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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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CX28331/CX28332/CX28333  
1.0 Pin Description  
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit  
1.1 Pin Assignments  
Table 1-1. CX2833i-1x Pin Definitions (5 of 6)  
Pin #  
Signal Name  
Description  
I/O/P  
Notes  
CX28331-1x CX28332-1x CX28333-1x  
46  
70  
31  
70  
46  
REQH  
REQH1  
REQH2  
Ch1 Receive High EQ  
Gain Enable  
I
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  
Ch2 Receive High EQ  
Gain Enable  
31  
REQH3  
Ch3 Receive High EQ  
Gain Enable  
I
high-frequency gain and should use  
the low EQ gain setting.  
REQH = 1 high EQ gain  
(DS3/STS-1 modes)  
REQH = 0 low EQ gain (E3/DS3  
Square Modes)  
Power/Ground  
12  
9
4
4
TVDD  
TVDD1  
TVDD2  
TVDD3  
TVSS  
TX power Ch1  
P
Power pins for transmit circuitry  
per channel (3.3 V).  
20  
1
12  
20  
1
TX power Ch2  
TX power Ch3  
TX ground Ch1  
P
P
P
Ground pins for transmit circuitry  
per channel.  
13  
16  
60  
TVSS1  
TVSS2  
TVSS3  
RVDD  
RVDD1  
RVDD2  
RVDD3  
RVSS  
17  
5
9
TX ground Ch2  
TX ground Ch3  
RX power Ch1  
P
P
P
17  
5
Power pins for receive circuitry per  
channel (3.3 V).  
21  
8
13  
21  
8
RX power Ch2  
RX power Ch3  
RX ground Ch1  
P
P
P
Connect to 3.3 V power.  
Ground pins for receive circuitry  
per channel.  
RVSS1  
RVSS2  
RVSS3  
DVDDC  
24  
60  
16  
24  
60  
RX ground Ch2  
RX ground Ch3  
Digital core power  
P
P
P
Connect to ground.  
Digital core power for all channels  
(3.3 V).  
41  
79  
41  
79  
41  
79  
DVSSC  
VGG  
Digital core ground  
5 V/3.3 V ESD pin (1)  
P
P
Digital core ground for all channels.  
5 V supply for 5 V-tolerant, digital  
pad ESD diodes. No static power is  
drawn from pin.  
73  
28  
73  
28  
73  
28  
DVDDIO  
DVSSIO  
Digital I/O power  
Digital ground  
P
P
Connect to 3.3 V digital power.  
Digital ground.  
100985A  
Conexant  
1-9  
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