■ BCM5221 Product Application Note
■ BCM5220 7/7/00
Broadcom Corporation
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
RXD1
RXD0
TXD1
TXD0
TXEN
CRS_DV
REF_CLK
REF_CLK
BCM5221 PHY
(100BASE-FX)
RXD0
RXD1
TXD0
TXD1
TXEN
CRS_DV
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
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