參數(shù)資料
型號: XRT5897
廠商: Exar Corporation
英文描述: Seven-Channel E1 Line Interface (3.3V or 5.0V)(七通道E1 3.3V線接口單元)
中文描述: 七通道E1線路接口(3.3V或5.0V),(七通道素E1 3.3線接口單元)
文件頁數(shù): 9/20頁
文件大?。?/td> 959K
代理商: XRT5897
XRT5897
9
Rev. 1.10
Disabling Output Drivers
Output drivers may be individually disabled (hi-z output) by either of the following methods.
1. Either connect the transmit data inputs TXPOS
andTXNEG forthe channeltobe disabledtoa log-
ic 1 source (V
CC
), or allow them to float (inputs
have internal pull--up resistors).
2. Connect TXCLK for the channel to be disabled to
logic 0 source (Ground), andalsoapply data tothe
TXPOS and TXNEG inputs of that channel.
TRANSFORMER REQUIREMENTS
Turns Ratio
Line Impedance
1:2 CT
75
or 120
Table 1. Input Transformer Requirements
Turns Ratio
Line Impedance
1:2
75
or 120
Table 2. Output Transformer Requirements
Note:
The same type 1:2 CT ratio device may be used at both receiver input and transmitter output.
The following transformers have been tested with the XRT5897:
HALO type TG26-1205(package contains two 1 CT:2 CT ratio transformers)
Pulse type PE-65535 (1:2 CT ratio)
TranspowerTechnologies type TTI7154-R (1:2 CT ratio)
Magnetic Supplier Information:
HALO Electronics, Inc.
P.O. Box 5826
Redwood City, CA 94063
Tel. (415) 568-5800
Fax. (415)568-6161
Pulse
Telecom Product Group
P.O. Box 12235
San Diego, CA 92112
Tel. (619) 674-8100
Fax. (619) 674-8262
Transpower Technologies, Inc.
24 Highway 28, Suite 202
Crystal Bay, NV 89402--0187
Tel. (702) 831--0140
Fax. (702) 831--3521
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