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參數(shù)資料
| 型號： | CLC012 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Adaptive Cable Equalizer for ITU-T G.703 Data Recovery |
| 中文描述： | 自適應(yīng)電纜均衡器的ITU - T符合G.703數(shù)據(jù)恢復 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大?。?/td> | 567K |
| 代理商： | CLC012 |
Input Interfacing
The CLC012 accepts either differential or single-ended input
voltage specified in
Static Performance
. The following sec-
tions show several suggestions for interfaces for the inputs
and outputs of the CLC012.
SINGLE-ENDED INPUT INTERFACE: 75
Coaxial Cable
The input is connected single-ended to either DI or DI as
shown in Figure 3 Balancing unused inputs helps to lessen
the effects of noise. Use the equivalent termination of 37.4
to balance the input impedance seen by each pin. It also
helps to terminate grounds at a common point. Resistors R
x
and R
are recommended for optimum performance. The
equalizer inputs are self-biasing. Signals should be AC
coupled to the inputs as shown in Figure 3
DIFFERENTIAL INPUT INTERFACE: Twisted Pair
A recommended differential input interface is shown in Fig-
ure 4 Proper voltage levels must be furnished to the input
pins and the proper cable terminating impedance must be
provided. For Category 5 UTP this is approximately 100
.
Figure 4shows a generalized network which may be used to
receive data over a twisted pair. Resistors R
and R
provide
the proper terminating impedance and signal level adjust-
ment. The blocking capacitors provide AC coupling of the at-
tenuated signal levels. The plots in the
Typical Perfor-
mance
Characteristics
section
equalized data rates using Category 5 UTP at 100 meter
lengths. A full schematic of a recommended driver and re-
ceiver circuit for 100
Category 5 UTP is provided in the
Typical Applications
section with further explanation.
demonstrate
various
Output Interfacing
The outputs DO and DO produce ECL logic levels when the
recommended output termination networks are used. The
DO and DO pins are
not complementary emitter coupled
logic
outputs. Instead, the outputs are taken off of the collec-
tors of the transistors. Therefore, care must be taken to meet
the interface threshold levels required by ECL families. Rec-
ommended interfaces for standard ECL families are shown
in the following circuits.
DIFFERENTIAL LOAD-TERMINATED OUTPUT
INTERFACE
Figure 5 shows a recommended circuit for implementing a
differential output that is terminated at the load. A diode or
75
resistor provides a voltage drop from the positive supply
(+5V for PECL or Ground for ECL operation) to establish
proper ECL levels. The resistors terminate the cable to the
characteristic impedance. The output voltage swing is deter-
mined by the CLC012 output current (10 mA) times the ter-
mination resistor. For the circuit in Figure 5 the nominal out-
put voltage swing is 750 mV.
DIFFERENTIAL SOURCE-TERMINATED OUTPUT
INTERFACE
Figure 6 is similar to Figure 5 except that the termination is
provided at the source. This configuration may also be used
for single-ended applications. However, the unused output
must still be terminated as shown.
DS100145-22
FIGURE 3. Single-Ended 75
Cable Input Interface
DS100145-24
FIGURE 4. Twisted Pair Input Interface
DS100145-25
FIGURE 5. Differential Load Terminated
Output Interface
DS100145-26
FIGURE 6. Differential Source Terminated
Output Interface
9
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC012_03 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adaptive Cable Equalizer for ITU-T G.703 Data Recovery |
| CLC012AJE | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adaptive Cable Equalizer for ITU-T G.703 Data Recovery |
| CLC012AJE/NOPB | 功能描述:IC CABLE EQUALIZER ADAPT 14SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
| CLC012AJE-TR13/NOPB | 功能描述:IC CABLE EQUALIZER ADAPT 14-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應(yīng)用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2 |
| CLC014 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adaptive Cable Equalizer for High-Speed Data Recovery |
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