GIGABIT ETHERNET TRANSCEIVER
OUTPUT LOAD
S2060
Figure 17. High Speed Differential Inputs
The S2060 serial outputs require a resistive load to
set the output current. The recommended resistor
value is 150 Ω to ground. This value can be varied to
adjust drive current, signal voltage swing, and power
usage on the board.
Vcc - 1.3 V
0.01 µF
ACQUISITION TIME
100 Ω
With the input eye diagram shown in Figure 19, the
S2060 will recover data with a 10E-9 BER within the
time specified by TLOCK in Table 9 after an instanta-
neous phase shift of the incoming data.
0.01 µF
Figure 18. Receiver Input Eye Diagram Jitter Mask
Figure 14. Serial Input Rise and Fall Time
80%
50%
20%
80%
50%
20%
Bit Time
Tr
Tf
Amplitude
Figure 15. TTL Input/Output Rise and Fall Time
+2.0 V
+0.8 V
+2.0 V
+0.8 V
24%
Tr
Tf
Figure 16. Serial Output Load
Figure 19. Acquisition Time Eye Diagram
1.3
1.0
0.01 µF
0.8
0.7
150 Ω
150 Ω
0.5
0.3
0.2
0.01 µF
0.0
Normalized Time
March 7, 2001 / Revision H
21
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
