參數(shù)資料
型號: RTL8309SB
廠商: Electronic Theatre Controls, Inc.
英文描述: SINGLE-CHIP 9-PORT 10/100MBPS SWITCH CONTROLLER
中文描述: 單芯片9口10/100Mbps開關(guān)控制器
文件頁數(shù): 112/115頁
文件大?。?/td> 866K
代理商: RTL8309SB
RTL8309SB
Datasheet
Single-chip 9-port 10/100Mbps Switch Controller
97
Track ID: JATR-1076-21 Rev. 1.4
Transformer Options
The RTL8309SB can use a transformer that supports auto MDIX with a 1:1 turn ratio on both transmit and receive paths.
There are many venders improving their transformer design to meet the RTL8309SB’s requirement.
Vendor
Quad
H1164
ML164
40ST1041AX
HS2275
Pulse
Magnetic 1
BothHand
Macronics
The center taps on the primary side of the transmit and receive paths in the transformer should be connected together inside the
transformer and provide one common external pin (Figure 23). This common pin should connect to 1.8V directly and connect
to ground via a 0.1
μ
F capacitor as shown in Figure 23. This schematic will force the signal on the primary side to bias at 1.8V.
RTL8309SB
1
4
3
2
5
8
7
6
RXIN
TXOP
TXON
IBREF
RXIP
Transformer
1:1
RJ-45
1:1
Chassis GND
2Κ, 1%
0.1μF
AGND
0.01μF/1KV
1%
75
1%
1%
1%
50
50
50
50
AGND
AGND
75
75
AGND
1.8V
0.1μF
0.1μF
Figure 23. Application for Transformer with Connected Central Tap
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