CMX625 查看數據表（PDF） - CML Microsystems Plc
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CMX625 Datasheet PDF : 34 Pages
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ISDN TA POTS Interface
1.4 External Components
CMX625
VDD
R6
R7
IOMTM-2
Bus
Interface
VDD
R1
FSC 1
DCL 2
DD 3
DU 4
TE/NTE 5
SA0 6
SA1 7
SA2 8
DS 9
RESET 10
IRQN 11
VSS 12
VSS
24 VDD
23 SPM
VDD
C2
22 RING
VSS
21 DAC OUT
20 TXON
C6
CMX625 19 TXN
18 TXO
R4 Tx In
C5
R5
17 TONEFSK
16 VBIAS
15 RXO
C1
R3 VSS
14 RXN
C4
13 RXP
R2
VBIAS
C3
Rx In
Figure 2 Recommended External Components
R1, R4
R2, R3
R5
R6, R7
100kΩ
110kΩ
56kΩ
Note 2
C1, C2
C3
C4, C5
C6
1.0µF
100nF
220pF
22nF
Resistor ±1%, capacitors ±5% unless otherwise stated.
Note:
1. The recommended component values, C3 to C6 and R2 to R5 and tolerances are essential to
meet the ITU-T Recommendation G.172 filter specification. See figure 12.
2. R6, R7 = 750Ω with 5V supply. R6, R7 = 470Ω with 3.3V supply.
2001 Consumer Microcircuits Limited
6
D/625/2
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