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| 型号： | ICS1890Y-14 |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 1 CHANNEL(S), 100M bps, SERIAL COMM CONTROLLER, PQFP64 |
| 封装： | TQFP-64 |
| 文件页数： | 6/66页 |
| 文件大小： | 1749K |
| 代理商： | ICS1890Y-14 |
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14
ICS1890
0.1
1
10
100
30
20
10
0
typical
worst case
Cable Attenuation (dB) v. Freq. (MHz)
Figure 3
Figure 4
Typical and worst case frequency response for 100 meters
(worst case length as derived from draft standard EIA/TIA-
568- A) of UTP Category 5 cable is shown in Figure 3.
The pulse shape of the received signal is critical for MLT-3
encoded data since there are three distinct levels to resolve in
order to properly recover the data. Figure 4 shows the typical
signal at the input and output ends of 100 meters of UTP
Category 5 cable.
Since the cable length that must be equalized can be anything
from 0 to 105 meters, the optimum equalization cannot be fixed,
but must depend on cable length. Thus, adaptive equalization
must be applied at the receive end to restore the signal.
Theadaptiveequalizationprocessconsistsofapplyingincreasing
amounts of phase and gain correction while monitoring the
integrity of the recovered data. The adaptive equalizer picks
the best of 32 equalization settings and Fixes this value into
the equalization register.This setting provides the best recovery
of the transmitted data with lowest Bit Error Rate (BER).
LineTransmitter The line transmitter logic of theICS1890
is a current-driven differential driver which can be programmed
for either two-level (10Base-T, Manchester) or three-level
(100Base-TX, MLT-3) transmission. Waveshaping is applied
to control the output edge rate and eliminate the need for
expensive external filters. The transmitter interfaces directly to
an inexpensive isolation transformer (magnetics).
Line Receiver The line receiver circuit accepts either a
differential two-level (10Base-T, Manchester) or three-level
(100Base-TX, MLT-3) signal which first passes through an
isolationtransformer.IfthepolaritycorrectbitintheConfiguration
Register is asserted, the ICS1890 has sensed the reversed
polarity of the receive pair and can switch polarity automatically.
MagneticsA Universal Magnetics module is used to provide
isolation and signal coupling onto the twisted pair cabling for
both 10Base-T and 100Base-TX.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS1890Y-4 | 制造商:ICS 功能描述:1890Y-4 |
| ICS1891 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LAN Transceiver |
| ICS1891Y | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LAN Transceiver |
| ICS1892 | 制造商:ICS 制造商全称:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver |
| ICS1892Y | 制造商:ICS 制造商全称:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver |
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