参数资料
型号: WJLXT907ALCA4
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: ROHS COMPLIANT, LQFP-64
文件页数: 16/48页
文件大小: 621K
代理商: WJLXT907ALCA4
Intel
LXT901A/907A Universal 3.3 V Ethernet Transceiver
Datasheet
23
Document Number: 249098
Revision Number: 003
Revision Date: 27-Nov-2005
3.4.3
Dual Network Support - 10Base-T and Token Ring
Figure 11 shows the LXT901A/907A Transceiver with a Texas Instruments 380C26
CommProcessor. The 380C26 is compatible with Mode 4 (MD0 and MD1 both High). When used
with the 380C26, both the LXT901A/907A Transceiver and a TMS38054 Token Ring transceiver
can be tied to a single RJ-45, allowing dual network support from a single connector. The
LXT901A/907A Transceiver AUI port is not used. The DSQE pin on the LXT907A Transceiver is
tied Low and the STP pin on the LXT901A Transceiver is tied High.
Figure 11. 380C26 Interface for Dual Network Support of 10BASE-T and Token Ring
LX
T
9
01
A
/9
0
7
A
20 MHz
20 pF
CLKI
TXD
TPIN
50
Ω
50
Ω
TPIP
1 : 1
116
14
6
5
4
3
2
1
11
0.1
μF
9
TPONA
TPONB
TPOPB
TPOPA
RJ45
3
6
8
From TI TMS38054 Token
Ring Transceiver
CIN
CIP
DON
DOP
DIN
DIP
RBIAS
GND2
GND1
TEN
1
12.4 k
Ω
TCLK
RCLK
RXD
CD
COL
LBK
PAUI
AUTOSEL
NTH
MD0
MD1
LI
JAB
PLR
TXD
TXE
TXC
RXC
RXD
CRS
COL
LBK
Green Red
Red
PROGRAMMING
OPTIONS
LINE STATUS
1 %
+3.3 V
LEDC/FDE
LEDR
LEDT/PDN
LEDL
VCC1
VCC2
CLKO
330
380C26
2
To TI TMS38054 Token Ring
Transceiver
1 : 2
T
o
1
0
BA
SE
-T
T
W
IS
T
E
D
-
PA
IR
N
E
T
W
OR
K
Bias resistor RBIAS should be located close to the pin
and isolated from other signals.
1
2
3
Additional magnetics and switching logic (not shown)
are required to implement the dual network solution.
24.9
Ω 1%
24.9
Ω 1%
TEST
Optional: Centertap capacitor may improve EMC
depending on board layout and system design.
3
DSQE 907A only
STP 901A only
0.1
μF
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