EELXT901APC.A4 S L8L5 Cortina Systems Inc, EELXT901APC.A4 S L8L5 Datasheet - Page 25

• Manufacturer Part Number: EELXT901APC.A4 S L8L5
• Manufacturer: Cortina Systems Inc

Specifications of EELXT901APC.A4 S L8L5

• Lead Free Status / RoHS Status: Compliant

3.4.3
Datasheet
Document #: 249097
Revision #: 002
Rev. Date: June 19, 2001
Figure 11. 380C26 Interface for Dual Network Support of 10BASE-T and Token Ring
To TI TMS38054 Token Ring
Green Red Red Red
330
PROGRAMMING
LINE STATUS
REMOTE
STATUS
380C26
OPTIONS
Transceiver
Dual Network Support - 10Base-T and Token Ring
Figure 11
is compatible with Mode 4 (MD0 and MD1 both High). When used with the 380C26, both the
LXT901/907 and a TMS38054 Token Ring transceiver can be tied to a single RJ-45 allowing dual
network support from a single connector. The LXT901/907 AUI port is not used. The LXT901
STP is High and the LXT907 DSQE is Low.
330
RXC
RXD
CRS
TXD
TXC
COL
TXE
+5 V
LBK
330
0.1 F
shows the LXT901/907 with a Texas Instruments 380C26 CommProcessor. The 380C26
330
20 pF
RJAB
RLD
RCMPT
LI
TXD
TEN
TCLK
RCLK
RXD
CD
COL
LBK
AUTOSEL
NTH
MD0
MD1
STP (LXT901)
DSQE (LXT907)
JAB
PLR
TEST
PAUI
LEDC/FDE
LEDR
LEDT/PDN
LEDL
VCC1
VCC2
CLKI
20 MHz
Universal 10BASE-T and AUI Transceivers — LXT901/907
CLKO
20 pF
GND1
TPONB
TPONA
TPOPA
TPOPB
RBIAS
GND2
TPIN
TPIP
DON
DOP
CIN
DIN
DIP
CIP
12.4 k
1
24.9
24.9
0.1 F
50
50
1
2
3
3
Additional magnetics and switching logic (not shown)
are required to implement the dual network solution.
Optional: Centertap capacitor may improve EMC
depending on board layout and system design.
Bias resistor RBIAS should be located close to the pin
and isolated from other signals.
1
3
6
8
1 : 2
1 : 1
From TI TMS38054 Token
Ring Transceiver
16
14
11
9
2
RJ45
6
5
4
3
2
1
25