Altima AC101 Series, Manual, Page: 46 / 64

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AC101 Preliminary Data Sheet
06/04/01
B r o a d c o m
Page 36 SMI Read/Write Sequence Document AC101-DS01-405-R¥¥¥¥¥
REFCLK
AND
XTAL P
IN
C
HARACTERISTICS
I/O C
HARACTERISTICS
– LED/CFG P
IN
C
HARACTERISTICS
100BASE-TX T
RANSCEIVER
C
HARACTERISTICS
Table 33: REFCLK and XTAL Pin Characteristics
Parameter Symbol Conditions Min Typ Max Units
Input Voltage Low Vil 0.8 V
Input Voltage High Vih 2.0 V
Input Clock Frequency
Tolerance F ±50 ppm
Input Clock Duty Cycle Tdc 40 60 %
Input Capacitance Cin 3.0 pF
Table 34: I/O Characteristics – LED/CFG Pin Characteristics
Parameter Symbol Conditions Min Typ Max Units
Output Low Voltage Vol 0.4 V
Output High Voltage Voh 2.4 V
Input Current Ii 8 8
µ
A
Output Current Io -10 10 mA
Table 35: 100BASE-TX Transceiver Characteristics
Parameter Symbol Conditions Min Typ Max Units
Peak to Peak Differen-
tial Output Voltage Vp Note 1 1.9 2.0 2.1 V
Output Voltage Symme-
try Vss Note 1 .98 1.02 mV
Signal Rise/Fall Time Trf Note 1 3.0 5.0 ns
Rise/Fall Time Symme-
try Trfs Note 1 3 4 4 ns
Duty Cycle Distortion Dcd +250 ps
Overshoot/Undershoot Vos 5 %
Output Jitter Scrambled Idle 1.4 ns
Receive Jitter Tolerance 4 ns
Output Current High Ioh 1:1 Transformer 40 mA
Output Current High Ioh 1.25:1 Transformer 32 mA
Note 1: 50
Ω
(± 1%) resistor to VCC on each output.