MSK Modem
6
MX809
3 External Components
VDD
XTAL
➤
➤
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
R2
SEE INSET
C5
WAKE
XTAL/CLOCK ➤
IRQ
➤
ADDRESS SELECT
➤
➤
SERIAL CLOCK
➤
COMMAND DATA
➤
CS
RX FREEFORMAT➤
VBIAS
➤
MX809J
AMP IN➤
REPLY DATA
TX OUT
➤
C3
AMP OUT
RX IN➤
➤
10
11
12
C4
VSS
➤
➤
INSET
XTAL
1
2
X1
R1
MX809J
XTAL/CLOCK
C1
C2
Figure 2: Recommended External Components
Component
Notes
Value
1.0Mꢂ
22.0Kꢂ
33pF
Tolerance
±10%
R1
R2
C1
C2
C3
C4
C5
X1
±10%
1
1
±20%
33pF
±20%
±20%
1.0ꢃF
±20%
0.1ꢃF
±20%
1.0ꢃF
1
4.032MHz
Table 4: Recommended External Components
Recommended External Component Notes:
1. Xtal circuit capacitors C1 (CD) and C2 (CG) shown in Inset 2 are recommended in accordance with MX-
COM’s Crystal Oscillator Application Note.
ꢀ1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480036.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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CMLMICRO [ CML MICROCIRCUITS ]
