CMX654D4 데이터 시트보기 (PDF) - MX-COM Inc
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CMX654D4 Datasheet PDF : 12 Pages
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V.23 Transmit Modulator
5
3 External Components
CMX654 PRELIMINARY INFORMATION
C1
X1
C2
XTAL 1
XTAL/CLOCK
2
From µC
M0
3
M1
4
5
N/C
6
TXOUT 7
VSS
8
VDD
16
15
14
CMX654 13
D4/P3 12
11
10
9
R1
C3
RDY
N/C
N/C
CLK
TXD
VDD
VBIAS
C4
Figure 2: External Components
R1
C1, C2
C3
C4
X1
Note 1
100k:
18pF
0.1PF
0.1PF
3.579545MHz
Resistors r5%, capacitors r10% unless otherwise stated
Table 2: External Components for Typical Application
External Components Notes:
1. A crystal frequency of 3.579545MHzr0.1% is required for correct FSK operation. For best results, a
crystal oscillator design should drive the clock inverter input with signal levels of at least 40% of VDD,
peak-peak. Tuning fork crystals generally cannot meet this requirement. To obtain crystal oscillator
design assistance, consult your crystal manufacturer. Operation of this device without a Xtal or Clock
input may cause device damage.
¤1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480186.001
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All Trademarks and Service marks are held by their respective companies.
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