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參數(shù)資料
| 型號： | XRT5897IV-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU E1 7CH 3.3V 100TQFP |
| 產(chǎn)品變化通告： | Product Discontinuation 18/Jan/2012 |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 7/7 |
| 規(guī)程： | E1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-LQFP |
| 供應(yīng)商設(shè)備封裝： | 100-TQFP（14x14） |
| 包裝： | 托盤 |
XRT5897
2
Rev. 1.11
BLOCK DIAGRAM
Figure 1. XRT5897 Block Diagram
RTIP7 (69)
RXPOS7 (5)
RRING7 (68)
TXCLK7 (87)
TTIP7 (89)
TRING7 (91)
LOSSEL (38)
LOSCNT (73)
RXNEG7 (6)
LOS7 (4)
TXPOS7 (85)
TXNEG7 (86)
Singnal
Peak
LOS
Detect
Loss
Delay
MUX
O
Pulse
Shaping
NRZ
To
Duty
Cycle
MUX
0
2:1
1:2
R1
RING
TIP
RX INPUT
TIP
TX OUTPUT
Receive
Comparators
Line
Drivers
R2
R3
9.1
R4
9.1
Tranceiver 7
Detector
Counter
1
RZ
Adjust
0
1
Transmit
Tranceiver 6
Tranceiver 5
Tranceiver 4
Tranceiver 3
Tranceiver 2
Tranceiver 1
VCC
Receiver Notes
D
The same type 1:2CT ratio transformer may be
used at the receiver input and transmitter output.
D
R1 and R2 are both 150W for 75W operation, or
240W for 120W operation.
D
Return loss exceeds ITU G.703 specification with
these resistors and a 1:2CT ratio input transformer.
LOS (Loss of Signal) Notes
D
LOSSEL (pin 38) is connected to logic “1” for ITU
G.775 compliant LOS delay, or to logic 0 for user
programmable additional delay.
D
LOSCNT (pin 73) is unconnected when LOSSEL is
logic 1, or connected to an external clock when
LOSSEL is logic 0.
Transmitter Notes
D
Return loss exceeds ETSI 300 166 specification
with a 1:2 ratio transformer.
D
R3 and R4 are always 9.1W for both 75W and 120W
applications.
D
An approach exists that permits the user to operate
the XRT5897 with a 5V power supply. For more
information, please see application note TAN-12.
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