- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384634 > LU3X31FT (Lineage Power) Single-Port 3 V 10/100 Ethernet Transceiver TX/FX(單端口 3 V 10M位和100M位以太網(wǎng)收發(fā)器) PDF資料下載
參數(shù)資料
| 型號： | LU3X31FT |
| 廠商： | Lineage Power |
| 英文描述： | Single-Port 3 V 10/100 Ethernet Transceiver TX/FX(單端口 3 V 10M位和100M位以太網(wǎng)收發(fā)器) |
| 中文描述： | 單端口3伏10/100以太網(wǎng)收發(fā)器德克薩斯州/外匯（單端口3伏1000萬位和100米位以太網(wǎng)收發(fā)器） |
| 文件頁數(shù)： | 18/50頁 |
| 文件大?。?/td> | 633K |
| 代理商： | LU3X31FT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
18
Lucent Technologies Inc.
LU3X31FT Single-Port 3 V
10/100 Ethernet Transceiver TX/FX
Preliminary Data Sheet
July 2000
Functional Description
(continued)
5-6782(F)
Figure 4. 10Base-T Module Data Path
FILTER
RECEIVE
FILTER
10BASE-T
RECEIVE
PCS
SMART
SQUELCH
CLOCK
RECOVERY
WAVE
SHAPER
10/100
TRANSMIT
DRIVER
10BASE-T
TRANSMIT
PCS
RXCLK
CRS
RXD[3:0]
COL
TXEN
TXER
TXD[3:0]
TXCLK
10M PHY
LOOPBACK
PATH
TPRX
±
TPTX
±
RXDV
Operation Modes
The LU3X31FT 10Base-T module is capable of operat-
ing in either half-duplex mode or full-duplex mode. In
half-duplex mode, the LU3X31FT functions as an IEEE
802.3 compliant transceiver with fully integrated filter-
ing. The COL pin signals collision, and the CRS is
asserted during transmit and receive. In full-duplex
mode, the LU3X31FT can simultaneously transmit and
receive data. The COL signal is inactive, and CRS is
asserted during receive only.
Manchester Encoder/Decoder.
Data encoding and
transmission begins when the transmit enable input
(TXEN) goes high and continues as long as the trans-
ceiver is in good link state. Transmission ends when the
transmit enable input goes low. The last transition
occurs at the center of the bit cell if the last bit is a 1, or
at the boundary of the bit cell if the last bit is 0.
Decoding is accomplished by a differential input
receiver circuit and a phase-locked loop that separates
the Manchester-encoded data stream into clock signals
and NRZ data. The decoder detects the end of a frame
when no more midbit transitions are detected. Within
one and a half bit times after the last bit, carrier sense
is deasserted.
Transmit Driver and Receiver.
LU3X31FT integrates
all the required signal conditioning functions in its
10Base-T block such that external filters are not
required. Only an isolation transformer and impedance
matching resistors are needed for the 10Base-T trans-
mit and receive interface. The internal transmit filtering
ensures that all the harmonics in the transmit signal are
attenuated properly.
Smart Squelch.
The smart squelch circuit is responsi-
ble for determining when valid data is present on the
differential receive. The LU3X31FT implements an
intelligent receive squelch on the TPRX
±
differential
inputs to ensure that impulse noise on the receive
inputs will not be mistaken for a valid signal. The
squelch circuitry employs a combination of amplitude
and timing measurements (as specified in the IEEE
802.3 10Base-T standard) to determine the validity of
data on the twisted-pair inputs.
The signal at the start of the packet is checked by the
analog squelch circuit, and any pulses not exceeding
the squelch level (either positive or negative, depend-
ing upon polarity) will be rejected. Once this first
squelch level is overcome correctly, the opposite
squelch level must then be exceeded within 150 ns.
Finally, the signal must exceed the original squelch
level within a further 150 ns to ensure that the input
waveform will not be rejected.
Only after all of these conditions have been satisfied
will a control signal be generated to indicate to the
remainder of the circuitry that valid data is present.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LU3X32FT | Two-Port 3 V 10/100 Ethernet Transceiver TX/FX(雙端口 3 V 10M位和100M位以太網(wǎng)收發(fā)器) |
| LU3X34FT | Quad 3 V 10/100 Ethernet Transceiver TX/FX(四3 V 10/100以太網(wǎng)收發(fā)器) |
| LU3X51FT-J80 | Single-Port 3V 10/100 Ethernet TransceiverTX/FX(單端口3V 10/100以太網(wǎng)收發(fā)器) |
| LU3X54FTL | Quad-FET for 10Base-T/100Base-TX/FX(應用于10基數(shù)-T和100基數(shù)-TX/FX的四快速以太網(wǎng)收發(fā)器) |
| LU5X31F | Gigabit Ethernet Transceiver(千兆位以太網(wǎng)收發(fā)器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LU3X31T2T64 | 制造商:LUCENT 功能描述:NEW |
| LU3X31T-T64 | 制造商:AGERE 制造商全稱:AGERE 功能描述:LU3X31T-T64 Single-Port 3 10/100 Ethernet Transceiver TX |
| LU3X34FTR | 制造商:AGERE 制造商全稱:AGERE 功能描述:Quad 3 V 10/100 Ethernet Transceiver TX/FX |
| LU3X34FTR-HS128-DB | 制造商:AGERE 制造商全稱:AGERE 功能描述:Quad 3 V 10/100 Ethernet Transceiver TX/FX |
| LU3X54FT | 制造商:AGERE 制造商全稱:AGERE 功能描述:QUAD-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX |
發(fā)布緊急采購，3分鐘左右您將得到回復。