- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379893 > CLC018 (National Semiconductor Corporation) 8 x 8 Digital Crosspoint Switch, 1.4 Gbps(8 x 8數(shù)字交點(diǎn)開關(guān)，1.4 Gbps) PDF資料下載
參數(shù)資料
| 型號(hào)： | CLC018 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 8 x 8 Digital Crosspoint Switch, 1.4 Gbps(8 x 8數(shù)字交點(diǎn)開關(guān)，1.4 Gbps) |
| 中文描述： | 8 × 8數(shù)字交叉點(diǎn)開關(guān)，1.4吉比特（8 × 8數(shù)字交點(diǎn)開關(guān)，1.4 Gbps）的 |
| 文件頁數(shù)： | 8/17頁 |
| 文件大?。?/td> | 215K |
| 代理商： | CLC018 |
Operation
(Continued)
the range is best. For ECL signals this point is about 2 diode
drops below ground. It is possible to bias the unused input
with a low-pass filtered version of the data, as shown in Fig-
ure 5 In some coding schemes there are pathological pat-
terns that result in long sequences with no data transitions.
During these patterns, the bias on the unused input will drift
towards the other input reducing the noise immunity which
makes this scheme undesirable. The most robust solution for
single ended inputs is to place a comparator with hysteresis
in front of the CLC018. Such a part is the MC10E1652. See
Figure 6 for an example of how to hook this up.
OUTPUT INTERFACING
The outputs of the CLC018 are differential, current source
outputs. They can be converted to ECL compatible levels
with the use of resistive loads as shown in Figure 7 The out-
put swings will have a similar temperature coefficient to
10KECLif a 1N4148 diode is used to set V
. For most com-
mercial temperature range applications, a 75
resistor can
be used as shown in Figure 8 Many circuits with differential
inputs, such as the CLC016 Data Retimer With Automatic
Rate Selection, do not require true ECL levels, so the load
resistors can be connected directly to the positive rail as
shown in Figure 9
POWER SUPPLIES, GROUNDING AND BYPASSING
The CLC018 uses separate power supplies for control and
data circuitry. Data circuitry is supplied via V
and control
circuitry via V
. Supply connection V
, the negative-most
supply, is the common return for both. Connection details for
the different powering modes is shown in Table 1
Internal and external capacitances, normal and parasitic,
must be charged and discharged with changes in output volt-
age. Charging current depends upon the size of these ca-
pacitances and the rate of change of voltage.At the fast tran-
sition times of the CLC016, small amounts of stray
capacitance at outputs can produce large output and supply
transient currents. Controlling transient currents requires
particular attention to minimizing stray capacitances and to
providing effective bypassing in the design. Good and effec-
tive bypassing consisting of 0.01 μF to 0.1 μF monolithic ce-
ramic and 4.7 μF to 10 μF, 35V tantalum capacitors. These
capacitors should be placed as close to power pins as prac-
tical and tightly connected to the power plane sandwich us-
ing multiple vias. Needless to say, multilayer board technol-
ogy should be employed for the CLC018 and similar high-
frequency-capability devices.
CONFIGURING THE SWITCH
The CLC018 can be configured so that any output may be in-
dependently connected to any input and any input be con-
nected to any or all outputs. Each output may be indepen-
dently enabled or placed in a high-impedance state.
Data controlling the switch matrix and output mode are
stored in two ranks of eight, 4-bit registers, one register per
output. The three most-significant bits in each register iden-
tify the input to be connected to that output. The least-
significant bit controls whether the output is active or
TRI-STATE. A particular register in the first rank, the LOAD
REGISTERS, is selected by a 3-bit word placed on the out-
DS100088-14
FIGURE 5. Single Ended Input to CLC018
DS100088-15
FIGURE 6. Single Ended Input to CLC018
DS100088-16
FIGURE 7. Generating 10k ECL Outputs
DS100088-17
FIGURE 8. Generating ECL Outputs
DS100088-18
FIGURE 9. Connecting the CLC018 to the CLC016
C
www.national.com
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CLC020BCQ | SMPTE 259M Digital Video Serializer with Integrated Cable Driver |
| CLC020 | SMPTE 259M Digital Video Serializer with Integrated Cable Driver(SMPTE 259M數(shù)字視頻串行器帶集成電纜驅(qū)動(dòng)器) |
| CLC020ACQ | SMPTE 259M Digital Video Serializer with Integrated Cable Driver |
| CLC021AVGZ-3.3 | SMPTE 259M Digital Video Serializer with EDH Generation and Insertion |
| CLC021AVGZ-5.0 | SMPTE 259M Digital Video Serializer with EDH Generation and Insertion |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CLC018_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8 x 8 Digital Crosspoint Switch, 1.485 Gbps |
| CLC018AJVJQ | 制造商:Texas Instruments 功能描述:Digital Crosspoint Single 8x8 1.485Gbps 64-Pin PQFP Tray |
| CLC018AJVJQ/NOPB | 功能描述:IC CROSSPOINT SWITCH 8X8 64PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 標(biāo)準(zhǔn)包裝:48 系列:- 功能:開關(guān) 電路:4 x SPST - NO 導(dǎo)通狀態(tài)電阻:100 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
| C-LC01-E3-KIT | 制造商:TDK 功能描述:KIT CAP CER HI CAP MLCC SMD |
| CLC020 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SMPTE 259M Digital Video Serializer with Integrated Cable Driver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。