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參數(shù)資料
| 型號： | XRT59L91IDTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU E1 SGL 3.3V 16SOIC |
| 產(chǎn)品變化通告： | Packaging Change 15/Jul/2010 |
| 標準包裝： | 1,000 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | E1 |
| 電源電壓： | 3.13 V ~ 3.46 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 16-SOIC |
| 包裝： | 帶卷 (TR) |
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XRT59L91
19
Rev. 1.0.0
The user can configure the XRT59L91 device to oper-
ate in the “Local Loop-back” Mode, by pulling the
“LLoop” input pin (pin 4) to VDD.
3.2
The Remote Loop Back Mode
When the XRT59L91 device is configured to operate in
the “Remote Loop-back” Mode, the XRT59L91 device
will ignore any signals that are input to the TxPOS and
TxNEG input pins. The XRT59L91 device will receive
the incoming line signals, via the RTIP and RRing input
pins. This data will be processed through the entire
Receive Section (within the XRT59L91) and will output
to the “Receive Terminal Equipment” via the
R em o te Loop B a ck
Path
T ransm it In put
In terface
T ransm it In put
In terface
Pulse Shaping
Circuit
Pulse Shaping
Circuit
Receive
E q ualize r
Receive
E q ualize r
P e ak D ete ctor/
S licer
P e ak D ete ctor/
S licer
Receive O utpu t
In terface
Receive O utpu t
In terface
LO S
Detector
LO S
Detector
Lo cal
Lo op B ack
MU X
Lo cal
Lo op B ack
MU X
Remo te
Lo op B ack
MU X
Remo te
Lo op B ack
MU X
TTIP
TR ing
TxP O S
TxN E G
RT IP
RR ing
R Loop
LL oop
RxP O S
RxN E G
RxLO S
TxC lk
“RxPOS” and “RxNEG” output pins. Additionally, this
data will also be internally looped back to the “Transmit
Input Interface” block within the “Transmit Section”. At
this point, this data will be routed through the remainder
of the “Transmit Section” of the XRT59L91 device and
will be transmitted out onto the line via the “TTIP” and
“TRing” output pins.
Figure 13, illustrates the path that the data takes
(within the XRT59L91 device) when the chip is config-
ured to operate in the “Remote Loop-back” Mode.
Figure 13. Illustration of the “Remote Loop-back” path, within the XRT59L91 Device
It should be noted that during “Remote Loop-back”
operation, any data which is input via the RTIP and
RRING input pins, will also be output to the Terminal
Equipment, via the RxPOS and RxNEG output pins.
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