MX909A データシートの表示（PDF） - CML Microsystems Plc
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MX909A Datasheet PDF : 38 Pages
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GMSK Modem Data Pump
3 External Components
Page 5 of 37
MX909A PRELIMINARY INFORMATION
VDD
IRQ
D7
1
2
24 VDD
C1
23 RXAMPOUT
R2
R1 GMSKIN
D6
3
22 RXIN
D5
D4
D3
4
21 VBIAS
5
6
MX909A 20
19
TXOUT
DOC1
R4
GMSKOUT
D2
7
18 DOC2
D1
8
17 XTAL/CLOCK
D0
9
16 XTAL
C7 C6 C5 C2
RD
10
15 A1
WR
CS
VSS
11
12
A0
14 A0
13 CS
XTAL/CLOCK
17
X1 C3
A1
R3 C4
16
XTAL
Figure 2: Recommended External Components
Component
R1
R2
R3
R4
C1
C2
C3
C4
C5
C6
C7
X1
Notes
1
2
3
3
2
4
4
3
Value
100kΩ
1MΩ
0.1 µF
0.1 µF
Tolerance
±20%
±10%
±20%
±5%
±20%
±20%
±20%
±20%
±10%
±20%
±20%
Recommended External Component Notes:
1. See section 4.1.10.
2. See section 4.1.12.
3. See section 4.4.3.
4. C6 and C7 values should satisfy the following formula:
C (Farads) = 120 x 10-6 / Data Rate (bits/second)
Data Rate (kbits/sec)
C6 / C7 (uF)
4.0 4.8
8.0
9.6
16.0
19.2
0.03 0.022 0.015 0.012 0.0068 0.0068
¤2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480134.005
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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