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參數(shù)資料
| 型號： | MAX4670ETJ+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PROT SWITCH T1/E1/J1 32-TQFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 系列： | * |
| 類型： | * |
| 應用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 32-TQFN-EP（5x5） |
| 包裝： | 帶卷 (TR) |
In a switching-card architecture, a common switching
card contains all the protection switches for the T1/E1/J1
lines entering the system (see Figures 7 and 8).
With an adjacent card architecture, the switches pro-
tecting any given line card reside physically in the adja-
cent line card (see Figures 9 and 10).
Receive and transmit interfaces reside in the same
board for each T1/E1/J1 port. The diagrams represent
the typical interface transformers and resistors recom-
mended for Dallas/Maxim LIUs, such as the DS21Q55.
The protection switches are placed in the low-voltage
side of the transformer to meet the isolation require-
ments. Note that there is also a TVS in the line side of
the transformers. The receive and transmit resistors pro-
vide impedance matching to the T1/E1/J1 transmission
cable characteristic impedance. Refer to Application
Note 2857 for more information on T1/E1/J1 applications.
MAX4670
Integrated T1/E1/J1 Short-Haul and
Long-Haul Protection Switch
_______________________________________________________________________________________
9
MAX4670
NO1
RX
NC1
COM1
NO2
RX
NC2
COM2
INA
INB
INC
IND
NO3
TX
NC3
COM3
NO4
TX
NC4
COM4
NO5
TX
NC5
COM5
NO6
TX
NC6
COM6
NO7
RX
NC7
COM7
NO8
RX
NC8
COM8
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
V+
GND
SWITCH
INA
NC1/NC2 NO1/NO2
LOW
X
OFF
ON
HIGH
LOW
OFF
ON
HIGH
ON
OFF
INB
NC3/NC4 NO3/NO4
LOW
X
OFF
ON
HIGH
LOW
OFF
ON
HIGH
ON
OFF
INC
NC5/NC6 NO5/NO6
LOW
X
OFF
ON
HIGH
LOW
OFF
ON
HIGH
ON
OFF
IND
NC7/NC8 NO7/NO8
LOW
X
OFF
ON
HIGH
LOW
OFF
ON
HIGH
ON
OFF
SWITCH
Figure 1. Functional Diagram
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