Transmitter - Receiver Diagram - Marvell 88E3015 Manual

6.3 Transmitter - Receiver Diagram

Figure 35: Transmitter - Receiver Diagram
3.3V
Ω
69
Ω
174
Sink 0 mA
3.3V
Ω
69
Ω
174
Sink 15 mA
Common mode:
®
Marvell 100BASE-FX PHY
Transmitter
Copyright © 2008 Marvell
January 4, 2008, Advance
OFF
174
x 3.3 = 2.36V
V =
174 + 69
V
i
ON
V = 3.3 - (15 + i) 69 = 174i
V = 1.62V
V
2.36 + 1.62
= 2V
2
Document Classification: Proprietary Information
Application Examples
Transmitter - Receiver Diagram
3.3V
Ω
1k
1.65V
Ω
1k
The receiver should be biased between
1.2V to 2.5V. The middle value of 1.65V
is choosen as an example.
®
Marvell 100BASE-FX PHY
Receiver
Doc. No. MV-S103657-00, Rev. D
Page 119