參數(shù)資料
型號: L80227
廠商: LSI CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: 10BASE-T/100BASE-TX Ethernet Physical Layer Device (PHY)(10BASE-T/100BASE-TX 以太網(wǎng)物理層處理器)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封裝: LQFP-64
文件頁數(shù): 139/158頁
文件大?。?/td> 1084K
代理商: L80227
Draft 6/5/00
TP Transmit Interface
A-5
Copyright 1999 by LSI Logic Corporation. All rights reserved.
A.2 TP Transmit Interface
The interface between the TP outputs on TPO
±
and the twisted pair
cable is typically transformer coupled and terminated with the two
resistors as shown in
Figure A.1
through
Figure A.3
.
The transformer for the transmitter should have a winding ratio of 1:1 with
a center tap on the primary winding tied to V
DD
, as shown in
Figure A.1
through
Figure A.3
. The specifications for the transformer are shown in
Table A.1
. Sources for the transformer are listed in
Table A.2
.
The transmit output must be terminated with two external termination
resistors to meet the output impedance and return loss requirements of
IEEE 802.3. These two external resistors must be connected between
Table A.1
TP Transformer Specification
Parameter
Specification
Transmit
Receive
Turns Ratio
1:1 CT
1:1
Inductance, ( HMin)
350
350
Leakage Inductance, ( H)
0.05–0.15
0.0–0.2
Capacitance (pF Max)
15
15
DC Resistance (
Max)
0.4
0.4
Table A.2
TP Transformer Sources
1
1. H1089, S558-5999-46, EPF8017GH and TG22-3506ND are pin compatible.
Please contact the transformer vendor for additional information.
Vendor
Part Number
PULSE
H1089, H1102
BEL
S558-5999-J9, 558-5999-46
HALO
TG22-3506ND TG110-S050N2
PCA
EPF8017GH
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