MX014 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
Manufacturer
MX014 Datasheet PDF : 12 Pages
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Voice Band Inverter
5
3. External Components
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
X1
R1
C1
TX Channel
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
Bias
R11 R12 Bias
R9
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
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