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DP83846 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83846
Description  DsPHYTER ?좸ingle 10/100 Ethernet Transceiver
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83846 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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1.3 Clock Interface
1.4 Special Connections
1.5 LED Interface
Signal Name
Type
Pin #
Description
X1
I
67
REFERENCE CLOCK INPUT 25 MHz: This pin is the pri-
mary clock reference input for the DP83846A and must be
connected to a 25 MHz 0.005% (
±50 ppm) clock source.
The DP83846A supports CMOS-level oscillator sources.
X2
O
66
REFERENCE CLOCK OUTPUT 25 MHz: This pin is the
primary clock reference output.
Signal Name
Type
Pin #
Description
RBIAS
I
3
Bias Resistor Connection. A 9.31 k
Ω1% resistor should be
connected from RBIAS to ANA_GND.
RESERVED
I/O
1, 5, 8, 20,
21, 22, 47,
63, 68, 69,
70, 71, 74,
75, 77, 78,
80
RESERVED: These pins must be left unconnected.
Signal Name
Type
Pin #
Description
LED_DPLX/PHYAD0
S, O
33
FULL DUPLEX LED STATUS: Indicates Full-Duplex sta-
tus.
LED_COL/PHYAD1
S, O
32
COLLISION LED STATUS: Indicates Collision activity in
Half Duplex mode.
LED_GDLNK/PHYAD2
S, O
31
GOOD LINK LED STATUS: Indicates Good Link Status for
10BASE-T and 100BASE-TX.
LED_TX/PHYAD3
S, O
30
TRANSMIT LED STATUS: Indicates transmit activity. LED
is on for activity, off for no activity.
LED_RX/PHYAD4
S, O
29
RECEIVE LED STATUS: Indicates receive activity. LED is
on for activity, off for no activity.
LED_SPEED
O
28
SPEED LED STATUS: Indicates link speed; high for 100
Mb/s, low for 10 Mb/s.


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