■
BCM5221
Product Application Note
■
BCM5220
7/7/00
Bro a d c o m C o rp o r a t i o n
Page 11
5221/5220-AN01 Product Application Note, Revision R
Figure 6:
Media Conversion Connection Example
TD+
BCM5221 PHY
(100BASE-TX)
TD-
2.5V
2.5V
1:1
RD+
RD-
49.9
Ω
MDIX Magnetics
2.5V
1:1
49.9
Ω
49.9
Ω
49.9
Ω
2KV, 1nF
0.01uF
3
6
2
1
RX
D1
RX
D0
TXD
1
TX
D
0
TX
EN
CR
S
_
DV
REF_CLK
REF_CLK
BCM5221 PHY
(100BASE-FX)
RX
D
0
RX
D
1
TX
D
0
TX
D
1
TXE
N
CR
S
_
D
V
50MHz +/-50ppm
Xtal based clock source.
(Clock source must not be
PLL based)
50MHz
SD+
SD-
TD+ TD-
RD+ RD-
SD+
Fiber Transceiver
(100BASE-FX - Mini MTRJ)
TD+ TD-
RD+ RD-
Voltage Divider
(1.7V)
Refer to 100BASE-FX
section in this application
note for termination details
Series Source Termination required
only if the two BCM5221 devices are
greater than 2 inches apart
RJ45-8