Data Sheet
July 2000
LU6612
FASTCAT Single-FET for 10Base-T/100Base-TX
Description (continued)
VDD
VDD
Q = 0 Ω
L = OPEN
RJ-45
L = 1:1; Q = 1.25:1
TX
8
1
L = 50 Ω
Q = 86.6 Ω
L = 220 Ω
Q = 39 Ω
L = 0 Ω
Q = OPEN
2
3
L = 50 Ω
Q = 86.6 Ω
L = 220 Ω
Q = OPEN
L = Q = 75 Ω
TY
RX
4
5
6
7
8
9
L = 0.01 Ω
Q = 0.1 µF
LU6612
QS6612
L = Q = 1:1
63
L = 0 Ω
Q = 60 Ω
Q = 20 Ω
L = 50 Ω
L = 50 Ω
Q = 0 Ω
L = 0 Ω
Q = 20 Ω
L = Q = 75 Ω
RY
64
L = 0.01 µF L = 0.01 µF
Q = OPEN Q = 0.1 µF
L = Q = 75 Ω
L = Q = 75 Ω
Q = 0 Ω
L = OPEN
Q = 0 Ω
L = OPEN
L = 0.01 µF
Q = 1000 pF
L = 0 Ω
Q = OPEN
L = 0 Ω
Q = OPEN
L = 0.001 µF
L = 0.001 µF
5-5433.j
Key:
L = Lucent’s LU6612.
Q = Quality Semiconductor Inc. QS6612.
Figure 4. Onboard Universal Twisted-Pair Interface Circuit to Interchange Lucent and
Quality Semiconductor Inc. Parts
Lucent Technologies Inc.
7
AGERE [ AGERE SYSTEMS ]
