DSCX-V34LF-066 View Datasheet(PDF) - Conexant Systems
Part Name
Description
MFG CO.
DSCX-V34LF-066
Conexant Systems
'DSCX-V34LF-066' PDF : 82 Pages View PDF
CX86500 SCXV.xx Modem Data Sheet
3.4.1.4
General Purpose Input/Output
There is one unassigned general purpose input/output pin:
• General Purpose Input/Output 1 (GPIO1, pin 1); input/output
3.4.1.5
No Connects
Three pins are not used:
• No Connect 1 (NC1, pin 8); no internal connection
• No Connect 2 (NC2, pin 22); no internal connection
• No Connect 3 (NC3, pin 25); no internal connection
3.4.2
CX20493 LSD Pin Assignments and Signal Definitions
CX20493 LSD hardware interface signals are shown by major interface in Figure 3-7, are
shown by pin number in Figure 3-8, and are listed by pin number in Table 3-9.
CX20493 LSD hardware interface signals are defined in Table 3-10.
Figure 3-7. CX20493 LSD 28-Pin QFN Hardware Interface Signals
19
RAC2
TAC2
18
On-hook
Monitor
(Optional)
Vdd
24 DVdd
RAC1
TAC1
21
20
Ring
Filter
C978
DGND_LSD
C950
R950
PWRCLKN
R952
PWRCLKP
C952
DIB_DATAP
DIB_DATAN
R924
R926
DIGITAL
ISOLATION
BARRIER
(DIB)
POWER AND
CLOCK
CHANNEL
R990
C962
R922
DATA
CHANNEL
C922
C924
PCLK2 R932 CLK2 C926 26
BR908 CC
BR908 AC1
+-
BR908
C970
FB906
7
Vdd
2
C930
C928
6
AGND_LSD
27
28
29
15
NOTE:
AGND_LSD
23
Consult applicable reference design for exact
GND_TIE
U908
component placement and values, and for layout guidelines.
AGND_LSD DGND_LSD
EIC
TRDC
EIO
EIF
CLK
RXI
CX20493
PWR+ SmartDAA 3
Line Side
VZ
AVdd
Device
TXO
(LSD)
TXF
28-Pin QFN
AGnd
RBias
DIB_P
DIB_N
PADDLE
DC_GND
DGND
VRef
Vc
GPIO1
NC1
NC2
NC3
Electronic
11
Inductor,
12 Off-Hook,
17 Pulse Dial,
16 and TIP and
RING VI
Control
9
Receive
Coupling
10 Impedance
14 Matching
13
and
Transmitter
5
R954
AGND_LSD
4
3
C944 C974
C940
AGND_LSD
1
NC
8
NC
22 NC
25 NC
C976
Safety
and EMI
Protection
Telephone
Line
TIP
Connector RING
AGND_LSD
101701_006
3-18
Conexant
102287F
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