S2068TB Applied Micro Circuits Corporation, S2068TB Datasheet - Page 22

• Manufacturer Part Number: S2068TB
• Manufacturer: Applied Micro Circuits Corporation

Specifications of S2068TB

• Number Of Receivers: 2
• Protocols Supported: IEEE 802.3z
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 3.47V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

OUTPUT LOAD
The S2068 serial outputs require a resistive load to
set the output current. The recommended resistor
value is 4.5 k
to adjust drive current, signal voltage swing, and
power usage on the board.
ACQUISITION TIME
With the input eye diagram shown in Figure 21, the
S2068 will recover data with a 1E-9 BER within the
time specified by T
taneous phase shift of the incoming data.
Figure 16. Serial Input/Output Rise and Fall Time
Figure 17. TTL Input/Output Rise and Fall Time
Figure 18. Serial Output Load
22
S2068
+2.0V
+0.8V
80%
50%
20%
to ground. This value can be varied
T
T
LOCK
r
r
in Table 18 after an instan-
Vcc -1.3 V
T
T
f
f
4.5 k
4.5 k
0.01 f
0.01 f
+2.0V
+0.8V
80%
50%
20%
DUAL GIGABIT ETHERNET TRANSCEIVER
Figure 19. High Speed Differential Inputs
Figure 20. Receiver Input Eye Diagram Jitter Mask
Amplitude
Figure 21. Acquisition Time Eye Diagram
0.01 f
0.01 f
1.3
1.0
0.8
0.7
0.5
0.3
0.2
0.0
100
Vcc - 1.3 V
Normalized Time
October 13, 2000 / Revision D
Bit Time
24%