
RXIN 20
R2
R3
C2
RX Channel
6 PTL
BALMOD 19
7 RXAUDEN FILTR 18
R4
C3
6 PTL
BALMOD 19
7 RXAUDEN FILTR 18
R4
C3
8 RXAUDEN BIAS 17
C4
8 RXAUDEN BIAS 17
C4
9 PRIVEN TXBIN 16
10 RXOUT DEMPOUT 15
11 TXOUT
12 VSS
RXBIN 14
BPFOUT 13
R7 R8
Bias
R5 R6
Bias
9 PRIVEN TXBIN 16
10 RXOUT DEMPOUT 15
11 TXOUT
12 VSS
RXBIN 14
BPFOUT 13
R10
R11 R12
R9
Bias
Bias
Figure 2: External Components Connections
TX Attenuation = R8
R7 + R8
For a gain of 1, R8 = ∞, R7 = 0
RX Attenuation = R6
R5 + R6
For a gain of 1, R6 = ∞, R5 = 0
TX Attenuation = R10
R9 + R10
For a gain of 1, R9 = 0, R10 = ∞
RX Attenuation = R12
R11+ R12
For a gain of 1, R11 = 0, R12 = ∞
Table 2: Gain and Attentuation Calculations
Recommended External Component Notes:
1. Component Values: C1- C3 = 0.1 µF, C4 = 1.0 µF, X1 = 4 MHz crystal
2. R1 to R12 values will depend on the configuration and the gain or attenuation required. However R1, R3, R5, R7,
and R11 should be 100 kΩ or greater. To add gain or attenuate, use R5-R12 as shown. See pin descriptions for
more information.
3. For best results, a crystal oscillator design should drive the clock inverter input with signal levels of at least 40% of
VDD, peak to peak. Tuning fork crystals generally cannot meet this requirement. To obtain crystal oscillator
design assistance, consult your crystal manufacturer.
© 1997 MX•COM, INC.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480013.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by there respective companies.
5 Page 
Voice Band Inverter
11
MX014
A
PIN1
B E1
E
Y
T
K
H
L
J J1 P
C
Package Tolerances
DIM. MIN. TYP. MAX.
A 1.200 (30.48)
1.270 (32.26)
B 0.500 (12.70)
0.555 (14.04)
C 0.151 (3.84)
0.220 (5.59)
E 0.600 (15.24)
0.670 (17.02)
E1 0.590 (14.99)
0.625 (15.88)
H 0.015 (0.38)
0.045 (1.14)
J 0.015 (0.38)
0.023 (0.58)
J1 0.040 (1.02)
0.065 (1.65)
K 0.066 (1.67)
0.074 (1.88)
L 0.121 (3.07)
0.160 (4.05)
P 0.100 (2.54)
T 0.008 (0.20)
0.015 (0.38)
Y 7°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 6: 24-pin PDIP Mechanical Outline: Order as part no. MX014P
A
B E1
E
PIN1
K
H
L
J J1 P
F
K1 C
T
Package Tolerances
DIM. MIN. TYP. MAX.
A 1.240 (31.50)
1.260 (32.00)
B 0.514 (13.06)
0.583 (14.79)
C 0.165 (4.19)
0.230 (5.84)
E 0.600 (15.23)
0.670 (17.00)
E1 0.594 (15.09)
0.615 (15.61)
F 1.100 (27.94)
H 0.02 (0.51)
J 0.018 (0.46)
J1 0.055 (1.39)
K 0.050 (1.27)
0.080 (2.03)
K1 0.074 (1.88)
0.080 (2.03)
L 0.115 (2.92)
0.200 (5.08)
P 0.10 (2.54)
T 0.0094 (0.239)
0.0106 (0.269)
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 7: 24-pin CDIP Mechanical Outline: Order as part no. MX014J
© 1997 MX•COM, INC.
www.mxcom.com Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480013.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by there respective companies.
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MX014.PDF ] | |
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