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CX28333-1X 参数 Datasheet PDF下载

CX28333-1X图片预览
型号: CX28333-1X
PDF下载: 下载PDF文件 查看货源
内容描述: 单/双/三E3 / DS3 / STS - 1线路接口单元 [Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit]
分类和应用: 电信集成电路PC
文件页数/大小: 68 页 / 549 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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1.0 Pin Description  
CX28331/CX28332/CX28333  
1.1 Pin Assignments  
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit  
Table 1-2. CX2833i-3x Pin Definitions (5 of 8)  
Pin #  
Signal Name  
Description  
I/O/P  
Notes  
CX28331-3x CX28332-3x CX28333-3x  
71  
93  
32  
93  
71  
LLOOP  
LLOOP1  
LLOOP2  
Local loopback  
enable Ch1  
I
Local loopback enable per channel. The  
transmit data is looped back immediately  
from the encoder to the decoder in place of  
the received data.  
Local loopback  
enable Ch2  
I
I
I
1 = local loopback enabled  
0 = local loopback disabled  
32  
LLOOP3  
Local loopback  
enable Ch3  
72  
RLOOP  
Remote  
loopback enable  
Ch1  
Remote loopback enable per channel. The  
receive data, retimed after clock recovery, is  
looped back into the AMI generator in place  
of the transmit data.  
94  
94  
RLOOP1  
31  
72  
31  
RLOOP2  
RLOOP3  
Remote  
loopback enable  
Ch2  
I
I
I
1 = remote loopback enabled  
0 = remote loopback disabled  
Remote  
loopback enable  
Ch3  
56  
90  
35  
90  
56  
XOE  
XOE1  
XOE2  
Transmit output  
enable Ch1  
Transmit output enable per channel.  
1 = transmit line output driver enabled  
0 = transmit output driver set to high  
impedance state  
Transmit output  
enable Ch2  
I
I
I
35  
XOE3  
Transmit output  
enable Ch3  
57  
REQH  
Ch1 Receive  
High EQ Gain  
Enable  
The equalizer in the CX2833i has two gain  
settings. The higher gain setting is designed  
to optimally equalize a nominally-shaped  
(meets the pulse template), pulse-driven  
DS3 or STS-1 waveform that is driven  
through 0900 feet of cable.  
Square-shaped pulses such as E3 or  
DS3-HIGH require less high-frequency gain  
and should use the low EQ gain setting.  
89  
89  
REQH1  
36  
57  
REQH2  
Ch2 Receive  
High EQ Gain  
Enable  
I
I
36  
REQH3  
Ch3 Receive  
High EQ Gain  
Enable  
REQH = 1 high EQ gain (DS3/STS-1 modes)  
REQH = 0 low EQ gain (E3/DS3  
Square Modes)  
Power/Ground  
15  
5
5
TVDD  
TVDD1  
TVDD2  
TVDD3  
TX power Ch1  
P
Power pins for transmit circuitry per  
channel (3.3 V).  
25  
15  
25  
TX power Ch2  
TX power Ch3  
P
P
1-18  
Conexant  
100985A  
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