CMX602B Ver la hoja de datos (PDF) - MX-COM Inc
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CMX602B Datasheet PDF : 22 Pages
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Calling Line Identifier plus Call Waiting (Type II)
5
3. External Components
CMX602B PRELIMINARY INFORMATION
C1
XTAL
1
16 VDD
VDD
A
Line
B
Line
Protection
Network
C3 R3
D1-D4
C4 R4
R1
R2
X1 XTAL
2
15
C2
RD 3
14
VDD R5
RT 4
13
C5
AMPOUT CMX602B
5
12
C8
RXD
RXCLK
DET
R11
IRQ
C6 R6
R8 IN- 6
11 ZP
C7 R7
IN+ 7
R9
R10 VSS 8
10 MODE
9 VBIAS C9
Note: It is recommended that the printed circuit board provide a ground plane in the CMX602B area to
provide a low impedance ground connection to the VSS pin and to the bypass capacitors C8 and C9.
Figure 2 : Recommended External Components for Bellcore and/or British Telecom Application
R1
R2
Note 1
R3, R4
R5, R6
R7
R8
Note 2, 3
R9
Note 2
R10
470kΩ
470kΩ
470kΩ @ 3.3V
680kΩ @ 5.0V
240kΩ @ 3.3V
200kΩ @ 5.0V
160kΩ
±1%
±1%
±1%
±1%
±1%
±1%
R11
C1, C2
C3, C4
C5
C6, C7
C8,C9
100kΩ
18pF
0.1µF
0.33µF
680pF
0.1µF
±20%
±20%
±20%
±20%
±20%
±20%
X1
Note 4 3.579545MHz ±0.1%
D1 - D4
1N4004
Table 2: Recommended External Components
Recommended External Component Notes:
1. See Section 4.8
2. See Section 4.2
3. The recommended values of R8 were selected for applications in both Bellcore and British Telecom
Systems. Optimum Bellcore-only operation may be achieved by reducing the value of R8 e.g. to 656kΩ
@ 5.0V.
4. 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.
5. It is recommended that the printed circuit board be laid out with a ground plane in the CMX602B area to
provide a low impedance ground connection to the VSS pin and to decoupling capacitors C8 and C9.
2000 MX-COM, Inc
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480204.002
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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