DJLXT905LC.C2 831645 Intel, DJLXT905LC.C2 831645 Datasheet - Page 8

• Manufacturer Part Number: DJLXT905LC.C2 831645
• Manufacturer: Intel

Specifications of DJLXT905LC.C2 831645

• Lead Free Status / RoHS Status: Not Compliant

LXT905 Universal 10BASE-T Transceiver with 3.3V Support
L
8
Table 1.
Signal Descriptions (Sheet 1 of 2)
1. Externally pull-up or pull-down each pin separately using a 10 k Ω, 1% termination resistor, or tie directly to
2. Do not allow this pin to float. If unused, tie High.
LQFP
Pin #
13
20
27
28
29
30
31
11
12
21
32
V
1
2
3
4
5
6
7
8
9
CC
or ground.
PLCC
Pin #
22
15
23
10
11
12
13
1
–
–
–
2
3
4
–
5
6
7
8
9
Symbol
LEDC/
GND1
GND2
GND3
GND4
LEDT/
VCC1
VCC2
VCC3
VCC4
VCC5
CLKO
LEDR
TCLK
LEDL
CLKI
COL
PDN
LBK
TEN
TXD
FDE
I/O
O
O
O
O
O
O
O
–
–
–
–
–
–
–
–
–
I
I
I
I
I
I
Power Inputs 1 through 5. Power supply inputs of 3.3 V or
5 V.
Crystal Oscillator. Connect a 20 MHz crystal across these
pins, or apply a 20 MHz clock at CLKI, with CLKO left open.
Ground.
Loopback. When High, forces internal loopback. Disables
collision and the transmission of both data and link pulses.
Pulled Low internally.
Transmit Enable. Enables data transmission and starts the
Watch-Dog Timer (WDT). Synchronous to TCLK. Pulled Low
internally
Transmit Clock. A 10 MHz clock output. Connect this clock
signal directly to the transmit clock input of the controller.
Transmit Data. Input signal containing NRZ data to transmit
on the network. Connect TXD directly to the transmit data
output of the controller. Pulled Low internally
Collision Signal. Output that drives the collision detect input
of the controller.
LED Collision or Full-Duplex Enable.
LEDC is an open drain driver for the collision indicator, and
pulls Low during collision. Extends LED “on” (which is Low
output) time by approximately 100 ms.
FDE enables full-duplex mode (external loopback) if tied Low
externally. Pulled High internally
LED Transmit or Power Down.
LEDT is an open drain driver for the transmit indicator.
Extends LED “on” (which is Low output) time by
approximately 100 ms. Pulls output Low during transmit.
If externally tied Low, the LXT905 goes to power down state
(PDN). In power-down mode, LEDT tristates all logic inputs
and outputs.
LED Receive. Open drain driver for the receive indicator
LED. Extends LED “on” (which is Low output) time by
approximately 100 ms. Pulls output Low during receive.
Pulled High internally
LED Link. Open drain driver for link integrity indicator. Pulls
output Low during link test pass. Pulled High internally
1
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1
1
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Description
1
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Revision Date: 19-Oct-2005
Document Number: 249271
Revision Number: 004
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Datasheet
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