MX803ALH Ver la hoja de datos (PDF) - MX-COM Inc
Número de pieza
componentes Descripción
Fabricante
MX803ALH Datasheet PDF : 26 Pages
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Audio Signaling Processor
6
3. External Components
MX803A PRELIMINARY INFORMATION
XTAL
SEE INSET
BELOW XTAL/CLOCK
REPLY DATA
CS
COMMAND DATA
LOGIC INPUT
IRQ
AUDIO SWITCH IN
AUDIO SWITCH OUT
R7
VSS
VDD
1
24 VBIAS
2
23 SERIAL CLOCK
C6
3
22
4
21 SWITCHED SUM OUT R6
5
20 SUM OUT
MX803A 6
19 SUM IN
R3
7
18 CAL/CUES OUT
8
17 TONE 2 OUT
C5
TONE LEVEL
AND GAIN
R4
COMPONENTS
9
16 TONE 1 OUT
R5
10
15 VBIAS
11
14 SIGNAL BIAS
R2
12
13 RX AUDIO IN
C2
C1
INSET
XTAL 1
X1
R1
MX803A
2
C4
C3 XTAL/CLOCK
R1
1.0MΩ
R2
2.0MΩ
R3 Note 2, 3 100kΩ
R4 Note 2, 3 82.0kΩ
R5 Note 2, 3 122kΩ
R6 Note 2 100kΩ
R7 Note 2, 5 100kΩ
±10%
±10%
±10%
±10%
±10%
±10%
±10%
C1
0.1µF
C2
1.0µF
C3 Note 4 33.0pF
C4 Note 4 33.0pF
C5 Note 3 22.0pF
C6
1.0µF
X1 Note 1, 4 4.00MH
z
±20%
±20%
±20%
±20%
±20%
±20%
Figure 2: Recommended External Components
Notes:
1. Xtal/clock components described are recommended in accordance with MX-COM's Application Note on Standard and
DBS 800 Crystal Oscillator Circuits (April 1990). 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.
2. System Components whose values are calculated to allow the MX803A to operate with other DBS 800 microcircuits.
Figure 3 shows these components used in the system signal paths.
3. R3, R4, R5 and C5 are tone mixing components calculated to provide a 3dB tone differential (twist) for use in a DTMF
configuration. Single tone output levels are set independently.
4. When X1 > 5.00MHz, C3 = C4 = 18pF
5. R7 provides modulation level and matching outputs for the MX803A.
© 1996 MX•COM, INC.
Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054
Doc. # 20480122.003
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