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参数资料
| 型号： | WJLXT905LE.C2 |
| 厂商： | CORTINA SYSTEMS INC |
| 元件分类： | 网络接口 |
| 英文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP32 |
| 封装： | ROHS COMPLIANT, MO-136BC, LQFP-32 |
| 文件页数： | 39/40页 |
| 文件大小： | 544K |
| 代理商： | WJLXT905LE.C2 |
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LXT905 Universal 10BASE-T Transceiver with 3.3V Support
8
Datasheet
Document Number: 249271
Revision Number: 004
Revision Date: 19-Oct-2005
L
Table 1.
Signal Descriptions (Sheet 1 of 2)
LQFP
Pin #
PLCC
Pin #
Symbol
I/O
Description
13
20
27
28
29
1
22
–
VCC1
VCC2
VCC3
VCC4
VCC5
–
Power Inputs 1 through 5. Power supply inputs of 3.3 V or
5 V.
30
31
2
3
CLKI
CLKO
I
O
Crystal Oscillator. Connect a 20 MHz crystal across these
pins, or apply a 20 MHz clock at CLKI, with CLKO left open.
11
12
21
32
15
23
4
–
GND1
GND2
GND3
GND4
–
Ground.
15
LBK
I
Loopback. When High, forces internal loopback. Disables
collision and the transmission of both data and link pulses.
Pulled Low internally.
1
26
TEN
I
Transmit Enable. Enables data transmission and starts the
Watch-Dog Timer (WDT). Synchronous to TCLK. Pulled Low
internally1.
37
TCLK
O
Transmit Clock. A 10 MHz clock output. Connect this clock
signal directly to the transmit clock input of the controller.
48
TXD
I
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
1.
59
COL
O
Collision Signal. Output that drives the collision detect input
of the controller.
610
LEDC/
FDE
O
I
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
1.
711
LEDT/
PDN
O
I
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.2
If externally tied Low, the LXT905 goes to power down state
(PDN). In power-down mode, LEDT tristates all logic inputs
and outputs.
812
LEDR
O
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 internally1.
913
LEDL
O
LED Link. Open drain driver for link integrity indicator. Pulls
output Low during link test pass. Pulled High internally1.
1. Externally pull-up or pull-down each pin separately using a 10 k
Ω, 1% termination resistor, or tie directly to
VCC or ground.
2. Do not allow this pin to float. If unused, tie High.
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