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ML6652 Datasheet(PDF) 6 Page - Micro Linear Corporation

Part # ML6652
Description  10/100Mbps Ethernet Fiber and Copper Media Converter with Auto Negotiation
PDF  28 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML6652 Datasheet(HTML) 6 Page - Micro Linear Corporation

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ML6652
6
January 2002
Preliminary Datasheet
Note: The ML6652 fiber interface quantizer sensitivity can be adjusted via
Register 30 bits 5, 6 and 7 to accomodate various cable lengths and signal
intensity.
25
DUPLEX
I
This input can have one of three levels: VCC, VCC/2 or 0 Volts. This input has
80K ohm resistors internally connected to both VCC and Ground, generating
VCC/2 at the input if left unconnected. Settings defined by the DUPLEX power
up preset pin can be over written by the management interface. At power up
the DUPLEX pin causes the following default values to be written to
management register 30.
Note: this pin is typically read a few microseconds after power-up, if it is tied
to supplies that do not track the ML6652 power improper results will occur.
Use VCCD (pin 19) as the pull up point, do not add decoupling capacitors to
this input pin (without thoroughly understanding your PCB layout dynamics the
safest course is to make short connections and do not add decoupling
capacitors to this input pin).
Pin No. Signal Name
I/O
Description
8
PECLQU
I
The fiber interface is selected as shown in Table 3.
When using an LED driver and fiber optic receiver, this pin also defines the
maximum supported link distance.
When the 300m maximum link length is selected, the voltage thresholds for
Signal Detect are increased.
PIN DESCRIPTIONS (continued)
U
Q
L
C
E
P
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7
.
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3
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0m
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20
m
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0
5
80
C
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3
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0m
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2
/
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20
m
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0
0
3
11
C
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0m
0
0
3
/
m
0
0
31
m
n
0
0
3
1
r
o
0
5
80
Table 3.
Table 4.
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