參數(shù)資料
型號(hào)： LU3X31T-T64
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(wàn)位和100米位以太網(wǎng)收發(fā)器）
文件頁(yè)數(shù)： 16/44頁(yè)
文件大?。?/td> 580K
代理商： LU3X31T-T64
16
Lucent Technologies Inc.
LU3X31T-T64 Single-Port 3 V
10/100 Ethernet Transceiver TX
Preliminary Data Sheet
July 2000
Functional Description
(continued)
100Base-TX Transceiver
LU3X31T-T64 implements a TP-PMD compliant trans-
ceiver for 100Base-TX operation. The differential trans-
mit driver is shared by the 10Base-T and 100Base-TX
subsystems. This arrangement results in one device
that uses the same external magnetics for both the
10Base-T and the 100Base-TX transmission with sim-
ple RC component connections. The individually wave-
shaped 10Base-T and 100Base-TX transmit signals
are multiplexed in the transmit output driver.
Transmit Drivers
The LU3X31T-T64 100Base-TX transmit driver imple-
ments MLT-3 translation and wave-shaping functions.
The rise/fall time of the output signal is closely con-
trolled to conform to the target range specified in the
ANSITP-PMD standard.
Twisted-Pair Receiver
For 100Base-TX operation, the incoming signal is
detected by the on-chip twisted-pair receiver that com-
prises the differential line receiver, an adaptive equal-
izer, and baseline wander compensation circuits.
The LU3X31T-T64 uses an adaptive equalizer which
changes filter frequency response in accordance with
cable length. The cable length is estimated based on
the incoming signal strength. The equalizer tunes itself
automatically for any cable length to compensate for
amplitude and phase distortions incurred from the
cable.
10Base-T Module
The 10Base-T Transceiver Module is IEEE802.3 com-
pliant. It includes the receiver, transmitter, collision,
heartbeat, loopback, jabber, waveshaper, and link
integrity functions, as defined in the standard. Figure 4
provides an overview for the 10Base-T module.
The LU3X31T-T64 10Base-T module is comprised of
the following functional blocks:
I
Manchester encoder and decoder
I
Collision detector
I
Link test function
I
Transmit driver and receiver
I
Serial and parallel interface
I
Jabber and SQE test functions
I
Polarity detection and correction
5-6782(F)r3
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
10 Mbit PHY
LOOPBACK
PATH
TPRX
±
TPTX
±
RXDV
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