參數(shù)資料
型號: L80227
廠商: LSI CORP
元件分類: 網(wǎng)絡接口
英文描述: 10BASE-T/100BASE-TX Ethernet Physical Layer Device (PHY)(10BASE-T/100BASE-TX 以太網(wǎng)物理層處理器)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封裝: LQFP-64
文件頁數(shù): 38/158頁
文件大?。?/td> 1084K
代理商: L80227
Draft 6/5/00
2-18
Functional Description
Copyright 1999 by LSI Logic Corporation. All rights reserved.
generates a stair-stepped representation of the desired output waveform.
The stairstepped DAC output then is passed through a low-pass filter to
“smooth” the DAC output and remove any high-frequency components.
The DAC values are determined from the data at the ROM addresses.
The data is chosen to shape the pulse to the desired template. The clock
generator clocks the data into the DAC at high speed. In this way, the
waveform generator preshapes the output waveform to be transmitted
onto the twisted-pair cable to meet the pulse template requirements
outlined in IEEE 802.3 Clause 14 and shown in
Figure 2.4
. The
waveshaper replaces and eliminates external filters on the TP transmit
output.
The line driver converts the shaped and smoothed waveform to a current
output that can drive greater than 100 meters of category 3/4/5 100-ohm
unshielded twisted-pair cable or 150-ohm shielded twisted-pair cable
without any external filters.
During the idle period, no output signals are transmitted on the TP
outputs except for link pulses.
Figure 2.4
TP Output Voltage Template
1.0
0.8
0.6
0.4
0.2
0.0
- 0.2
- 0.4
- 0.6
- 0.8
- 1.0
0
10
20
30
40
Time (ns)
50
60
70
80
90
100
110
Voltage (V)
A
B
C
D
E
G
N
O
P
Q
T
V
W
U
R
L K
J
M
F
H
I
S
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
L80227/B 制造商:LSI Corporation 功能描述: 制造商:LSI Corporation 功能描述:L80227/B
L80227/BI 制造商:LSI Corporation 功能描述:L80227/BI
L80227FR 制造商:LAUREL ELECTRONICS 功能描述:Laureate 1/8 DIN multi-function counter / timer, universal 85-264 Vac power, two
L80227-I 制造商:LSI Corporation 功能描述:STD CELL ASIC
L80227-I-LEADFREE 制造商:LSI Corporation 功能描述:796000124413